Abstract
Geotextile tube is an innovative product developed by sewing permeable high strength geotextiles to form large tubes. The main application of geotextile tube is dewatering of dredged materials sediments and industrial waste slurry. The present study describes the performance of dairy sludge dewatering using hanging bag test. The effect of the addition of coagulant has been studied. Alum was used as a coagulant. Dewatering was carried out for dairy sludge without the addition of alum and dairy sludge mixed with alum. The environmental analysis was carried out of the sludge before and after hanging bag test to study the quality of filtrate. Also, analysis of filter cake was done to check its suitability for reuse thus proving zero waste condition. It was found that geotextile tube was efficient in dewatering the sludge and its efficiency increases with the addition of a coagulant. Dairy sludge dewatering without the addition of alum showed the maximum flow rate of 4.95 cm3/sec and dewatering time of 2280 min as compared to dairy sludge dewatering with the addition of alum which showed the maximum flow rate of 7.66 cm3/sec and dewatering time of 2160 min.
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