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A method for culturing denitrifying granular sludge resistant to copper ions

A technology for nitrifying granules and cultivation methods, applied in chemical instruments and methods, water/sludge/sewage treatment, anaerobic digestion treatment, etc., can solve problems such as impact, and achieve improved tolerance, excellent environmental benefits and social benefits , to achieve the effect of stable performance

Active Publication Date: 2019-02-05
HANGZHOU NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the performance of denitrification and denitrification is easily affected by unfavorable factors in wastewater, such as heavy metal ions such as copper and zinc

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020]Take an upflow anaerobic sludge bed reactor with an effective volume of 1L, and inoculate the mature denitrification granular sludge cultivated in the laboratory. The concentration of suspended solids and volatile suspended solids in the reactor after inoculation are 51.5g L -1 and 36.3g·L -1 , during the whole load lifting stage, NO in the effluent water for three consecutive days 3 - -When the concentration deviation of N is less than 10%, adjust the reactor operation by one of the following methods: (1) reduce the hydraulic retention time of the reactor, and the adjustment range is 15% of the original hydraulic retention time; (2) increase the water inflow NO 3 - The concentration of -N and organic matter, the increase range is the original NO 3 - -15% of the concentration of N and organic carbon; when the nitrogen removal rate of the reactor is less than 90%, the further load increase is stopped, and the operation of the reactor is adjusted by one of the followi...

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Abstract

The invention provides a cultivation method of denitrification granular sludge resistant to copper ions. The method includes: using an upflow anaerobic sludge blanket reactor, using the denitrification granular sludge as the inoculation sludge, using simulation wastewater containing the copper ions as the inlet water, and operating under a condition that temperature is 35+ / -1 DEG C, pH is 6.9-7.3 and hydraulic retention time is 2.4-5 hours and a light-absence and anaerobic condition. The cultivation strategy of the cultivation method includes a load increasing stage and a domestication stage, wherein in the load increasing stage, the hydraulic retention time and the concentration of nitrate and organic matter in the inlet water are changed to increase the load of the reactor; in the domestication stage, the copper ion concentration is constantly increased to fast domesticate the copper ion resistance of the denitrification granular sludge. The cultivation method has the advantages that the denitrification granular sludge cultivated by the method is high in copper ion resistance, and good reactor performance is achieved.

Description

(1) Technical field [0001] The invention relates to a method for cultivating denitrification granular sludge, in particular to a method for cultivating denitrification granular sludge tolerant to high-concentration copper ions. (2) Background technology [0002] Heavy metal copper (Cu) is an important industrial raw material, which is widely used in tanning, electroplating, metal processing and other industries. Among them, Cu in the wastewater discharged from metal processing and electroplating factories 2+ The highest content, the concentration can reach tens to hundreds of mg·L -1 . At the same time, copper-containing industrial wastewater enters the municipal sewage system, which in turn affects the operational performance of the wastewater biological treatment system. [0003] For the treatment of nitrogen pollution, biological denitrification is currently the most economical and effective treatment technology, and the denitrification process has been paid attention t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/28
CPCC02F3/2846C02F2305/06Y02E50/30
Inventor 金仁村陈倩倩陈辉张早早孙凡淇
Owner HANGZHOU NORMAL UNIVERSITY