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Method for removing hydrogen sulfide from anaerobic digestive system

An anaerobic digestion system, hydrogen sulfide technology, applied in chemical instruments and methods, electrochemical sludge treatment, water/sludge/sewage treatment, etc., can solve problems such as unused, continuous current efficiency loss, etc., and achieve improved production The effect of methane amount, low cost and good application prospect

Inactive Publication Date: 2019-01-18
薛蔚琦 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This technology is only used for the control of hydrogen sulfide in sewage at this stage, but the removal of hydrogen sulfide in sludge treatment has not yet been applied
In addition, the electrochemical treatment technology still uses direct current, which usually results in the formation of an impermeable oxide film on the cathode, resulting in a loss of continuous current efficiency

Method used

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  • Method for removing hydrogen sulfide from anaerobic digestive system
  • Method for removing hydrogen sulfide from anaerobic digestive system
  • Method for removing hydrogen sulfide from anaerobic digestive system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The present embodiment provides a method for removing hydrogen sulfide in the anaerobic digestion system, comprising the steps of:

[0030] S1: Take 100mL of residual sludge from a municipal sewage treatment plant, and adjust its mixed liquid suspended solids concentration (MLSS) to 8000mg / L;

[0031] S2: Add the concentrated remaining sludge into the plexiglass electrolytic cell, and use the pulse mode of (2 seconds on / 8 seconds off) with voltages of 0, 1, 3, 5, 8, 10, 12, and 15V respectively. After electrolyzing sludge for 40 minutes, add the remaining sludge to the anaerobic digestion system;

[0032] S3: 125mL serum bottles were used for biochemical methanogenic potential test (BMP test) to evaluate hydrogen sulfide removal effect and methane production; serum bottles were filled with 40mL electrolyzed sludge, 20mL methanogenic sludge and 20mL 1x phosphoric acid salt buffer;

[0033] S4: Before the BMP test, use nitrogen to flush the headspace of the serum bottle...

Embodiment 2

[0039] The present embodiment provides a method for removing hydrogen sulfide in the anaerobic digestion system, comprising the steps of:

[0040] S1: Take 100mL of residual sludge from a municipal sewage treatment plant, and adjust its mixed liquid suspended solids concentration (MLSS) to 5000mg / L;

[0041] S2: Put the concentrated remaining sludge into the plexiglass electrolytic cell, use the pulse mode of (2 seconds on / 2 seconds off) at a voltage of 10V, electrolyze the sludge for 20 minutes, and then add the remaining sludge to the electrolytic cell in the oxygen digestive system;

[0042]S3: 125mL serum bottles were used for biochemical methanogenic potential test (BMP test) to evaluate hydrogen sulfide removal effect and methane production; serum bottles were filled with 40mL electrolyzed sludge, 20mL methanogenic sludge and 20mL 1x phosphoric acid salt buffer;

[0043] S4: Before the BMP test, use nitrogen to flush the headspace of the serum bottle and substrate for ...

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Abstract

The invention relates to a method for removing hydrogen sulfide from an anaerobic digestive system. The method comprises the following steps: adding concentrated sludge into an organic glass electrolytic tank for electrolysis; adding electrolyzed sludge into the anaerobic digestive system; using a serum bottle for performing a biochemical methane-generating potential test, thereby assessing the removing effect of hydrogen sulfide and the yield of methane. Before the biochemical methane-generating potential test, the method also comprises the steps of using nitrogen for flushing the top space of serum bottle and substrate for 15 minutes and running for 30 days at 37 DEG C till the system is stable. The method for removing hydrogen sulfide from the anaerobic digestive system provided by theinvention is capable of removing the hydrogen sulfide from the anaerobic digestive system while increasing the yield of methane; the method is simple and the cost is low; the method has a bright application prospect.

Description

technical field [0001] The invention relates to the technical field of sludge treatment and resource utilization, in particular to a method for removing hydrogen sulfide in an anaerobic digestion system. Background technique [0002] At present, the activated sludge method is the most widely used technology in the global sewage biological treatment, but in the process of treatment, a large amount of residual sludge will be produced. As the volume of sewage treatment increases day by day, the sludge output presents an increasing trend. Sludge treatment is a major problem for sewage treatment plants. Sludge is rich in organic matter, how to make full use of these biological resources has become a new trend in sludge treatment. Biogas can be recovered from sludge by using sludge anaerobic digestion technology, and the methane gas in the biogas can be converted into electrical energy for reuse after being collected and purified. However, in the process of sludge anaerobic dige...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/00C02F11/04C02F11/12
CPCC02F11/006C02F11/04C02F11/12
Inventor 薛蔚琦曾谦郝天伟陈光浩
Owner 薛蔚琦