The principle of sewage treatment biochemical tank

The principle of sewage treatment biochemical tank

The principle of sewage treatment biochemical tank——Equipment Introduction

After extensive practical testing,A／OThe process can achieve good treatment effects on domestic sewage, including its excellent nitrogen and phosphorus removal efficiency.

A/OThe integrated domestic sewage treatment device is a sewage treatment device that combines anoxic and aerobic sections into a whole. If a sedimentation tank is combined to function as a secondary sedimentation tank, the effluent quality can be further improved. Its main features are:(1)Less land occupation, low operating costs, and easy management;(2)Resistant to impact loads and with good effluent quality;(3)The effluent can be refluxed to the reactor inlet to form“Pre denitrification biological nitrogen removal system”Achieve good denitrification effect;(4)The processing capacity is relatively limited, and it is mostly suitable for small and medium-sized sewage treatment.

The principle of sewage treatment biochemical tank——A/OProcess description:

Also known as anaerobic aerobic process. In addition to removing organic pollutants from wastewater, it can also simultaneously remove nitrogen and phosphorus, especially for high concentrations

Setting a hydrolysis acidification section before the aerobic section can significantly improve the biodegradability of organic wastewater and refractory wastewater.

A2/OLaw:

The biological nitrogen and phosphorus removal process is a combination of traditional activated sludge process, biological nitrification and denitrification process, and biological phosphorus removal process. The processing efficiency of this equipment can generally reach:BOD5andSSfor90%~95%The total nitrogen is70%Above, phosphorus

for90%Left and right, generally suitable for large and medium-sized urban sewage treatment plants that require nitrogen and phosphorus removal. butA2/OThe infrastructure and operating costs of the process are both

Compared to the ordinary activated sludge process, the operation and management requirements are higher. Therefore, for the current situation in China, when the treated sewage is discharged into a closed system

This process is only used when eutrophication is caused by slow-moving or slow-moving water bodies, which affects the water supply source.

The principle of sewage treatment biochemical tank——The composition of the equipment.

Regulating pool:WSZ-AOThe series adjustment time is6Hour.

Hypoxia pool:WSZ-AOThe residence time of sewage in the series anoxic tank in the tank is ≥ 2Hour, the filler is an elastic three-dimensional filler, with a specific surface area of200m2/m3.

Aerobic tank:WSZ-AOThe series of biological contact oxidizes him, and the residence time of sewage in the pool is6-8Hour, the filler is an elastic three-dimensional filler, with a specific surface area of200m2/m3.

Secondary sedimentation tank:WSZ-AOThe series of secondary sedimentation tanks are cyclone sedimentation tanks with a surface load of1.0m3/The sedimentation time is ≥2Hour.

Disinfection pool:WSZ-AOThe series of disinfection tanks are cyclone reaction tanks, and the total residence time of sewage in the tank is30About minutes, hospital sewage1More than hours.

Sludge tank:WSZ-AOThe sum of the capacity of the sludge hopper in the series sludge tank and primary sedimentation tank can be stored90The sewage sludge can be pumped out by a suction truck from the inlet of the sludge tank to the bottom of the tank, and then transported outside.

The principle of sewage treatment biochemical tank——The function of anoxic pool

Decompose suspended particles and impurities in sewage into soluble organic matter, and decompose large molecular organic matter into small molecular organic matter. In this process, the hydrolysis tank adopts advanced upward flow and a thick sludge bed area at the bottom. Sewage enters from the bottom of the hydrolysis tank, and when passing through the bottom sludge bed, the microorganisms in it quickly intercept and adsorb a large amount of particulate matter, colloidal matter, and organic matter. This is a rapid reaction of a physical process that generally only takes a few seconds to tens of seconds to complete. The intercepted substances adsorb on the surface of hydrolyzed sludge and are slowly decomposed and metabolized. Their residence time in the system is much longer than the hydraulic retention time of sewage, so anaerobic tanks have super strong organic matter removal ability.

In order to enhance the effectiveness of the anaerobic tank, a three-dimensional elastic packing material is installed in the hydrolysis tank, which is rich in hydrolysis bacteria and has the advantages of hardness, softness, and semi softness. Compared with rigid honeycomb packing, this filler has a greater variability in pore size and is not clogged;Compared with soft fillers, the material has a longer lifespan and does not adhere or clump together;Compared with semi soft fillers, it has a larger specific surface area and faster film formation.

The principle of sewage treatment biochemical tank——Characteristics of aerator:
1The membrane is made of fully imported material(EPDM)
2The low resistance diaphragm can be easily opened
3Large aeration service area
4Smooth and detached sludge
5The aeration membrane has sufficient extension capacity
6Mechanical assembly has good sealing performance around the perimeter
7The overall strength is sturdy and the service life is long

The principle of sewage treatment biochemical tank——sedimentation tank

Purpose of setting: To perform solid-liquid separation to remove the biofilm and suspended sludge peeled off from the biochemical tank, so as to truly purify the sewage.

Design feature: Designed as a vertical flow sedimentation tank, it has good sludge degradation effect. Adopting a triangular weir to ensure stable water discharge efficiency. The sludge is discharged to the sludge tank at regular intervals using an air stripping method, and a sludge air stripping reflux device is installed. Part of the sludge is refluxed toAThe level biological treatment tank for nitrification and denitrification also reduces the generation of sludge and facilitates the removal of ammonia nitrogen from wastewater.

The pool is designed as a steel structure box.

The principle of sewage treatment biochemical tank——Product Features

1Collection processingBOD5TheCODTheNH3-NFecal Escherichia coliPHIn one body
2The entire equipment can be buried underground and does not occupy surface area;
3The generated voice is low, the odor is minimal, and the impact on the surrounding environment is minimal
4High degree of purification and low sludge production in the entire system;
5High degree of automation, convenient management, no need for dedicated personnel to manage;
6Stable technology and easy maintenance
7Low energy consumption, saving operating costs
The above are the characteristics of the domestic sewage treatment equipment provided by our company. We welcome people from all walks of life to come to our company for consultation and business negotiation.