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Culture method of denitrification granular sludge for wastewater treatment

A technology of nitrification and denitrification particles and cultivation methods, which is applied in the field of cultivation of denitrification and denitrification granular sludge in wastewater treatment, can solve the problems of low denitrification efficiency and high energy consumption, and achieve good settling performance, large particle size and stable performance Effect

Active Publication Date: 2021-02-12
博瑞德环境集团股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional denitrification sludge denitrification has problems such as low denitrification efficiency and high energy consumption. Compared with traditional denitrification flocculent sludge denitrification, cultivating denitrification denitrification granular sludge will effectively remove COD and Nitrate nitrogen and granular sludge have the advantages of good settling performance, high biological concentration, low operating cost and energy consumption, high impact load resistance and strong anti-toxicity, and can save floor space, chemical usage, power consumption, and sludge Disposal and other expenses

Method used

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  • Culture method of denitrification granular sludge for wastewater treatment

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Experimental program
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Effect test

Embodiment 1

[0017] Denitrification and denitrification granular sludge reactor (effective volume 16L) was used to carry out the denitrification granular sludge cultivation test, and the denitrification flocculent sludge domesticated from the sewage treatment plant was inoculated into the denitrification and denitrification granular sludge reactor. Taking the simulated wastewater as the influent, the sludge concentration of the reactor after inoculation was 5.0g / L, and the simulated wastewater NO 3 - -N initial value is 1,000mg / L, COD initial value is 4,000mg / L, control COD concentration and NO 3 - -The ratio of N concentration is 4 to 1, and the culture is carried out under the condition of avoiding light and anaerobic while monitoring NO 3 - -N effluent situation, the culture temperature of the reactor is 32°C, the pH value is 3.5, and the hydraulic retention time is 1d. The simulated wastewater includes COD, NO 3 - -N, phosphate and trace elements Mn, Co, Cu, Zn, Ni, Mo, Se.

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Embodiment 2

[0021] Denitrification and denitrification granular sludge reactor (effective volume 16L) was used to carry out the denitrification granular sludge cultivation test, and the denitrification flocculent sludge domesticated from the sewage treatment plant was inoculated into the denitrification and denitrification granular sludge reactor. Taking the simulated wastewater as the influent, the sludge concentration of the reactor after inoculation was 5.0g / L, and the simulated wastewater NO 3 - -N initial value is 1,500mg / L, COD initial value is 7,500mg / L, control COD concentration and NO 3 - -The ratio of N concentration is 5, and the cultivation is carried out under the condition of avoiding light and anaerobic while monitoring NO 3 - -N effluent situation, the cultivation temperature of the reactor is 28°C, the pH value is 6.5, and the hydraulic retention time is 2d. The simulated wastewater includes COD, NO 3 - -N, phosphate and trace elements Mn, Co, Cu, Zn, Ni, Mo, Se.

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Abstract

The invention discloses a culture method of denitrification granular sludge for wastewater treatment. The method comprises the following steps: inoculating denitrificationflocculent sludge domesticated by a sewage treatment plant into a denitrification granular sludge reactor, controlling the ratio of COD concentration to NO3-N concentration by taking simulated wastewater as inlet water, culturingunder anaerobic conditions, meanwhile, monitoring the effluent condition of NO3-N, on the premise that the removal rate of NO3-N is kept at 80% or above, continuously increasing the concentration ofCOD and NO3-N in inflow water till the concentration of COD and NO3-N reaches a certain value, and when the removal rate of NO3-N reaches 90% or above, adjusting the retention time of the reactor until the removal rate of NO3-N in effluent reaches 95% or above so as to obtain the denitrification granular sludge for wastewater treatment. The denitrification granular sludge cultured by the method has the advantages of good settling performance, high biological concentration, low operation cost and energy consumption, high impact load resistance, strong anti-toxicity effect and the like, the operation cost and energy consumption of a reactor are reduced, and the cultured granular sludge can be used for treating high-COD and high-NO3-N wastewater.

Description

technical field [0001] The invention belongs to a cultivation method of granular sludge, in particular to a cultivation method of wastewater treatment denitrification and denitrification granular sludge. Background technique [0002] The feasibility and economy of biological denitrification are superior to other processes, and the key to biological denitrification lies in denitrification. The denitrification process is the process in which denitrifying bacteria reduce nitrogen in nitrate to nitrogen gas through a series of intermediate products. When the organic wastewater contains high concentrations of COD and nitrate nitrogen, when the wastewater is treated with constant temperature and anaerobic method, the flocculent denitrification sludge will gradually become granulated. Traditional denitrification sludge denitrification has problems such as low denitrification efficiency and high energy consumption. Compared with traditional denitrification flocculent sludge denitri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/28C02F101/16
CPCC02F3/28C02F2101/163Y02W10/10
Inventor 吴华明王颖王丽梅李丽姚海勇宗春香郭娜蔡旅程
Owner 博瑞德环境集团股份有限公司
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