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Method for realizing reduction of recessive growth of sludge through reduction of microbial iron which is subjected to coupled oxidation by using Fenton

A technology of recessive growth and Fenton oxidation, applied in biological sludge treatment, oxidation treatment sludge, chemical instruments and methods, etc., can solve the problems of high energy consumption, high cost, poor weight reduction effect, etc., and achieve improvement Flocculation and sedimentation, enhanced phosphorus removal, and improved sludge reduction effect

Active Publication Date: 2018-07-31
DONGHUA UNIV +1
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

As the key to the recessive growth of sludge - sludge cell destruction, currently, the researched cell destruction technologies include ultrasonic method, mechanical shearing method, high pressure method, heating method, ozone oxidation, adding alkali to crack, adding enzyme preparations, etc. , but due to problems such as high cost, high energy consumption, and poor reduction effect, there are few applications at present

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  • Method for realizing reduction of recessive growth of sludge through reduction of microbial iron which is subjected to coupled oxidation by using Fenton

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Embodiment 1

[0025] A method for utilizing Fenton oxidation coupled with microbial iron reduction to realize the hidden growth reduction of sludge, comprising the following steps:

[0026] (1) A printing and dyeing wastewater treatment plant adopts anaerobic-anoxic-aerobic (AAO) biochemical treatment process to remove organic matter and nutrients nitrogen and phosphorus in sewage. Two sets of process reactors identical to those of the printing and dyeing wastewater treatment plant were constructed in the laboratory, and the activated sludge of the wastewater treatment plant was inoculated with the same concentration. L, the total nitrogen concentration is 55-70mg / L, the total phosphorus concentration in the influent is 5-10mg / L, after the AAO biochemical treatment, after the operation is stable, the effluent COD concentration of the two reactors is 110-150mg / L, The concentration of ammonia nitrogen is 5-8mg / L, the concentration of total nitrogen is 18-25mg / L, and the concentration of total...

Embodiment 2

[0031] A method for realizing hidden growth reduction of sludge by using Fenton reaction coupled with microbial iron reduction, comprising the following steps:

[0032] (1) A certain domestic sewage adopts the inverted A2O process to remove organic matter and nutrients nitrogen and phosphorus in the sewage. Two sets of process reactors identical to those of the printing and dyeing wastewater treatment plant were constructed in the laboratory, and the activated sludge of the wastewater treatment plant was inoculated with the same concentration. L, the total nitrogen concentration is 45-55mg / L, the total phosphorus concentration in the influent is 8-13mg / L, after biochemical treatment by the inverted A2O process, after the operation is stable, the effluent COD concentration of the two sets of reactors is 65-85mg / L , the concentration of ammonia nitrogen is 5-8mg / L, the concentration of total nitrogen is 15-20mg / L, and the concentration of total phosphorus is 1.0-1.5mg / L.

[003...

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Abstract

The invention discloses a method for realizing reduction of recessive growth of sludge through reduction of microbial iron which is subjected to coupled oxidation by using Fenton. The method comprisesthe steps of: preforming a biochemical reaction of activated sludge on sewage, conducting static setting on the obtained sludge-water mixed liquid in a secondary settling tank, and performing refluxof part of the sludge to a biochemical reaction system, discharging the remaining sludge into a sludge concentration tank for concentration treatment, performing conditioning dehydration on part of sludge in the concentration tank, performing external transporting treatment, and discharging a part of the dehydrated sludge into a microbial iron reduction tank so as to realize hydrolysis of the sludge and reduction of Fe<3+>; performing treatment on the sludge in the microbial iron reduction tank, discharging the reduced sludge into a sludge Fenton reaction tank, and starting a Fenton reaction so as to perform breakage treatment on the sludge; and transferring the sludge cell-broken liquid to a regulating tank so as to realize further reduction of endogenous consumption of the sludge, and returning the sludge cell-broken liquid in the regulating tank to the biochemical reaction tank. Through the method, reduction of the sludge inside the sewage treatment system and reinforcement of a biochemical treatment effect of wastewater are realized, the method has simple operation and low cost, and a feasible method is provided for efficient reduction of the remaining sludge and improvement ofthe biochemical treatment effect of the wastewater.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to a method for realizing recessive growth reduction of sludge by using Fenton oxidation coupled with microbial iron reduction. Background technique [0002] In recent years, the treatment and disposal of excess sludge has become an urgent global environmental problem. Since the sewage treatment is mainly treated by the activated sludge method, a large amount of excess sludge rich in organic matter is produced in the process of sewage treatment. According to statistics, in 2013, the dry sludge produced in my country weighed about 6,250,000 tons, and showed an annual growth rate of 13% from 2007 to 2013 (WaterResearch, 2015, 78: 60-73). Serious harm to the environment and human health. At present, the method based on sludge treatment and disposal mainly focuses on four aspects of its reduction, harmlessness, stabilization and resource utilization. Due to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/04C02F11/14C02F11/12C02F11/06C02F3/30
CPCC02F3/30C02F11/04C02F11/06C02F11/122C02F11/14C02F2303/06
Inventor 薛罡陈红钱雅洁李响张文启刘振鸿孟程程李珂徐先宝王静张禾
Owner DONGHUA UNIV
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