| With the development of aquaculture generate a large number of feces of livestock and poultry production,It has already caused serious damage and pollution on China’s ecological environment,and seriously affected and restricted the sustainable development of livestock and poultry breeding.Aerobic composting is an effective means of livestock and poultry manure.The main malodorous gases generated in the composting process of hydrogen sulfide(H2S)phenomenon,this paper studies the characteristics of the related factors of volatile odor in pig manure composting process gas H2S and influence the volatile,and the compost filler as the research direction of biological deodorization.Using compost as biological filler tower packing removal of H2S gas,not only the rational use of the precious resources of pig manure,but also remove the H2S malodorous gas,in order to get good deodorization effect,this study from the disinfection and sterilization,different water content and different filling height of packed tower and continuous running time aspects.Parameter optimization of compost filler.The results are as follows:1.Study of the batch forced aeration static sealing high-temperature composting of pig manure,analysis of changes in temperature,pH,ammonium nitrogen and seed germination index in the process of high temperature aerobic composting to determine the maturity of compost,and provide a theoretical basis for the subsequent processing of pig manure compost.Through the experiment found the volatilization of H2S concentrated in the heating period and the early high temperature composting in the forced aeration static aerobic composting process.Combined with the aerobic compost maturity index to judge,control odour produces in the compost before 24dis the best period.2.Analysis of H2S,pH,temperature,oxygen content,water content and material ratio change curve in the composting process:H2S volatilization is the largest in high temperature stage,it has significant positive relation with pH,pH is higher,the more the more volatile odor,pH low,less odor volatilization.The negative correlation relationship with the content of oxygen.Closely related with moisture content changes,the volatile H2S gas increased with the moisture content,water content of the most suitable rate of 45%-65%.Comparison different material ratio test and the H2S gas concentration of the release has no relationship.3.Through the design of the bio packing tower,with Pig Manure Compost Particles decomposed as filler,H2S gas generating processing in the composting process,the removal effect of H2S inspection sterilized and non sterilized compost filler,different water content and different residence time,continuous operation time etc.The test results show that:the non sterilized packing removal efficiency has been to maintain the stability of the above 93%;45%water content under high load packing after maintain very high removal efficiency,the system to run for 300 hours packing still keep around 80%efficient;in the residence time under the condition of 40s processing of H2S gas,can extend packing the use of life,get the treatment effect is more ideal;determine the system running time of the packing tower is 300h,through the inverted upper and lower packing method makes the system maintain relatively high and stable removal efficiencySo to sum up,the co-treatment of the H2S in the biotrickling filter has a good cleaning efficiecy.It provides a available method to solve the pollution issue of odor containing with H2S. |
