Culture method for high-performance synchronously denitrifying and desulphurizing anaerobic sludge

An anaerobic sludge and culture method technology, applied in anaerobic digestion treatment, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve problems such as damage to the survival of aquatic plants and other organisms, acidification and eutrophication, etc. , to achieve the effect of enhancing operation stability, fast settling speed and improving efficiency

Active Publication Date: 2018-12-21
HANGZHOU NORMAL UNIVERSITY
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Problems solved by technology

[0002] Release of excess nitrogen into aquatic systems causes acidification and eutrophication problems, and also impairs the survival of aquatic plants and other organisms

Method used

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  • Culture method for high-performance synchronously denitrifying and desulphurizing anaerobic sludge
  • Culture method for high-performance synchronously denitrifying and desulphurizing anaerobic sludge
  • Culture method for high-performance synchronously denitrifying and desulphurizing anaerobic sludge

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Embodiment 1

[0025] Under continuous flow conditions, an upflow anaerobic sludge bed reactor with an effective volume of 0.8L is used, and the anaerobic ammonium oxidation granular sludge cultivated at a constant temperature of 35°C is used as the inoculation sludge. The denitrification performance of the inoculation sludge is as high as 18.6kg·m -3 d -1 , the amount of inoculated sludge is 80% of the effective volume of the reactor. At the same time, with 60mg·L -1 Na 2 S·9H 2 O's culture medium A and containing 18mg·L -1 NaNO 2 The culture medium B of each medium was fed independently (in order to avoid substrate reaction and sulfide precipitation, the strategy of separating different culture liquids was adopted for the reactor water intake, and the pH of the water intake was not adjusted), and the hydraulic retention time of the reactor was controlled to 8h. The molar ratio of nitrite to sulfide is 2:3, and the operation is stable for 10 days.

[0026] The composition of culture ...

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Abstract

The invention discloses a culture method for high-performance synchronously denitrifying and desulphurizing anaerobic sludge. The method comprises the following steps: inoculating anaerobic ammonia oxidized granular sludge into an up-flow type anaerobic sludge bed reactor, adjusting substrate concentration and hydraulic retention time, and running till the removal efficiency of both sulfide and nitrite in effluent reaches up to above 90%, thereby acquiring the synchronously denitrifying and desulphurizing anaerobic sludge. Taking autotrophic denitrification sludge as the inoculating sludge canstart an anaerobic ammonia oxidation technology, and anaerobic ammonium oxidation bacteria and some chemoautotrophic denitrifying bacteria can coexist in a bioreactor; the anaerobic ammonium oxidation bacteria and the denitrifying bacteria are autotrophic bacteria and both require no additional carbon source, so that additional carbon source for maintaining a survival condition of microorganismsneed not be considered during a starting period, no chemical sludge is generated and the method is economical and environment-friendly; the maximal removal loads of sulfide and nitrite finally acquired according to the invention respectively reach up to 105.5kg.m-3.d-1 and 28.45kg.m-3.d-1.

Description

(1) Technical field [0001] The invention relates to a high-performance synchronous anaerobic denitrification and sulfur removal sludge cultivation method, which belongs to the technical field of wastewater biological treatment. (2) Background technology [0002] The release of excess nitrogen into aquatic systems causes acidification and eutrophication problems, and also impairs the survival of aquatic plants and other organisms. Some industries produce a large amount of sulfides, such as viscose rayon factories, petrochemical factories, tanneries, etc. Sulfide has various toxic effects on the human body, and it can also corrode concrete and steel. Therefore, there is an urgent need to develop effective technologies for the removal of nitrogen and sulfide from the liquid phase. [0003] The removal of sulfide and nitrogen from wastewater by biological processes has many positive advantages over physical and chemical methods, including operating under natural environmental ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/28C02F101/10
CPCC02F3/2846C02F2101/101
Inventor 金仁村史志坚胥莲曾籍程雅菲吴丹陈成张富越
Owner HANGZHOU NORMAL UNIVERSITY
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