Kadaverugu, Rakesh and Shingare, Rita P and Raghunathan, Karthik and Juwarkar, A A and Thawale, Prashant Ramchandra and Singh, Sanjeev (2016) The role of sand, marble chips and Typha latifolia in domestic wastewater treatment – a column study on constructed wetlands. Environmental Technology, 37 (19). pp. 2508-2515. ISSN 0959-3330, ESSN: 1479-487X

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The relative importance of sand, marble chips and wetland plant Typha latifolia is evaluated in constructed wetlands (CWs) for the treatment of domestic wastewater intended for reuse in agriculture. The prototype CWs for the experiments are realized in polyvinyl chloride columns, which are grouped into four treatments, viz. sand (<2 mm) + Typha latifolia (cattail), sand, marble chips (5–20 mm) + cattail and marble chips. The removal percentage of organic and nutritional pollutants from the wastewater is measured at varying hydraulic retention time in the columns. The statistical analysis suggests that the main effects of sand and cattail are found to be significant (p < .05) for the removal of biological oxygen demand and chemical oxygen demand from the wastewater. The presence of cattail significantly (p < .01) contributes to the conversion of total nitrogen in wastewater into NO− 3 by fostering the growth of favorable microbes for the nitrification. The removal of PO3− 4 and turbidity from the wastewater is significantly (p < .01) influenced by sand than the presence of cattail. The maximum PO3 4− adsorption capacity of the sand is estimated to be 2.5 mg/g. Marble chips have significantly (p < .01) influenced the removal of SO2− 4 and its maximum removal capacity is estimated to be 9.3 mg/g. The negative correlation between the filter media biofilm and column hydraulic conductivity is also reported for all the treatments. Thus, the findings of this study elucidate the role of low-cost and easily available filter media and it will guide the environmental practitioners in designing cost-effective CWs for wastewater treatment.

Item Type: Article
Uncontrolled Keywords: Constructed Wetlands; Sand; Marble Chips; Typha Latifolia; Wastewater Treatment
Subjects: Environmental Biotechnology
Water Treatment
Water Use
Depositing User: Er Karthik Raghunathan
Date Deposited: 31 Mar 2017 09:43
Last Modified: 31 Mar 2017 09:43
URI: http://neeri.csircentral.net/id/eprint/806

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