有机垃圾液化厌氧发酵的研究  

Study on Anaerobic Fermentation of Liquefied Organic Waste

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作  者:唐雨[1] 韦程辉[1] 刘坤[1] 罗乃戈 钟顺[1] 林洋[1] 许瑞尧 莫德清[1] 

机构地区:[1]桂林电子科技大学生命与环境科学学院,广西桂林541004

出  处:《广东化工》2016年第23期20-21,共2页Guangdong Chemical Industry

基  金:广西科技开发计划项目(桂科攻14124004-3-9);大学生创新训练计划立项项目(201510595274);国家科技支撑项目(2015BAL04B03)

摘  要:本研究以水处理的思路将生活垃圾有机质液化后厌氧发酵,使其产气产肥,从而达到垃圾资源化的目的。研究讨论了浆化垃圾的p H对系统启动的影响;微生物的接种率和浆液的含水率及对浆化垃圾厌氧发酵产气的影响;发酵时间对发酵液氨氮浓度的影响。结果表明,浆化垃圾厌氧发酵启动过程p H呈下降趋势;进料3天后,系统p H维持在6左右可保证系统成功启动;适宜的接种率可提高厌氧发酵的速率,接种率为35%的物料产气速率最快;浆液含水率的增加有利于产气量的增大;当含水量达到70%时,单位物料产气量达到最高,为4.4 m L/g;发酵液中氨氮的浓度随发酵时间的增加而增大。The purpose of this study was to recycle of the organic solid waste based on the treatment of wastewater. The organic waste was first liquefied and then treated with the method of anaerobic fermentation. As a result, the gas and digestive was produced and utilized. The study discussed three questions. The fist is about the effect of pH on starting process for anaerobic fermentation system. Then two factors(vaccination rate and water content) influenced the gas production were discussed. At last the relationship between the concentration of ammonia nitrogen and the anaerobic fermentation time were studied. The results showed that the pH decreased in period of the anaerobic fermentation. After feeding three days later, keeping the pH value at 6 could make sure the anaerobic fermentation system was successfully started. An appropriate vaccination rate improved the efficiency of the anaerobic fermentation. When the vaccination rate of the materials was 35 %, the gas production rate was the fastest. The increasing water content was useful to increase the gas production. When the water content reached 70 %, the gas production was reached the highest level about 4.4 mL/g. The concentration of ammonia nitrogen in fermentation liquid increased with the anaerobic fermentation time.

关 键 词:有机垃圾 液化 厌氧消化 

分 类 号:X71[环境科学与工程—环境工程]

 

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