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Efficient denitrification treatment method for kitchen wastewater

A kitchen waste water and treatment method technology, which is applied in water/sewage treatment, biological water/sewage treatment, light water/sewage treatment, etc., can solve the problem of inhibition affecting the stable operation of the system, the long cycle of land treatment method, and the influence of external environment Larger problems, etc., to achieve the effect of strengthening biological denitrification efficiency, less residual sludge output, and better treatment effect

Inactive Publication Date: 2021-02-02
SHANGHAI HONESS ENVIRONMENTAL TECH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The pollutants removed by physical treatment are limited, and are usually used as pretreatment; chemical treatment requires a large amount of chemicals, which is costly and easily causes secondary pollution; physical and chemical treatment includes catalytic oxidation, incineration, electrochemical, etc., and the treatment cost Higher; land treatment has a long cycle and has certain risks to soil safety; biological treatment is currently the most widely used method, and biological denitrification is currently used to remove ammonia nitrogen and total nitrogen in wastewater. However, biological treatment is affected by the external environment. Large impact, water quality fluctuations, high ammonia nitrogen inhibition of microorganisms, etc. will affect the stable operation of the system

Method used

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  • Efficient denitrification treatment method for kitchen wastewater

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Embodiment 1

[0048] Such as figure 1 As shown, the efficient denitrification treatment method of kitchen wastewater; the steps are as follows:

[0049] Step 1. Pretreatment of kitchen waste water; pretreatment uses physical treatment to remove grease and large particle suspended matter in waste water;

[0050] Step 2. Input the pretreated kitchen wastewater into the first-stage anoxic tank, mix it with the sludge returned from the membrane pool, and the mixed liquid returned from the first-stage aerobic pool, and transfer from the first-stage aerobic pool to the first-stage aerobic pool. The reflux system of the level anoxic tank provides nitrate nitrogen for denitrification reaction;

[0051] Step 3. The kitchen wastewater that has completed the nitrification reaction in the first-stage anoxic pool enters the first-stage aerobic pool from the effluent of the first-stage anoxic pool, and removes most of the organic matter through aeration to realize nitrification;

[0052] Step 4. Comple...

Embodiment 2

[0096] For example, a certain kitchen waste wastewater treatment station adopts the method of the present invention for treatment, specifically a combined process of three-stage anoxic aerobic + membrane pool.

[0097] Influent CODCr is 5000-8000mg / L, NH3-N is 1000-2000mg / L, TN is 1000-2500mg / L, and the total hydraulic retention time is 110h. After treatment, CODCr is less than 300mg / L, NH3-N is less than 10mg / L, TN is less than 30mg / L, the average removal rate of CODCr is above 90%, and the average removal rate of NH3-N and TN is above 99%.

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Abstract

The invention discloses an efficient denitrification treatment method for kitchen wastewater. The method comprises the following steps: 1, pretreating the kitchen wastewater; 2, inputting the kitchenwastewater into a first-stage anoxic tank, and mixing the kitchen wastewater with sludge returned by a membrane tank and a mixed solution returned by a first-stage aerobic tank for denitrification reaction; 3, enabling the kitchen wastewater to enter the first-stage aerobic tank, conducting aeration to remove most of organic matter, and achieving a nitration reaction 4, enabling the kitchen wastewater to enter the next-stage anoxic tank, and continuously performing denitrification reaction on the residual nitrate nitrogen; 5, repeatedly executing the step 2 to the step 4, so as to enable the kitchen wastewater to be treated by the multiple stages of anoxic tank treatment and corresponding aerobic tank treatment; 6, enabling the kitchen wastewater to enter the membrane tank, and further degrading residual organic matter; and 7, putting the kitchen wastewater treated by the membrane tank into a clean water pool. The application of the invention can fully ensure the stable operation, highefficiency and reliability of the kitchen wastewater denitrification treatment process.

Description

technical field [0001] The invention relates to the technical field of kitchen wastewater treatment, in particular to an efficient denitrification treatment method for kitchen wastewater. Background technique [0002] With the rapid development of the economy and the continuous increase of the population, the pollution of water resources is also becoming more and more serious. Among them, kitchen wastewater is a common wastewater, and its annual production is also increasing. Kitchen wastewater is mainly wastewater generated from the treatment of kitchen waste. Its main characteristics are complex water quality, high chemical oxygen demand, and high oil content. And high ammonia nitrogen and high phosphorus, etc., so the kitchen waste wastewater will cause serious pollution to the ecological environment without strict treatment. [0003] However, due to the complex water quality of kitchen waste wastewater, large fluctuations in water quality, and high pollution levels, it ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F101/16
CPCC02F9/00C02F3/302C02F1/444C02F1/32C02F1/5281C02F1/5236C02F1/66C02F3/342C02F3/34C02F2101/16
Inventor 王文标朱成辉冯凯
Owner SHANGHAI HONESS ENVIRONMENTAL TECH CORP
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