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Treatment method for difficultly-degraded organic wastewater

A technology for organic wastewater and treatment methods, which is applied in special compound water treatment, biological water/sewage treatment, water/sludge/sewage treatment, etc., and can solve the problems of low biotransformation rate, limited tolerance, and long treatment process. , to achieve the effect of high processing efficiency, reduced reflux ratio and low operating cost

Active Publication Date: 2017-11-03
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The anaerobic hydrolytic acidification process has certain advantages in the treatment of refractory organic wastewater, but there are still problems such as low bioconversion rate, limited tolerance of anaerobic hydrolytic acidification microorganisms to the concentration of pollutants, and accumulation of organic acids in the hydrolytic acidification system.
With the traditional activated sludge treatment process being long, occupying a large area, and the contradictions of complex operation have become increasingly prominent, people are trying to improve the efficiency of refractory organic wastewater by improving metabolic strains and improving and optimizing reaction processes.
[0005] CN201010218533.9 discloses a compound high-efficiency microbial preparation for refractory wastewater treatment and its preparation and application. The invention solves the difficult problem of refractory organic wastewater treatment by adding bacterial agents, but the residence time of wastewater treatment is still as high as 60 hours above
CN200710090244.3 discloses a deep denitrification treatment method for high-concentration organic wastewater, which includes anaerobic decarbonization zone, aerobic nitrosation zone plus anammox denitrification zone and traditional nitrification and denitrification It needs to be composed of six independent reaction pools, the treatment process is long, and does not involve the treatment effect of wastewater containing refractory organic matter

Method used

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  • Treatment method for difficultly-degraded organic wastewater
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Examples

Experimental program
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Effect test

Embodiment 1

[0032] A certain wastewater contains a small amount of hydrocarbon refractory substances, the average COD concentration is 6500mg / L, the average BOD concentration is 150mg / L, the average total nitrogen concentration is 500mg / L, and the pH is 7.5. The anoxic unit-aerobic unit-denitrification unit combination process of the present invention is used for treatment, wherein the aerobic unit is inoculated with YX flora according to the concentration of nitrosifying dominant flora in the sewage treatment system as 600mg / L, and simultaneously according to the sewage treatment system Add microbial growth promoter D1 at a medium accelerator concentration of 20mg / L to control the nitrification rate between 75% and 80%. The denitrification unit is inoculated with denitrification granular sludge FX-1 according to the sludge concentration of 500mg / L. Add microbial growth promoter E1 according to the accelerator concentration of 20mg / L in the sewage treatment system. The ratio of effluent f...

Embodiment 2

[0034] A certain wastewater contains a small amount of hydrocarbon refractory substances, the average COD concentration is 6500mg / L, the average BOD concentration is 150mg / L, the average total nitrogen concentration is 500mg / L, and the pH is 7.5. The anoxic unit-aerobic unit-denitrification unit combination process of the present invention is used for treatment, wherein the YX flora is inoculated in the aerobic unit according to the concentration of nitrosifying dominant bacteria in the sewage treatment system at 500 mg / L, and simultaneously according to the concentration of nitrosative bacteria in the sewage treatment system The accelerator concentration is 20mg / L and microbial growth accelerator D1 is added to control the nitrification rate between 75% and 80%. The denitrification unit first inoculates the activated sludge according to the sludge concentration of 1200mg / L, and then injects it according to 500mg / L Add denitrification granular sludge FX-2, and at the same time ...

Embodiment 3

[0036] A wastewater contains a small amount of nitrogen-containing heterocyclic compounds, with an average COD concentration of 4500mg / L, an average BOD concentration of 120mg / L, an average total nitrogen concentration of 200mg / L, and a pH of 7.8. The anoxic unit-aerobic unit-denitrification unit combination process of the present invention is used for treatment, wherein the sludge concentration of the aerobic unit is controlled at 1500mg / L, and then YX is added according to the concentration of nitrosifying dominant bacteria in the sewage treatment system as 400mg / L At the same time, add microbial growth promoter D2 according to the accelerator concentration of 15mg / L in the sewage treatment system, control the nitrification rate between 70% and 75%, and control the sludge concentration at 1000mg / L in the denitrification unit, and then Add denitrification and denitrification granular sludge FX-1 at 400mg / L, and at the same time add microbial growth accelerator E2 at the accele...

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Abstract

The invention discloses a treatment method for difficultly-degraded organic wastewater. According to the treatment method, an anoxic unit, an aerobic unit and a denitrification unit are arranged, a nitrosation dominant flora and a microorganism growth promoter D are poured into the aerobic unit and the nitrosation rate in the effluent is controlled at 65-80%, one part of the effluent of the aerobic unit refluxes to the anoxic unit and the reflux ratio is controlled at 15-25%, the other part of the effluent of the aerobic unit enters the denitrification unit, denitrification particle sludge and a microorganism growth promoter E are poured into the denitrification unit, treatment is performed with the denitrification unit so as to discharge, the promoter D comprises a metal salt, a polyamine substance, organic acid hydroxylamine and Na2SO3, the promoter E comprises a metal salt, a polyamine substance, organic acid hydroxylamine and an organic acid salt, and the metal salt comprises a calcium salt, a copper salt, a magnesium salt and / or a ferrous salt. According to the present invention, the nitrosation dominant flora and the microorganism growth promoter D are poured into the aerobic unit to control the nitrosation rate, and the denitrification particle sludge and the microorganism growth promoter E are poured into the denitrification unit so as to achieve the deep treatment of the COD and the total nitrogen.

Description

technical field [0001] The invention belongs to the technical field of waste water treatment, and in particular relates to a treatment method for refractory organic waste water. Background technique [0002] With the rapid development of petrochemical, plastic, synthetic fiber, printing and dyeing, coal chemical and other industries, especially the continuous use of new technologies and new materials, the types of refractory organic pollutants in the wastewater produced by these enterprises are gradually increasing. Wastewater treatment Difficulty increases. Although physical and chemical methods such as advanced oxidation can treat refractory organic wastewater, they are often used in the pretreatment of biological treatment to improve biodegradability due to the disadvantages of high cost, incomplete mineralization, and easy generation of secondary pollution. Biological treatment has attracted increasing attention in the treatment of refractory organic wastewater due to i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/30C02F3/34C02F101/30
CPCC02F3/302C02F3/34C02F2101/30C02F2305/06
Inventor 高会杰孙丹凤郭志华赵胜楠
Owner CHINA PETROLEUM & CHEM CORP
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