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A quick start-up method for short-cut nitrification and denitrification in wastewater treatment system

A waste water treatment system, short-cut nitrification technology, applied in chemical instruments and methods, biological water/sewage treatment, water/sludge/sewage treatment, etc., can solve problems that limit the development and application of short-cut nitrification and denitrification technology, and achieve guaranteed The effects of long-term stable operation, reduced labor intensity, and shortened adaptation period

Active Publication Date: 2019-01-25
CHINA PETROLEUM & CHEM CORP +1
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  • Description
  • Claims
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Problems solved by technology

This greatly limits the development and application of short-cut nitrification and denitrification technology.
CN201210130659.X discloses a quick start-up method for short-range nitrification and denitrification of ammonia-containing wastewater, which is characterized by enriched nitrifying bacteria and denitrifying bacteria with nitrous nitrogen as the nitrogen source, although the method realizes Quick start of short-cut nitrification, but because of the use of nitrifying bacteria and denitrifying bacteria, the two types of bacteria need to be cultured in different culture solutions before adding

Method used

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  • A quick start-up method for short-cut nitrification and denitrification in wastewater treatment system
  • A quick start-up method for short-cut nitrification and denitrification in wastewater treatment system

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Embodiment 1

[0028] Example 1 Preparation of denitrification microbial preparation

[0029] 1. Cultivation of a single bacterial strain: According to the methods described in CN102465103, CN102465104, CN102465105 and CN102465106, the four bacterial strains FDN-1, FDN-2, DN-3 and SDN-3 were individually cultured to the logarithmic growth phase to obtain a single The seed liquid of the strain.

[0030] 2. Preparation of nitrogen-removing microbial preparations: the seed liquids of the above-mentioned four strains of Arthrobacter FDN-1, Flavobacterium waterii FDN-2, Paracoccus denitrificans DN-3 and Methylobacterium SDN-3 were mixed at a ratio of 1:2. : 8~15:8~15 and 8~15:8~15:2:1 are mixed in two volume ratios, respectively carried out amplified culture in a reactor with a good stirring system, and the concentration of ammonia nitrogen in the culture solution is 200~800mg / L, the mass ratio of carbon to nitrogen is 2:1~4:1, the temperature is 25°C~35°C, the pH value is 6.5~10.0, the dissolv...

Embodiment 2

[0033] Use self-prepared wastewater with ammonia nitrogen concentration of 300mg / L and COD concentration of 800mg / L as the test water for short-range nitrification and denitrification start-up test of the reactor. During the start-up process, the pH is controlled at 7.9, the temperature is controlled at 20°C, 1.5~3.0mg / L, the mass ratio of carbon to nitrogen is 4:1. Firstly, 20% of the treated wastewater volume was inoculated with activated sludge for adaptive acclimatization. First run intermittently, stop ventilation after 24 hours of reaction, discharge the supernatant after natural settlement, leave activated sludge, and then fill the reactor with new ammonia-containing wastewater. When the removal rate of ammonia nitrogen is greater than 90%, increase the concentration of ammonia nitrogen in the influent, and the range of each increase is 100mg / L. After 3 days of operation, when the concentration of suspended solids in the supernatant is 80mg / L, add according to the volum...

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Abstract

The invention discloses a quick starting method of waste water treatment system short-cut nitrification denitrification. The quick starting method comprises following steps: (1) firstly, a bioreactor is inoculated with aerobic activated sludge from wastewater treatment plants; (2) batch water injection is adopted, and then continuous water injection is adopted for system starting; and (3) denitriding microbial preparations are added at different ratio for different water injection modes, wherein the denitriding microbial preparations are mainly composed of Arthrobacter creatinolyticus FDN-1, Flavobacterium mizutaii FDN-2, Paracoccus denitrificans DN-3, and Methylobacterium phyllosphaerae SDN-3, volume ratio of the microbial preparations added in batch water injection is 1:2:(8-15):(8-15), and volume ratio of the microbial preparations added in continuous water injection is (8-15):(8-15):2:1. The quick starting method is capable of reducing starting difficulty of short-cut nitrification greatly and shortening start time obviously, ensuring long-term stable operation of reactors, achieving high waste water treatment efficiency, and realizing simultaneous removing of ammonia nitrogen, total nitrogen, and COD.

Description

technical field [0001] The invention belongs to the technical field of waste water treatment, and in particular relates to a quick start-up method for short-range nitrification and denitrification in a waste water treatment system. The method can realize the quick start-up of the waste water treatment system and at the same time make the waste water meet the standard treatment. 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, measured by Cr method) and high ammonia nitrogen wastewater. In particular, nitrosation biological denitrification technology has attracted widespread attention due to its advantages of reducing energy co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/30C02F3/34
Inventor 高会杰郭志华孙丹凤郭宏山
Owner CHINA PETROLEUM & CHEM CORP
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