A permeable sulfur autotrophic denitrification biological wall to strengthen wastewater denitrification process
A technology of autotrophic denitrification and denitrification, applied in the direction of water pollutants, anaerobic digestion treatment, chemical instruments and methods, etc., can solve the problems of denitrification efficiency decline, etc., achieve strong applicability and practicability, and high operating costs , the effect of reducing processing costs
Active Publication Date: 2018-10-19
知和环保科技有限公司
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Problems solved by technology
[0004] The present invention is aimed at A / O or A 2 Insufficient organic matter in the anoxic section of the / O system causes a decrease in denitrification efficiency. The following technical scheme is proposed. A permeable biological wall is built in the anoxic denitrification tank, and polyethylene plastic balls are placed in it. The plastic balls are filled with elemental sulfur, and the polyethylene plastic balls are tightly arranged in the stainless steel frame
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[0009] Installed in an A / O wastewater treatment system as attached figure 1 The bio-wall shown has a thickness of 30cm; a hollow polyethylene plastic ball with a diameter of 5cm is placed in it, the surface of the sphere is covered with small holes with a diameter of 25 mesh, and the ball is filled with elemental sulfur with a particle size of 2mm; The spheres are closely arranged and fixed in the wall by a nylon net. When the nitrification solution flows back to the anoxic denitrification section, the residence time in the biological wall is 30 minutes.
[0010] Before and after the transformation, the changes in the system effluent indicators are shown in the table below. The denitrification process provided by the present invention has a strengthening effect on the denitrification in the anoxic section, thereby significantly improving the total nitrogen removal effect.
[0011]
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Abstract
The invention discloses a permeable sulfur-autotrophic denitrification bio-wall enhanced wastewater denitrification process and belongs to the field of application of water treatment. The process includes: building a bio-wall in an anaerobic denitrification pool in an A / O or A2 / O system, the bio-wall being supported with a stainless steel frame, placing hollow polyethylene plastic beads in the bio-wall, filling the polyethylene plastic beads with elemental sulfur, arranging the polyethylene plastic beads tightly in the stainless steel frame, fixing in the wall with steel wires or nylon mesh, with water on two sides of the wall capable of flowing in and out freely; the denitrification wall is filled with sulfur, the problem that an anaerobic segment has insufficient carbon source is solved, nitrate nitrogen and nitrite nitrogen are denitrified and reduced by sulfur-autotrophic bacteria in the bio-wall into nitrogen that dissipates in air, thereby enabling efficient denitrification. An existing A / O or A2 / O system is modified using the process, the anaerobic segment is free of additional carbon source, and the process has the advantages such as simplicity, low cost, ease of maintenance and high adaptability.
Description
technical field [0001] The invention belongs to the application field of water treatment technology, and relates to a waste water denitrification treatment process, in particular to a process for treating waste water with a sulfur autotrophic denitrification biological wall. Background technique [0002] Nitrogen pollution is an important reason for the deterioration of water quality. With the development of agricultural production and the acceleration of industrialization in our country, the total amount of sewage discharge continues to increase, and the problem of environmental pollution is becoming more and more serious. Domestic sewage and some industrial wastewater contain a certain amount of nitrogen, especially coal pressurized gasification wastewater, coking wastewater, nitrogen fertilizer wastewater, etc. A large amount of untreated or improperly treated nitrogen-containing wastewater is discharged into rivers, which will cause serious damage to the environment. Re...
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IPC IPC(8): C02F3/28C02F101/16
CPCC02F3/28C02F2101/16
Inventor 李海松阎登科
Owner 知和环保科技有限公司