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A method to achieve recessive sludge growth reduction and enhanced wastewater treatment using Fenton oxidation

A recessive growth and wastewater treatment technology, applied in water/sludge/sewage treatment, oxidation treatment sludge, biological water/sewage treatment, etc., can solve problems such as high energy consumption, high cost, and poor reduction effect , to achieve a strengthening effect and a good effect

Active Publication Date: 2021-06-04
DONGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • 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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  • A method to achieve recessive sludge growth reduction and enhanced wastewater treatment using Fenton oxidation

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Embodiment 1

[0022] A method for realizing hidden growth reduction of sludge and strengthening wastewater treatment by using Fenton oxidation, comprising the following steps:

[0023] (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 phos...

Embodiment 2

[0028] A method for realizing hidden growth reduction of sludge and strengthening wastewater treatment by using Fenton oxidation, comprising the following steps:

[0029] (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.

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Abstract

The invention discloses a method for realizing the hidden growth reduction of sludge and strengthening waste water treatment by utilizing Fenton oxidation. After the sewage undergoes biochemical reaction of activated sludge, the mud-water mixed liquid settles in a secondary sedimentation tank, and part of the sludge is returned to the In the biochemical reaction system, the remaining sludge part is directly discharged into the sludge Fenton reaction tank, and the other part is discharged into the sludge concentration tank. After concentration, conditioning and dehydration, it is transported out for disposal; acid is added to the sludge Fenton reaction tank to adjust When the pH value reaches acidity, the Fenton reaction is started to break the sludge; 2+ Convert to Fe 3+ ; Return the sludge breaking liquid in the adjustment tank to the biochemical reaction tank, and use it as a carbon source for sludge growth by activated sludge to realize the hidden growth reduction of sludge. The invention can realize the reduction of the sludge in the sewage treatment system, is simple to operate, and provides a feasible method for the reduction of the excess sludge and the enhancement of the 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 and strengthening wastewater treatment by utilizing Fenton oxidation. 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. D...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F11/06C02F3/34
CPCC02F3/34C02F11/06C02F2303/06C02F2305/026
Inventor 陈红薛罡李响孟程程钱雅洁刘振鸿张文启方庭玕刘云帆王晓暖陈畅愉
Owner DONGHUA UNIV