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Processing device and processing method applicable to high-ammonia-nitrogen agricultural wastewater

A technology for agricultural wastewater and treatment equipment, which is applied in the field of high ammonia nitrogen agricultural wastewater treatment equipment, agricultural wastewater treatment equipment, and wastewater treatment equipment. efficient utilization, reduction of processing load, and obvious effect of removal

Inactive Publication Date: 2013-11-20
NANJING INST OF ENVIRONMENTAL SCI MINIST OF ECOLOGY & ENVIRONMENT OF THE PEOPLES REPUBLIC OF CHINA
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0009] The purpose of the present invention is to overcome the problem that the existing high ammonia nitrogen agricultural wastewater has poor nitrogen and phosphorus removal effect and cannot be discharged directly after treatment, and provides a treatment device and treatment method suitable for high ammonia nitrogen agricultural wastewater, which has high efficiency and low consumption, and can control High pollution efficiency and good environmental benefits

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  • Processing device and processing method applicable to high-ammonia-nitrogen agricultural wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] This example is located in a certain livestock and poultry wastewater treatment in Yixing City, Jiangsu Province: the average CODcr=3467.4mg / L of influent, NH 4 + -N=829.7mg / L, TP=22.7mg / L, SS=291.5mg / L, pH 8.64.

[0053] The processing device used in this embodiment is as figure 1 As shown, it includes an anaerobic sludge bed 1, and also includes a cylindrical electrolyzer 2, a tower biofilter 3, a two-phase nitrification tank 4, a subsurface flow artificial wetland 5, a lift pump 6, a biogas outlet 7, and a main electrode 8 , biological filler 9, gas pipeline 10, air pressure regulator 11, aeration device 12, bamboo silk filler 13, return pump 14, flow meter 15, wetland plant 16, waste water pipeline 17; one side of anaerobic sludge bed 1 passes The waste water pipe 17 is connected with one end of the cylindrical electrolyzer 2; the cylindrical electrolyzer 2 is connected with the top of the tower biofilter 3 through the waste water pipe 17; 4 connection; the two-p...

Embodiment 2

[0058] In this example, a certain livestock and poultry wastewater in Changzhou City, Jiangsu Province was treated. The processing device is the same as in Example 1, the difference between the processing device and the processing method is: the hydraulic retention time of the livestock and poultry wastewater to be treated in the anaerobic sludge bed 1 is 15h, and the main electrode 8 of the cylindrical electrolyzer 2 selects an iron electrode, The voltage is 25V. Under the action of an external electric field, reactions such as precipitation reaction, redox reaction, and hydrolysis reaction occur in the wastewater, and the CODcr and nitrogen and phosphorus loads in the wastewater are reduced; the wastewater pollutant load after anaerobic treatment and electrolytic treatment is buffered , the aerobic biological treatment process is carried out through the subsequent tower biofilter 3, wherein the filler is a microporous biological filter material with a bulk density of 800g / cm ...

Embodiment 3

[0064]This example treats rural domestic sewage (ammonia nitrogen 27mg / l, total nitrogen 39mg / l, total phosphorus 2.25mg / l) in a certain area of ​​the Taihu Lake Basin. The treatment device is the same as in Example 1, the difference between the treatment device and the treatment method is: the hydraulic retention time of the rural domestic sewage to be treated in the anaerobic sludge bed 1 is 12h, and the main electrode 8 of the cylindrical electrolytic cell 2 selects an iron electrode, The voltage is 20V. Under the action of an external electric field, reactions such as precipitation reaction, redox reaction, and hydrolysis reaction occur in the wastewater, and the CODcr and nitrogen and phosphorus loads in the wastewater are reduced; the wastewater pollutant load after anaerobic treatment and electrolytic treatment is buffered , the aerobic biological treatment process is carried out through the subsequent tower biofilter 3, wherein the filler is a microporous biological fil...

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Abstract

The invention discloses a processing device and a processing method applicable to high-ammonia-nitrogen agricultural wastewater, and belongs to the field of processing of agricultural wastewater. According to the processing device and the processing method, a cylindrical electrolytic bath is arranged between an anaerobic sludge bed and a tower-type biological filter, and has a significant buffer effect on pollution load of the agricultural wastewater; at the same time through the arrangement of a return system and a two-phase denitrifying tank, the water quality of effluent water and the stable operation of the system can be ensured; biogas produced by the anaerobic sludge bed can be reused into the two-phase denitrifying tank, not only carbon emissions to the environment can be reduced, but also the denitrification rate of the two-phase denitrifying tank can be improved through utilization of anaerobic denitrification effect of methane, recycling utilization of waste matters can be realized, and the concept of green environmental protection can be embodied. The processing device is convenient to operate and easy to maintain, has relatively low construction costs and maintenance costs, and has good popularization and application value.

Description

technical field [0001] The invention belongs to the field of agricultural wastewater treatment; in particular, it relates to a treatment equipment for agricultural wastewater, and more specifically, it relates to a treatment device and a treatment method suitable for high ammonia nitrogen agricultural wastewater, which refers to the ammonia nitrogen load of agricultural wastewater High, the effluent is difficult to reach the standard, and the wastewater treatment device is used to make it reach the standard. Background technique [0002] In recent years, with the development of my country's agriculture, the agricultural wastewater produced has caused new environmental pollution problems in our country. Agricultural wastewater includes rural domestic sewage, large-scale livestock and poultry breeding wastewater, and farmland runoff, etc. The environmental problems brought about by it have become increasingly serious. , the discharge of chemical oxygen demand has exceeded the s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F1/461
Inventor 叶海曾远严小飞李森张鉴王建国
Owner NANJING INST OF ENVIRONMENTAL SCI MINIST OF ECOLOGY & ENVIRONMENT OF THE PEOPLES REPUBLIC OF CHINA
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