School of Water, Energy and Environment, Cranfield University, United Kingdom.
School of Water, Energy and Environment, Cranfield University, United Kingdom; Freeform Design & Innovation Ltd., Flitwick, United Kingdom.
Sci Total Environ. 2021 Jan 20;753:141881. doi: 10.1016/j.scitotenv.2020.141881. Epub 2020 Aug 23.
The development of novel, non-sewered sanitation systems like the Nano Membrane Toilet requires thorough investigation of processes that may seem well-understood. For example, unlike the settling of primary sludge, the separation of solids from liquids in a small-volume container at the scale of a household toilet has not been studied before. In two sets of experiments, the settling of real faeces and toilet paper in settling columns and the settling of synthetic faeces in a conical tank are investigated to understand the factors affecting the liquid quality for downstream treatment processes. Toilet paper is found to be a major inhibitor to settling of solids. While a lower overflow point results in better phase separation through displacement of liquid, a higher overflow point and frequent removal of solids may be more advantageous for the liquid quality.
新型非污水卫生系统（如纳米膜厕所）的开发需要深入研究那些看似已经充分了解的过程。例如，与初级污泥沉淀不同，在家庭马桶规模的小容积容器中，从液体中分离固体的过程以前尚未进行研究。在两组实验中，通过沉降柱中实际粪便和卫生纸的沉降以及锥形罐中合成粪便的沉降，研究了影响下游处理过程中液体质量的因素。研究发现，卫生纸是固体沉降的主要抑制剂。虽然较低的溢流点通过置换液体可实现更好的相分离，但较高的溢流点和频繁清除固体可能对液体质量更为有利。
