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Technology for treating piggery wastewater by methane tank, biofilm reactor and artificial wetland

A biofilm reactor and artificial wetland technology, applied in the field of environmental engineering, can solve the problems of high cost, effluent water quality not meeting discharge requirements, unsatisfactory treatment effect, etc., to improve treatment capacity, improve nitrogen removal efficiency, and improve resistance Effect of Shock Load Capacity

Inactive Publication Date: 2010-10-20
NANCHANG UNIV
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Problems solved by technology

However, no matter which method the treatment effect is not ideal, or the effluent water quality does not meet the discharge requirements, or the cost is too high to be popularized and applied in my country, so a single sewage treatment technology is difficult to meet the economical and efficient treatment of large-scale pig farm wastewater Require

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  • Technology for treating piggery wastewater by methane tank, biofilm reactor and artificial wetland

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Embodiment Construction

[0019] Pig farm wastewater with a daily treatment capacity of 150m3 / d, raw water quality: COD 5000~10000mg / L, NH4+-N 400~1500mg / L TP30~100mg / L. The raw water enters the hydrolytic acidification tank, and then enters the biogas digester. The metabolic function of heterotrophic bacteria is used to decompose the refractory organic matter into easily biodegradable small molecule organic matter, and at the same time mineralize the organic nitrogen, and degrade and remove most of the easily biodegradable organic matter. However, the anaerobic part does not remove NH4+-N, but TN increases instead. The effluent from the biogas tank is COD 500-1000mg / L, NH4+-N 400-1500mg / L, and TP 50-150mg / L; the effluent from the biogas tank flows into the SBBR reactor, and the SBBR runs Working conditions and process conditions: water inflow for 1 hour, anaerobic for 3 hours, aerobic for 7 hours, sedimentation for 0.5 hours, drainage for 0.5 hours, SBBR effluent COD 300~400mg / L, NH4+-N 40~80mg / L TP 5~...

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Abstract

The invention discloses technology for treating piggery wastewater by a methane tank, a biofilm reactor and an artificial wetland. The technology comprises the following steps of: establishing a hydrolytic acidification tank, the methane tank, and a sedimentation tank in front of a sequencing batch biofilm reactor (SBBR) in turn; and establishing an aquatic emergent plant pool and an aquatic cash crop pool. The piggery wastewater flows from the hydrolytic acidification tank and flows out of the aquatic cash crop pool. The time parameters of the SBBR operating condition and technological condition are that: the time for water inlet is 1 hour, the time for anaerobic treatment is 3 hours, the time for aerobic treatment is 7 hours, the time for sedimentation is 0.5 hour, and the time for drainage is 0.5 hour. The wastewater subjected to comprehensive treatment reaches the emission standard.

Description

technical field [0001] The invention relates to the technical field of environmental engineering, in particular to a combined process for treating large-scale pig farm wastewater and discharging it up to standard. Background technique [0002] At present, there are three main modes of large-scale pig wastewater treatment: natural treatment, return to field treatment, and industrial treatment. For example, the sequencing batch biofilm reactor technology (SBBR) is widely used in the treatment of high-concentration and refractory sewage due to its small footprint, high treatment efficiency, and simple operation, especially for the removal of organic matter and suspended solids. . Constructed wetland technology has been widely used due to its low price, high N and P removal rate, easy management, and good environmental benefits. However, no matter which method the treatment effect is not ideal, or the effluent water quality does not meet the discharge requirements, or the cost...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F3/28C02F3/30C02F3/34C02F3/32C02F1/52C02F103/20
Inventor 万金保顾平吴永明熊继海
Owner NANCHANG UNIV
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