BCO-SBBR-BAF-CW combination technology for processing pig farm biogas slurry

A technology of BCO-SBBR-BAF-CW combined process, which is applied in the field of environmental science and engineering, can solve the problems of large infrastructure investment, large land occupation, and large climate impact, and achieve low operating costs, small land occupation, and Guaranteed continuity of effect

Inactive Publication Date: 2014-07-30
NANCHANG UNIV
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  • Abstract
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Problems solved by technology

[0003] Biogas slurry treatment technologies include aerobic biological treatment, ecological treatment, etc. Aerobic biological treatment (such as Sequencing Batch Biofilm Reactor (SBBR) has the advantages of small footprint and good nitrogen and phosphorus removal effects, but there are High operating costs, large infrastructure investment and other issues, ecological treatment (such as: constructed wetlands) has the advantages of low infrastructure investment, certain denitrification and phosphorus removal effects, low operating costs, and simple operation, but it is also limited by the occupied area Large, greatly affected by climate, etc.

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  • BCO-SBBR-BAF-CW combination technology for processing pig farm biogas slurry

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Embodiment Construction

[0019] After anaerobic treatment of wastewater from a large-scale pig farm, biogas slurry CODcr, BOD 5 , SS, NH 3 -N and TP are respectively: 568~1810 mg / L, 112~326 mg / L, 268~749 mg / L, 366~1450 mg / L, 19.0~44.8mg / L, and the treatment scale is 150m 3 / d. The pig farm biogas slurry first flows into the regulating tank to remove some organic matter and suspended matter, and then is pumped to the denitrification area of ​​the BCO pool for denitrification reaction, and then flows into the nitrification area to further remove organic matter and carry out nitrification reaction, and overflows to the SBBR pool. The operation mode of SBBR is: aeration for 4 hours, anoxic for 2 hours, aeration for 4 hours, sedimentation for 1 hour, and drainage for 1 hour. The water flows into the BAF pool and artificial wetland for advanced treatment to further remove organic matter, nitrogen, phosphorus and suspended matter. CODcr, BOD in water after treatment by the device 5 , SS, NH 3 The averag...

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Abstract

The invention discloses a BCO-SBBR-BAF-CW combination technology for processing pig farm biogas slurry. Specifically, the pig farm biogas slurry is successively processed by a regulating tank, a bio-contact oxidation tank (BCO), a sequential batchbiofilm reactor (SBBR), a middle tank, a biological aerated filter (BAF) and constructed wetland (CW), and finally reaches the standard and is discharged. The technology is flexible in operation manner, simple in operation, relatively small in occupation area, and low in operation cost.

Description

technical field [0001] The invention relates to a combined treatment process capable of making large-scale pig farm biogas slurry discharge up to the standard, and belongs to the field of environmental science and engineering technology. Background technique [0002] The Bulletin of the First National Survey of Pollution Sources shows that the main water pollutants discharged by my country's livestock and poultry breeding industry are: 12.6826 million tons of chemical oxygen demand, 1.0248 million tons of total nitrogen, and 160,400 tons of total phosphorus. In 2012, my country's pork production accounted for 64% of the total meat production, and the pig breeding industry accounted for 47% of the total output value of the livestock and poultry breeding industry. Therefore, it is necessary to strengthen the management of pig wastewater. At present, most large-scale pig farms only have anaerobic treatment facilities (such as biogas digesters). Although most of the organic matte...

Claims

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Application Information

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IPC IPC(8): C02F9/14
Inventor 万莉万金保章洪涛
Owner NANCHANG UNIV
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