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Constant water level sequencing batch active sludge process and system for treating sewage

An activated sludge and sequencing batch technology, applied in the field of sewage treatment, can solve the problems of low utilization rate of equipment and tank capacity, unstable dephosphorization and nitrogen removal effect, large head loss, etc., so as to reduce energy consumption and improve operation effect. , the effect of small footprint

Active Publication Date: 2007-06-27
THUNIP CORP LTD
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Problems solved by technology

[0013] The SBR method can perform multiple tasks such as phosphorus removal, nitrogen removal, organic matter degradation, and solid-liquid separation in one reaction tank at the same time through the alternating changes of oxygenation, anoxic, anaerobic and precipitation conditions, without the need to build a secondary settling tank and Sludge return facilities occupy less land, save investment and energy consumption; but the utilization rate of equipment and pool capacity is low, the effect of phosphorus and nitrogen removal is unstable, and the head loss is also large

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  • Constant water level sequencing batch active sludge process and system for treating sewage
  • Constant water level sequencing batch active sludge process and system for treating sewage

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Embodiment Construction

[0040] The method for treating sewage with constant water level sequencing batch type activated sludge proposed by the present invention first makes 10% to 30% of the pretreated sewage through the grid and grit chamber enter the anoxic pool, and removes the waste from the sequence batch pool in the anoxic pool The nitrate brought in the return sludge, the volume ratio of the return sludge to the total influent of the system, that is, the reflux ratio is 2 to 3:1, and the residence time is 1.0 to 2.0 hours; the sewage in the anoxic tank and the passing 70% to 90% of the pretreated sewage of the grid and the grit chamber enters the anaerobic tank together, and the two are mixed to make the phosphorus accumulating bacteria in it absorb the volatile acid produced by the hydrolysis and acidification of the sewage to release phosphorus, and the residence time is 1.5 to 2.0 Hours; make the sewage flow into the aerobic pool, degrade the organic matter in the sewage, remove the ammonia ...

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Abstract

The present invention is constant water level sequencing batch active sludge process for treating sewage, and belongs to the field of sewage treating technology. The process includes pre-treating sewage in grille and settling basin, treating partial sewage in the anoxia pond and the other in the anaerobic pond with sludge, treating in the aerobic pond to degrade organic matter, eliminate ammonia nitrogen and absorb phosphorus from sewage, and final flowing into the sequencing batch pond for exhausting water reaching the drainage standard. The present invention has the advantages of high treating efficiency, stable running, high apparatus utilization rate, low power consumption, etc.

Description

technical field [0001] The invention relates to a method and a system for treating sewage with constant water level sequence batch activated sludge and belongs to the technical field of sewage treatment. Background technique [0002] The existing treatment process is briefly summarized as follows: [0003] 1. Anaerobic-anoxic-aerobic activated sludge process [0004] Anaerobic-Anoxic-Oxic process (Anaerobic-Anoxic-Oxic) is the abbreviation of anaerobic-anoxic and aerobic biological nitrogen and phosphorus removal process. Hereinafter referred to as A 2 / O process, the flow diagram is shown in Figure 1, where 1 is the water inlet, 2 is the anaerobic tank, 3 is the anoxic tank, 4 is the aerobic (nitrification) tank, 5 is the secondary sedimentation tank, 6 is the effluent, 7 is the return flow of the mixed liquid, 8 is the return sludge, and 9 is the excess sludge. [0005] A 2 The advantage of the / O process is to make full use of the nitrate oxygen in the nitrification ...

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Application Information

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IPC IPC(8): C02F3/30
Inventor 李星文贺北平袁琳廖钧王妍春
Owner THUNIP CORP LTD
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