Device and method for synchronously treating nitrite nitrogen wastewater and excess sludge
A technology of nitrite nitrogen and excess sludge, applied in biological treatment devices, water pollutants, special treatment targets, etc., can solve the problems of difficult to expand the scale, complicated and expensive work, and achieve a good reaction environment and conditions. , avoid energy waste, the effect of sufficient carbon source
Inactive Publication Date: 2021-06-22
BEIJING UNIV OF TECH
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Finally, the released organic matrix is used as a carbon source and then put into the biological denitrification system to complete the sewage denitrification process. This work is complicated and expensive, so it is difficult to scale up.
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[0018] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0019] A device for synchronously treating nitrite nitrogen wastewater and excess sludge, comprising a raw water tank (1), a sludge storage tank (2), and a sludge fermentation-coupled denitrification SBR reactor (3). The sludge fermentation coupled denitrification reactor is equipped with a water inlet peristaltic pump (3.1), a mud inlet peristaltic pump (3.2), a stirring device (3.3), a heating device (3.4), an online monitoring device (3.5) and a PLC automatic control system ( 3.6).
[0020] The raw water tank (1) is equipped with an overflow pipe (1.1), a first vent valve (1.2), and a first water outlet (1.3), and the first water outlet (1.3) of the raw water tank (1) passes through the water inlet peristaltic pump (3.1) It is connected with the first water inlet (3.6) of the sludge fermentation coupled denitrification reactor (3)...
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The invention discloses a device and a method for synchronously treating nitrite nitrogen wastewater and excess sludge, and belongs to the field of biological denitrification and sludge fermentation utilization. The device is provided with a raw water tank, a sludge storage tank and a sludge fermentation coupling denitrification SBR reactor. The method comprises the following steps: high-concentration nitrite nitrogen wastewater and exogenous excess sludge are pumped into a fermentation coupling denitrification reactor together to serve as a nitrite nitrogen protonation form, free nitrous acid (HNO2) promotes excess sludge fermentation reduction, a carbon source released in the sludge fermentation process is further obtained and utilized by denitrifying bacteria, and proceeding of the denitrification process (NO2->N2) is promoted. Denitrification is a process of generating alkalinity, the online monitoring device obtains statistical pH data in real time, and stirring is stopped when a pH curve stops rising or an obvious inflection point appears. The method is suitable for synchronous treatment of high-concentration nitrite nitrogen wastewater (greater than 1500 mg / L) and excess sludge, deep treatment of the nitrite nitrogen wastewater is completed under the condition that no external source is added, and fermentation reduction of external source excess sludge is realized.
Description
technical field [0001] The invention relates to a device and method for synchronously treating nitrite nitrogen wastewater and excess sludge, and belongs to the technical field of biological denitrification and sludge fermentation and utilization. Background technique [0002] The remaining sludge is a by-product of the sewage treatment process, and its treatment and disposal costs account for 60% of the total operating cost of the sewage treatment plant. The remaining sludge contains a large amount of organic matter (protein, carbohydrate, lipid, fat and DNA, etc.), after a series of fermentation steps such as dissolution-hydrolysis-acidification-acetification, the contained organic matter can be released into the sludge supernatant, It is regarded as a high-quality carbon source by microorganisms, supplements the electron donor needed in the denitrification process, and solves the problem of insufficient carbon source in the sewage that is common in the process of sewage t...
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IPC IPC(8): C02F3/28C02F11/04C02F101/16
CPCC02F3/28C02F11/04C02F2101/166C02F2203/006C02F2209/06C02F2303/06
Inventor 彭永臻张方斋王众姜浩任尚邱金港
Owner BEIJING UNIV OF TECH