Tolksdorf J, Cornel P
Technische Universität Darmstadt Franziska-Braun-Str. 7, Darmstadt 64287, Germany E-mail:
Water Sci Technol. 2017 Sep;76(5-6):1132-1139. doi: 10.2166/wst.2017.293.
The infrastructure approach SEMIZENTRAL has been developed for fast growing cities, to meet their challenges regarding water supply as well as biowaste and wastewater treatment. The world's first full-scale SEMIZENTRAL Resource Recovery Center (RRC) has been implemented in Qingdao (PR China). Greywater (GW) and blackwater (BW) are collected and treated separately. Measurement of influent concentrations differ significantly from the design values. Thus, the operation strategy for the RRC had to be adapted. Amongst other reasons, the changed influent characteristic was caused by misconnections of GW and BW sewers. Already a misconnection rate of 6-8% requires an extension of the GW treatment process for nitrification/denitrification to fulfill effluent standards. Hence, measures should be taken to avoid or reduce misconnections. Nonetheless, in a semi-centralized scale (>10,000 inhabitants) a 100% avoidance might not be possible. Thus, consequences from misconnections should be considered during the design of source-oriented infrastructure systems.
SEMIZENTRAL基础设施方法是为快速发展的城市开发的，以应对其在供水以及生物垃圾和废水处理方面的挑战。世界上首个全规模的SEMIZENTRAL资源回收中心（RRC）已在中国青岛建成。灰水（GW）和黑水（BW）被分别收集和处理。进水浓度的测量值与设计值有显著差异。因此，RRC的运行策略必须进行调整。除其他原因外，进水特性的变化是由GW和BW下水道的错误连接造成的。即使6-8%的错误连接率也需要扩展GW处理工艺以进行硝化/反硝化，以满足排放标准。因此，应采取措施避免或减少错误连接。尽管如此，在半集中规模（>10000居民）下，100%避免可能是不可能的。因此，在设计面向源头的基础设施系统时应考虑错误连接的后果。
