A method for cultivating fluoride-tolerant anaerobic ammonium oxidation granular sludge

A technology of anaerobic ammonium oxidation and granular sludge, applied in chemical instruments and methods, biological water/sewage treatment, water/sludge/sewage treatment, etc., can solve problems affecting biological activity and process performance, and increase load Effect

Active Publication Date: 2018-11-02
HANGZHOU NORMAL UNIVERSITY
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Problems solved by technology

In ANAMMOX systems, when fluoride is present and the concentration exceeds a certain value, it may affect biological activity and process performance

Method used

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  • A method for cultivating fluoride-tolerant anaerobic ammonium oxidation granular sludge

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Embodiment 1

[0020] The composition of the simulated wastewater is: ammonia nitrogen 140-280mg L -1 , Nitrite nitrogen 140~280mg·L -1 , KH 2 PO 4 10mg·L -1 , CaCl 2 2H 2 O 5.6mg·L -1 , MgSO 4 ·7H 2 O 300mg·L -1 , KHCO 3 1250mg·L -1 , the concentrations of trace elements Ⅰ and Ⅱ are respectively:

[0021] Trace elements Ⅰ (g L -1 ): EDTA 5, FeSO 4 ·7H 2 O 9.14.

[0022] Trace element Ⅱ (g L -1 ): EDTA 15, ZnSO 4 ·7H 2 O 0.43, CoCl 2·6H 2 O 0.24, MnCl 2 4H 2 O0.99, CuSO 4 ·5H 2 O 0.25, NaMoO 4 2H 2 O 0.22, NiCl 2 ·6H 2 O0.21, H 3 BO 4 0.014.

[0023] In continuous flow, an upflow anaerobic sludge bed reactor with an effective volume of 1 L (such as figure 1 ), with an activity of 0.211g TN·g -1 VSS·d -1 The anammox granular sludge was used as the inoculation source. The sludge concentration in the reactor after inoculation is 15-20g·L -1 . The operating conditions of the reactor are anaerobic, light-proof, temperature of 35±1°C, influent pH of 7.91±0.21, a...

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Abstract

The invention discloses a culture method of fluoride-tolerating anaerobic ammonium oxidation granular sludge. The method comprises the steps that an up-flow anaerobic sludge bed reactor is adopted, anaerobic ammonium oxidation granular sludge serves as an inoculation source, simulation waste water containing ammonia nitrogen and nitrite serves as inlet water, after operation is stable under anaerobic and light-shielding the conditions with the temperature of 35+ / -1 DEG C, the inlet water pH of 7.91+ / -0.21 and the hydraulic retention time of 0.74 h, fluoride is added into inlet water of the reactor in a phased increasing mode, the increasing amplitude of fluoride is 50 mg.L-1, and when the nitrogen removal rate reaches 2-6 kg.m-3.d-1, the fluoride-tolerating anaerobic ammonium oxidation granular sludge is obtained. According to the cultured anaerobic ammonium oxidation granular sludge, when the amount of F added to the simulation waste water is 400 mg.L-1, the granular sludge with the large grain size, high settling performance and high sludge activity can be cultured fast, so that loads of the reactor are increased effectively.

Description

(1) Technical field [0001] The invention relates to a method for cultivating anaerobic ammonium oxidation granular sludge, in particular to a method for cultivating fluoride-tolerant anaerobic ammonium oxidation granular sludge. (2) Background technology [0002] As a new type of high-efficiency biological denitrification process, anaerobic ammonium oxidation has brought light to the problems of low-carbon ratio wastewater denitrification, high energy consumption, and large sludge production faced by the sewage treatment industry with its advantages of high efficiency and low consumption. [0003] At present, the anammox biological nitrogen removal process has been successfully applied to treat a variety of wastewater. Among them, fluoride is ubiquitous in various industrial wastewater, such as: non-ferrous metallurgy, steel and aluminum processing, fertilizer and pesticide factories, etc. In ANAMMOX systems, when fluoride is present and the concentration exceeds a certain ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/30C02F3/34
CPCC02F3/307C02F3/341
Inventor 金仁村徐佳佳姬玉欣张正哲陈倩倩
Owner HANGZHOU NORMAL UNIVERSITY
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