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Method for treating waste water of livestock and fowl cultivation

A livestock and poultry breeding wastewater and treatment method technology, applied in the field of wastewater treatment, can solve the problems of high cost of biogas collection system, influence on aerobic treatment effect, and high requirements for operators, and achieve good operability, stable treatment effect, and process simple effect

Inactive Publication Date: 2008-03-26
SHENZEN JDL ENVIRONMENTAL PROTECTION LTD +1
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Problems solved by technology

[0004] However, anaerobic treatment technology has its defects in the treatment of livestock and poultry manure wastewater: 1) anaerobic treatment is very sensitive to environmental factors such as temperature and pH, and has high requirements for operators, so it is not suitable for livestock farms; 2) livestock and poultry manure wastewater The high concentration of ammonia nitrogen will easily cause excessive acidification of the system in actual operation, and will also affect the effect of subsequent aerobic treatment; 3) Anaerobic treatment will produce a certain amount of biogas. Due to the high cost and high operation requirements of the biogas collection system, if it is directly discharged There are security risks

Method used

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  • Method for treating waste water of livestock and fowl cultivation

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Embodiment Construction

[0021] With reference to accompanying drawing 1 and 2, in the processing method of livestock and poultry breeding waste water of the present invention, after waste water enters regulating tank 1, balance water quality and water quantity; For example, the fan 4 and the aeration pipe 41 connected with it are aerated intermittently or regularly at a frequency of 1-3 times a day for the livestock wastewater to be treated, every 1-4 hours, to prevent the anaerobic odor of the wastewater. And homogenize the water quality and quantity of wastewater to be treated; then carry out the flocculation and sedimentation treatment of step b, the main function of this step is: add a small amount of PAC and PAM for flocculation, remove the suspended solids with small volume but large specific gravity in water; The residence time in the reaction primary sedimentation tank 2 generally needs to be between 2.0 and 4.0 hours, which is more appropriate to reduce the burden for subsequent processing st...

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Abstract

The process of treating animal raising waste water includes the following steps: aerating animal raising waste water through stirring in a regulating pond, flocculating and precipitating in a reacting preliminary sedimentation tank, biodegrading inside a membrane bioreactor with active sludge, filtering through ultrafiltering membrane, and discharging. The present invention combines the active sludge process and the membrane bioreactor process well to degrade animal raising waste water completely, and the treating process is simple and easy to operate.

Description

technical field [0001] The invention relates to a wastewater treatment method, in particular to a livestock and poultry breeding wastewater treatment method. Background technique [0002] The wastewater from livestock and poultry and house flushing mainly contains livestock and poultry manure, urine, etc., which are characterized by high concentrations of organic matter, suspended solids, ammonia nitrogen and other pollutants, and good biochemical properties. The amount of wastewater discharged by large-scale farms every day is large and concentrated, and in addition to the general pollutants in ordinary wastewater, the wastewater also contains other pollutants, such as heavy metals, residual veterinary drugs and pathogens. Therefore, if it is discharged into the environment or directly used for agriculture without treatment, it will cause serious pollution of the water body ecological environment or farmland. [0003] At present, in the field of livestock and poultry breed...

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Application Information

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IPC IPC(8): C02F9/14C02F3/02C02F1/52C02F3/12
CPCY02W10/10
Inventor 廖志民吴吉军黄玉和居德金郭景奎戴睿智史文彦魏旭万爱国
Owner SHENZEN JDL ENVIRONMENTAL PROTECTION LTD
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