Study On Aniline Wastewater Treatment In Low Temperature Through A/O Process By Adding Selected Bacteria

Aniline has strong toxicity, and it can be absorbed through the skin or the respiratory tract. The Aniline can lead to serious effects such as hemolytic anemia, injury of liver and kidney and methemoglobinemia. Aniline is a kind of significant chemical raw material, which is used in pharmaceutical and rubber vulcanization accelerator. It can also be used for the production of resins and coatings. Aniline and its composites can be seen in different fields in industry and agriculture, and even in people’s everyday life, which is harmful to people’s health both in the direct and indirect way. Bioremediation can speed up the natural biodegradation rate by optimizing the environmental factors. In addition, it is a kind of proficient, inexpensive and environmental clean technology. In the north part of China, the winter time can last for nearly half a year, and the lowest temperature can reach-30℃.The natural metabolic mechanism of low-temperature microbes permits them to raise and metabolize at low temperatures. As a result, the function of low-temperature microbial is important to the treatment of environmental pollutants in cold areas. Much work has been done to promote the efficiency of aniline elimination with natural microorganisms and to utilize its result on aniline wastewater treatment in low temperature in the thesis.The strain YX-5which is selected from jihua sludge in low temperature can be grown in solitary carbon and nitrogen sour. The flora with the same quantity of YX-5and together with jihua sludge were cut to A/O procedure to examine their capability to take away aniline and see out classification of TOC, TN, interconnected index by microorganism from a full range biotreatment structure treating aniline. According to the aniline concentration burthen impact, pH burthen impact and phenol burthen impact, it is discovered that each system appeared respective advantage in different punching conditions. The strain YX-5behaved well under aniline removal in pH burthen impact, but the flora was increasing in aniline concentration burthen impact and phenol burthen impact. In the course of the experiments of bioagumentation, the result of TOC removal in the systems with aggrandizement was better than that in comparison system. On the other hand, there was not such advantage for the TN removal.