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Method for cultivating synchronous nitrogen and sulfur removal mixed flora

A technology of mixed flora and denitrification, applied in the direction of microorganism-based methods, methods using microorganisms, chemical instruments and methods, etc., can solve problems such as coexistence problems and neglect

Active Publication Date: 2019-08-13
浙江国泉生态环境有限公司
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Problems solved by technology

However, some existing wastewater biological denitrification and sulfur removal processes usually treat sulfur and nitrogen separately, or only focus on the removal of sulfide and nitrite, or the two-component removal of sulfide and nitrate, while ammonia salt, nitrite Triadic coexistence of nitrates and sulfides is ignored

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  • Method for cultivating synchronous nitrogen and sulfur removal mixed flora
  • Method for cultivating synchronous nitrogen and sulfur removal mixed flora

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Embodiment Construction

[0040] 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. For the experimental methods without specific conditions indicated in the following examples, the conventional conditions or the conditions suggested by the manufacturer are usually followed.

[0041] Take an upflow anaerobic sludge bed reactor with an effective volume of 0.8L and inoculate the anammox sludge. The concentration of volatile suspended solids in the anammox sludge is 2.82g L -1 , the dominant bacterium was Candidatus Kuenenia.

[0042] With simulated wastewater as influent, the reactor operates under the conditions of anaerobic, constant temperature of 35±1°C, and hydraulic retention time of 4h. In order to avoid the chemical reaction of the simulated wastewater before ente...

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Abstract

The invention discloses a method for cultivating a synchronous nitrogen and sulfur removal mixed flora. The method comprises the steps that anaerobic ammonium oxidation granular sludge is inoculated in a reactor, simulated wastewater containing ammonia nitrogen, nitrate nitrogen, sulfide, inorganic salt, trace elements and sodium bicarbonate is taken as influent water, the temperature is 30-36 DEGC, and the reactor runs to be stable under the anaerobic condition of controlling the hydraulic retention time to be constant; the cultivation of the synchronous nitrogen and sulfur removal mixed flora is completed by means of a method of increasing the concentration of the sulfide in the influent water gradually, decreasing the concentration of the ammonia nitrogen and nitrite gradually, then increasing the concentration of the sulfide gradually and finally shortening the hydraulic retention time in sequence. According to the method, the anaerobic ammonium oxidation sludge is adopted as a single inoculum, the synchronous nitrogen and sulfur removal mixed flora is cultivated by means of the step-by-step domestication method, and the treatment of the wastewater simultaneously containing the ammonia nitrogen, nitrate nitrogen and sulfide in chemical plants and the like is facilitated.

Description

technical field [0001] The invention relates to the technical field of sludge cultivation, in particular to a method for cultivating mixed bacterial groups for synchronous denitrification and sulfur removal. Background technique [0002] Nitrogen is a nutrient element in aquatic systems and an important part of the ecological cycle. Excessive nitrogen discharge will lead to water eutrophication and other problems. Sulfide has a huge impact on the human body and even the entire ecosystem due to its odor, corrosiveness and toxicity. Therefore, it is particularly important to remove nitrogen and sulfur before wastewater discharge. [0003] Compared with traditional physical and chemical methods, biotechnology is called "environmentally friendly" technology due to its low energy input and less chemical sludge generation. However, some existing wastewater biological denitrification and sulfur removal processes usually treat sulfur and nitrogen separately, or only focus on the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12N1/20C12N1/36C02F3/34C02F3/28C02F101/10C02F101/16C02F101/38C12R1/01
CPCC02F3/2846C02F3/34C02F3/345C02F2101/101C02F2101/16C02F2101/166C02F2101/38C02F2101/40C12N1/20C12N1/36
Inventor 金仁村胥莲曾籍夏雯静伍皖湘玉敏杰陈成赵依恒金路洋
Owner 浙江国泉生态环境有限公司
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