Study On Removing Technology Of Heavy Metals In Animal Manure

Leaching efficiency, influencing factors and leaching characteristics of bioleaching and chemistry leaching of heavy metals from animal excrement are studied in this paper. Firstly, different training programs in microbial sulfur bacteria culture are comparatively analysed to determine suitable training program of sulfur bacteria. Then, bioleaching mechanism is discussed according to bioleaching characteristics and speciation analysis of heavy metals. Based on SEM of microbial forms, determination of the number of bacteria and observation of bacterial Morphology after the bacteria culture, the change of Microorganisms types and quantities before and after bioleaching are summed up. Based on the study of factors affecting bioleaching and chemistry leaching respectively and comparative analysis of the two methods, characteristics of each method and the same point of them in the treatment of animal excrement are revealed, advantages and shortcomings of each method are summarized, and eventually the optimum parameters suitable for bioleaching and chemistry leaching are established. Finally problems easily produced in practical applications of bioleaching and chemistry leaching are summarized through the experiment of the small scale reactor, and the solutions recommended are put forward.