Bio-augmentation technique for treating high ammonia nitrogen waste water under low temperature condition

Abstract

The invention discloses a bio-augmentation technique for treating high ammonia nitrogen waste water under a low temperature condition. The technique comprises the following stages: a, activating an efficient strain, and carrying out anaerobic culture, rejuvenation and propagation; b, carrying out membrane forming and acclimatisation by virtue of a biological aerated filter; and c, treating waste water in the biological aerated filter. By adopting the technique disclosed by the invention, the ammonia nitrogen removal rate in low-carbon source high-ammonia nitrogen waste water in a laboratory can reach more than 90%, the ammonia nitrogen waste water removal rate in the low-carbon source high-ammonia nitrogen waste water in an industrial experiment can reach more than 83% when the temperature is more than 10 DEG C, can reach more than 70% when the temperature is more than 4-10 DEG C and still can reach more than 61% when the temperature is 1-4 DEG C; the ammonia nitrogen concentration inthe low-carbon source high ammonia nitrogen waste water is effectively reduced, no nitrite is accumulated or few nitrite is accumulated, thus being beneficial to carrying out other subsequent biochemical reactions; and the technique disclosed by the invention can stably operate under the low temperature condition, thus having wide propagable region and being beneficial to popularization of microbiological treatment waste water.

Description

technical field [0001] The invention relates to the field of industrial wastewater treatment, in particular to a treatment technology for low-carbon source high-ammonia-nitrogen wastewater under low-temperature conditions. Background technique [0002] With the development of modern synthetic industry, the discharge of ammonia nitrogen in various industrial wastewater (fertilizer production, food processing, printing and dyeing industry, landfill and landfill leachate, etc.) is very large, and its concentration is even as high as 1300-1600mg / L, which is A low-carbon source high-ammonia-nitrogen wastewater is an important factor leading to water environment pollution in my country. Due to the different characteristics of ammonia-nitrogen in different wastewater, there are different treatment methods, and the cost is high. How to deal with high-concentration ammonia-nitrogen from the perspective of economy, practicality and environmental protection Wastewater has become one of t...

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Problems solved by technology

[0004] The existing bioaugmentation method is to directly add biological strains into the wastewater. Under low temperature conditions, the ammonia nitrogen removal rate of low carbon source high ammonia nitrogen wastewater is very low. Even if the ammonia nitrogen concentration in the wastewater is as low as 30mg / L-40mg / L, The treatment is still not up to standard. Another common problem is that the bioaugmentation method has serious nitrite accumulation in the process of treating high ammonia nitrogen wastewater, and sometimes even inhibits the microorganisms in the bioaugmentation treatment system. Therefore, although the bioaugmentation method is relatively Economical solution but not widely available

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