餐厨垃圾水解酸化性能的研究

Research on Hydrolysis and Acidification Performance of Food Waste

采用批式进料方式,研究了不同进料负荷和不同接种量时餐厨垃圾水解酸化的效果,探索了酸化阶段发酵液中的p H、VFA含量和产物中主要成分的变化规律。结果发现,不同有机负荷进料时水解酸化过程在前4 d基本完成,反应后期有机负荷不同,发酵类型也有所不同。40 g(TS)/L负荷进料时水解酸化效果比较好,水解酸化产物中主要成分为乙醇和乙酸,乙醇和VFA含量高。餐厨垃圾在接种率为30%时,反应能够获得目标酸化产物乙醇和乙酸,比不接种和接种率为50%时效果明显要好。

By means of batch type feeding,the effects of hydrolysis and acidification of food waste in different load and different inoculation amount were studied.The changing rule of pH value,volatile fatty acids （VFA） content and the main component of the products in the cidification phase was explored.Hydrolysis acidification process basically completed in the first 4 days though different organic load.In the late of response,the different organic load the fermentation type is also different.When the load of feed is 40 g（TS）/L,the hydrolytic acidification effect is better,main products are ethanol and acetic acid,and ethanol and VFA concentration is high.The reaction can get target acidification products-ethanol and acetic acid when the vaccination rate was 30％.And the effect is better than no vaccinated and the vaccination rate is 50％.