Document Type : Review Article
Post graduate student at Faculty of Graduate Studies and Environmental Research, Ain Shams University
Faculty of Graduate Studies and Environmental Research, Ain Shams University
Central Laboratory for Agricultural Climate (CLAC), Agricultural Research Center (ARC)
Sewage sludge contains 97-99% water. Because of such high water content, sewage sludge should be thickened or dewatered for ease of handling and utilization in many purposes. In this work, plants were used to dewater or thicken sludge. Also, cultivating plants help mitigating the impacts of greenhouse gases by sequestering carbon dioxide. In this work, five (200 L) pilot-scale sludge drying ponds were constructed and operated to dewater sewage sludge. They were cultivated by four types of gramineae family, namely, Niseila (Paspalidium geminatum), Common Reed (Phragmites australis), Sammar (Cyperus alopecuroides), and Pardee (Cyperus papyrus) either individually or in combinations. It was found that relative growth rate (RGR) can be used as a growth indicator. The results showed that the highest RGR was found on day 12, 90-95 % dewatering efficiency at day 30 in case of Niseila (Paspalidium geminatum). It was clear from the results obtained that the studied plants have ability to grow in sewage sludge matrix andto speed up the process of sludge dewatering.