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Development and experimental validation of the composition and treatability of a new synthetic bathroom greywater (SynGrey)
Environmental Science: Water Research & Technology ( IF 5 ) Pub Date : 2017-09-15 00:00:00 , DOI: 10.1039/c7ew00304h
Kyle A. Thompson 1, 2, 3, 4 , R. Scott Summers 1, 2, 3, 4 , Sherri M. Cook 1, 2, 3, 4
Affiliation  

Bathroom greywater, including bathing and handwashing wastewater, can be reused for toilet flushing to reduce 35% of residential water demand. Despite these potential savings, greywater reuse is underutilized and the development of innovative treatment technologies is impeded by a lack of validated synthetic recipes to support laboratory-scale experimentation. The objective of this work was to develop and validate a new, representative synthetic bathroom greywater to enable reproducible and translatable treatment studies. A literature review compiled data from 49 real bathroom greywaters, which was used to set 20 water quality criteria for a synthetic recipe. A new synthetic greywater – SynGrey – was developed to match real bathroom greywater composition across all criteria and was found to be more representative of real greywater than existing recipes. SynGrey's validity was evaluated by comparing its treatability against a real bathroom greywater including via chlorination, aerobic biodegradation, adsorption, and coagulation. Total chlorine residuals were statistically similar between SynGrey and the real bathroom greywater, but doses were an order of magnitude higher than for drinking water. The readily biodegradable fraction of total chemical oxygen demand was about 40% for both greywaters. The dissolved organic carbon percent removal by activated carbon was similar between SynGrey and the real greywater (±14%). Alum coagulation achieved comparable effluent turbidity, but SynGrey had a much more narrow dose curve, and coagulation achieved substantially greater total organic carbon removal from the real greywater. SynGrey represents a superior synthetic recipe for laboratory-scale experimentation to facilitate the evaluation, selection, and optimization of greywater reuse technologies.

中文翻译:

新型合成浴室灰水(SynGrey)的成分和可处理性的开发和实验验证

浴室中的灰水,包括沐浴和洗手废水,可以重复用于洗手间,以减少35%的住宅用水需求。尽管有这些潜在的节省,但由于缺乏经过验证的合成配方来支持实验室规模的实验,灰水的再利用仍未得到充分利用,创新处理技术的发展也受到了阻碍。这项工作的目的是开发和验证一种新的,有代表性的合成浴室灰水,以实现可重复和可翻译的治疗研究。文献综述汇编了49种实际浴室灰水的数据,这些数据被用来为合成配方设定20条水质标准。开发了一种新的合成灰水-SynGrey,以使其符合所有标准的实际浴室灰水成分,并且发现它们比现有配方更能代表真实的灰水。SynGrey的有效性是通过将其可处理性与真正的浴室灰水进行比较来评估的,包括通过氯化,好氧生物降解,吸附和凝结。SynGrey和实际浴室的灰水之间的总氯残留量在统计学上相似,但剂量比饮用水高一个数量级。对于两种灰水,总化学需氧量中易于生物降解的部分约为40%。SynGrey和纯灰水之间的活性炭去除溶解有机碳的百分比相似(±14%)。明矾凝结法可达到相当的污水浊度,但SynGrey的剂量曲线要窄得多,凝结法可从真正的灰水中获得更大的总有机碳去除率。SynGrey代表了用于实验室规模实验的卓越合成配方,可促进灰水回用技术的评估,选择和优化。
更新日期:2017-09-25
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