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Culture method for chromium-resisting anaerobic ammonia oxidation granule sludge

An anaerobic ammonia oxidation and granular sludge technology, applied in anaerobic digestion treatment, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve the problems of inhibiting denitrification microorganisms, lethality, etc., and achieve improved sedimentation performance , the effect of broadening the application field

Active Publication Date: 2016-07-13
HANGZHOU NORMAL UNIVERSITY
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Problems solved by technology

However, highly toxic Cr 6+ A small amount will inhibit the activity of denitrification microorganisms or even kill them

Method used

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  • Culture method for chromium-resisting anaerobic ammonia oxidation granule sludge
  • Culture method for chromium-resisting anaerobic ammonia oxidation granule sludge
  • Culture method for chromium-resisting anaerobic ammonia oxidation granule sludge

Examples

Experimental program
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Embodiment 1

[0022] The composition of the simulated wastewater is: ammonia nitrogen 280mg L -1 , nitrous nitrogen 280mg·L -1 , KH 2 PO 4 10mg·L -1 , CaCl 2 2H 2 O7.4mg·L -1 , MgSO 4 2H 2 O300mg·L -1 , KHCO 3 1250mg·L -1 , the solvent is water.

[0023] In continuous flow, an upflow anaerobic sludge bed reactor ( figure 1 ), and the sludge biomass represented by volatile suspended solids concentration VSS at 35±1°C is 16.7g·L -1 , the culture activity was 159mgN·g -1 VSS·d -1 The anaerobic ammonium oxidation granular sludge was used as the inoculation source, with a content of 280mg·L -1 Ammonia nitrogen and 280mg·L-1 The simulated waste water of nitrous nitrogen is influent, the hydraulic retention time is 1h, and the sludge is cultivated under the conditions of anaerobic, dark, and influent pH of 8.10±0.14.

[0024] Set up two upflow anaerobic sludge bed reactors with an effective volume of 1.0L (such as figure 1 ) as the control group and the test group. The control gr...

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Abstract

The invention provides a culture method for chromium-resisting anaerobic ammonia oxidation granule sludge.The method comprises the steps that an up-flow type anaerobic sludge bed reactor is adopted, anaerobic ammonia oxidation granule sludge is adopted as an inoculating source, model wastewater containing ammonia nitrogen and nitrite is used as feed water, culture is performed on the condition that the anaerobic and light shielding environment is provided, the temperature is 35+ / -1 DEG C, the feed water pH is 8.10+ / -0.14 and the hydraulic retention time is 1.0-1.5 h till the nitrogen removal efficiency is stabilized to be 80% or above, then K2CrO4 is added into the feed water in the reactor for chromium-resisting culture, and culture of the chromium-resisting anaerobic ammonia oxidation granule sludge is finished.The chromium-resisting anaerobic ammonia oxidation granule sludge cultured through the method can maintain the high activity and nitrogen removal rate in the process of treating wastewater containing low-concentration chromium, can also remove low-concentration chromium in the wastewater, and is good in granule sludge character.

Description

(1) Technical field [0001] The invention relates to a method for cultivating chromium-resistant anaerobic ammonium oxidation granular sludge. (2) Background technology [0002] As a new biological denitrification process, anaerobic ammonium oxidation has broad application prospects in the field of biological denitrification of wastewater due to its advantages of high efficiency and low consumption. And it is the anammox bacteria that take on the core role of this process. [0003] The anaerobic ammonium oxidation biological nitrogen removal process has been successfully applied to the treatment of a variety of practical wastewater, including the treatment of heavy metal wastewater. Chromium is a toxic heavy metal widely used in industry. Chromium-containing wastewater mainly comes from mineral processing, chemical industry, tanning, electroplating and other industries. Chromium in water mainly exists in the form of trivalent chromium and hexavalent chromium, and the key pol...

Claims

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Application Information

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IPC IPC(8): C02F3/28C02F3/34C02F101/22C02F101/16
CPCC02F3/28C02F3/2846C02F3/34C02F2101/16C02F2101/22
Inventor 金仁村姜晓燕徐佳佳朱晓玲史志坚俞志明
Owner HANGZHOU NORMAL UNIVERSITY
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