WSZ buried domestic sewage treatment device

WSZ buried domestic sewage treatment device——Equipment production standards

1. Technical Conditions for High Quality Carbon Steel StructuresGB899-1988；

2. Corrosion and Derusting Grades of Steel Surface before CoatingGB/T8923-1998；

3. Container Painting, Packaging, and Transportation "refers to" Pressure Vessel Painting, Packaging, and Transportation "JB2536-1980；

4. Welding Standards for Steel Structural ComponentsJB2880-81；

5. Flange Manufacturing StandardGB119-2004.

WSZ buried domestic sewage treatment device——Basic structure:

It is composed of anti-corrosion treated components made of fiberglass or carbon steel. The equipment is equipped with underwater aeration, which is driven by water flow to form dual function aeration. When treating domestic sewage, it flows into the aeration zone from the top of the device. The aerator aerates underwater and pushes the flow to stir the domestic sewage. The incoming domestic sewage quickly mixes with the original mixture, adapting to changes in the incoming water quality to the greatest extent possible. The aerator has dual functions of water flow propulsion and underwater aeration, allowing the sewage in the aeration zone to circulate regularly and increase the dissolved oxygen content in the sewage. Due to the continuous circulation and flow of domestic sewage in the aeration zone, the water quality at each point in the zone is relatively uniform, and the number and properties of microorganisms are basically the same. Therefore, the working conditions of each part of the aeration zone are almost the same, which controls the entire biochemical reaction under good and uniform conditions. Organic matter is gradually degraded by microorganisms, and the sewage is purified.
WH-SHIntegrated domestic sewage treatment equipment (patent number:.0）Characterized by high removal efficiency,CODThe removal rate can reach80%～90%All indicators of effluent meet the national "Pollutant Discharge Standards for Urban Sewage Treatment Plants"(GB 18918—2002)Level 2 or Level 1(B)Standard, capable of meeting emission standards. At present, further support can be provided according to customer requirements for ozone strong oxidation deep treatment, meeting the "Water Quality Standards for Landscape Environment Water Use in Urban Sewage Recycling and Utilization"(GB/T 18921—2002)Standard, recycling.

WSZ buried domestic sewage treatment device——Contact oxidation tank(Underground steel structure)

Multi stage biological contact oxidation is used to digest and remove residual organic carbides. The main process is mechanical air blowing oxygenation biological contact oxidation treatment technology. The suspended substances in the sewage are intercepted by suspended packing in the tank, and the colloidal substances in the sewage are adsorbed on its surface. The organic matter in it enables microorganisms to rapidly reproduce under conditions of sufficient oxygen, while these microorganisms further adsorb suspended solids colloids and dissolved substances in the sewage, gradually forming a biofilm. The sewage is purified through the adsorption, oxidation, and flocculation of the biofilm.

The biological contact oxidation method is an efficient water treatment process, and the filler is the core part of the process. The influence of filler on oxygenation performance directly affects the selection of filler type, treatment effect, infrastructure investment, and energy consumption. Our factory isAGrade andOAll level biochemical tanks are set upYDTA type of elastic three-dimensional filler, which has a radial elastic wire structure, can continuously subject the gas water mixed fluid to severe collision cutting action, cutting large bubbles into small bubbles and accelerating the oxygen transfer rate from the surface. In addition, the elastic filaments of the filler have a good adsorption effect on bubbles, allowing numerous small bubbles to adsorb onto them, prolonging the contact time between gas and water, and increasing the transfer of oxygen. According to scientific experiments conducted by Beijing University of Technology on seven types of fillers in China, it is believed that the filler is Okay, at the same time, this filler has the advantages of long service life, large specific surface area, easy film formation and detachment, and no clumping or blockage.

The total residence time of the two-stage biochemical tank design4For hours or more, the pool is filled with elastic three-dimensional packing material for the growth of aerobic microorganisms; Micro porous aerator provides a growth site and oxygen source for aerobic microorganisms. The gas water ratio is12：1about

WSZ buried domestic sewage treatment device——Cultivation of biofilm

1Sewage enters the equipment;

2Start the fan and reduce the oxygen charge to about half of the normal oxygen charge;

3Observe the packing situation in the aerobic tank every day. If there is a sticky layer of orange yellow or orange black on the packing, it indicates that the biofilm has been cultured. The cultivation interval usually takes one week to complete;

4The temperature is generally in Celsius15℃- 25℃ For suitability;

5If the concentration of the original sewage is too low and the cultivation time of the biofilm is too long, it is necessary to add some nutrients, mainly feces or other substances, if necessary;

6、PHThe value must be guaranteed to be within6.5 - 8.5Between them, the original sewage should be ensured to reach a biodegradable state;

7Before starting the debugging process for industrial and hospital wastewater treatment, domestic wastewater should be the main source. After the biofilm is cultured, a small amount of other industrial wastewater should be continuously introduced to allow the biofilm to adapt to the growth of industrial wastewater, thus starting the debugging process normally.

WSZ buried domestic sewage treatment device——Hydrolysis acidification tank(Underground steel structure)

This pool utilizes facultative microorganisms in nature, which are abundant and reproduce rapidly. It can decompose high molecular weight biodegradable organic compounds into small molecule organic compounds, such as polysaccharides into monosaccharides or organic acids, proteins into amino acids, and fatty substances into fatty acids and glycerol. Degradation of difficult to biodegrade organic matter into biodegradable organic matter improves the biodegradability of wastewater and reduces the organic load on subsequent aerobic stages. The main equipment is elastic packing to maintain facultative biological bacteria. The primary function of the hydrolysis tank is denitrification; Next is the release of phosphorus from sludge. Ammonia nitrogen is converted into nitrate by nitrifying bacteria attached to the packing material. Nitrification is a two-step process that utilizes two types of microorganisms, namely nitrite bacteria and nitrate bacteria. The first step is to convert ammonia nitrogen into nitrite, which is first converted into nitrite by nitrite bacteria. Nitrite producing bacteria include the genera Nitrosomonas, Nitrosomonas, and Nitrococcus. The conversion of nitrite to nitrate is accomplished by nitrate bacteria, which are also composed of the genera Bacteroides, Spirogyra, and Streptococcus. Nitrite bacteria and nitrate bacteria are collectively referred to as nitrifying bacteria. Nitrifying bacteria are specialized autotrophic Gram negative aerobic bacteria that utilize the energy released during the conversion of ammonia nitrogen as their own metabolic energy source.

WSZ buried domestic sewage treatment device——Selection of filling materials for buried integrated sewage treatment equipment

Filler is crucial for underground integrated sewage treatment equipment, and can be said to be the core of sewage treatment equipment. Most of the biological bacteria need to adhere to the surface of the filler to produce and reproduce. The hanging density and model selection have a decisive effect on the treatment effect. Below are two new types of composite biological fillers.

JHY-IType filling material

This filler is selected from high-quality materialsPVCA new type of wave bending filler made with spacing between fillers30mmSpecific surface area400m2/m3Above, it is not blocked, with ripples on the surface and easy to hang film.

This filler has the advantages of light weight, reasonable installation, uniform water distribution after assembly, and no dead corners, which is conducive to the growth of biofilm and improves biomass and biological activity.

JHY-IIType filling material

The filler is composed of specially made plastic and resin, with a scientific and innovative structure and a specific surface area of the filler1000 m2/m3, light weight0.97g/cm3,Not clogged, easy to hang film.

This packing material is a spherical packing material composed of fiber spheres, network shells, and perforated columns. It only needs to be directly added, does not need to be fixed, and has good removal efficiency for difficult to degrade substances. It has high removal efficiency for nitrogen, phosphorus, and sulfides, and no residual sludge is generated.