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Anaerobic granular sludge capable of reinforcing dechlorination performance and preparation method and application of anaerobic granular sludge

An anaerobic granular sludge and anaerobic sludge technology, applied in chemical instruments and methods, anaerobic digestion treatment, water/sludge/sewage treatment, etc., can solve the problems of unstable treatment effect and low dechlorination activity , to achieve the effect of enhanced reductive dechlorination performance, compact structure and stable particles

Inactive Publication Date: 2015-09-02
EAST CHINA UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using traditional fixed-bed reactors to treat chlorinated hydrocarbon wastewater, most of the granular sludge has problems such as low dechlorination activity and unstable treatment effect.

Method used

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  • Anaerobic granular sludge capable of reinforcing dechlorination performance and preparation method and application of anaerobic granular sludge
  • Anaerobic granular sludge capable of reinforcing dechlorination performance and preparation method and application of anaerobic granular sludge
  • Anaerobic granular sludge capable of reinforcing dechlorination performance and preparation method and application of anaerobic granular sludge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Preparation of anaerobic granular sludge with ZVI as subnuclei for enhanced degradation of tetrachlorethylene (PCE):

[0040] UASB reactor: The inner diameter of the reactor is 9cm, the height is 1m, and the effective volume is 6.3 liters. There is a settling chamber on the top and a three-phase separator outside;

[0041] The reactor inoculation sludge was taken from the anaerobic pool sludge of Shanghai Changqiao Sewage Treatment Plant, and the inoculation volume was 4.5L;

[0042] The total suspended solids (TSS) of the inoculated sludge was 7.16g / L, the volatile suspended solids (VSS) was 2.60g / L, and the VSS / TSS was 36.3%;

[0043] (1) Inoculate the anaerobic digester sludge from Shanghai Changqiao Sewage Treatment Plant into an upflow anaerobic sludge bed reactor (UASB), and feed it with glucose as substrate at 30°C Wastewater containing target pollutants (COD load range is 3000g m -3 d -1 ) Cultivate the inoculation sludge for 60 days, and the COD removal rate...

Embodiment 2

[0060] Using the same device as in Example 1, the preparation of anaerobic granular sludge with ZVI as the subnucleus for the enhanced degradation of trichloroethane (TCA) was carried out.

[0061] (1) The anaerobic digester sludge from Shanghai Changqiao Wastewater Treatment Plant was inoculated into the upflow anaerobic sludge bed reactor (UASB), and at 40°C, glucose was used as the substrate. Wastewater containing target pollutants (COD load range is 2500g m -3 d -1 ) Cultivate inoculated sludge for 40 days, and the COD removal rate of the reactor gradually reaches 90%;

[0062] Except for the target pollutants, the composition and content of the wastewater with glucose as the substrate are the same as those in Example 1.

[0063] The total suspended solids (TSS) of the inoculated sludge is 7g / L, the volatile suspended solids (VSS) is 3g / L, and the VSS / TSS is 40%;

[0064] (2) then zero-valent iron powder is dropped into described reactor, mixes with inoculation sludge, ...

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Abstract

The invention discloses anaerobic granular sludge capable of reinforcing dechlorination performance and a preparation method and an application of the anaerobic granular sludge. The anaerobic granular sludge capable of reinforcing the dechlorination performance comprises zero-valent iron and anaerobic sludge, wherein the anaerobic sludge is attached to the outer surface of the zero-valent iron and contains microbial thallus; and the anaerobic granular sludge capable of reinforcing the dechlorination performance can be applied to degradation of wastewater containing chlorinated hydrocarbon. The anaerobic granular sludge has the advantages of good settling property, stable granules, compact structure and efficient and stable reductive dechlorination activity; according to the granular sludge, functional flora such as reductive dechlorinating bacteria are effectively enriched; space obstacles in transferring of metabolic fluxes such as electron donors [H] and intermediate products are removed; and the reductive dechlorination performance of a UASB (upflow anaerobic sludge blanket) reactor is reinforced.

Description

technical field [0001] The invention relates to a granular sludge used for wastewater treatment and a preparation method thereof. Background technique [0002] Chlorinated hydrocarbons are widely used in many industries, because they are difficult to degrade in the environment, and have serious pollution in the environment such as groundwater and soil. Chlorinated hydrocarbons not only have triple effects and genotoxicity, but also have a strong toxic effect on the liver, kidney, cardiovascular and gastrointestinal organs of the human body, and also affect the central nervous system, which poses a serious threat to the ecological environment and human health. big threat. The traditional fixed bed reactor is used to treat chlorinated hydrocarbon wastewater. Most of the granular sludge has problems such as low dechlorination activity and unstable treatment effect. Therefore, it is necessary to strengthen the reductive dechlorination performance of the fixed bed reactor. Co...

Claims

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Application Information

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IPC IPC(8): C02F3/28C02F101/36
CPCY02E50/30
Inventor 李辉刘勇弟杨洁林匡飞周栋陈亚琴
Owner EAST CHINA UNIV OF SCI & TECH
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