Zhang Dongqing, H E Pinjing, Shao Liming
State Key Laboratory of Pollution Control and Resources Reuse, Key Laboratory of Yangtze River Water Environment, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China.
J Environ Sci (China). 2009;21(8):1162-8. doi: 10.1016/s1001-0742(08)62397-9.
The biopretreatment of municipal solid waste by a combined hydrolytic-aerobic process has become of great interest for biostabilization or biodrying. The study aimed at investigating the effect of leachate inoculum on the biopretreatment. During the hydrolytic stage, the inoculum addition at the ratio of leachate to waste (LWR) of 5% and 7% stimulated the start-up of hydrolysis and enhanced the hydrolysis rate by 27.4% and 24.2%, respectively; whereas the inoculation at LWR of 1% had almost no effect on the hydrolysis rate and the inoculation at LWR of 10% reduced the hydrolysis rate by 12.7%. During the subsequent aerobic stage, the inoculations at LWRs greater than 5% decreased organics degradation rate. As a whole, compared with none inoculation, the total degradation rates of organics for inoculating trials at LWRs of 5%, 7% and 10% decreased by 14.5%, 14.3% and 32.7%, respectively. Correspondingly, their net water removal rates were reduced by 4.4%, 5.8% and 19.0%. The inoculation at LWR of 1% could not significantly affect the biopretreatment. The inoculum addition at LWR of 5% and 7% could shorten hydrolytic stage and thus accelerate the whole combined process. Moreover, the inoculations at LWRs greater than 5% were favorable for lignocelluloses degradation.
通过水解-好氧联合工艺对城市固体废物进行生物预处理，在生物稳定化或生物干燥方面已引起广泛关注。该研究旨在调查渗滤液接种物对生物预处理的影响。在水解阶段，以5%和7%的渗滤液与废物比例（LWR）添加接种物刺激了水解的启动，水解速率分别提高了27.4%和24.2%；而以1%的LWR接种对水解速率几乎没有影响，以10%的LWR接种使水解速率降低了12.7%。在随后的好氧阶段，LWR大于5%时的接种降低了有机物降解率。总体而言，与不接种相比，LWR为5%、7%和10%的接种试验中有机物的总降解率分别降低了14.5%、14.3%和32.7%。相应地，它们的净脱水率分别降低了4.4%、5.8%和19.0%。以1%的LWR接种不会显著影响生物预处理。以5%和7%的LWR添加接种物可以缩短水解阶段，从而加速整个联合工艺。此外，LWR大于5%时的接种有利于木质纤维素的降解。
