Sewage treating system for micro-aerobic expanded granular sludge bed-steel slag biological filter pond

A technology for expanding granular sludge and sewage treatment systems, applied in water/sludge/sewage treatment, sustainable biological treatment, multi-stage water/sewage treatment, etc. Problems such as large excess sludge output, etc., achieve the effect of improving operating efficiency, strengthening phosphorus removal effect, and reducing aeration energy consumption

Inactive Publication Date: 2013-04-24
NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Problems solved by technology

[0004] The present invention aims to solve the problems of large occupied area, high aeration energy consumption and large excess sludge output in the existing activated sludge process, and provides a compact structure, high-efficiency treatment, and low excess sludge output. Wastewater treatment systems with low operating costs

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  • Sewage treating system for micro-aerobic expanded granular sludge bed-steel slag biological filter pond

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Embodiment Construction

[0016] The present invention will be described below in conjunction with the accompanying drawings.

[0017] After the sewage influent is combined with the oxygenated reflux water of the micro-oxygen expanded granular sludge bed reactor, when it passes through the jet suction nozzle 2, a negative pressure is generated in the nozzle, and a certain amount of air is sucked in by the suction pipe 3, and then passes through the porous The water distribution plate 4 enters the micro-aerobic reaction zone 5 from the bottom, fully contacts and reacts with the micro-aerobic granular sludge, and organic pollutants are degraded, and the nitrification and denitrification processes carried out at the same time realize the transformation and removal of nitrogen, and the mixed solution passes through three stages. The phase separator 6 is effectively separated, the gas is discharged from the top of the three-phase separator, and a part of the clarified liquid enters the aeration column 9 thro...

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Abstract

The invention discloses a sewage treating system with a compact structure and low operation cost for a micro-aerobic expanded granular sludge bed-steel slag biological filter pond. According to the sewage treatment system, the problems of great occupied area, high aeration energy consumption and high yield of residual sludge in an aerobic activated sludge method are solved. The sewage treating system is formed by combining a micro-aerobic expanded granular sludge bed reactor and a steel slag biological filter pond in series, wherein the micro-aerobic expanded granular sludge bed reactor adopts an oxygenating mode combining jet flow air suction with reflow water external aeration. Inflowing sewage enters the micro-aerobic expanded granular sludge bed reactor firstly to remove pollutants such as COD (Chemical Oxygen Demand), ammonia nitrogen and total nitrogen and then enters a biological aerated filter pond taking steel slag as filler to remove total phosphorus and further improve the quality of effluent. According to the sewage treating system, small area is occupied, energy consumption is saved and the yield of sludge is low; and the sewage treating system is suitable for treating municipal sewage.

Description

technical field [0001] The invention relates to a sewage treatment system combined with a micro-oxygen granular sludge technology and a biological filter, which is suitable for the treatment of urban sewage. Background technique [0002] At present, most of my country's sewage treatment plants use the aerobic activated sludge process as the core treatment process. This type of process generally has the disadvantages of large floor area, high aeration energy consumption and large surplus sludge output, which is becoming less and less effective. To meet the needs of energy saving and emission reduction, there is an urgent need to develop new sewage treatment processes that save energy and operate efficiently. The high-efficiency anaerobic sewage treatment process with anaerobic granular sludge as the core has the advantages of small footprint, high volume load, low energy consumption, etc., and has broad application prospects. However, the anaerobic process alone cannot effect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F3/02C02F3/30
CPCY02W10/10
Inventor 刘晓尤志国杨梅杨永曹素卿陈艳华
Owner NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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