杭州天子岭餐厨垃圾厌氧消化沼气项目案例研究

Case Study of Hangzhou Tianziling Food Waste Anaerobic Digestion Project

厌氧消化技术可以有效降解餐厨垃圾中的有机组分,同时回收毛油和生物质能(沼气),是一条环境友好、可持续发展的绿色之路。文章对杭州天子岭餐厨垃圾厌氧消化项目进行介绍,并监测分析了100天的稳定运行数据,包括TS浓度,COD,沼气产量,pH值及脱硫效率等。该项目日处理餐厨垃圾200 t,容积负荷3.5 kg COD·m^(-3)d^(-1),COD降解效率为86.9%±1.9%,日产沼气13500 m^3,同时可回收2.5%的毛油,具有很高的环境效益和社会效益。

With the effective degradation of organic fraction in food waste,and the recovery of crude oil and biomass energy(biogas),anaerobic digestion technology proves to be an environmental friendly and sustainable way for treating the food waste in China.This paper introduced the successful operation of Tianziling anaerobic food waste treatment project in Hangzhou,which treated 200 t of food waste per day adopting CSTR anaerobic reactor with volume of 3800 m 3×2.The running parameters of 100-day stable operation were detected and analyzed,including TS content,COD,biogas yield,pH and H 2S removal efficiency.The results showed that,with the organic loading of 3.5 kg COD·m-3 d-1,the COD removal efficiency reached 86.9%±1.9%.The project produced 13500 m 3·d-1 of biogas and recovered 5 t·d-1 crude oil.It is demonstrated that the project had very high environmental and social benefit.