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A method for self-cultivation of salt-tolerant activated sludge using sebacic acid wastewater

A technology of activated sludge and sebacic acid, applied in water/sludge/sewage treatment, water pollutants, chemical instruments and methods, etc. Eliminate the problems of bacterial screening, isolation and cultivation, and achieve the effect of shortening the start-up time and simple operation

Active Publication Date: 2016-05-25
BLUESTAR LEHIGH ENG INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the screening, isolation and cultivation of halophilic bacteria is a heavy workload, and it is difficult to ensure that the selected halophilic bacteria can stably adapt to the treatment environment of sebacic acid wastewater
[0005] Therefore, also lack a kind of method that can make sebacic acid wastewater direct biochemical treatment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Embodiment 1, a kind of method utilizing sebacic acid waste water to carry out salt-tolerant activated sludge self-cultivation, its step comprises:

[0032] (1) Dilute the aged sebacic acid wastewater with an aqueous solution with a concentration of 5% sodium sulfate to COD<500mg / L, volatile phenol<50mg / L, and supplement nitrogen and phosphorus as needed for shaking or aeration culture, to the resistant Saline microorganisms are enriched;

[0033] The aged sebacic acid wastewater refers to sebacic acid wastewater stored at room temperature for at least 1 month;

[0034] (2) After the degradation rate of COD or volatile phenol > 80%, let it settle down, discharge 1 / 6 volume of the culture solution, then supplement the corresponding volume of sebacic acid waste water and an appropriate amount of nitrogen and phosphorus, and continue the cultivation; repeat this operation , until the culture of salt-tolerant activated sludge flocs;

[0035] (3) Maintain F / M=0.05, supplem...

Embodiment 2

[0036] Embodiment 2, a kind of method utilizing sebacic acid wastewater to carry out salt-tolerant activated sludge self-cultivation, its steps include:

[0037] (1) Dilute the aged sebacic acid wastewater with an aqueous solution with a sodium sulfate concentration of 15% to COD<500mg / L, volatile phenol<50mg / L, and supplement nitrogen and phosphorus as needed for shaking or aeration culture, to the resistant Saline microorganisms are enriched;

[0038] The aged sebacic acid wastewater refers to sebacic acid wastewater stored at room temperature for at least 1 month;

[0039] (2) After the degradation rate of COD or volatile phenol > 80%, let it settle down, discharge 1 / 2 volume of the culture solution, then supplement the corresponding volume of sebacic acid wastewater and appropriate amount of nitrogen and phosphorus, and continue the cultivation; repeat this operation , until the culture of salt-tolerant activated sludge flocs;

[0040] (3) Maintain F / M=0.80, supplement n...

Embodiment 3

[0041] Embodiment 3, a kind of method utilizing sebacic acid wastewater to carry out salt-tolerant activated sludge self-cultivation, its steps include:

[0042](1) Dilute the aged sebacic acid wastewater with an aqueous solution with a concentration of 10% sodium sulfate to COD<500mg / L, volatile phenol<50mg / L, and supplement nitrogen and phosphorus as needed for shaking or aeration culture, to the resistant Saline microorganisms are enriched;

[0043] The aged sebacic acid wastewater refers to sebacic acid wastewater stored at room temperature for at least 1 month;

[0044] (2) After the degradation rate of COD or volatile phenol > 80%, let it settle down, discharge 1 / 4 volume of the culture solution, then supplement the corresponding volume of sebacic acid wastewater and appropriate amount of nitrogen and phosphorus, and continue to cultivate; repeat this operation , until the culture of salt-tolerant activated sludge flocs;

[0045] (3) Maintain F / M=0.30, supplement nitro...

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Abstract

The invention relates to a method for self cultivation of salt-tolerant active sludge by using sebacic acid wastewater. The method comprises the following steps: 1, diluting a sodium sulfate solution by using aged sebacic acid wastewater to the COD of below 500mg / L and the phenol content of below 50mg / L, adding nitrogen and phosphorus nutrition, carrying out aeration or oscillation cultivation under a pH value of 3.0-9.55 at a temperature of 10-40DEG C, and controlling the dissolved oxygen (DO) of below 4.0mg / L; 2, adding the sebacic acid wastewater when the COD or the volatile phenol degradation rate is 80% or more, and continuously cultivating under same environment conditions until active sludge floc appears; and 3, maintaining the F / M value in a range of 0.05-0.8, and cultivating until the MLSS is greater than 1000mg / L. The active sludge cultivated through the method can be used to directly carry out biochemical treatment on the sebacic acid wastewater without diluting or desalinating the wastewater.

Description

technical field [0001] The invention relates to a method for using sebacic acid wastewater to self-cultivate salt-tolerant activated sludge, in particular to a method for using sebacic acid wastewater to self-cultivate salt-tolerant activated sludge capable of processing sebacic acid wastewater. Background technique [0002] Sebacic acid is an important valuable chemical raw material. At present, the production process of cracking castor oil is mainly used. Each ton of product needs to consume 150-250kg of phenol and produce 25-40 tons of waste water, of which the phenol content is 2000- 5000mg / L, pH 2~3, sodium sulfate content 5~15%, COD content 10000~20000mg / L. Due to its characteristics of high salt, high phenol, and high COD, sebacic acid wastewater has always been considered as highly difficult to treat industrial wastewater. At present, combined processes such as extraction, macroporous resin adsorption, evaporation and desalination, and dilution biochemistry are often...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/00C02F3/12
CPCC02F3/12C02F3/34C02F2101/34C02F2101/345C02F2103/36Y02W10/10
Inventor 徐军董自斌李坤王开春云干赵焰刘娟刘锦生
Owner BLUESTAR LEHIGH ENG INST CO LTD
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