Lodz University of Technology, Institute of Fermentation Technology and Microbiology, Wólczańska 171/173, 90-924 Łódź, Poland.
Lodz University of Technology, Faculty of Process and Environmental Engineering, Wólczańska 213, 90-924 Łódź, Poland.
Waste Manag. 2015 Jun;40:119-26. doi: 10.1016/j.wasman.2015.03.021. Epub 2015 Mar 31.
Slaughterhouse wastes (SHW) are potentially very attractive substrates for biogas production. However, mono-digestion of these wastes creates great technological problems associated with the inhibitory effects of ammonia and fatty acids on methanogens as well as with the foaming in the digesters. In the following study, the co-digestion of slaughterhouse wastes with sewage sludge (SS) was undertaken. Batch and semi-continuous experiments were performed at 35°C with municipal sewage sludge and pig SHW composed of meat tissue, intestines, bristles and post-flotation sludge. In batch assays, meat tissue and intestinal wastes gave the highest methane productions of 976 and 826 dm(3)/kg VS, respectively, whereas the methane yield from the sludge was only 370 dm(3)/kg VS. The co-digestion of sewage sludge with 50% SHW (weight basis) provided the methane yield exceeding 600 dm(3)/kg VS, which was more than twice as high as the methane production from sewage sludge alone. However, when the loading rate exceeded 4 kg VS/m(3) d, a slight inhibition of methanogenesis was observed, without affecting the digester stability. The experiments showed that the co-digestion of sewage sludge with large amount of slaughterhouse wastes is feasible, and the enhanced methane production does not affect the digester stability.
屠宰场废物（SHW）是沼气生产的极具吸引力的潜在底物。然而，这些废物的单消化会产生与氨和脂肪酸对产甲烷菌的抑制作用以及消化器中的泡沫相关的巨大技术问题。在以下研究中，采用屠宰场废物与污水污泥（SS）共消化。在 35°C 下进行了批处理和半连续实验，使用城市污水污泥和由肉组织、肠、鬃毛和浮选后污泥组成的猪 SHW。在批处理试验中，肉组织和肠废物的甲烷产量最高，分别为 976 和 826 dm(3)/kg VS，而污泥的甲烷产量仅为 370 dm(3)/kg VS。污水污泥与 50%SHW（重量基础）的共消化提供了超过 600 dm(3)/kg VS 的甲烷产率，比单独使用污水污泥的甲烷产率高出两倍以上。然而，当负荷率超过 4 kg VS/m(3)d 时，观察到产甲烷作用略有抑制，但不影响消化器稳定性。实验表明，污水污泥与大量屠宰场废物的共消化是可行的，并且增强的甲烷生产不会影响消化器稳定性。
