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Method for producing volatile organic acid by anaerobic fermentation of sludge

A volatile organic acid and sludge anaerobic fermentation technology, which is applied in sludge treatment, biological sludge treatment, electrochemical sludge treatment, etc., can solve the hidden dangers of chemical storage and disposal, frequent chemical transportation, sewage Solve problems such as secondary pollution of sludge, achieve good sludge reduction effect, improve sludge biodegradability, and promote the effect of resource utilization

Inactive Publication Date: 2020-07-31
陈光浩
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, the volatile organic acids produced contain various organic acids such as acetic acid, propionic acid and lactic acid, and the market value is low.
In addition, the addition of a large amount of drugs leads to secondary pollution of sludge, frequent transportation of chemicals, and potential safety hazards in chemical storage and disposal

Method used

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  • Method for producing volatile organic acid by anaerobic fermentation of sludge
  • Method for producing volatile organic acid by anaerobic fermentation of sludge
  • Method for producing volatile organic acid by anaerobic fermentation of sludge

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0048] Embodiment 1: Take the activated residual sludge (waste activated sludge) of a municipal treatment plant as an example. The treatment steps include:

[0049] (1) Collect activated excess sludge from the secondary sludge settling tank of a municipal treatment plant, and the suspended solids concentration (MLSS) of the excess sludge after sedimentation is 10g / L;

[0050] (2) add surplus sludge in the plexiglass electrolytic cell, under the condition of normal temperature and normal pressure, turn on the voltage of 10V, use ruthenium series titanium electrode to process sludge 30min; The size of this ruthenium series titanium electrode is long 10cm, wide 5cm , Thick 2mm.

[0051] Collect 40 mL of excess sludge that has undergone the above electrochemical pretreatment and 40 mL of excess sludge that has not undergone pretreatment, and transfer to 125 mL serum bottles for anaerobic digestion / fermentation, respectively. During the experiment, serum vials were stored at a con...

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Abstract

The invention discloses a method for producing volatile organic acid by anaerobic fermentation of sludge, which comprises the following steps: (1) providing excess sludge generated by wastewater treatment, and carrying out electrochemical pretreatment on the excess sludge; and (2) carrying out anaerobic fermentation on the sludge subjected to electrochemical pretreatment for at least 5 days. According to the method, various materials (including sludge) can be pretreated under the condition of low energy consumption, the biodegradability of the sludge is improved, the anaerobic fermentation acid production reaction is promoted, the reduction and recycling of the sludge of a waste sewage treatment plant are realized, and the upgrading and reconstruction of a sewage treatment process are promoted; the method provided by the invention has the characteristics of easy operation and easy operation, can realize large-scale production, also has the advantage of reducing or even avoiding the addition of additional chemical agents, and provides a simple and efficient method for anaerobic fermentation acid production.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to a method for producing volatile organic acids by anaerobic fermentation of sludge. Background technique [0002] With the rapid increase in population and the development of urban industrialization, the volume of sewage treatment is increasing day by day. Sewage is usually treated by activated sludge biological treatment, and sewage biological treatment will inevitably produce a large amount of sludge. Sludge is a kind of pollutant that contains a lot of organic matter and is difficult to treat. At this stage, anaerobic digestion / fermentation is a major sludge treatment method. [0003] Anaerobic digestion of sludge for biogas production (i.e. methane and carbon dioxide) is a technology widely used in municipal wastewater treatment plants. However, in recent years, researchers and engineers have raised doubts about the effectiveness of anaerobic sl...

Claims

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Application Information

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IPC IPC(8): C02F11/04C02F11/00
CPCC02F11/006C02F11/04C02F2303/06
Inventor 陈光浩曾谦薛蔚琦郝天伟
Owner 陈光浩
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