a Centre for Pollution Control & Environmental Engineering , Pondicherry University , Puducherry , India.
b Department of Health, Safety, Environment and Civil Engineering , University of Petroleum and Energy Studies , Dehradun , India.
Int J Phytoremediation. 2019;21(2):160-169. doi: 10.1080/15226514.2018.1488814. Epub 2019 Jan 31.
In a first-ever report on this subject, it is shown that a common amphibious plant joyweed (Alternanthera sessilis) can be used in rapid and efficient treatment of biodegradable wastewaters, typified by domestic sewage. The plant was effective when used indoors under artificial lighting, as well as outdoors. It enabled treatment of sewage, varying widely in strength (from 300 mg/L to 1800 mg/L in chemical oxygen demand), to the extent of 78.9-83.9%. It was also able to remove biological oxygen demand, suspended solids, phosphorous, nitrogen, and the heavy metal copper to the extent of 87%, 93%, 45%, and 43%, respectively. Over 99% of total coliforms, faecal coliforms, and faecal streptococci were also removed. The treatment was very swiftly achieved, at a hydraulic retention time of just 6 h, in the "sheet flow root level" (SHEFROL) bioreactor developed earlier by us and of which a patent claim has been registered. The findings indicate that A. sessilis has the potential to affect primary, secondary, and tertiary treatment of domestic sewage along with significant pathogen removal in a single process step when used in SHEFROL bioreactors.
这是首次就该主题提交的报告，表明一种常见的两栖植物水蕹菜（Alternanthera sessilis）可用于快速高效地处理可生物降解废水，典型的废水有生活污水。该植物在人工照明下室内使用以及户外使用均有效。它可以处理强度差异很大的污水（化学需氧量从 300mg/L 到 1800mg/L），处理程度达 78.9-83.9%。它还可以去除生物需氧量、悬浮物、磷、氮和重金属铜，去除率分别为 87%、93%、45%和 43%。超过 99%的总大肠菌群、粪大肠菌群和粪链球菌也被去除。在我们之前开发的“表流根部”（SHEFROL）生物反应器中，水力停留时间仅为 6 小时，即可迅速实现处理，该生物反应器已获得专利申请。研究结果表明，水蕹菜在 SHEFROL 生物反应器中具有单步处理去除主要、次要和三级处理生活污水以及显著病原体的潜力。
