A sewage treatment plant at a slaughterhouse
Project site at Saudi Arabia
Capacity: 500 m3/day
Technologies:
-Air flotation system for suspended solids removal;
-A2/O system for COD(organic substance) removal;
-Filter press for water removal of sludge;
Operation status: excellent, water is clean enough for environmental discharging friendly;
Flow Chart:
A2/O (Anaerobic/Anoxic/Oxic) sewage treatment system, is a kind of biological processing technology, high adaptability for different sewage quality, good anti-load performance, stable output quality, no expanded sludge output and low operation cost.
The A2 / O process is divided into anaerobic, anoxic and oxic segments. The anaerobic and oxic segments are equipped with biological fillers for microbial metabolic activities, along with reactions of hydrolysis and acidification of COD/BOD. Blower and aeration system are installed in the oxic segment, the decomposed organic substance is absorbed by means of aerobic bacteria's metabolism, to achieve the purpose of water purification.
The material and equipment involved in this system are chemical packings and support, chemical additive, air blowers, aerators, overflow weirs, level controller, steady flow tube, agitators(optional),pumps, valves, pipes, connection fittings, filter press, etc;
The flow-chart of A2/O system(If get air flotation system included ahead of A2/O):
Civil works involved include anaerobic pool, anoxic pool, first biological pool, secondary biological pool, secondary sediment pool, sludge basin, disinfection pool and blower room,etc. Equipment involved are fillers&support, blowers, aeration system, sludge press, pumps, pipeline, chemicals and so on.
Sometimes simpler design is also suitable, eg. A/O(Anoxic / Oxic) only, in accordance with the characteristics of sewage quality and design requirements.
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