Integrated treatment equipment for domestic sewage——Equipment Composition

(1)Primary sedimentation tank: The equipment's primary sedimentation tank is a vertical flow sedimentation tank, and the upward flow velocity of sewage in the sedimentation tank is0.6-0.7mm/In seconds, the settled sludge is lifted to the sludge tank by air. (Note:WSZ-A O.5-5m3/hNo initial sedimentation tank is provided

(2)Contact oxidation tank: After initial sedimentation, the water flows automatically to the contact tank for biochemical treatment. The contact tank is divided into three stages, with a total residence time of 1More than hours. Enhanced equipment can achieve contact oxidation time up to 6 Hour, the filler is a novel trapezoidal filler. Easy to form conjunctiva and not clog. The specific surface area of the filler is160m2/m3The gas water ratio of the contact pool is12:1about. (Note)WSZ-A 0.5-5T/hThe contact pool is at the second level

(3)Secondary sedimentation tank: Biochemical wastewater flows into the secondary sedimentation tank, which consists of two vertical flow sedimentation tanks operating in parallel. The upward flow velocity isO.3-0.4mm/In seconds. The sludge is discharged by air lifting to the sludge tank. (Note)WSZ—A0.5-5mT/hThe sludge flows automatically into the sludge tank

(4)Disinfection pool and disinfection device: Disinfection pool according to specifications:“TJI4— 74 ”The standard is 30 In minutes, if it is hospital sewage, the disinfection tank can increase the residence time to1-1.5At the hour, solid chlorine tablets are used for contact dissolution disinfection. The disinfection device can continuously change the dosage according to the size of the water output, achieving the goal of adding more water and more medicine, and adding less water and less medicine. Other disinfection devices can be prepared separately. (Note):If used for industrial wastewater disinfection tanks and disinfection devices, it is not necessary

(5)Sludge tank: All sludge from the primary and secondary sedimentation tanks is transported by air toWSZ-AAerobic digestion is carried out in the sludge tank. The clear liquid from the sludge tank flows back to the contact oxidation tank for further treatment. After digestion, there is very little residual sludge, generally1-2Clean once a year. The cleaning method can be to use a suction truck to extend from the inspection hole of the sludge tank into the bottom of the sludge and carry out suction and transportation. （WSZ-A 0.5-5T/hSludge is digested anaerobically

(6)Fan room, fan: equipmentWSZ-AThe fan room is located above the disinfection tank, and the inlet adopts double-layer sound insulation. The inlet has a muffler and fan filter, so there is no noise during operation. Two fans are usedLType Roots blower, capable of automatic alternating operation. Single fan operating life 30000 About hours
≥80%

Integrated treatment equipment for domestic sewage——The working principle of anaerobic biofilter

1Filter function: The packing material intercepts and filters large particles and suspended solids in the incoming water

2Anaerobic microorganisms can hydrolyze insoluble substances of large molecules into soluble substances of small molecules through hydrolysis

3Anaerobic microorganisms adsorb and absorb organic pollutants in water, partially for their own growth and reproduction, and partially in the form of biogasUType water seal out

4Denitrification process: Denitrifying bacteria that reflux the effluent from the contact oxidation bed to the anaerobic microorganisms in the anaerobic filter can utilize the nitrate nitrogen in the reflux water and convert it into nitrogen to remove nitrogen substances from the wastewater. The treatment of rural sewage by anaerobic filters reduces the concentration of suspended solids, organic pollutants, and nitrogen, as well as the subsequent load on the contact oxidation bed.

Integrated treatment equipment for domestic sewage——Maintenance and troubleshooting of buried sewage treatment equipment
1It is necessary to pay attention to the absence of large solid substances in the sewage entering the equipment, in order to avoid blocking the pipes and holes and damaging the water pump;
2The equipment manhole must be covered to prevent accidents or large solid objects from falling in;
3Wastewater entering the equipmentPHThe value must be within6—9Between them, being acidic or alkaline can affect the normal growth of biofilms;
4The fan generally operates6It is necessary to change the engine oil every month or so to improve the service life of the fan;
5It is necessary to ensure that the air inlet of the fan is unobstructed.
6Troubleshooting of buried sewage treatment equipment:

Integrated treatment equipment for domestic sewage-Foundation pit civil engineering

（1）According to the size of the buried sewage treatment equipment model, the foundation pit must be sloped. The slope size depends on the soil conditions and the thickness of the covering soil above the top of the product. The slope angle is30°-50°.
（2）The depth of excavation and the elevation of the inlet and outlet connected to the sewage pipeline should reserve the bottom of the trench when calculating the elevation200mmSand laying size; The excavated soil pile is placed around the trench pit5To prevent landslides caused by lateral soil pressure beyond meters, and to reserve a work site for the lifting of domestic sewage treatment equipment.

（3）When encountering groundwater, the groundwater should be drained first, and foundation treatment should be carried out according to the size and requirements of the schematic diagram. The base layer should be compacted, and then sand should be laid. sanding200mmAnd level it, no sharp corners, stones or other debris are allowed in the sand.
（4）When there is no groundwater, compact and sand the foundation, and carry out foundation treatment according to the schematic diagram and requirements.
（5）In areas with high groundwater levels, trench excavation with increased precipitation or open precipitation can be used. When using open precipitation to dig trenches, preparation work must be done before construction.