Technology suitable for anaerobic treatment of swine wastewater

An anaerobic treatment and wastewater treatment technology, which is applied in anaerobic digestion treatment, animal husbandry wastewater treatment, biological water/sewage treatment, etc., can solve the problems of short hydraulic retention time and affect the treatment effect, so as to improve the degree of decomposition and increase Hydraulic retention time, effect of height reduction

Inactive Publication Date: 2019-07-23
ZHONGKAI UNIV OF AGRI & ENG
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Problems solved by technology

For large-scale pig wastewater treatment, due to the height restriction, the hydraulic retention time is short, which greatly affects the treatment effect

Method used

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Embodiment

[0015] The following are embodiments of the present invention:

[0016] Pig raising waste water volume: 1 ton / d, COD is 8624mg / L, BOD5 is 5600mg / L, TN is 394mg / L, phosphate is 98mg / L, present embodiment comprises the following steps:

[0017] 1. Cross-flow anaerobic fluidized bed, 6 meters long, 2 meters wide, 3 meters high, with an aspect ratio of 3, steel structure, fully enclosed.

[0018] 2. A partition wall is set in the middle, diversion walls are set at both ends, and water pumps are used to push water.

[0019] 3. Set up biogas outlet and slag outlet at the same time, which is convenient for biogas collection and utilization and future operation management.

[0020] 4. The main design parameters of cross-flow anaerobic fluidized bed: hydraulic retention time: 34d, push flow velocity: 0.35m / s, sludge concentration: 6000-8000mg / L.

[0021] 4. Treatment effect: COD dropped from 8624mg / L to 2008mg / L, and the removal rate was 76.72%; the total nitrogen concentration dropp...

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Abstract

The invention provides a technology suitable for anaerobic treatment of swine wastewater and belongs to the field of environmental protection. Traditional swine wastewater treatment technologies mostly adopt an up-flow type anaerobic fluidized bed, have a good treatment effect and are mature, but can only be suitable for small-scale swine wastewater treatment; for large-scale swine wastewater treatment, hydraulic retention time is short and the treatment effect is heavily affected to the limitation of height. A cross-flow type anaerobic fluidized bed is adopted to replace the traditional up-flow type anaerobic fluidized bed for swine wastewater treatment, the length-width ratio of the cross-flow type anaerobic fluidized bed is 2-10 times, a partition wall is arranged in the middle, guide walls are arranged at the two ends, and a thruster is arranged. The swine wastewater moves in the horizontal direction, so that the hydraulic retention time can be designed as required and is generally5-45 days, the swine wastewater treatment effect is guaranteed, meanwhile, project investment and construction difficulty can be reduced, and operational management is convenient. The technology is suitable for the anaerobic treatment of the swine wastewater with various water volumes and concentrations, and is also suitable for the anaerobic treatment of other organic wastewater, especially, theanaerobic treatment of the organic wastewater with high and medium concentration.

Description

technical field [0001] The present invention relates to an anaerobic treatment technology of pig raising wastewater, in particular to high-concentration and large-scale pig raising wastewater anaerobic treatment technology, and is also applicable to anaerobic treatment of other organic wastewater, especially anaerobic treatment of organic wastewater with high and medium concentration . Background technique [0002] Pig wastewater has high COD and ammonia nitrogen concentrations, and it is difficult to meet the discharge standards both technically and economically. Therefore, it is very necessary to research and develop pig-raising wastewater treatment technology with low investment, low operation cost and resourceful utilization. Most of the traditional pig-raising wastewater treatment technologies use upflow anaerobic fluidized bed, which has good treatment effect and mature technology, but it can only be applied to small-scale pig-raising wastewater treatment. For large-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/28C02F103/20
CPCC02F3/2833C02F2103/20
Inventor 简放陵
Owner ZHONGKAI UNIV OF AGRI & ENG
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