A method for filtering aquaculture wastewater by using straw powder
A technology for aquaculture wastewater and straw powder, which is applied in chemical instruments and methods, animal husbandry wastewater treatment, application, etc., can solve the problems of difficult practical application of technology, high cost of high concentration aquaculture wastewater treatment, and achieve low operating cost and energy consumption little effect
Inactive Publication Date: 2016-08-17
NORTHEAST AGRICULTURAL UNIVERSITY
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[0003] The purpose of the present invention is to address the problems in the above-mentioned prior art, and to design and provide a method for filtering aquaculture wastewater by using straw powder, so as to solve the problems of high treatment cost of high-concentration aquaculture wastewater and difficult practical application of the technology
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[0007] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. A method for filtering aquaculture wastewater by using straw powder. The method is as follows: firstly, the corn straw is pulverized into straw powders with three different particle sizes of 20mm, 10mm and 5mm, and three filter layers are respectively constructed with the three kinds of straw powders with different particle sizes. The thickness of the filter layer with a particle size of 20mm is 200-300mm, the thickness of the filter layer with a particle size of 10mm is 100-150mm, and the thickness of the filter layer with a particle size of 5mm is 50-80mm. cr After the aquaculture wastewater of 5000-15000mg / L was filtered through three layers of straw powder filter layers in turn, the total solid content of the aquaculture wastewater decreased to 04-06%, COD cr Between 1000-5000mg / L, aerobic aeration treatment is adopted to complete the standard disc...
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The invention discloses a method for filtering breeding waste water through straw powder, and belongs to the technology of breeding waste water processing. The method includes the steps that maize straw is smashed into the straw powder with the three different grain sizes including 20 mm, 10 mm and 5 mm, and three different filtering layers are built through the straw powder different in grain size respectively, wherein the thickness of the filtering layer which is 20 mm in grain size ranges from 200 mm to 300 mm, the thickness of the filtering layer which is 10 mm in grain size ranges from 100 mm to 150 mm, and the thickness of the filtering layer which is 5 mm in grain size ranges from 50 mm to 80 mm; after adsorbed and filtered through the three straw powder layers, the breeding waste water is processed in an aerobic aeration mode, and standard-met discharging processing or recycling of the breeding waste water is completed. By means of the method, agriculture and animal husbandry organic waste is comprehensively used, and the method has the advantages of being low in cost and low in operation energy consumption.
Description
technical field [0001] The invention belongs to aquaculture wastewater treatment technology, and mainly relates to a method for filtering aquaculture wastewater by using straw powder. Background technique [0002] At present, the harmless treatment of livestock and poultry breeding wastewater is a major problem in the development of animal husbandry. For high-concentration aquaculture wastewater with COD between 5000-15000mg / l, the currently widely used treatment methods are derived from sewage treatment technology. The mainstream is anaerobic fermentation combined with aerobic aeration treatment methods. The main problem is: the concentration of influent water And the organic load should not be too high. Too high organic load will lead to the problems of biofilm blockage, long hydraulic retention time and low treatment efficiency. Even if it operates normally, the cost of aquaculture sewage treatment will reach 8-10 yuan / t. This technology is difficult to practice. Opera...
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IPC IPC(8): C02F9/14
CPCC02F1/286C02F3/02C02F9/00C02F2103/20C05F3/00
Inventor 关正军范金霞杨一盈王珊
Owner NORTHEAST AGRICULTURAL UNIVERSITY