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Pretreatment all-aerobic denitrification technology process and integrated device for of livestock and poultry breeding wastewater

A technology for livestock and poultry breeding wastewater and deoxygenation, which is applied in the field of water treatment, can solve problems such as high operating costs and difficulty in effectively solving wastewater treatment, and achieve the effects of wide application range, favorable reproduction and enrichment, and strong tolerance

Active Publication Date: 2019-02-22
重庆士继生态环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods improve the biodegradability and denitrification effect of the biogas slurry to a certain extent, but often at the cost of increasing the energy consumption and cost per unit of wastewater treatment. For large-scale farms with an average daily wastewater production of several hundred tons, the operating cost is too high. High, unable to afford, resulting in the long-term problem of wastewater treatment in livestock and poultry farms that is difficult to effectively solve

Method used

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  • Pretreatment all-aerobic denitrification technology process and integrated device for of livestock and poultry breeding wastewater
  • Pretreatment all-aerobic denitrification technology process and integrated device for of livestock and poultry breeding wastewater
  • Pretreatment all-aerobic denitrification technology process and integrated device for of livestock and poultry breeding wastewater

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Experimental program
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Effect test

Embodiment 1

[0066] The aquaculture wastewater of a pig farm in Qijiang, Chongqing is raw wastewater, and its water quality parameters are: COD concentration is 2680mg / L, ammonia nitrogen concentration is 534.7mg / L, total nitrogen concentration is 704.1mg / L, nitrate nitrogen concentration is 149.5 mg / L, Phosphate concentration is 15.5mg / L, pH: 7.2, raw water DO: 2.8mg / L. The room temperature is 25-28°C, the hydraulic retention time (HRT) is set to 24h, the rotation speed of the biological turntable is 34rpm / min, the corresponding disc linear velocity is 15m / min, and the dissolved oxygen concentration is 2-3 mg / L. Since the organic nitrogen content in the aquaculture wastewater is low, there is no need to pass through the ozone reaction zone, and there is no need to reflux. After the high-ammonia aquaculture wastewater is pretreated by the above method, ammonia nitrogen, organic matter and total nitrogen can be effectively reduced. The water quality before and after treatment is shown in T...

Embodiment 2

[0070] The wastewater from a dairy farm in Banan, Chongqing is raw water, and its water quality parameters are: COD concentration is 9028.7mg / L, ammonia nitrogen concentration is 760.4mg / L, total nitrogen concentration is 1140.6mg / L, nitrate nitrogen concentration is 155.1 mg / L , phosphate concentration is 18.3mg / L, pH: 7.4, raw water DO: 2.1mg / L. Due to the high content of organic nitrogen in dairy farm wastewater, the effluent from the aerobic reaction zone then enters the ozone reaction zone. The room temperature is 25-28°C, the hydraulic retention time (HRT) is set to 24h, the rotation speed of the biological turntable is 34rpm / min, the corresponding disc linear velocity is 15m / min, and the dissolved oxygen concentration is 2-3 mg / L. The dosing concentration of ozone is 6mg / L, the reaction time is 45min, and the reflux ratio of the effluent after oxidation to the front part of the biological turntable is 150%. The above-mentioned high-ammonia-nitrogen dairy farm breeding ...

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Abstract

The invention relates to a pretreatment all-aerobic denitrification technology process and an integrated device for of livestock and poultry breeding wastewater. According to the pretreatment all-aerobic denitrification technologyprocess, high-temperature-resistance COD, high-temperature-resistance ammonia nitrogen, and low-temperature-resistance heterotrophic nitrification-aerobic denitrificationfunctional bacteria with the high denitrification efficiency are adopted for biofilm culturing of a bacteria solution, starting of the integrated device is completed, the device starting period is shortened, and the conditions are created for enrichment of the functional bacteria. According to the method, main pollutants in wastewater raw water are subjected to pretreatment pretreated from the source of the breeding wastewater, and as for the treated livestock and poultry breeding wastewater, the water quality can meet the inflow water quality requirements (the COD is less than 2000 mg / L, andNH4<+>-N is less than 200 mg / L) of a subsequent conventional water treatment technologyprocess.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to a full aerobic denitrification process and integrated equipment for the pretreatment of livestock and poultry breeding wastewater. Background technique [0002] At present, wastewater pollution, especially livestock and poultry breeding wastewater pollution, has become the main source of agricultural non-point source pollution. Among them, livestock and poultry breeding wastewater belongs to suspended solids, organic pollutants and ammonia nitrogen "three high" organic wastewater. Due to the high cost and difficulty of treatment, a large amount of untreated breeding wastewater is often discharged directly, which has a great impact on rural ecology and the environment. wreak havoc. How to efficiently treat this type of wastewater has become a bottleneck restricting the development of large-scale livestock and poultry breeding. [0003] For large-scale farm wa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F103/20C02F101/16
CPCC02F1/78C02F3/02C02F3/08C02F3/302C02F3/34C02F2101/16C02F2103/20
Inventor 张千赵天涛艾铄刘向阳张丽杰
Owner 重庆士继生态环境科技有限公司
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