Department of Environmental Technologies, Faculty of Sea and Environmental Sciences, University of Cádiz, 11510 Puerto Real, Cádiz, Spain.
Bioresour Technol. 2010 Apr;101(8):2706-12. doi: 10.1016/j.biortech.2009.11.101. Epub 2009 Dec 29.
Regulations regarding the land application of sewage sludge require the performance of highly efficient treatments for pathogen reduction, such as temperature-phased anaerobic digestion (TPAD). Several semi-continuous experiments with different solid residence times (SRTs) have been made to find the best combination - TPAD 15/15, TPAD 5/15, TPAD 3/15 or TPAD 3/12. TPAD systems showed better performance in terms of VS destruction, gas production, sludge dewaterability, and process stability at total SRT of 15 days, compared with single-stage mesophilic or thermophilic digestion at the same SRT. Average VS reductions (VSR) using the overall TPAD 5/15 (78%), TPAD 3/15 (87%), and TPAD 3/12 (87%) were significantly higher than mesophilic control operating with an SRT of 15 days (40% VSR). The best results were obtained for TPAD 3/15 with 0.62 LCH(4) g(-1) VS(r), faecal coliform 10(3) MPN/g TS, and Salmonella spp. 1 MPN/4 g TS. Although both TPAD 3/15 and TPAD 3/12 were efficient enough to obtain Class A biosolids.
有关污水污泥土地应用的法规要求进行高效的病原体减少处理，例如温度阶段性厌氧消化（TPAD）。已经进行了几个具有不同固体停留时间（SRT）的半连续实验，以找到最佳组合 - TPAD 15/15、TPAD 5/15、TPAD 3/15 或 TPAD 3/12。与相同 SRT 的单相中温和高温消化相比，总 SRT 为 15 天时，TPAD 系统在 VS 破坏、气体产生、污泥脱水性能和过程稳定性方面表现出更好的性能。使用整体 TPAD 5/15（78%）、TPAD 3/15（87%）和 TPAD 3/12（87%）的平均 VS 减少量（VSR）明显高于中温控制在 15 天的 SRT（40% VSR）。TPAD 3/15 的效果最佳，其 0.62 LCH（4）g（-1）VS（r）、粪便大肠菌群 10（3）MPN/g TS 和沙门氏菌 spp. 1 MPN/4 g TS。尽管 TPAD 3/15 和 TPAD 3/12 都足以获得 A 类生物固体。
