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Treatment method of anaerobic fermentation biogas slurry from livestock and poultry raising

A technology of anaerobic fermentation and biogas slurry treatment, applied in chemical instruments and methods, multi-stage water/sewage treatment, water/sludge/sewage treatment, etc. Unbalance and other problems, to achieve the effect of improving water quality, simple and easy process, and low cost

Inactive Publication Date: 2012-10-03
TONGJI UNIV
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AI Technical Summary

Problems solved by technology

The pollutant load of biogas slurry is high, the carbon-nitrogen ratio is unbalanced, and the treatment is difficult. At present, various researches are committed to finding a simple, easy, and low-cost anaerobic fermentation biogas slurry treatment process for livestock and poultry breeding.

Method used

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  • Treatment method of anaerobic fermentation biogas slurry from livestock and poultry raising
  • Treatment method of anaerobic fermentation biogas slurry from livestock and poultry raising

Examples

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Embodiment 1

[0015] Example 1: Take the pilot test of anaerobic fermentation biogas slurry treatment in a chicken farm in Shanghai as an example.

[0016] Fresh chicken manure is diluted with water and passed through a vibrating screen to remove impurities such as chicken feathers, and then enters a fully mixed fermentation tank for fermentation to produce biogas. The water quality conditions of the effluent anaerobic fermentation biogas slurry are measured as follows: the average COD is 9200mg / L, the average ammonia nitrogen is 2700mg / L, The average total phosphorus is 100mg / L, and the average SS is 7000mg / L. It is high-concentration wastewater with high organic load, high ammonia nitrogen and high phosphorus load, and the carbon and nitrogen ratio is low.

[0017] After the biogas slurry enters the storage tank 1, lime is added to adjust the pH to 12, and the water is fed from the top of the ammonia stripping column 3 through the water pump 2. The column is filled with hollow ball packin...

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Abstract

The invention relates to a treatment method of anaerobic fermentation biogas slurry from livestock and poultry raising. After pH adjustment, the anaerobic fermentation biogas slurry enters an ammonia blow-off column for ammonia nitrogen pretreatment; after pH adjustment, the effluent enters a SBR pool for biochemical treatment; easily-degraded COD is removed through microbial metabolism in the SBR pool; ammonia and nitrogen are further removed through nitrification and denitrification; and total phosphorus is also removed partially; SBR effluent enters a coagulation slanting board sedimentation pool to complete removal of difficultly-degraded organic matter and residual total phosphorus. The invention provides simple, high-efficient, highly-applicable, and standard treatment technology ofanaerobic fermentation biogas slurry from livestock and poultry raising.

Description

technical field [0001] The invention relates to a wastewater treatment method, in particular to a livestock and poultry breeding anaerobic fermentation biogas slurry treatment method. Background technique [0002] The use of biogas technology to treat livestock and poultry breeding waste can not only control environmental pollution, but also realize waste recycling, and achieve better energy, environmental protection and economic benefits. Therefore, my country's large and medium-sized biogas projects are currently showing unprecedented growth momentum, but the disposal of anaerobic fermentation biogas slurry in biogas projects is still a worry for many construction units. Biogas slurry is produced in a large amount, and it is difficult to consume and utilize it locally. Long-distance transportation consumes a lot of energy and costs, and random discharge will cause secondary pollution to the environment. At present, biogas slurry disposal methods and technologies at home a...

Claims

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Application Information

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IPC IPC(8): C02F9/14
Inventor 王峰杨海真严潇南陈新马玉欣罗助强徐懿
Owner TONGJI UNIV
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