High-ammonia-nitrogen low-C/N-ratio wastewater treatment system and treatment technique

A wastewater treatment system and wastewater treatment technology, applied in biological water/sewage treatment, water/sludge/sewage treatment, aerobic and anaerobic process treatment, etc., can solve the problem of unstable denitrification effect and achieve the improvement effect , The effect of good denitrification effect and low operating cost

Active Publication Date: 2016-05-18
湖州至美生物科技有限公司
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Problems solved by technology

However, the denitrification in this traditional process is easily affected by the

Method used

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  • High-ammonia-nitrogen low-C/N-ratio wastewater treatment system and treatment technique
  • High-ammonia-nitrogen low-C/N-ratio wastewater treatment system and treatment technique

Examples

Experimental program
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Effect test

Embodiment 1

[0051] A sewage treatment plant is mainly industrial sewage, accounting for more than 80%. The industrial sewage is mainly synthetic leather DMF wastewater and textile wastewater, including some pharmaceutical wastewater and electroplating wastewater. The existing treatment biochemical process is "fine grid + cyclone grit chamber + adjustment, sedimentation tank + hydrolysis acidification tank + improved SBR + mechanical reaction tank flocculation tank + fiber filter D-type filter + ClO 2 Disinfection pool". Main influent water quality index COD Cr Average 250mg / L, NH 4 + -N average 51mg / L, total nitrogen average 71mg / L. COD of effluent after treatment by existing process Cr Average 47mg / L, NH 4 + -N average 13mg / L, total nitrogen average 22mg / L, NH 4 + -N, total nitrogen cannot meet the relevant effluent discharge standards. The combined process of "hydrolytic acidification tank + anoxic tank + micro-oxygen nitrosation tank + aerobic tank" was used to carry out the pi...

Embodiment 2

[0053] A chemical company has an annual production capacity of 120,000 tons of synthetic ammonia, 150,000 tons of urea, and 30,000 tons of methanol. During the production process, the company discharges about 1,700 m of ammonia nitrogen wastewater every day 3 . The combined process of "hydrolytic acidification tank + anoxic tank + micro-oxygen nitrosation tank + aerobic tank" was used to conduct pilot experiments on site, and the treatment scale of the pilot plant was 0.875m 3 / h, that is, the design wastewater treatment capacity of the pilot test process is 21m 3 / d. The anoxic pool, the micro-oxygen nitrosation pool and the aerobic pool were added with polyurethane sponge filler as the carrier, the hydrolytic acidification pool was inoculated with hydrolytic complex bacteria, Bacillus subtilis CM-A12, the anoxic pool was inoculated with denitrifying bacteria CM-NRD3, micro-oxygen subtilis The nitrification tank was inoculated with ammonia oxidizing bacteria CM-NRO14, and t...

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Abstract

The invention relates to a high-ammonia-nitrogen low-C/N-ratio wastewater treatment system and treatment technique, belonging to the technical field of wastewater treatment. The system comprises a hydrolysis acidification tank, an anoxic tank, a microaerobic nitrosification tank and an aerobic tank, wherein the hydrolysis acidification tank communicates with the anoxic tank; the anoxic tank is connected with the microaerobic nitrosification tank through a pipeline; the microaerobic nitrosification tank is connected with the aerobic tank through a pipeline; a nitrosification liquid reflux pipeline is arranged between the microaerobic nitrosification tank and the anoxic tank; and a nitrosification solution reflux pipeline is arranged between the aerobic tank and the anoxic tank. The treatment system and treatment technique have favorable enhancement effects on wastewater treatment and reconstruction of leather wastewater, synthetic ammonia and nitrogen fertilizer techniques, and are suitable for treating high-ammonia-nitrogen low-C/N-ratio wastewater. The treatment system and treatment technique have the advantages of favorable denitrification effect and low operating cost, and can achieve the goal of simultaneously removing ammonia nitrogen and total nitrogen.

Description

technical field [0001] The invention belongs to the technical field of waste water treatment, and in particular relates to a high ammonia nitrogen low C / N ratio waste water treatment system and a treatment process. Background technique [0002] As the shortage of water resources and the deterioration of water environment quality have increasingly become obstacles to social and economic development, it is necessary to improve the efficiency and degree of sewage treatment, strengthen the efficiency of nitrogen and phosphorus removal in sewage treatment plants, eliminate the root causes of eutrophication in water bodies, and reduce sewage treatment. cost has become a top priority. In recent years, the State Environmental Protection Administration has issued an increase in sewage discharge standards, and the quality of effluent water from various sewage treatment plants has also been improved accordingly. However, insufficient carbon sources and poor nitrogen removal effects are...

Claims

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Application Information

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IPC IPC(8): C02F3/30
CPCC02F3/305
Inventor 赵鸭美谢柳周俊利
Owner 湖州至美生物科技有限公司
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