污泥与餐厨垃圾联合厌氧发酵产氢余物产甲烷条件优化研究

研究了21、37和47 d产甲烷物料代替新鲜污泥接种于污泥与餐厨垃圾联合厌氧发酵产氢余物的厌氧发酵产甲烷情况,发现接种47 d产甲烷物料的消化系统在最佳接种量50%条件下的产甲烷效能显著优于接种新鲜污泥的消化系统,不仅提高了产甲烷率,还大大缩短了消化时间。并且3种消化系统产甲烷率和比产甲烷率均为47 d37 d21 d,分别为3.78、3.88、6.15 mL/g和0.172、0.277、0.559 mL/(g·d),完成产甲烷过程的消化时间为47 d37 d21 d。在一定的消化时间范围内,产甲烷菌被驯化时间越长,接种于产氢余物中的产甲烷效能越好。

Study on the optimum conditions of methanogenesis of residue from anaerobic fermentative hydrogen production using combined sludge and food waste

Anaerobic fermentative methane production of residue from anaerobic fermentative hydrogen production using combined sludge and food waste which was inoculated with 21 d, 37 d and 47 d methane production substrate instead of fresh sludge was studied. The results show that the methane production effect of the digestion system inoculated with 47 d methane production substrate under the condition of the optimum inoculation volume 50% is significantly superior to the system inoculated with fresh sludge. It has not only improved the methane potential, but also obviously reduced the digestion time. Moreover, both of the methane production potential and average methane production rate were 47 d>37 d>21 d, which were 3.78, 3.88, 6.15 mL/g and 0.172, 0.277, 0.559 mL/(g·d), respectively, and the digestion times were 47 d<37 d<21 d. In a certain range of digestion time, the longer the methanogens was domesticated, the better effect of methane production was achieved when inoculated in residue of hydrogen production.