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Quick starting method for aerobic granular sludge reactor for treating difficultly degraded waste water

An aerobic granular sludge and rapid start-up technology, applied in chemical instruments and methods, sustainable biological treatment, biological water/sewage treatment, etc., can solve the problems of slow start-up and low treatment efficiency of aerobic granular sludge reactors

Active Publication Date: 2011-08-17
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a quick start-up method for aerobic granular sludge reactors for treating refractory wastewater, aiming at the outstanding problems of low treatment efficiency of toxic and refractory organic pollutants and slow start-up of aerobic granular sludge reactors

Method used

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  • Quick starting method for aerobic granular sludge reactor for treating difficultly degraded waste water
  • Quick starting method for aerobic granular sludge reactor for treating difficultly degraded waste water
  • Quick starting method for aerobic granular sludge reactor for treating difficultly degraded waste water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 1) The aeration sand head is evenly arranged at the bottom of the 5L sequencing batch bioreactor, and the external glass rotor gas flowmeter is used to control the surface gas velocity, and the external time control switch controls the automatic operation of the reactor;

[0022] 2) Use an organic load of 1.0kg m -3 d -1 In the simulated organic wastewater, sucrose was used as the single carbon source, and the activated sludge from Hangzhou Qige Wastewater Treatment Plant was activated and pretreated for 24 hours, and the activated and pretreated sludge was inoculated into the sequencing batch bioreactor , the biomass in the sequencing batch bioreactor is controlled at 3g·L -1 ;

[0023] 3) Start the sequencing batch bioreactor and control the surface gas velocity to 1.2cm s -1 , the influent uses sucrose as the carbon source, and the organic load is 1kg m -3 d -1 , the sludge settling time is 5min;

[0024] 4) The sequencing batch bioreactor runs for 7 days, and ...

Embodiment 2

[0030] 1) The aeration sand head is evenly arranged at the bottom of the 5L sequencing batch bioreactor, and the external glass rotor gas flowmeter is used to control the surface gas velocity, and the external time control switch controls the automatic operation of the reactor;

[0031] 2) Use an organic load of 1.0kg m -3 d -1 In the simulated organic wastewater, sucrose was used as the single carbon source, and the activated sludge from Hangzhou Qige Wastewater Treatment Plant was activated and pretreated for 24 hours, and the activated and pretreated sludge was inoculated into the sequencing batch bioreactor , the biomass in the sequencing batch bioreactor was controlled at 5g·L -1 ;

[0032] 3) Start the sequencing batch bioreactor and control the surface gas velocity to 1.5cm s -1 , the influent uses sucrose as the carbon source, and the organic load is 1.6kg m -3 d -1 , the sludge settling time is 15min;

[0033] 4) The sequencing batch bioreactor runs for 10 days,...

Embodiment 3

[0039] 1) The aeration sand head is evenly arranged at the bottom of the 5L sequencing batch bioreactor, and the external glass rotor gas flowmeter is used to control the surface gas velocity, and the external time control switch controls the automatic operation of the reactor;

[0040] 2) Use an organic load of 1.0kg m -3 d -1In the simulated organic wastewater, sucrose was used as the single carbon source in the simulated organic wastewater, and the activated sludge from Hangzhou Qige Wastewater Treatment Plant was activated and pretreated for 24 hours, and the activated and pretreated sludge was inoculated into the sequencing batch bioreactor , the biomass in the sequencing batch bioreactor was controlled at 4g·L -1 ;

[0041] 3) Start the sequencing batch bioreactor and control the surface gas velocity to 1.3cm s -1 , the influent uses sucrose as the carbon source, and the organic load is 1.4kg m -3 d -1 , the sludge settling time is 10min;

[0042] 4) The sequencing...

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Abstract

The invention discloses a quick starting method for an aerobic granular sludge reactor for treating difficultly degraded waste water. Sucrose is used as a carbon source in the inlet water of the starting initial stage, the organic load is controlled at 1 to 1.6kg m<-3>d<-1>, the surface air velocity is 1.2 to 1.5cm s<-1>, the settling time of sludge is controlled at 5 to 15 minutes, and the biomass in the reactor reaches 6 to 8g L<-1> after operating for 7 to 10 days; the organic load of the inlet water is further improved to 3.0 to 3.5kg m<-3>d<-1>, the surface air velocity is increased to 2.4 to 2.8cm s<-1>, the settling time of the sludge is shortened to 3 to 5 minutes, and the operation is continuously carried out for 3 to 5 days; and 25 percent of carbon source is replaced by using a toxic organic substance, the organic load is maintained at 3.0 to 3.5kg m<-3>d<-1>, the ratio of the toxic organic substance to the carbon source of the inlet water is improved according to the gradient of 25 percent every 7 days after the removal rate of pollutants reaches over 95 percent, and the operation is continuously carried out for 20 to 25 days, so that quick start of the aerobic granular sludge reactor for treating the toxic difficultly degraded organic waste water is realized. After the operation is continuously carried out for one month, the reactor is stable. The method quickly realizes start of the aerobic granular sludge reactor for treating the difficultly degraded waste water, and simultaneously realizes efficient and stable removal of the difficultly degraded pollutants.

Description

technical field [0001] The invention relates to sewage treatment in the environmental protection industry, in particular to a quick start-up method for an aerobic granular sludge reactor for treating refractory wastewater. Background technique [0002] In recent years, with the rapid development of my country's industrialization and economy, a large number of toxic and refractory organic pollutants have been discharged into the environmental water body, which has aggravated the pollution and complexity of the water environment. Studies have shown that synthetic organic compounds such as halogenated aromatic hydrocarbons and nitroaromatic hydrocarbons can exist in the environment for a long time, and have "three causes" effects, which seriously endanger environmental safety and human health. [0003] Aerobic granular sludge technology is one of the research hotspots in the field of wastewater biological treatment at home and abroad. Because of its compact structure, excellent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/12
CPCY02W10/10
Inventor 朱亮俞言文戚韩英徐向阳
Owner ZHEJIANG UNIV
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