Xingning City***Resource Limited Company

Wastewater treatment

set

plan

square

case

Guangzhou Yiteng Environmental Protection Equipment Co., Ltd

two0August 2017

catalogue

Chapter One general narrate, recount, state

1.1Overview of wastewater discharge

1.2Design Concept

Chapter Two Design based on specifications and principles

2.1 Design Principles

2.2 Design Basis

2.3Design scope

2.4Design water quantity, water quality, and governance objectives

Chapter Three Process Design

3.1 Process requirements

3.2 Analysis of Processing Technology Route

3.3Process Flow Diagram

3.4Process Introduction

Chapter Four Newly added design parameters for major structures

4.1 equalization tank

4.2 Microfiltration recycling machine

4.3 Wastewater reaction sedimentation tank

4.4 Air flotation processor

4.5 reclaimed water tank

4.6 Biochemical treatment tank

4.8 PHAdjust the pool

Chapter Five Power distribution and automatic control

5.1 Design scope

5.2 Power supply and electrical load

5.3 Cable and laying

5.4 lightning protection grounding

Chapter Six operating cost

6.1 Operating costs (for reference only)

Chapter Seven Engineering Estimation

7.1 Process equipment, electrical and materials

7.2 Civil engineering section (consisting ofOwners are responsible for

7.3 Total estimate

Chapter One

Chapter Twogeneral narrate, recount, state

Xingning City***Resource Limited Company Engaged in Waste ManagementPET bottle recycling and regeneration. The production process includes processes such as cleaning, sorting, and crushing. The company generates a total of approximately 1500 cleaning wastewater and domestic sewage from employees' offices and daily lives every day m³The company's leaders attach great importance to environmental protection and have built a set of wastewater treatment facilities in accordance with the requirements of the three simultaneities.With the increasingly serious problem of water pollution in China in recent years, relevant departments in some regions have formulated a series of regulations and requirements. The company's sewage treatment system must be constructed in accordance with relevant requirements,Ensure the proper operation of wastewater.

On behalf of the owner, our company's personnel consulted with relevant technical personnel from the factory and, based on understanding and mastering the existing production capacity and combining relevant data from similar industries, developed the following set of treatment plans for the wastewater treatment.

1.1 WastewaterEmission Overview

Owners provide daily wastewater volume1500 m³Wastewater is collected from the sewage pipe network to the location of the treatment equipment. The amount of wastewater at each location is shown in the table below:

1.2 Design Ideas

Taking into account the investment cost, ease of operation, and easy maintenance, the following suggestions are suggested:

①The placement of sewage treatment system facilities shall be designed according to the site terrain;

②Try to minimize secondary upgrades to reduce power consumption;

③Try to utilize existing wastewater treatment facilities and reduce investment.

Chapter Two Design based on specifications and principles

2.1 Design Principles

●Strictly implement national environmental protection policies, comply with relevant national laws, regulations, standards, norms, and local regulations, and fully reflect the specific requirements of the owner for the project.

●Based on relevant documents from departments such as the Ministry of Construction of the National Development and Reform Commission and the State Environmental Protection Administration.

●Seriously implement the national guidelines and policies on environmental protection work, carefully formulate them, achieve advanced technology, economic rationality, safety and practicality, and reliable quality.

●According to the principle of unified planning and phased construction, taking into account both short-term and long-term project content, focusing on short-term development and considering long-term development.

●Make full use of the site planned by the owner, optimize the layout, and strive to construct buildings with simple and beautiful shapesIt not only coordinates with the development of the factory area, but also maximizes the engineering benefits.

●According to the requirements for wastewater inlet and outlet, mature, reliable, efficient, energy-saving, land saving, economical and practical, and easy to manage advanced wastewater treatment processes are selected to ensure the effectiveness of wastewater treatment, reduce project investment and daily operating costs.

●Based on the actual situation of this project, automation instruments, equipment, and monitoring instruments suitable for China's national conditions will be adopted to improve the level of automation management and power supply safety, in order to reduce the labor intensity of workers and improve working conditions.

●Adopting high-quality domestically produced equipment to save project investment.

●Properly handle and dispose of the slag and sludge generated during the sewage treatment process.

●The factory environment is beautiful, the buildings are simple and practical, providing a comfortable working environment.

2.2 Design Basis

●Environmental Protection Law of the People's Republic of China（December 1989)

●Comprehensive Wastewater Discharge Standards（GB8978-96）

● Guangdong Provincial Local Standard "Special Emission Limits for Water Pollutants"（DB44/26-2001）

●《Urban sewage recycling and utilizationIndustrial Water Quality（GB/T19923-2005）

●Design Specification for Outdoor DrainageGBJ14-87

●Design Specification for Power Supply and Distribution SystemGB50052-95

●Design Specification for Paper Pressure DistributionGB50054-95

●Code for Design of Building FoundationGBJ10-89

●Code for Seismic Design of BuildingsGBJ11-89

2.3 Design Scope

Only the equipment scope provided in the quotation is limited.

Design work for the process flow, selection of process equipment, structural layout of process equipment, and electrical control instructions of sewage engineering.

Construction, installation, and commissioning of steel-concrete structures and equipment for sewage treatment projects.

The power wiring of the sewage project is led by the owner to the distribution control box of the sewage treatment project, and our company is responsible for the distribution box to each electrical usage point.

2.4. Design water quantity, water quality, and governance objectives

（1）Design water volume

According to the information provided by the owner,According to the current production situation, the amount of various types of wastewater is as follows:

Note: Concentrated water (mother liquor) is not within the scope of treatment in this design.

（2）design water quality

（3) Governance objectives

Implementing the "Urban Sewage Recycling and Utilization" policy for reuse of waterIndustrial Water Quality（GB/T19923-2005）The table1 Standard requirements. as follows:

Internal circulating water is used for the cleaning process of the production line, and the water quality is treated according to the following agreed indicators. as follows:

Chapter Three Process Design

3.1 Process Requirements

In order to achieve efficient and stable operation of sewage treatment plants, save energy consumption and engineering investment, as well as the characteristics of wastewater, the sewage treatment process will be compared and selected based on the following design principles.

1 ) Based on the quality and quantity of the raw water, as well as the environmental capacity of the receiving water body, and taking into account the actual situation in the local area, through multiple technical and economic comparisons, priority is given to using low-energy consumption, low operating costs, low infrastructure costs, less land occupation, convenient operation and management, and mature sewage treatment processes.

2 ) The overall layout of the sewage station strives for compactness, reducing land occupation and investment.

3 ) The automatic control of sewage treatment process strives for safety, reliability, economy and practicality, improves management level, and reduces labor intensity.

3.2 Analysis of Processing Technology Route

Before plastic granulation, the cleaning wastewater from waste plastic sheets, plastic woven bags, plastic bottles, etc. is mostly suspended particulate pollutants with less solubility. Cleaning plastics requires a large amount of clean water, and the generated wastewater has the following characteristics:

Organic pollution: Waste plastics mainly come into contact with or are packaged in food, feed, beverages, etc.
PHValue pollution: Alkaline substances mainly added during the crushing and cleaning process of waste plastics.
Suspended solids pollution: Waste plastic agricultural film and greenhouse film mainly come into contact with or package chemical fiber soil dust, waste plastic particles, etc.
Oil pollution: waste plasticsPETBottles mainly come into contact with or package oily substances.

The pollution caused by different types and sources of waste plastics varies, mainly including the following:
Suspended solids pollution: Waste plastics mainly come into contact with or are packaged in cotton yarn, synthetic fibers, quartz sand, cement, calcium carbonate, etc.
Organic pollution: Waste plastics mainly come into contact with or are packaged in food, feed, beverages, etc.
Oil pollution: Waste plastics mainly come into contact with or have been packaged with oily substances.
Dissolved substance pollution: Waste plastics mainly come into contact with or are packaged with sodium chloride, soda ash, etc.
Color pollution: Waste plastics mainly come into contact with or are packaged with dyes, pigments, etc.
PHValue pollution: Waste plastics mainly come into contact with or are packaged with strong acidic and alkaline substances.
Microbial contamination: Waste plastics mainly come from disposable medical equipment.
Toxic substance pollution: Waste plastics mainly come into contact with or package toxic and harmful substances.

The water quality analysis results show that the alkaline washing wastewater has complex composition and high concentration (cumulative factor)B/Capproximately0.25It is a difficult to degrade organic compound, and even after physical and chemical treatment, it is still difficult to degrade. Under simple long-term aerobic treatment conditions, its molecular structure is difficult to be destroyed, and its biodegradation half-life is long. If applied to engineering, the investment is large and uneconomical.

So hydrolysis acidification is adopted+Biochemical treatment process for contact oxidation. In the hydrolysis and acidification stages, the main microorganisms are hydrolysis bacteria and acid producing bacteria, both of which are facultative bacteria. Therefore, the hydrolysis and acidification stages can be separated from the entire anaerobic process, and hydrolysis bacteria and acid producing bacteria can be used to degrade large molecules and difficult to degrade organic matter into small molecules, improve the biodegradability of wastewater, and create favorable conditions for subsequent treatment.

From an economic and processing perspective, we ultimately adopt“Microfiltration recycling+coagulation sedimentation+air flotation+hydrolytic acidification+Contact oxidation+Secondary precipitation”The processing technology.

3.3 Process Flow Diagram

Explanation: Deep processingROConcentrate the concentrated water and hand it over to qualified units for processing.

3.4 Process Introduction

The Yiteng microfiltration recycling machine adopts1520 micron pore filtration process, microporous filtration is a mechanical filtration method. It is suitable for maximizing the separation of tiny suspended substances in liquids, achieving the goal of separating solid and liquid phases. The difference between microfiltration and other methods is that the filter medium has particularly small gaps, and with the help of the centrifugal force generated by the rotation of the sieve mesh, it has higher flow velocity and can intercept suspended solids under lower hydraulic resistance.

This equipment is developed to address the issues of clogging, damage, heavy maintenance workload, and high secondary investment in existing microfiltration machines. It is one of the best practical technologies for fiber recovery and wastewater treatment in wastewater.

This device is widely used in various situations where solid-liquid separation is required. Filtration of urban domestic sewage, papermaking, textile, printing and dyeing, chemical wastewater, etc. Save the cost of sewage treatment.

A microfilter is a mechanical filtration device with a transmission mechanism The main components of the overflow weir water distributor, flushing water device, etc. are composed of stainless steel wire mesh for the filter structure and working principle. Its working principle is to enter the overflow weir water distributor from the water pipe mouth, and after a short period of stable flow, the treated water is evenly overflowed from the outlet and distributed on the filter screen of the rotating filter cartridge in the opposite direction. The water flow and the inner wall of the filter cartridge produce relative shear motion, resulting in high water efficiency and solid matter being intercepted and separated. Roll along the spiral guide plate inside the cylinder and discharge from the other end of the filter cartridge. The wastewater filtered out from the filter screen flows away from the water outlet directly below under the guidance of the protective covers on both sides of the filter cartridge. The filter cartridge of the machine is equipped with a flushing water pipe, which uses pressure water（Spray in a fan shape (3kg/cm2) to flush and unclog the filter screen, ensuring that the filter screen always maintains good filtration capacity.

The TWQF type high-efficiency air flotation adopts a new imported technology, which sucks in air and reflux water together through the pump inlet, and then cuts them into small dissolved water through the impeller of the pump. Under a certain pressure (0.35~0.45Mpa), an appropriate amount of air and some reflux water form a saturated dissolved gas carrier in the dissolved gas tank. The release device suddenly reduces the pressure to obtain a large number of fine bubbles, which quickly adhere to the flowing particles, emulsified oil, bath and flocculent bodies in the water, causing the flocculent body to have a specific gravity lower than that of water, and are forced to float rapidly on the water surface, thus achieving solid-liquid separation. Thus achieving the goal of purification. 

This type of air flotation overcomes the disadvantages of low dissolved air pressure and dissolved air rate required by the reflux water pump for general air flotation. It is a new and efficient air flotation that is trustworthy and optional for users.

Equipment Introduction:

Functional Features

1High efficiency of gas-liquid dissolution, fine bubbles ≤20Mm.

2Low pressure operation, high gas dissolution efficiency95%The gas release rate is as high as90%.

3The efficient absorption of microbubbles and suspended particles has been improvedSSThe removal effect.

4Dissolving efficiency of gas and water80-100%Higher efficiency than traditional dissolved air flotation3Twice.

5Long term stable performance, easy operation and maintenance, low noise.

6Multi layer sludge discharge ensures the effectiveness of water discharge.

7Automatic control and easy maintenance make it a truly "foolproof" processing system

Characteristics of Equipment Structure Composition

1. Air flotation equipment:

The air flotation equipment integrates water inflow, flocculation, separation, water collection, and outflow. Compared with traditional air flotation equipment, it adds a stable flow chamber, a dissolved air release chamber, and a cleaning device, making the treatment performance more stable and the effect more efficient. In addition, a cleaning device is added to regularly clean the sludge deposited at the bottom of the tank, reducing labor intensity.

Flocculation: Adopting folded plate flocculation, the wastewater with added flocculants and coagulants rolls up and down in the reaction folded plate, turbulent flow advances, expands the contact area between flocculants and wastewater, shortens flocculation time, and saves investment.

Dissolved air release chamber: The dissolved air release chamber and the separation chamber are located in the same tank, separated in the middle. The dissolved air water adheres to the flocculated raw water here, slowly rises, and enters the air flotation separation chamber, ensuring the contact space and time between the floc and the small bubbles, so that the release rate of dissolved air water reaches80% 100%.

Cleaning device: Traditional gas systems suffer from the sinking of floating slag, which accumulates at the bottom of the pool and affects the turbidity of the effluent.

Set up a cleaning device and install a cleaning bucket in the air flotation tank. During equipment maintenance, simply empty the water stored in the cleaning bucket and use the cleaning device to clean the entire air flotation tank wall. The sewage is discharged from the cleaning bucket, which solves the problem of difficult cleaning of the air flotation tank.

2. Dissolved gas system:

For air flotation equipment, the dissolved air system is like an air flotation equipmentThe heart is also the most important component of air flotation equipment. At this stage, gas and water are sucked in together at the inlet of the pump, and are cut into dissolved gas and water by the pump impeller. The maximum gas content of the entire dissolved gas system is 30%, and the solubility of the gas is 100%, making the distribution of microbubbles during gas dispersion uniform, with an average bubble diameter of less than 20 μ m.

The dissolved air system was developed by German experts based on the principle of air flotation and the outdated and cumbersome situation, seeking an economically reasonable solution to provide a guarantee for the technical advantages of the product.

The dissolved air water pump adopts an open impeller, which has no axial force when it is shut down for a long time or in critical operating conditions;

The dissolved air water pump adopts a guide vane to ensure good dynamic performance and high efficiency under operating conditions;

During the process of establishing pressure inside the dissolved gas pump, the gas-liquid phase is fully mixed and reaches saturation.

The overall structure of the dissolved gas system facilitates the optimal installation plan.

The flow rate and gas volume fluctuation of the entire dissolved gas system are very stable, providing conditions for the control of the air flotation process.

The gas water ratio of the entire dissolved gas system can be automatically adjusted to balance the gas water ratio and achieve the best condition of the dissolved gas system, making it a trueA 'foolproof' processing system.

Due to the above characteristics, the product not only improves its performance, but also reduces operating costs to a certain extent and improves the surrounding environment.

3. Scraper:

Slag scraperasThe air flotation systemSlag discharge equipment, whichThe quality of air flotation effluent and the solid content of sludge are directly affected by its advantages and disadvantages.

IAccording to different air flotation equipment, different scrapers are equippedSlag machineTo improve the efficiency of slag scraping. scrapeSlag machineThere are mainly chainsScraper scraperDriving style scrapingSlag machineThere are two options, we choose based on the type of wastewater being treated and the size of the air flotation.

Slag scraperThe principle of selection：

● Stable and reliable operation;

● Automatic operation, the operating mode can be set according to time or sludge concentration;

● Slowly flip to minimize disturbance to the mud layer;

●The scraper height can be adjusted to better adapt to various operating conditions and reduce the moisture content of sludge.

4. Control system:

control systemMedication is linked with inflow, andelectrical componentsalladoptChint, Siemens, etcTo ensure the long-term effective operation of the equipment.

5. Supporting equipment:

Air flotation agents and dosing equipmentSelect different chemicals and equipment based on the type of wastewater.If special requirements are needed,our companycompatibleProvide dosing equipment.If suitable coagulants, demulsifiers or decolorizers are selected, our company can provide matching solutions for users.

Main technical parameters

1. Flocculation tank: using folded plate flocculation, reaction time: 2-3 minutes

2. Air flotation tank: Particle floating speed: 4-9m/h, residence time

3. Effective water depth: Horizontal flow is generally around 2 meters; Vertical flow is generally around 4-5m

4. Return water: sewage ≥ 30%; Purified water ≥ 10%

Processing effect

Note: Due to the variability of wastewater properties and varying treatment conditions, the above data is for reference only.

After coagulation sedimentation and air flotation treatment,2/3 of the wastewater is directly reused, and 1/3 of the wastewater is subjected to biochemical treatment. Biochemical treatment includes two parts: hydrolysis acidification and contact oxidation.

1. hydrolytic acidification

Anaerobic biochemical treatment of wastewater is a complex biochemical process that relies on the combined action of three major groups of bacteria to complete the complex anaerobic biochemical process. This complete process can be roughly divided intoThree consecutive stages, namely hydrolysis and acidification stage, hydrogen production and acetic acid production stage, and methane production stage.

Hydrolysis and acidification are two processes controlled throughout the anaerobic process. The use of hydrolysis tanks has the following advantages over anaerobic tanks (digestion tanks) throughout the entire process.

（1）Under the action of extracellular enzymes from hydrolytic bacteria, insoluble organic matter is hydrolyzed into soluble substances. With the synergistic action of acid producing bacteria, large molecular substances and difficult to degrade substances are converted into small molecular substances that are easy to biodegrade. Therefore, hydrolysis tanks can change the biodegradability of raw wastewater, thereby reducing reaction time and treatment energy consumption.

（2）The degradation of solid organic matter can reduce the amount of sludge, and its function is the same as that of a digestion tank. The process only produces a small amount of biologically active sludge that is difficult to anaerobically degrade, thus achieving one-time treatment of sewage and sludge without the need for a frequently heated medium temperature digestion tank.

（3）No need for a sealed pool, no need for a three-phase separator of water, gas, and solid, reducing costs and facilitating maintenance. Due to these characteristics, structures suitable for large, medium, and small sewage treatment plants can be designed.

（4）The reaction is controlled until the second stage is completed, and the effluent has no adverse odor of anaerobic fermentation, improving the environment of the treatment plant.

（5）Fully utilizing the short generation cycle and rapid reaction of acid producing bacteria through hydrolysis, the hydrolysis tank has a small volume, comparable to the initial sedimentation tank, saving infrastructure investment.

2、Contact oxidation

The contact oxidation tank is a biological treatment device that mainly uses biofilm method and also has activated sludge method. It provides oxygen source through a fan to fully contact the organic matter in the sewage with the biofilm in the tank. Through microbial adsorption and degradation, the water quality is purified. Two thirds of the effluent from the contact oxidation tank returns to the sewage collection tank, which is lifted by the sewage pump and enters the anoxic tank to complete denitrification and denitrification. One third flows into the secondary sedimentation tank to remove the peeled biofilm and activated sludge, and is separated into sludge and water by the secondary sedimentation tank.

As the frequency of reuse in the workshop increases, the removal rate of inorganic salts in water is very low due to physicochemical and biochemical treatment processes. Circulating water (recycled water) accumulates a large amount of inorganic salts, which can have an impact on production, cleaning procedures, and the entire wastewater treatment process.Conventional activated sludge biochemical treatment technology is widely used in sewage purification and treatment due to its economy and high efficiency. However, as the salt content increases, it inhibits the growth and reproduction of microorganisms, and too high a concentration can even kill microorganisms. The resistance of different substances to biological treatment may be due to their impact on the respiratory and enzyme systems of microorganisms, or they may be caused by the disruption of osmotic pressure balance. The resistance of various salts to biological treatment varies depending on their salt osmotic pressure; When conditions such as pH, temperature, and sludge concentration of the same substance change, the allowable concentration may also vary. This article studies some common inorganic salts in wastewaterThe inhibitory effect of (NaCl, Na2SO4) on conventional activated sludge biochemical treatment methods, identifying general patterns, and providing reference for the engineering application of conventional activated sludge treatment of saline industrial wastewater.

Therefore, after traditional physicochemical and biochemical treatment, a set of advanced treatment facilities should be added to further remove inorganic salts from the water, in order to achieve a virtuous cycle in the entire wastewater treatment.

Through on-site sampling and testing of the sewage treatment system, it was found that the conductivity of the treated sewage is relatively high. Significantly higher than the requirements for finished water in this project, therefore, desalination treatment must be carried out. Due to the higher electrical conductivity of sewage720～750μs/cm， Only by using reverse osmosis equipment for desalination treatment can ideal technical and economic benefits be achieved. The deep processing process is as follows:

Processed wastewater 原水箱 raw water pump sand filter

reverse osmosis device high-pressure pump Security filter Activated carbon filter

pure water tank

Chapter Four Newly added design parameters for major structures

4.1. Regulating pool

make, do, create, compose, write, etc. Usage: Storage, homogenization of wastewater

place reason Quantity:62.5m ³/h

Effective water depth: 3.3m

Effective volume:297m³

rule Grid: 7.50m×12.0m×3.5m

number quantity: 2 seats

knot constituteSteel concrete

auxiliary equipment

1. Lift the pump

number Quantity:2 units

flow Quantity:Q=100.0m³/h

Yang Cheng:H=15m

merit Rate:N=7.5KW

2. Liquid level controller

number Quantity:1 unit

3. Stainless steel mechanical grille

type number:YTA-SF130

number quantity: 1 set

material Quality: Stainless steelSUS304

4.2 microfiltration recycling machine

make, do, create, compose, write, etc. Use: Separate the tiny suspended substances present in the liquid to achieve the goal of separating solid and liquid phases

place reason Quantity:85.0m³/h

type number:ETECHW-125L

number quantity: 1 building

total merit Rate:1.1KW

4.3 Wastewater Reaction and Sedimentation Tank

A. Reaction tank

make, do, create, compose, write, etc. Usage: dosing reaction, coagulation reaction, flocculation reaction

place reason Quantity:35.0m³/h

Effective water depth:2.5m

rule Grid:1.50m×2.50m×2.8m

number quantity: 6 seats

knot constituteSteel concrete structure

auxiliary equipment

1. PH controller

type number:PC-300

number quantity: 2 sets

2. Medication pump

number Quantity:6 units

flow Quantity:Q=1000L/h

Yang Cheng:H=10m

merit Rate:N=0.25KW

3. Blender

type number:YTD60，2.2KW

number Quantity:2 units

B. Sedimentation tank

make, do, create, compose, write, etc. Used: YeswastewaterSeparation of sludge and water after dosing reaction

place reason Quantity:35.0m³/h

rule Grid:8.0m×9.0m×4.5m

number quantity: 2 seats

knot constituteSteel concrete structure

shape Formula: Vertical flow sedimentation

auxiliary equipment

1. Vertical flow reactor

type number:YT-750

number quantity: 2 sets

4.4 Air flotation processors

make, do, create, compose, write, etc. Use: Air flotation generates a large number of fine bubbles, which quickly adhere to flowing particles, emulsified oil, bath materials, and flocs that have undergone coagulation reactions in water, causing flocs to have a lower density than water and be forced to float rapidly on the water surface, thereby achieving solid-liquid separation. Thus achieving the purpose of purification

place reason Quantity:40.0m³/h

type number:TWQF-40

rule Grid:2.8m（B）×7.5m（L）×2.1m（H）

number quantity: 2 sets

total merit Rate:5.5KW

knot constituteSteel structure+anti-corrosion paint

auxiliary equipment

1. Automatic scraper

type number:TWQF-G

number quantity: 1 set

2. Medication pump

number Quantity:1 unit

merit Rate:N=0.05KW

3. Support

number Quantity:1 unit

knot constituteSteel concrete structure

4.5 Reusable Water Pools

make, do, create, compose, write, etc. Use: Storage, transit

rule Grid:4.0m（B）×15.3m（L）×3.5m（H）

number quantity: 1 building

knot constituteSteel concrete structure

4.6 Biochemical treatment tank

A. Hydrolysis acidification tank

place reason Quantity:21.0m³/h

rule Grid:3.30m×8.00m×4.00m

number quantity: 2 seats

knot constituteSteel concrete structure

auxiliary equipment

1. Combination packing and support

type number:D150

number quantity: 1 set

2. Aeration pipe

type number:D50

number quantity: 1 set

B. Contact oxidation tank

place reason Quantity:21.0m³/h

rule Grid:4.10m×8.00m×4.00m

number quantity: 2 seats

knot constitute: Steel structure

auxiliary equipment

1. Combination packing and support

type number:D150

number quantity: 1 set

2. Micro porous aerator

type number:D215

number quantity: 135 sets

4.7 Secondary sedimentation tank

A. Reaction tank

make, do, create, compose, write, etc. Usage: dosing reaction, coagulation reaction, flocculation reaction

place reason Quantity:21.0m³/h

rule Grid:1.50m×1.50m×4.0m

number quantity: 1 building

knot constituteSteel concrete structure

auxiliary equipment

1. PH controller

type number:PC-300

number quantity: 1 set

2. Medication pump

number Quantity:6 units

type number:EXB-130

flow Quantity:Q=130L/h

Yang Cheng:H=10m

merit Rate:N=0.05KW

B. Sedimentation tank

make, do, create, compose, write, etc. Used: YeswastewaterSeparation of sludge and water after dosing reaction

place reason Quantity:21.0m³/h

rule Grid:5.0m×10.0m×4.0m

number quantity: 1 building

knot constituteSteel concrete structure

shape Formula: inclined plate precipitation

auxiliary equipment

1. Honeycomb inclined plate and bracket

type number:YT-50

number quantity: 1 set

2. Sludge reflux pump

number Quantity:2 units

flow Quantity:Q=20.0m³/h

Yang Cheng:H=15m

merit Rate:N=1.5KW

4.8 PH adjustment tank

make, do, create, compose, write, etc. Use: callbackPH

place reason Quantity:21.0m³/h

rule Grid:2.50m×5.00m×4.00m

number quantity: 1 building

knot constituteSteel concrete structure

auxiliary equipment

1. PH controller

type number:PC-300

number quantity: 1 set

2. Medication pump

number Quantity:1 unit

type number:EXB-130

flow Quantity:Q=130L/h

Yang Cheng:H=10m

merit Rate:N=0.05Kw

4.9 Sludge tank

make, do, create, compose, write, etc. Usage: Sludge storage and concentration

rule Grid: 8.30m×2.70m×3.50m

number quantity: 1 building

knot constituteUnderground steel-concrete structure

auxiliary equipment

1. Pneumatic diaphragm pump

type number:EVA-65

number quantity: 2 sets

2. Plate and frame filter press

type number:30 square meters

number quantity: 2 sets

3. Air compressor

type number:11KW

number quantity: 1 set

4.10 Equipment Rooms

rule Grid:10.0m×8.0m×3.80m

knot constitute: Framework structure

auxiliary equipment

1. Electric control cabinet

type number:YT-AUTO20

number quantity: 1 set

2. Roots blower

type number:D65

number quantity: 2 sets

merit Rate:4.0KW

4.11 Deep Processing System

1. Raw water booster pump

quantity1 unit

SpecificationsQ＝30m³/h H＝38m

Overcurrent material: stainless steel

2. Mechanical filter

type number:φ1800×3200

Type: Pressure type

quantity2 units (two-stage filtration)

filter mediaQuartz sand

3. Activated carbon filter

Model:φ1800×3200

Type: Pressure type

quantity1 unit

filter mediaActivated carbon

3. Ultrafiltration device UF

Model:YTUF-M20

Water production:15.0m³/h

4.reverse osmosis deviceRO

Model:YTRO-030

Water production:8.0m³/h

Desalination rate:98%

Chapter Five Power distribution and automatic control

5.1 Design scope

The power distribution design includes low-voltage power distribution and automatic control within the boundary of the wastewater treatment station.

5.2 Power supply and electrical load

The newly added system of the wastewater treatment station is equipped with a power supply(Provided by the property owner)，～380/220V，50HZ，The distribution system adopts a three-phase five wire system，single-phase three-wire system，The grounding protection system isTN-SSystem.

5.3 Cable and laying

Selection of power cablesVVtype, VV22type,Selection of control cablesKVVtype, KVVPtype,Lighting selectionBVVtype,The laying method adopts a combination of cable trench and concealed conduit installation,Indoor lighting uses fire-resistant plastic trunking for exposed installation.

5.4 lightning protection grounding

Using lightning protection tape,Short lightning rods provide lightning protection for buildings. Using natural grounding bodies combined with artificial grounding electrodes as grounding electrodes,The working grounding and protective grounding share a set of grounding electrodes.

Chapter Six operating cost

6.1 Operating costs (for reference only)

The daily amount of wastewater treated is1500 cubic meters, equivalent to an additional daily operating and processing cost of approximately 1.75 yuan/m³(Excluding depreciation expenses for facilities and equipment).

Chapter Seven Engineering Estimation

7.1 Process equipment, electrical and materials

7.2 Civil engineering section (consisting ofOwners are responsible for

Note: Excluding basic processing fees.

7.3 Total estimate