Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for realizing sludge recessive growth reduction and enhancing wastewater treatment by using Fenton oxidation

A technology of recessive growth and wastewater treatment, applied in water/sludge/sewage treatment, oxidation treatment of sludge, special compound water treatment, etc., can solve the problems of high cost, high energy consumption, poor reduction effect, etc. Achieve good effect and strengthen the effect of biochemical treatment

Active Publication Date: 2018-08-24
DONGHUA UNIV +1
View PDF3 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for realizing sludge recessive growth reduction and enhancing wastewater treatment by using Fenton oxidation

Examples

Experimental program
Comparison scheme
Effect test

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.

[0...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
concentrationaaaaaaaaaa
concentrationaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for realizing sludge recessive growth reduction and enhancing wastewater treatment by using Fenton oxidation. Sewage is biochemically reacted by activated sludge, theobtained sludge and water mixture solution statically settles in a secondary sedimentation tank, a part of the sludge returns into a biochemical reaction system, the remaining sludge is directly discharged into a sludge Fenton reaction tank, and the other part is discharged into a sludge concentration tank, is concentrated, conditioned and dehydrated, and is sent out; an acid is added into the sludge Fenton reaction tank to adjust the pH value to be less than 7, and a Fenton reaction is started to disrupt the sludge; the obtained sludge disruption solution is transferred into an equalizing tank after the Fenton reaction, and Fe<2+> in the reaction process is converted into Fe<3+>; and the sludge disruption solution in the equalizing tank returns into a biochemical reaction tank, and is used as a sludge growth carbon source by the activated sludge in order to realize the recessive growth reduction of the sludge. The method can realize the reduction of the sludge in the sewage treatmentsystem, is simple to operate, and is a feasible method for reducing excess sludge and enhancing 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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(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