AMMONIA INHIBITION ON MESOPHILIC ANAEROBIC DIGESTION OF LINCOMYCIN BIOWASTE
As the C/N ratio of some kinds of antibiotic biowaste is relatively low, ammonia may be one of the key factors during anaerobic digestion. In this paper, batch experiments were conducted to estimate the inhibition by ammonia on anaerobic digestion of the biowaste generated from the lincomycin manufacturing. The effects of ammonia concentration on the performances of anaerobic digestion were compared at different total solid contents (3％, 5％, 8％, and 10％) and different ratios of inoculum to substrate (0.5, 1, 2, and 3). Water replacement, air stripping and struvite precipitation were attempted to confirm an advisable operation to alleviate the inhibition by ammonia. It is shown that lower total solid content and higher ratio of inoculum to substrate led to higher methane yield. Ammonia was found to start to affect methane production when the concentration in liquid was over 820 mg/L. Water replacement, struvite precipitation and air stripping reduced the liquid ammonia concentration by 100％, 74％ and 16％ separately. The diluted samples showed similar digestion performance compared to origin undiluted situation. The methane production was decreased by 16％ after air stripping, and was totally inhibited after treating by struvite precipitation. Water replacement was advisable to alleviate the ammonia inhibition during anaerobic digestion of lincomycin biowaste.
lincomycin biowaste antibiotics biowaste anaerobic digestion ammonia inhibition water replacement air stripping struvite precipitation
D. WU P.J. HE F. L(U) L.M. SHAO
Institute of Waste Treatment and Reclamation, College of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China
国际会议
北京
英文
1149-1154
2010-05-17（万方平台首次上网日期，不代表论文的发表时间）