This study evaluated the efficiency of an on-site household greywater treatment system for indirect human reuse and for domestic lawn irrigation. This helps in the reduction in the disparity between water demand and supply that is facing the rapidly increasing global populace. Natural household greywater was settled and then conventionally filtered by using two types of non-woven geotextile media; thermally bonded and needle punched. A third woven cotton textile media was also experimented and all the non-woven geotextile media were tested in single and double layers and combined with the woven cotton textile layer. The different filter media configurations were tested for a period of one year operation (six runs) with two filtration rates of 15.00 and 25.00 m³/m²/day for each run. For all runs, the final treated effluent was disinfected using calcium hypochlorite prior to reuse. The double layer needle punched non-woven geotextile media together with the woven cotton textile media gave the best removal efficiencies; 96.34 ± 1.85% for turbidity 81.87 ± 6.43% for BOD₅, 97.49 ± 1.68% for TSS, 75.35 ± 3.99% for CODt, 99.59% for E.coli. The soluble CODs removal efficiencies were negligible (below 3%) in the first four runs with non-woven geotextile media and increased to 28.05 ± 4.29% when the woven cotton textile media was added. In general, the system was found to save about 63% of the daily water consumption reflecting a net 22.50% reduction in the daily water billing costs for the whole household.

本研究评估了现场家庭灰水处理系统在间接人类再利用和家庭草坪灌溉方面的效率。这有助于缩小全球快速增长的人口面临的水资源供需差距。天然家用灰水沉淀，然后使用两种类型的无纺布土工布介质进行常规过滤;热粘合和针刺。还试验了第三种机织棉纺织介质，所有无纺土工布介质都进行了单层和双层测试，并与机织棉纺织层相结合。不同的过滤介质配置进行了为期一年的运行测试（六次运行），每次运行的过滤速率分别为 15.00 和 25.00 m³/m²/天。对于所有运行，最终处理的流出物在回用前使用次氯酸钙进行消毒。双层针刺无纺布土工布介质与机织棉纺织介质一起给出了最佳的去除效率;浊度为 96.34 ± 1.85%，BOD₅ 为 81.87 ± 6.43%，TSS 为 97.49 ± 1.68%，CODt 为 75.35 ± 3.99%，大肠杆菌为 99.59%。在前四次运行中，使用无纺布土工布介质的可溶性 CODs 去除效率可以忽略不计（低于 3%），而当添加机织棉纺织介质时，可溶性 COD 去除效率提高到± 4.29%。总体而言，该系统可节省约 63% 的每日用水量，反映整个家庭的每日水费收费净额减少 22.50%。