Graduate Program in Environmental Technology, Universidade de Santa Cruz do Sul - UNISC, Avenida Independência, 2293, CEP, Santa Cruz do Sul, RS, 96815-900, Brazil.
Environ Sci Pollut Res Int. 2019 Apr;26(10):9931-9937. doi: 10.1007/s11356-019-04425-6. Epub 2019 Feb 9.
Water shortage is a current problem faced by many regions. The deterioration of water bodies driven by the directly discard of untreated wastewater worsens the water shortage and implies in more costly treatments to meet local standards for water quality. In rural areas, the problem is even worse, once conventional centralized treatment plants do not encompass them. Decentralized treatment systems must present low-cost, local availability, standards-meeting efficiency, and simplified operation. The present study examines the combined use of algae turf scrubber and down-flow vertical constructed wetlands for a University's sanitary wastewater treatment. After a hydraulic detention time of 21 days, the unit was able to reach 49%, 48%, 98%, 82%, 99.2%, 70.1%, 44%, 83%, 72%, 86%, 69%, 95%, and 99.9% for conductivity, total soluble solids, turbidity, apparent color, N-NH, total nitrogen, P-soluble, total carbon, chemical oxygen demand, inorganic carbon, TOC, Escherichia coli, and total coliforms. In accord to the Brazilian standard ABNT 13969/97, the treated effluent is eligible for reuse in floor and sidewalks washing, garden irrigation, and landscaping purposes.
水资源短缺是许多地区当前面临的一个问题。未经处理的废水直接排放导致水体恶化，加剧了水资源短缺，并需要更昂贵的处理措施来达到当地的水质标准。在农村地区，这个问题更加严重，因为传统的集中式处理厂无法覆盖到所有地区。分散式处理系统必须具有低成本、当地可用性、符合标准的效率和简化的操作。本研究探讨了藻类草皮洗涤器和下流式垂直人工湿地在大学卫生废水处理中的联合使用。水力停留时间为 21 天后，该单元对电导率、总可溶解固体、浊度、表观颜色、N-NH、总氮、P-可溶性、总碳、化学需氧量、无机碳、TOC、大肠杆菌和总大肠菌群的去除率分别达到 49%、48%、98%、82%、99.2%、70.1%、44%、83%、72%、86%、69%、95%和 99.9%。根据巴西标准 ABNT 13969/97，处理后的废水可用于冲洗地板和人行道、灌溉花园和景观美化等用途。
