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A kind of cadmium-tolerant anammox granular sludge cultivation method

A technology of anaerobic ammonium oxidation and granular sludge, applied in anaerobic digestion treatment, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve cell DNA damage, protein peroxidation, biological treatment system and ecological System threats and other issues to achieve the effect of improving tolerance and achieving stable performance

Active Publication Date: 2022-03-08
HANGZHOU NORMAL UNIVERSITY
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Problems solved by technology

Cadmium can degrade the performance of the biological treatment system by inhibiting the activity of enzymes and interfering with the metabolism of microorganisms. Once cadmium enters the cells, it will cause cellular DNA damage and protein peroxidation, which poses a potential threat to the biological treatment system and ecosystem

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  • A kind of cadmium-tolerant anammox granular sludge cultivation method
  • A kind of cadmium-tolerant anammox granular sludge cultivation method
  • A kind of cadmium-tolerant anammox granular sludge cultivation method

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Embodiment Construction

[0034] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. It should be understood that these examples are only used to illustrate the present invention and are not intended to limit the scope of the present invention. The operating methods not indicated in the following examples are generally in accordance with conventional conditions, or in accordance with the conditions suggested by the manufacturer.

[0035] Take an upflow anaerobic sludge bed reactor with an effective volume of 0.5L, and inoculate the anammox granular sludge. The volatile suspended solids concentration of the anammox granular sludge is 1.71g L -1 , the dominant bacterium was Candidatus Kuenenia.

[0036] With simulated wastewater as influent, the reactor operates under the conditions of anaerobic, constant temperature of 35±1°C, and hydraulic retention time of 0.68h. The composition of the simulated wastewater is: cadmium 1~5mg L ...

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Abstract

The invention discloses a method for cultivating cadmium-tolerant anaerobic ammonium oxidation granular sludge, comprising: (1) inoculating anaerobic ammonium oxidation granular sludge in a reactor to contain ammonia nitrogen, nitrite nitrogen, inorganic salts, The simulated wastewater of trace elements and cadmium was used as influent water, and it was run to stability under anaerobic conditions with a temperature of 31-36°C and a constant hydraulic retention time; 15 to 35 days, until the removal rate of total nitrogen in the effluent of the reactor is 60% to 70%; (3) stop the addition of cadmium in the influent, and at the same time gradually reduce the concentration of ammonia nitrogen and nitrite nitrogen in the influent, each gradient The operation time is 3 to 20 days, and the removal rate of total nitrogen in the effluent of the reactor is greater than 80%; (4) Add cadmium in the influent water again, and the operation time of each gradient is 5 to 15 days, and run to the reactor The total nitrogen removal rate of the effluent is not less than 70%, and the cadmium-tolerant anammox granular sludge cultivation is realized.

Description

technical field [0001] The invention relates to the technical field of granular sludge cultivation, in particular to a cadmium-tolerant anaerobic ammonium oxidation granular sludge cultivation method. Background technique [0002] Anaerobic ammonium oxidation is a new biological denitrification process that uses nitrite as an electron acceptor to directly oxidize ammonia into nitrogen. It is one of the most important discoveries in recent years that the microbial nitrogen cycle has been discovered. Anammox bacteria are distributed in various natural habitats such as marine ecosystems, inland lakes and agricultural soils, and account for 9%-40%, 4%-37% and 50% of nitrogen loss, respectively. Compared with the traditional biological denitrification process, anaerobic ammonium oxidation has the advantages of low operating cost, small footprint, less sludge production, and high denitrification efficiency. It plays an indispensable role in wastewater denitrification treatment, an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/28C02F3/34C02F101/10C02F101/16C02F101/20
CPCC02F3/28C02F3/34C02F2101/166C02F2101/16C02F2101/10C02F2101/20C02F2209/02C02F2209/44C02F2305/06C02F2209/16
Inventor 金仁村胥莲曾籍马文杰金路洋赵一鸿张江涛王晨洁
Owner HANGZHOU NORMAL UNIVERSITY