Washing wastewater treatment method——principle

The principle of buried sewage treatment equipment isADue to the high concentration of organic matter in sewage, microorganisms are in a state of hypoxia. At this time, microorganisms are facultative microorganisms that convert and decompose organic nitrogen in sewage intoNH3-NAt the same time, using organic carbon sources as electron donorsNO2-N、NO3-Nconvert toN2And it also utilizes some organic carbon sources andNH3-NSynthesize new cellular substances. soAThe graded pool not only has a certain surface removal function, but also reduces the organic load of the subsequent aerobic pool. Beneficial for nitrification and relying on the high concentration of organic matter present in the raw water to complete denitrification, ultimately eliminating nitrogen eutrophication pollution. existODue to the significant reduction in organic matter concentration, there is still a certain amount of organic matter and high levels in the sewage treatment equipmentNH3-NExistence. In order to further oxidize and decompose organic matter, and to ensure the smooth progress of nitrification after carbonization is completed. existOSet up aerobic biological contact oxidation tanks with low organic load. existOThere are mainly aerobic microorganisms and self oxidizing bacteria in the graded pool.Aerobic microorganisms decompose organic matter intoCO2andH2O;Self oxidizing bacteria utilize inorganic carbon produced by the decomposition of organic matter or in the airCO2As a source of nutrients, extract nutrients from wastewaterNO2-N、NO3——NOThe outflow of the graded pool flows intoALevel pool. doAThe graded pool provides electron acceptors and ultimately eliminates nitrogen pollution through denitrification.

Washing wastewater treatment method——application
Domestic sewage treatment in tourist scenic areas, vacation areas, villa areas, water source protection areas, stations, toll stations, small residential areas, temporary construction sites, etc

Wastewater treatment for various civil buildings such as office buildings, residential communities, hospitals, hotels, schools, sports venues, etc.

Rural domestic sewage treatment and continuous improvement of rural environment.
The treatment of industrial and domestic wastewater.

Washing wastewater treatment method——A/OAdvantages of craftsmanship

（1）High efficiency. This process has a high removal effect on organic matter such as ammonia nitrogen in wastewater. When the total dwell time is greater than54hAfter biological denitrification, the effluent can be treated by coagulation and sedimentationCODThe value drops to100mg/LThe following other indicators also meet the emission standards for total nitrogen removal rate70%above.

（2）Simple process, low investment, and low operating costs. This process uses organic matter in wastewater as the carbon source for denitrification, so there is no need to add expensive carbon sources such as methanol. Especially when the ammonia distillation tower is equipped with a device for removing fixed ammonia, the carbon nitrogen ratio is increased, and the alkalinity generated during denitrification correspondingly reduces the alkali consumption required for the nitrification process.

（3）The anaerobic denitrification process has a high degradation efficiency for pollutants. in compliance withCOD、BOD5andSCN-The removal rate in the hypoxic stage67%、38%、59%The removal rates of phenol and organic matter are respectively62%and36%Therefore, denitrification reaction is an economical and energy-saving degradation process.

（4）High volumetric load. Due to the use of enhanced biochemical denitrification and high concentration sludge membrane technology in the nitrification stage, the sludge concentration of nitrification and denitrification has been effectively increased, resulting in a higher volumetric load compared to similar foreign processes.

（5）Hypoxia/The aerobic process has strong resistance to load impact. When the inflow water quality fluctuates greatly or the concentration of pollutants is high, this process can maintain normal operation, so the operation and management are also very simple.

Washing wastewater treatment method——Installation and debugging steps

Installation, initial operation, and commissioning of buried sewage treatment equipment. When the water level reaches half of the height of the equipment, stop the water pump from entering, open the inlet valve of the fan, open the fan, slowly open the outlet valve of the fan, and aerate the touch oxygen tank48After an hour, start the water inlet and increase the water pump to add the sewage to three-quarters of the equipment, and then aerate the pool24Hour.
The staff should touch the seasoning with their hands to see if there is a sticky feeling, and investigate the growth of microorganisms in the water body together until a biofilm grows. Only then can the sewage be transported to the equipment, and the water volume should be gradually increased to the planned amount.
Timely investigate the growth status of microorganisms in water, and adjust the inflow amount promptly if any abnormalities are found.
To investigate the flow pattern of the secondary sedimentation tank water, it is necessary to collect the water evenly through the outlet weir, usually every24It is necessary to discharge the sludge once every hour. When discharging, open the sludge discharge solenoid valve and use the air lift method to lift the sludge in the secondary sedimentation tank to the sludge tank.
The buried sewage treatment equipment needs to add disinfectant in the disinfection tank as needed. The water from the secondary sedimentation tank passes through the disinfectant dosing tank, and some of the chemicals dissolve to achieve the purpose of disinfection. The treated water stays in the clean water tank for about0.5After an hour, the discharge request was reached and it was able to be discharged into the external water body.
After the equipment is debugged and running normally, the system can enter active operation, and the operation of the water pump and fan can be switched to active operation on site.

Regularly test the effluent quality to ensure the normal operation of the equipment.

Washing wastewater treatment method——Maintenance methods for buried sewage treatment equipment.
1Listen attentively. Listen carefully for any abnormal sounds from bearings, water pumps, motors, transformers, etc.
2Watch frequently. Check the current, voltage, temperature, water level in the inlet pool, and equipment dynamics frequently.
3Smell frequently. Check for any unusual odors in the shaft seal mechanism, couplings, motors, electrical equipment, and other parts of the operating equipment.
4Touch frequently. Any parts that can be touched by hand without the need for special safety measures to determine whether the equipment is in normal condition should be inspected, mainly including the temperature and vibration conditions of the equipment oil tank, motor and bottom, bearings, etc.
5Regularly collect garbage. Regularly clean the garbage in the collection tank, grille, and slag conveyor to ensure smooth water inflow.
6Be diligent and hands-on. Make all necessary records and take action to solve problems.