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A Municipal Wastewater Treatment Process for Recovering Organic Matter and Phosphorus

A technology for urban sewage and treatment process, applied in biological water/sewage treatment, water/sewage treatment, water/sewage multi-stage treatment, etc. It can solve the problem of unconsensus on recycling and use, and achieve easy recycling and enrichment steps. Simple, reducing the effect of chemical or biological transformations

Active Publication Date: 2021-09-17
SUZHOU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] There is no consensus on the need to recycle nitrogen from municipal wastewater

Method used

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  • A Municipal Wastewater Treatment Process for Recovering Organic Matter and Phosphorus

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] W1 (pretreatment): the urban sewage is pretreated by grit settling to remove large-scale floating objects and inorganic particles; the COD concentration of urban sewage is 200-350mg / L.

[0060] W2 (organic matter aggregation and transfer): input the pretreated sewage into the transfer aggregation tank, add 200-500mg / L aggregation medium, control the hydraulic retention time to 0.5-1.0 hours and keep stirring, so that the particles in the sewage can be adsorbed and aggregated , Colloids and macromolecular organic matter transfer and gather in flocs. When the process is first started, a commercially available organic coagulant is used as the aggregation medium.

[0061] W3 (separation and removal of organic matter): transfer the effluent of the aggregation tank into the sedimentation tank, control the ascending flow rate of 0.5-1.2m / h, and the hydraulic retention time of 1.5-3.0 hours, so that the flocs can be precipitated and separated to the bottom of the sedimentation ...

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Abstract

The invention discloses an urban sewage treatment process for recovering organic matter and phosphorus. The process system includes the main process units such as transfer aggregation, precipitation separation, biofilm and denitrification treatment, as well as hydrothermal treatment and modification preparation. Urban sewage is treated by transfer, aggregation and sedimentation, and the organic matter is concentrated and enriched in the sludge to be removed, and then enters the biofilm unit, absorbs and removes phosphorus through aerobic operation, and then undergoes biological denitrification treatment, and finally the effluent meets the discharge requirements. Part of the sludge is subjected to hydrothermal treatment, and the obtained water-soluble macromolecular polymer is modified to prepare a transfer aggregation medium, which is reused in the transfer aggregation process of sewage; Reuse the same recovery solution until the phosphorus in it increases to the limit concentration and then replace it to obtain a high-concentration phosphorus solution; hydrothermal treatment can also obtain the carbon source required for biofilm and biological denitrification. Excess sludge and hydrothermal treatment solid phase products are easy to recycle.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to an urban sewage treatment process for recovering organic matter and phosphorus. Background technique [0002] Urban sewage treatment is an important measure to prevent water pollution, protect water ecological environment, and ensure human life and health. The current urban sewage treatment technology aims to remove "pollutants" in sewage. By investing a large amount of energy and materials, the organic matter and nitrogen and phosphorus nutrients in sewage are decomposed and transformed into harmless end products or substances that can be separated and removed from water. form, to achieve the purpose of purifying water quality and preventing pollution. However, the so-called "pollutants" in urban sewage are mainly various raw materials and waste materials that are not fully utilized in human life, and they exist in sewage in the form of organic matter and various nitro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F101/30C02F101/10
CPCC02F1/5281C02F3/02C02F3/28C02F3/301C02F3/302C02F3/307C02F9/00C02F2001/007C02F2101/105C02F2101/30
Inventor 黄勇潘杨李大鹏李祥毕贞顾晓丹
Owner SUZHOU UNIV OF SCI & TECH
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