Key Laboratory of Marine Environment and Ecology, Ministry of Education, College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China.
Bioresour Technol. 2012 Aug;117:368-72. doi: 10.1016/j.biortech.2012.04.010. Epub 2012 Apr 11.
S-TE (solubilization by thermophilic enzyme) digestion was always used for waste sludge solubilization and reduction with the theory of lysis enzyme secreted by thermophilic bacteria. The effects of pretreated times, pH and sludge concentrations on S-TE digestion were investigated to determine the optimum S-TE conditions on hydrogen fermentation from waste sludge. The experimental results showed that the protein, carbohydrate and SCOD (soluble chemical oxygen demand) were released after S-TE pretreatment, and the optimal conditions on sludge solubilization were 12-16 h, pH 7-9 and 4.31 g/L TSS, respectively. The optimal S-TE conditions on hydrogen yields were 8h, pH 6 and 6.83 g/L TSS (total suspended solid), and the maximum hydrogen yields were 30.80 ml/g VSS (volatile suspended solid), 33.75 ml/g VSS and 42.90 ml H2/g VSS, respectively. It was concluded that the optimal S-TE digestion conditions on sludge solubilization were different from that on hydrogen production.
S-TE（嗜热酶增溶）消化法一直被用于通过嗜热菌分泌的裂解酶理论来实现废污泥的增溶和减少。研究了预处理时间、pH 值和污泥浓度对 S-TE 消化的影响，以确定从废污泥中进行氢发酵的最佳 S-TE 条件。实验结果表明，S-TE 预处理后释放出蛋白质、碳水化合物和 SCOD（可溶化学需氧量），污泥增溶的最佳条件分别为 12-16 小时、pH 值 7-9 和 4.31g/L TSS。最佳 S-TE 条件下的氢气产率为 8 小时、pH 值 6 和 6.83g/L TSS（总悬浮固体），最大氢气产率分别为 30.80ml/g VSS（挥发性悬浮固体）、33.75ml/g VSS 和 42.90ml H2/g VSS。结论是，污泥增溶的最佳 S-TE 消化条件与产氢的最佳条件不同。
