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A quick start-up method for treating ammonia-containing wastewater by a/o process

A waste water and process technology, applied in the field of rapid start-up of A/O process treatment of ammonia-containing waste water, can solve the problems of large dosage of inoculants and increase system start-up costs, achieve growth and value-added, ensure long-term stable operation, The effect of reducing start-up costs

Active Publication Date: 2020-04-14
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

CN201210130655.1 discloses a quick start-up method for treating ammonia-containing wastewater by A / O process. Although the invention realizes quick start-up, the dosage of bacteria agent is relatively large, which additionally increases the start-up cost of the system

Method used

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  • A quick start-up method for treating ammonia-containing wastewater by a/o process
  • A quick start-up method for treating ammonia-containing wastewater by a/o process

Examples

Experimental program
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Effect test

Embodiment 1

[0033] First, aerobic activated sludge was added to the O reactor according to 10% of the effective volume of the reactor, and at the same time, the growth promoter I was added to the O reactor according to the accelerator concentration in the culture system of 25mg / L, and the pH was controlled at 7.9, The temperature is controlled at 20°C, and the dissolved oxygen concentration is about 1.5-3.0mg / L. The next day, anaerobic activated sludge was added to reactor A according to 10% of the effective volume of the reactor, and denitrification bacteria agent a was added to reactor A according to 0.1% of the volume ratio, the pH value was controlled at 8.0, and the dissolved oxygen concentration was 0.5~1.0mg / L. The ammonia-containing wastewater with a concentration of 250mg / L is used as the feed water of the O reactor, and the supernatant of the O reactor is used as the feed water of the A reactor. Water is fed intermittently first, and each batch is reacted for 24 hours. After th...

Embodiment 2

[0035] First, aerobic activated sludge was inoculated into the O reactor according to 20% of the effective volume of the reactor. At the same time, the growth promoter II was added according to the concentration of the promoter in the culture system of 25 mg / L, the pH was controlled at 8.0, the temperature was controlled at 30°C, and the dissolved oxygen concentration was about 2.5-4.0 mg / L. The next day, add anaerobic activated sludge to reactor A according to 40% of the effective volume of the reactor, and then add denitrification bacteria agent b to reactor A according to the volume ratio of 0.05%. The pH value is controlled at 8.0, and the dissolved oxygen concentration 0.1~1.0mg / L. The ammonia-containing wastewater with a concentration of 200mg / L is used as the feed water of the O reactor, and the supernatant of the O reactor is used as the feed water of the A reactor. Water is fed intermittently first, and each batch is reacted for 24 hours. After the O reactor stops ae...

Embodiment 3

[0037] First, aerobic activated sludge was inoculated into the O reactor according to 30% of the effective volume of the reactor. At the same time, the growth promoter III was added according to the concentration of the promoter in the culture system of 20 mg / L, the pH was controlled at 8.0, the temperature was controlled at 30°C, and the dissolved oxygen concentration was about 2.5-4.0 mg / L. The next day, add anaerobic activated sludge to reactor A according to 25% of the effective volume of the reactor, and then add denitrification agent c to reactor A according to the volume ratio of 0.05%, control the pH value at 8.0, and the concentration of dissolved oxygen 0.1~1.0mg / L. The ammonia-containing wastewater with a concentration of 200mg / L is used as the feed water of the O reactor, and the supernatant of the O reactor is used as the feed water of the A reactor. Water is fed intermittently first, and each batch is reacted for 24 hours. After the O reactor stops aeration, the...

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Abstract

The invention discloses a quick starting method for treating ammonia-containing wastewater through an A / O process. The method comprises: (1) putting inoculums in a bioreactor; and (2) adopting batch water-intaking operation and continuous water-intaking operation to start an A / O system. The bioreactor of an A / O process comprises an anoxic reactor that is an A reactor and an aerobic reactor that is an O reactor. The inoculums of the A reactor are nitrous-acid-type denitrification bacteria and anoxic activated sludge. The inoculums of the B reactor are aerobic activated sludge, and a microbial growth promotion agent is added to the O reactor at the same time. The promotion agent comprises metal salt and a polyamines substance, wherein the metal salt takes 40-100 parts by weight and comprises calcium salt, copper salt, magnesium salt and / or ferrous salt, and the polyamines substance takes 5-30 parts by weight. The difficulty of starting the A / O process is reduced, the starting time is obviously shortened, and starting cost of a sewage treatment system is decreased. The ammonia nitrogen and total nitrogen can be efficiently removed, and long-term stable operation of reactors is ensured.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to a quick-start method for treating ammonia-containing wastewater by an A / O process. The method can realize quick-start of short-range nitrification of ammonia-containing wastewater, especially high-concentration ammonia-containing wastewater. Background technique [0002] As an important research direction of water pollution control, biological denitrification of wastewater has undergone a process from mature traditional biological denitrification to new biological denitrification. The new biological denitrification process provides a feasible way for the treatment of low COD, (chemical oxygen demand, an indicator of carbon source content, COD value is measured by Cr in this application) high ammonia nitrogen wastewater. In particular, nitrosation biological denitrification technology has attracted widespread attention due to its advantages of reducing ene...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/30C02F101/16
Inventor 高会杰郭志华孙丹凤赵胜楠
Owner CHINA PETROLEUM & CHEM CORP
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