mini mobile domestic sewage water treatment plants

 Technical process:

(1)Equalize tank: reinforced concrete structure, used to homogenize water volume and quality.

(2)Primary settling tank:the sewage ascending flow rate in this tank is 0.2-0.3mm/S, the settling sludge will lifting to sludge storage tank by Solid air lift.

(3) Contact oxidation tank: the primary settling sewage will flow into here proceeding biochemical treatment, it can divide three-level, the total retention time is 4-6h, padding is novelty elastic padding, easy to membrane, no blocking, padding/surface area is 160m2/m3, gas-water ratio is about 12:1.

(4) Second settling tank: the sewage after biochemical treatment will flow into second settling pond, ascending flow rate is 0.1-0.15mm/s,surface loading less than 1.0m3/m2.h, discharge sludge using air lift to sludge storage tank.

(5) Disinfection pond:  

(6) Sludge storage tank: all sludge in the primary settling tank and second settling tank need air lifting to sludge storage pond, then proceeding aerobic digestion, the supernatant liquor in sludge storage tank backflow into contact oxidation pond reprocessing , the surplus sludge is very little, it need clean 1 time every 1-2 years usually, cleaning manner can be use fecing suction truck stretch into sludge tank bottom from manhole of sludge storage tank sucking it and transport outward.

(7) Air blower room: it set up above the sterilization tank, its inlet adopt two layer sound-proofing, the air intake has muffler ,fan filter, no noise when operation, air blower adopt two units L type roots blower , which can automatic replace operation, unit blower operation life about 30000h.

Technology process:

The effluent water from septic tank will first flow into grilling well , the grilling can remove bigger suspended matter, seston and ribbon in sewage, then flow into equalize tank, the equalize tank function is equalize sewage volume and quality, make the sewage enter into the integrated sewage treatment equipment by lifting pump.

The sewage first enter to the primary settling tank of integrated sewage treatment , In the primary settling tank , due to organic matter content is high, Microbes in anaerobic condition, at this time, microbes is facultative microbes, they make the organic nitrogen into ammonia nitrogen in sewage , Use of organic carbon source as electron donor, make  convert into N₂ ,and adopt parts of organic carbon source and ammonia nitrogen synthesis new cells material. So the primary settling tank has the function of organic matter removal, reduce organic loading of subsequent three level biochemical tank, good for proceeding nitrification , and rely on high content organic matter in sewage ,finish denitrification, final eliminate nitrogen eutrophication pollution. after pass by primary settling tank biochemical action, the sewage still contain some organic matter and higher content ammonia nitrogen. in order to make the organic matter further oxygenolysis, at the same time, carbonation tend to be completely, nitrification can proceeding smoothly, so set contact oxidation tank, its rely on Autotrophic type bacteria finish treatment, they adopt Organic decomposition producing inorganic carbon source or carbon dioxide in air as nutritional sources, make the ammonia nitrogen in sewage convert into . In primary settling tank and contact oxidation tank all install padding, the whole Biochemical process rely on many microbes attached on the padding. The dissolved oxygen in primary settling tank is control around 0.5mg/L, but in contact oxidation tank the dissolved oxygen is above 2mg/L,some effluent water from contact oxidation tank back flow into equalize tank proceeding internal Circulation, so achieve denitrification purpose, another parts will flow into secondary settling tank, proceeding solid-liquid separation, the effluent water after separated will enter into disinfecting tank, the effluent water afterdisinfection treatment by chemical agentia will reach to standard and reuse in irrigation.

 Technology major Parameter