Daily price of 20 tons of sewage treatment equipment

Daily price of 20 tons of sewage treatment equipment——Third level processing instructions

Primary treatment mainly removes suspended solid pollutants in sewage, and most physical treatment methods can only meet the requirements of primary treatment. The sewage that has undergone primary treatment,BODGenerally removable30%Left and right, unable to meet emission standards. The first level processing belongs to the preprocessing of the second level processing.
Secondary treatment mainly removes organic pollutants in colloidal and dissolved states from wastewater（BOD，CODMaterial), with a removal rate of up to90%Above, meet the emission standards for organic pollutants.
Third level treatment, further processing of recalcitrant organic matter, nitrogen, phosphorus, and other soluble inorganic substances that can lead to eutrophication of water bodies. The main methods include biological nitrogen and phosphorus removal, coagulation precipitation, sand filtration, activated carbon adsorption, ion exchange, and electroosmotic analysis.

The entire process involves the raw sewage passing through a coarse grid, being lifted by a sewage lift pump, then passing through a grid or sand filter, and finally entering a sedimentation tank. The sewage separated by sand and water enters the primary sedimentation tank, which is the first level treatment (i.e. physical treatment). The effluent from the primary sedimentation tank enters biological treatment equipment, including activated sludge and biofilm processes (the reactor of the activated sludge process includes aeration tanks, oxidation ditches, etc., while the biofilm process includes biological filters, biological turntables, biological contact oxidation, and biological fluidized beds). The effluent from the biological treatment equipment enters the secondary sedimentation tank, where it is disinfected and discharged or enters the third level treatment. The first level treatment ends at this point, which is the second level treatment. The third level treatment includes biological denitrification and phosphorus removal. Coagulation precipitation method, sand filtration method, activated carbon adsorption method, ion exchange method, and electrodialysis method. Part of the sludge from the secondary sedimentation tank flows back to the primary sedimentation tank or biological treatment equipment, while another part enters the sludge concentration tank and then enters the sludge digestion tank. After passing through dewatering and drying equipment, the sludge is reused.

Daily price of 20 tons of sewage treatment equipment——Main characteristics of buried sewage treatment equipment
1.System buried integrated sewage biochemical treatment device, does not occupy ground area, and the ground can be greened or reused
2.Set up a biological selection zone, which has a strong driving force for biochemical reactions and strong impact resistance
3.Equipped with synchronous enhanced denitrification and phosphorus removal functions, the denitrification effect is significant
4.Continuous inflow and outflow at a constant water level reduces disturbance to the sludge layer and improves equipment utilization
5.Fixed collection pipe type decanting device with low machine failure rate
6.usePLCSelf control, achieving automatic operation of the system by setting operating parameters
7.Without increasing the salt content in the water, the reclaimed water can be reused for car washing, toilet flushing, greening and land irrigation
8.Cost saving operation

9.Secondary pollution without odor and noise

Daily price of 20 tons of sewage treatment equipment——Main process description:

Hydrolysis acidification unit

Effective time adjustment:2hour

Biological phosphorus removal is mainly achieved through the suppression of specific aerobic non motile bacteria under anaerobic conditions,Using polyphosphates in bacterial cells as energy source,Absorb organic matter into cells, transform and store it,Simultaneously decompose polyphosphates in the body into soluble phosphates and excrete them from the body,Non motile bacteria released through anaerobic suppression,Has strong phosphorus absorption ability under aerobic conditions,Absorb and convert phosphates in wastewater into polyphosphates for storage in the body.The more phosphorus is released under anaerobic conditions,The more it is absorbed under aerobic conditions,Utilize the excess sludge to achieve the goal of removing phosphorus from wastewater.

Secondary contact aerobic unit

Volume load:0.80-1.5KgBOD5/m3?d

Gas water ratio: 15：1

Total dwell time:8hour

The contact oxidation stage should mainly meet the oxygen demand of aerobic microorganisms for removing carbon sourcesBODAnd nitrifying bacteria willNH3-NtransformNOXThe required high oxygen environment and contact environment where pollutants can fully react with organisms.

There are two main aspects to economically and effectively create a high oxygen environment in the pool: the selection of fans (as described later) and the selection of aerators.

The choice of aerator determines the utilization efficiency of compressed air and the required oxygen supply. Through economic and technical comparisons, our aerator will choose a membrane aerator, which has the characteristics of high oxygenation power efficiency, high oxygen utilization rate, low clogging, and long service life.

A good contact environment is a necessary condition for ensuring sufficient contact and reaction of organic pollutants, oxygen, biofilm, water and other related substances. This device will be selectedPVCComposite semi soft fiber packing is used to ensure excellent contact environment in the aeration tank. It has a large specific surface area, easy membrane formation, non clogging, high porosity, and long service life.

Daily price of 20 tons of sewage treatment equipment——Equipment maintenance

1Unable to discharge water normally

Check if the connecting pipes between the contact oxidation tank, sedimentation tank, disinfection tank, and sludge tank are blocked (usually caused by detached biofilm and damaged elastic three-dimensional packing).

2Uneven aeration in the contact oxidation tank

Check if the outlet valve of the aeration fan is in the normal position and if the aeration head is damaged.

3The biofilm attachment effect is not significant

Check whether the aeration in the contact oxidation tank is uniform and whether the sludge in the secondary sedimentation tank is pumped to the tank; If the above situation is normal, add an appropriate amount of nutrients (such as white sugar, urea, etc.) to the pool.

4The effluent quality does not meet the standard

Excessive water ingress; Uneven aeration or prolonged shutdown of the contact oxidation tank (in which case the biofilm must be re cultured); Excessive sludge in the sedimentation tank (sludge must be removed); The disinfection device is shut down and the effluent is not disinfected for a long time.

5Automatic control malfunction

Check if the power supply of the automatic control cabinet is normal; Check if the supporting lifting pump and aeration fan are damaged (at this time, excessive current may cause the circuit breaker to automatically disconnect).