Development of Green Energy Block Made from Paper Mill Waste Sludge

Abstract

Sludge from paper mill wastewater treatment plant is the residual composed of fibres, fibre particles and miscellaneous debris. Sludge with high fibre contents were collected from BP paper mill industry. They were retreated by 2 days drying and mixing dried sludge with tapioca starch as ratios were: 100:0, 95:5, 90:10, 85:15 and 80:20(sludge: tapioca starch). To make the green energy block by using screw-press machine compressed sludge that mixed with various ratios of tapioca starch. A size of green energy block was 6 inches diameter, 2 inches high and 150 g. weight. Energy values were tested by using Bomb-calorimeter measurement instrument. The results of testing found: the best ratio of green energy compressed for high heating value was 95:5(sludge : tapioca starch by weight) and the maximum heating value was about 19,638 J/g. This green energy block made from waste of paper mill wastewater treatment plant is a way of recycle waste to be energy and reducing waste from industry.