Method for treating high ammonia-nitrogen wastewater through multipoint dispersed water injection three-stage compound A/O (Anoxic/Oxic) process

A compound, high-ammonia-nitrogen technology, applied in the field of environmental protection, can solve the problems of high ammonia nitrogen and organic matter concentration, ammonia nitrogen and total nitrogen are difficult to meet the standards, and achieve the effect of large biomass, convenient maintenance and improved removal effect

Inactive Publication Date: 2017-06-13
TAIYUAN IRON & STEEL GROUP
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a biological treatment process for high-concentration ammonia-nitrogen wastewater to solve the problem of high concentrations of ammonia nitrogen and organic matter in wastewater, and at the same time solve the problem that wastewater effluent ammonia nitrogen and total nitrogen are difficult to reach the standard

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  • Method for treating high ammonia-nitrogen wastewater through multipoint dispersed water injection three-stage compound A/O (Anoxic/Oxic) process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Use the above-mentioned multi-point dispersed water injection three-stage composite A / O system (volume 60L) to treat the coking wastewater with high ammonia nitrogen, and the influent COD concentration is 3000mg / L; NH 4 + - The concentration of N is 150mg / L; the concentration of TN is 200mg / L, the total hydraulic retention time of the three-stage compound A / O system is controlled to 60h, and the influent ratios are 40%, 35%, and 25% respectively. The results show that: the system has an effect on COD, NH 4 + The removal rates of -N and TN are 95%, 98% and 76% respectively, and the main effluent pollutants can meet the coking chemical industry pollutant discharge standard (GB16171-2012).

Embodiment 2

[0028] Use the above-mentioned multi-point dispersed water injection three-stage composite A / O system (volume 100L) to treat the actual high-concentration coal chemical wastewater, and the influent COD concentration is 3500mg / L; NH 4 + - The concentration of N is 200mg / L; the concentration of TN is 300mg / L, the total hydraulic retention time of the three-stage compound A / O system is controlled to 55h, and the influent ratios are 60%, 25%, and 15% respectively. The results of the small test show that: the system is effective for COD, NH 4 + The removal rates of -N and TN are up to 88%, 93% and 78% respectively, and the main effluent pollutants can meet the petrochemical industry pollutant discharge standard (GB31571-2015).

Embodiment 3

[0030] Use the above-mentioned multi-point dispersed water injection three-stage composite A / O system (volume 120L) to treat actual high-concentration pharmaceutical wastewater, and the influent COD concentration is 5000mg / L; NH 4 + - The concentration of N is 800mg / L; the concentration of TN is 950mg / L, the total hydraulic retention time of the control three-stage compound A / O system is 90h, and the proportion of water inflow is 45%, 28%, and 17% respectively. The results of the small test show that: the three-stage composite A / O system is effective for COD, NH 4 + The removal rates of -N and TN are up to 92%, 97% and 80% respectively, and the main effluent pollutants can meet the water pollutant discharge standard of traditional Chinese medicine pharmaceutical industry (GB 21906-2008).

[0031] The three-stage composite A / O system of the present invention is composed of a first-stage A / O biofilm reactor 5, a second-stage A / O biofilm reactor 6 and a third-stage A / O biofilm ...

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Abstract

The invention discloses a method for treating high ammonia-nitrogen wastewater through a multipoint dispersed water injection three-stage compound A/O (Anoxic/Oxic) process and belongs to the field of environment friendliness. The method comprises the following steps: pretreating the high ammonia-nitrogen wastewater, and enabling the wastewater to enter a regulating reservoir; enabling the effluent to enter a biological treatment system, wherein the biological treatment system comprises an A/O reactor in three-stage series operation; respectively injecting water into a primary A/O reactor, a secondary A/O reactor and a three-stage A/O reactor in a dispersed manner according to a ratio, wherein the reactor is jointly built by an anoxic area and an oxic area with the same volume; the inlet water is in a multipoint dispersed injection manner; the inlet water in the primary A/O reactor, the secondary A/O reactor and the three-stage A/O reactor is respectively 30-40%, 20-30% and 10-20% of the total water amount of the inlet water; and the water inlet position is the anoxic area of the three-stage A/O reactor; and enabling the treated wastewater to freely flow out from the top of a secondary sedimentation tank, periodically discharging the sludge, and enabling the sludge to enter the primary A/O reactor through a sludge return pump. The method disclosed by the invention has excellent popularization prospects on treatment of coking plant wastewater.

Description

technical field [0001] The invention belongs to the technical field of environmental protection and is used for industrial sewage treatment, in particular to a biological treatment process for high-concentration ammonia nitrogen wastewater. Background technique [0002] With the continuous improvement of urbanization and industrialization, the water environment has seriously affected the sustainable development of the national economy and society, and seriously threatened the survival of human beings. The problem of water pollution is one of the major environmental issues of global priority. Especially in recent decades, excessive nitrogen pollutants produced by human life and production have been discharged into water bodies, resulting in water hypoxia, stench and eutrophication. Removing nitrogen from water has become a key issue in water pollution prevention and control. [0003] The use of microorganisms is one of the most widely used technologies for ammonia nitrogen w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14
CPCC02F9/00C02F1/00C02F1/24C02F1/52C02F1/66C02F3/301C02F2101/16C02F2301/08
Inventor 周鑫白灵宝贺世泽高晔明王万江仇明山金胜利
Owner TAIYUAN IRON & STEEL GROUP
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