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A method of using Fenton oxidation coupled with microbial iron reduction to realize the hidden growth reduction of sludge

A technology of recessive growth and Fenton oxidation, which can be used in the oxidation treatment of sludge, biological sludge treatment, chemical instruments and methods, etc., and can solve the problems of high cost, poor reduction effect and high energy consumption.

Active Publication Date: 2021-09-14
DONGHUA UNIV +1
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  • 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

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  • A method of using Fenton oxidation coupled with microbial iron reduction to realize the hidden growth reduction of sludge

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Fenton oxidative coupling utilizing microbial iron reduction of sludge reductions achieved cryptic growth, comprising the steps of:

[0026] (1) Dyeing of a WWTP anaerobic - anoxic - aerobic (the AAO) of the biochemical process of organic matter in sewage, nutrients nitrogen and phosphorus removal. Construction laboratory dyeing wastewater treatment plants with the same two process reactor, the same concentration of inoculated activated sludge sewage treatment plant, biochemical influent COD 450-550mg / L, ammonia concentration of 45-60mg / L, total nitrogen concentration of 55-70mg / L, total phosphorus of influent concentration 5-10mg / L, after biological treatment AAO, the stable operation of the reactor effluent COD is two 110-150mg / L, ammonia concentration of 5-8mg / L, total nitrogen concentration of 18-25mg / L, TP concentration of 1.2-2.0mg / L.

[0027] (2) figure 1 , In which a plurality of reactors, the wastewater by biochemical reactions, into the secondary s...

Embodiment 2

[0031] Fenton reaction utilizing iron reduction method of coupling a microorganism sludge reductions achieved cryptic growth, comprising the steps of:

[0032] (1) a sewage using an inverted A2O process of organic matter in sewage, nutrients nitrogen and phosphorus removal. Construction laboratory dyeing wastewater treatment plants with the same two process reactor, the same concentration of inoculated activated sludge sewage treatment plant, biochemical influent COD 350-420mg / L, ammonia concentration of 35-50mg / L, total nitrogen concentration of 45-55mg / L, TP influent concentration of 8-13mg / L, by inversion A2O biological treatment process, after the stable operation, two reactor effluent COD is 65-85mg / L , ammonia concentration of 5-8mg / L, total nitrogen concentration of 15-20mg / L, TP concentration of 1.0-1.5mg / L.

[0033] (2)figure 1 As shown, after a set of reactors, sewage is physically reacted, the secondary sludge is entered into the sludge separation, and t...

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Abstract

The invention discloses a method for realizing recessive growth and weight loss of sludge by using Fenton oxidation coupled with microbial iron reduction. After the sewage undergoes biochemical reaction of activated sludge, the mud-water mixture settles quietly in a secondary sedimentation tank, and part of the sludge flows back to Biochemical reaction system, the remaining sludge is discharged into the sludge concentration tank for concentration treatment; the sludge in the concentration tank is partially conditioned and dehydrated, transported for disposal, and part is discharged into the microbial iron reduction tank to realize sludge hydrolysis and Fe 3+ The reduction of the sludge; the sludge is discharged into the sludge Fenton reaction tank after passing through the microbial iron reduction tank, and the Fenton reaction is started to carry out the cell-breaking treatment of the sludge; the sludge cell-breaking solution is transferred to the regulating tank, and the sludge realizes further internal Source consumption reduction; return the sludge cell solution in the regulating tank to the biochemical reaction tank. The invention can realize the reduction of sludge in the sewage treatment system and enhance the biochemical treatment effect of wastewater, has simple operation and low cost, and provides a feasible method for efficient reduction of excess sludge and improvement of biochemical treatment effect of wastewater.

Description

Technical field [0001] The present invention belongs to the field of environmental technology, particularly relates to a method of using Fenton oxidative coupling by reduction of sludge Microbial Iron cryptic growth reductions. Background technique [0002] In recent years, the problem of excess sludge treatment and disposal has become a global environmental issues need to be resolved, due mainly to sewage treatment activated sludge treatment, sewage treatment process produces a large amount of excess sludge is rich in organic matter. According to statistics, dried sludge produced in my country in 2013 weighs about 6.25 million tons, and from 2007 to 2013 was 13 per cent annual growth rate (WaterResearch, 2015,78: 60-73), without proper treatment and disposal of sludge will serious harm to the environment and human health. Currently, sludge treatment and disposal methods based primarily focus on its reduction, sound, stabilization and resources in four areas. Since an organic-ric...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F11/04C02F11/145C02F11/122C02F11/06C02F3/30
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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