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High-efficiency biological treatment method of high-organic matter high-kjeldahl type nitrogen chemical industry wastewater

A technology for chemical wastewater and biological treatment, applied in chemical instruments and methods, water/sludge/sewage treatment, aerobic and anaerobic process treatment, etc. Nitrogen, etc.

Inactive Publication Date: 2010-02-03
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

One of the common features of these processes is that they are all mixed biological reaction systems, that is, the degradation of organic matter and Kjeldahl nitrogen needs to be carried out simultaneously in the same set of reactors, resulting in the matrix and competition in living environment
When dealing with wastewater with low organic matter and low Kjeldahl nitrogen, due to the moderate competition between the two microorganisms, the two pollutants can be well degraded at the same time; but when dealing with wastewater with high organic matter and high Kjeldahl nitrogen, due to the The competition between them is very fierce. Nitrifying microorganisms are mainly autotrophic microorganisms, which are difficult to compete with organic mineralization microorganisms for a common substrate and living environment. It is difficult to convert ammonia nitrogen into nitrate nitrogen, making it difficult to remove ammonia nitrogen.

Method used

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  • High-efficiency biological treatment method of high-organic matter high-kjeldahl type nitrogen chemical industry wastewater
  • High-efficiency biological treatment method of high-organic matter high-kjeldahl type nitrogen chemical industry wastewater

Examples

Experimental program
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Effect test

Embodiment 1

[0013] 1) Inject 500L of chemical wastewater raw water into the distribution tank, add sodium bicarbonate to make the ratio of Kjeldahl nitrogen / alkalinity to 7.14, add sodium dihydrogen phosphate with a concentration of 50mg / L, stir for 5 minutes, and settle for 0.5 hours;

[0014] 2) The chemical wastewater treated by water distribution in the water distribution tank is continuously fed into the first-stage anaerobic tank through the water inlet pump at a flow rate of 10L / h, and stirred at a stirring speed of 80r / h and a temperature of 20°C; the effluent enters the first-stage aerobic tank The aerobic pool has an air-to-water ratio of 50 / 1 and a temperature of 25°C; the organic matter in the wastewater is removed through the hydrolytic acidification of the anaerobic pool and the aerobic oxidation of the aerobic pool, and the organic nitrogen is released to be converted into ammonia nitrogen; the effluent enters the middle Sedimentation tank, settling for 4 hours, the activate...

Embodiment 2

[0018] 1) Inject 500L of chemical wastewater raw water into the distribution tank, add sodium bicarbonate to make the ratio of Kjeldahl nitrogen / alkalinity to 7.14, add sodium dihydrogen phosphate with a concentration of 50mg / L, stir for 10 minutes, and settle for 1 hour;

[0019] 2) The chemical wastewater treated by water distribution in the water distribution tank is continuously fed into the first-stage anaerobic tank through the water inlet pump at a flow rate of 15L / h, and stirred at a stirring speed of 120r / h and a temperature of 25°C; the effluent enters the first-stage aerobic tank The gas-water ratio of the aerobic pool is 60 / 1, and the temperature is 28°C; the organic matter in the wastewater is removed through the hydrolytic acidification of the anaerobic pool and the aerobic oxidation of the aerobic pool, and the organic nitrogen is released and converted into ammonia nitrogen; the effluent enters the middle Sedimentation tank, settling for 8 hours, the activated s...

Embodiment 3

[0023] The schematic diagram of the technological process of this embodiment is shown in the accompanying drawings. The effective volume and hydraulic retention time (flow rate: 10L / h) of each unit are as follows:

[0024] surface

[0025]

[0026] 1) Inject 500L of chemical wastewater raw water into the distribution tank, add sodium bicarbonate to make the ratio of Kjeldahl nitrogen / alkalinity to 7.14, add sodium dihydrogen phosphate with a concentration of 50mg / L, stir for 10 minutes, and settle for 0.5 hours;

[0027] 2) The chemical wastewater treated by water distribution in the water distribution tank is continuously fed into the first-stage anaerobic tank through the water inlet pump at a flow rate of 10L / h, and stirred at a stirring speed of 120r / h and a temperature of 20°C; the effluent enters the first-stage aerobic tank The aerobic pool has an air-to-water ratio of 50 / 1 and a temperature of 25°C; the organic matter in the wastewater is removed through the hydrol...

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Abstract

The present invention discloses a biological treatment method aiming at the chemical wastewater with high organic matters and high TkN. The treatment method includes the following steps: water is allocated into a service reservoir and the nutrient salt concentration is to be regulated; the treatment conditions of each treatment unit of the subsystem of section1 and the subsystem of section2 are tobe controlled, and making use of the thought of quality-divided treatment to lead the mineralization of the organic matter and the nitration-denitrification of the ammonian can be accomplished in twocompletely independent subsystems. The present invention can remove the organic matters and high TkN in wastewater quickly and effectively through the thought of quality-divided treatment. The biological treatment thought and method of the chemical wastewater with high organic matters and high TkN provided by the present invention can successfully treat the chemical wastewater with high organic matters and high TkN without changing the prior biological treatment facility in large scale.

Description

technical field [0001] The invention relates to a method for biological treatment of industrial waste water with high organic matter and high Kjeldahl nitrogen. This kind of wastewater biological treatment method can specifically and efficiently degrade organic matter and Kjeldahl nitrogen in wastewater, and is mainly used for the treatment of high organic matter and high Kjeldahl nitrogen chemical wastewater. Background technique [0002] With the rapid development of the organic chemical industry and the mass production of emerging organic products, the production of high-organic and high-Kjeldahl nitrogen chemical wastewater has greatly increased. This type of wastewater is directly discharged into the natural environment without decarbonization and denitrification treatment, which will inevitably cause serious damage. environmental pollution. The existing wastewater biological treatment process has a good treatment effect in the treatment of urban sewage and chemical wa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/30C02F101/38
Inventor 杜平李文红陈英旭严复平王宇峰
Owner ZHEJIANG UNIV