高含固率污泥厌氧消化系统的启动方案与试验

摘要

高含固污泥厌氧消化技术是目前国内外的研究热点.该文以上海市白龙港污水处理厂脱水污泥稀释而成的含固率为10％的污泥作为研究对象,对高含固污泥厌氧消化技术进行了初步的探讨.试验结果表明,厌氧消化系统的进泥含固率升高至10％后,每投入1 m3的污泥产气约16-18 m3沼气,远高于现有浓缩污泥厌氧消化系统的产气率(8～10 m3沼气/m3污泥).高含固率污泥厌氧消化系统推荐采用清水启动策略,即消化罐内介质的初始状态为清水(二沉池出水),之后以不同投配率投加原污泥,避免系统启动过程中的VFA的积累,尤其是丙酸含量的积累.该研究成果不仅可为该污水处理厂现有污泥厌氧消化系统未来的扩建改造服务,而且可为国内同类工程提供借鉴和示范.%Anerobic digestion of high-solid content sludge is highly focused in the world. The technique was discussed in the paper, which studied the 10 %-solid-content sludge from Bailonggang WWTP as object. The results show that gas production of per cubic meter 10 %-solids-content sludge is about 16-18 m3 biogas/m3 sludge, higher than the existing anaerobic digestion gas production rate (8-10 m3 biogas/m3 sludge). The start-up solutions without inoculation sludge for sludge anaerobic digestion system is studied, and the solution of filled up with fresh water before start-up is recommended to avoid the accumulation of VFA, particularly the accumulation of propionic acid content. The research can not only be applied in the existing sewage treatment plant sludge anaerobic digestion, but also can provide a reference and demonstration for the same domestic projets.