Rural small-scale domestic sewage treatment - underground integrated wastewater treatment equipment, sewage treatment integrated complete set of equipment

Rural small-scale domestic sewage treatment - underground integrated wastewater treatment equipment

Integrated treatment equipment for domestic sewageDomestic sewage is the water discharged from people's daily lives. It is water discharged from living facilities such as kitchens, toilets, bathrooms, and laundry rooms in households, public facilities (restaurants, hotels, theaters, sports venues, offices, schools, and shops), and factories.

1、 Analysis of Domestic Sewage Content

1. Chemical Oxygen Demand (COD) refers to the amount of oxidant consumed when treating water samples with strong oxidants under certain conditions, expressed in milligrams per liter of oxygen. Chemical oxygen demand reflects the degree of pollution caused by reducing substances in water.

2. Five day biochemical oxygen demand (BOD) refers to the amount of dissolved oxygen consumed by microorganisms during the biochemical process of decomposing certain oxidizable substances, especially organic matter, present in water under specified conditions. The five-day biochemical oxygen demand reflects the content of biodegradable organic matter in water.

3. Suspended solids (SS) refer to the total unfiltered residue dried at 103-105 ℃. The presence of suspended solids in water can cause turbidity, reduce transparency, and affect the respiration and metabolism of aquatic organisms. In water and wastewater treatment, measuring suspended solids has specific significance.

4. Total nitrogen (NT), when a certain amount of nitrogen is present in water, can cause vigorous reproduction of planktonic organisms and result in a state of eutrophication. Therefore, total nitrogen is one of the important indicators for measuring water quality.

5. Ammonia nitrogen (NH3-N) exists in water in the form of free ammonia or salt. The main source of ammonia nitrogen in water is the decomposition products of nitrogen-containing organic matter in domestic sewage by microorganisms. Measuring the ammonia nitrogen content in water can help evaluate the pollution and self purification status of water bodies.

6. Total phosphorus (PT), phosphorus is one of the essential elements for biological growth, but excessive phosphorus content in water can cause overgrowth of algae and lead to eutrophication of the water.

IIDesign Principles

1. Combine clean production, pollution source management, sewage standard treatment, and total control to propose a practical and feasible engineering design system.

2. Based on the production and wastewater quality of the company, a wastewater treatment process with reliable technology, stable heat generation, high treatment efficiency, and low operating costs is selected to ensure that the effluent meets the discharge standards.

3. Select integrated processing equipment with reliable quality, easy maintenance, low energy consumption, and high cost-effectiveness to minimize system operating costs as much as possible

4. Fully consider the situation of the wastewater treatment plant and strive to reduce the discharge of sludge in the treatment process

Rural small-scale domestic sewage treatment - underground integrated wastewater treatment equipment

3、 Equipment composition

1) Grille: Two artificial grid markers are installed before the production wastewater enters the pre aeration regulating tank to remove large suspended solids, animal fur, and some animal and vegetable oils, in order to avoid pump and pipeline blockages, reduce subsequent treatment loads, and ensure that subsequent treatment proceeds smoothly.

2) Due to the large amount of oil and fat in the raw water, pre-treatment is necessary for the air flotation tank to reduce the pressure of subsequent treatment and ensure the treatment effect. The air flotation method can effectively remove small particle size oil droplets and emulsified oil, with significant oil removal efficiency.

3) Due to the strong variability of raw water flow rate and discharge time, regulating tanks are set up to balance the quality and quantity of raw water, reduce the impact on subsequent projects, and achieve treatment effects. Simultaneously possessing the function of partial hydrolysis.

4) The hydrolysis acidification process in the hydrolysis acidification tank is the preliminary stage of anaerobic processes, which functions to degrade organic macromolecules such as oil, fat, and protein into organic low molecular weight substances. Easy for aerobic process treatment.

5) TheIntegrated treatment equipment for domestic sewageIt is a new type of product with obvious characteristics and outstanding advantages in China's integrated processing equipment: consisting of a composite tank body, an underwater aeration system, and an electronic control system. The sewage in the composite tank comes into full contact with the oxygen and activated sludge introduced by the aeration system, and undergoes biochemical degradation treatment. The degraded activated sludge enters the sedimentation tank through the concave groove at the bottom of the biochemical tank for sedimentation, and the treated sewage meets the discharge standards.

4、 Equipment features

1) Fast processing speed: The dwell time inside the machine is ≤ 3 minutes

2) Small overall area: 100m3/H occupies ≤ 25m2

3) Energy saving: Electricity consumption per ton of water treatment ≤ 1.5Kw

4) High floating degree of effluent: SS removal rate>90%; removal viscosity>99%

5) High drying degree of sludge discharge: solid content ≥ 20%

6) Low noise:<60 decibels

7) No need for backwashing, stable and reliable automatic operation.

8) It can greatly save the maintenance and upkeep costs of domestic sewage treatment equipment, as well as various expenses such as technical personnel and operators.

9) It can replace air flotation or sedimentation tanks in water treatment projects and is a revolutionary alternative to traditional treatment methods

5、 Basic requirements

1. Equipment welding manufacturing requirements refer to JB2932-99 "Technical Conditions for Manufacturing Water Treatment Equipment";

2. The pipeline is connected to the main body using flanges, taking into account the convenience of maintenance and component replacement; The materials of the internal components comply with the specified requirements, and the fasteners meet the anti-corrosion requirements.

3. The internal components are fixed and reinforced to withstand the impact of water flow.

4. The internal devices, fittings, components, etc. of the container should be installed and fixed inside the container before shipment to prevent missing parts and damage or loss during transportation.

5. The epoxy anti-corrosion material used internally has a coating with good corrosion resistance and wear resistance, ensuring that the coating will not peel off during the service life.

6. The material requirements for domestic wastewater treatment equipment must be suitable for the water quality and have a long service life.