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Improved process of activated sludge and biological film composite type A2/O

A technology of activated sludge and biofilm, applied in the field of urban sewage treatment, achieves the effects of low cost, strong adaptability and stability, and improved nitrification reaction speed

Inactive Publication Date: 2009-01-21
中钢集团武汉安全环保研究院有限公司
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Problems solved by technology

[0003] The purpose of the present invention is for the existing A 2 Inherent defects in the / O process, providing a composite type A of activated sludge and biofilm 2 / O improved process to solve the contradictions existing in the traditional nitrogen and phosphorus removal process

Method used

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  • Improved process of activated sludge and biological film composite type A2/O
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  • Improved process of activated sludge and biological film composite type A2/O

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Embodiment Construction

[0017] The present invention will be further described below in conjunction with the accompanying drawings.

[0018] figure 1 It is a process flow diagram of the present invention, which consists of three stages of anaerobic, anoxic and aerobic processes. This is a common A2 / O process. This improved A2 / O process is to add ciliated biological filler in the aerobic reactor 1. Use an ultrasonic treatment device to cavitate and decompose the remaining sludge in the secondary settling tank into liquid soluble organic matter, and return this part of the sludge to the front end of the anoxic reactor. To add the ciliated biological filler 1, a support 1 needs to be set in the aerobic reactor, the ciliated biological filler 1 is suspended on the support 2, the ciliated biological filler 1 has a tapestry structure, and the blanket surface 3 is composed of porous collagen , the carpet surface 3 is attached with straight hairy coarse fibers 4 .

[0019] with ordinary A 2 / O process is ...

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Abstract

The invention relates to an improved process for activated sludge and biomembrane composite A<2>O. The improved process consists of three stages of processes, i.e. an anaerobic stage, an anoxic stage and an aerobic stage, and is characterized in that a ciliary biological packing material is added in an aerobic reactor; an ultrasonic treatment device is adopted to carry out cavitated decomposition for residual sludge inside a secondary settling tank so as to form organic substance with liquid solubility; moreover, the sludge is returned to the front end of an anoxic reactor. The improved process adopts the ciliary biological packing material to fix a great amount of nitrifying bacteria of long generation reproduction time, thereby improving the speed of nitration reaction and reducing the influence on nitrifying flora caused by sludge age change; the ultrasonic treatment device is adopted to treat residual sludge, thereby making use of efficient useful substances contained in the residual sludge; meanwhile, the improved process solves the problem of insufficient carbon source during A<2>O technological process, and maintains better denitrogenation and dephosphorization effects for an A<2>O technological system at the same time.

Description

technical field [0001] The invention belongs to the technical field of urban sewage treatment and relates to an improved type A 2 / O process, specifically related to an activated sludge and biofilm composite type A 2 / O Improved crafting. Background technique [0002] For a long time, the treatment of urban sewage has been aimed at removing BOD and SS, without considering the removal of inorganic nutrients nitrogen and phosphorus. With the eutrophication of water body and the requirement of reclaimed water re-supply, effectively reducing the content of nitrogen and phosphorus in sewage has become an important factor in the process selection of sewage treatment plants. The national "Comprehensive Wastewater Discharge Standard" promulgated and implemented in 2002 clearly stipulates the discharge standards of nitrogen and phosphorus. To meet these discharge standards, many sewage treatment facilities need to consider the issue of nitrogen and phosphorus removal. become incre...

Claims

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Application Information

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IPC IPC(8): C02F3/30C02F1/36
Inventor 夏文林曾祥文黄晶晶白亚风张勇张智良
Owner 中钢集团武汉安全环保研究院有限公司
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