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Treating wastewater under zero waste principle using wetland mesocosms
Frontiers of Environmental Science & Engineering ( IF 6.4 ) Pub Date : 2020-10-18 , DOI: 10.1007/s11783-020-1351-9
Safaa M. Ezzat , Mohammed T. Moustafa

The present investigation demonstrates the synergistic action of using a sedimentation unit together with Cyperus papyrus (L.) wetland enriched with zeolite mineral in one-year round experiment for treating wastewater. The system was designed to support a horizontal surface flow pattern and showed satisfactory removal efficiencies for both physicochemical and bacteriological contaminants within 3 days of residence time. The removal efficiencies ranged between 76.3% and 98.8% for total suspended solids, turbidity, iron, biological oxygen demand, and ammonia. The bacterial indicators (total and fecal coliforms, as well as fecal streptococci) and the potential pathogens (Escherichia coli, Staphylococcus aureus, and Pseudomonas aeruginosa) showed removal efficiencies ranged between 96.9% and 99.8%. We expect the system to offer a smart management for every component according to zero waste principle. The treated effluent was reused to irrigate the landscape of pilot area, and the excess sludge was recycled as fertilizer and soil conditioner. The zeolite mineral did not require regeneration for almost 36 weeks of operation, and enhanced the density of shoots (14.11%) and the height of shoots (15.88%). The harvested plant biomass could be a profitable resource for potent antibacterial and antioxidant bioactive compounds. This could certainly offset part of the operation and maintenance costs and optimize the system implementation feasibility. Although the experiment was designed under local conditions, its results could provide insights to upgrade and optimize the performance of other analogous large-scale constructed wetlands.



中文翻译:

湿地环境在零废物原则下处理废水

本研究表明,在为期一年的废水处理实验中,将沉降单元与富含沸石矿物的莎草纸莎草(L.)湿地一起使用具有协同作用。该系统旨在支持水平表面流型,并在停留时间3天之内显示出令人满意的物理化学和细菌污染物去除效率。对于总悬浮固体,浊度,铁,生物需氧量和氨气,去除效率介于76.3%和98.8%之间。细菌指标(全部和粪便大肠菌群以及粪便链球菌)和潜在病原体(大肠杆菌,金黄色葡萄球菌铜绿假单胞菌))显示去除效率介于96.9%和99.8%之间。我们希望该系统根据零浪费原则为每个组件提供智能管理。处理后的废水可用于灌溉试验区,多余的污泥可作为肥料和土壤改良剂回收利用。沸石矿物在手术后近36周内不需要再生,并提高了枝条的密度(14.11%)和枝条的高度(15.88%)。收获的植物生物量可能是有效的抗菌和抗氧化生物活性化合物的有利资源。这肯定可以抵消部分运营和维护成本,并优化系统实施的可行性。尽管实验是在当地条件下设计的,

更新日期:2020-10-30
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