Sewage treatment process for realizing sludge reduction by taking elemental sulfur as medium

A sewage treatment and sludge reduction technology, applied in water/sludge/sewage treatment, water/sewage multi-stage treatment, oxidized water/sewage treatment, etc., can solve the problem of large excess sludge production and achieve cost savings , simple equipment, low energy consumption

Active Publication Date: 2013-07-03
SOUTH CHINA NORMAL UNIVERSITY
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

Overcome the problem of large surplus sludge output in the prior art

Method used

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  • Sewage treatment process for realizing sludge reduction by taking elemental sulfur as medium
  • Sewage treatment process for realizing sludge reduction by taking elemental sulfur as medium
  • Sewage treatment process for realizing sludge reduction by taking elemental sulfur as medium

Examples

Experimental program
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Embodiment

[0048] A sewage treatment process using elemental sulfur as a medium to achieve sludge reduction, including the following steps, the process design principle is shown in figure 1 :

[0049] (1) Process installation diagram

[0050] The sulfur reduction reactor in this process adopts an upflow sulfur packed bed biofilm reactor, its dissolved oxygen concentration is less than 0.2mg / L, the total volume of the reactor is 3.6L, the volume of the packing sulfur block is 1.32L, and the effective volume is 2.28L , made of plexiglass.

[0051] The sulfur oxidation reactor adopts an upflow aerobic reactor with a total volume of 2L and a total height of 80cm. There is an aeration device at the bottom and it is made of plexiglass.

[0052] (2) Hanging film of sulfur reduction reactor

[0053] After fixing the sulfur particle packing in the sulfur reduction reactor, inoculate the activated sludge (from the urban sewage treatment plant) from the top of the reactor, and then feed the dome...

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Abstract

The invention discloses a sewage treatment process for realizing sludge reduction by taking elemental sulfur as the medium. The sewage treatment process comprises the following steps: allowing the sewage to be treated to flow into a sulfur reduction reactor for anaerobic biological treatment, removing the organic matters in the sewage during the sulfur reduction process to produce a minus bivalence sulfide, introducing the minus bivalence sulfide into a sulfur oxidation reactor inoculated with sulfur oxidizing bacteria for reoxidizing the minus bivalence sulfide into elemental sulfur, and then allowing the elemental sulfur to reversely flow to the sulfur reduction reactor. The sulfur reducing bacteria are first applied to the field of water treatment to form various sewage treatment processes with less sludge production, thereby realizing the innovation of the sewage treatment method; in the traditional anaerobic sulfate sewage treatment process, the sulfate is used as the electron acceptor during the COD (chemical oxygen demand) mineralization, however, the process utilizes the elemental sulfur for replacing the sulfate and sulfite; and in the whole process, the equipment is simple, the energy consumption is low, and the cost is saved.

Description

technical field [0001] The invention belongs to the field of sewage treatment and relates to a sewage treatment process which uses elemental sulfur as a medium to realize sludge reduction. Background technique [0002] The problem of sludge treatment and disposal in urban sewage treatment plants has plagued my country's sewage treatment industry for many years. With the continuous improvement of my country's sewage treatment rate, the output of excess sludge has been increasing year by year, and the contradiction between high treatment and disposal costs and insufficient site and treatment capacity has become increasingly acute. To solve this problem, the best way is to achieve sludge reduction in the sewage treatment process. [0003] However, the sludge yield of the existing sewage biological treatment process is relatively high (the sludge yield of the commonly used traditional activated sludge method is as high as 0.42kgVSS / kgCOD). To solve the sludge problem, it is ne...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F1/72C02F1/70
Inventor 江峰肖敏张良张怡萍张泽峰
Owner SOUTH CHINA NORMAL UNIVERSITY
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