Production of feed and fertilizer from water Hyacinth plants in the tropics |
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| Institution: | 1. Farming Systems Ecology, Plant Sciences, Wageningen University, Droevendaalsesteeg 1, 6708 PB Wageningen, The Netherlands;2. Centre for Crop Systems Analysis, Plant Sciences, Wageningen University, Droevendaalsesteeg 1, 6708 PB Wageningen, The Netherlands;3. School of Graduate Studies, Plant Sciences, Ambo University, P.O. Box 37, Ambo, Ethiopia;1. Department of Mechanical Engineering and Centre for Composite Materials, Kalasalingam Academy of Research and Education, Virudhunagar, Tamil Nadu, India;2. Department of Computer Science Engineering, Kalasalingam Academy of Research and Education, Virudhunagar, Tamil Nadu, India;3. Department of Mechanical Engineering, Kalasalingam Academy of Research and Education, Virudhunagar 626126, India;1. Centre for the Environment, Indian Institute of Technology Guwahati, Guwahati, 781039, Assam, India;2. Department of Civil Engineering, Indian Institute of Technology Guwahati, Guwahati, 781039, Assam, India;1. School of Mechanical Engineering, Sathyabama Institute of Science and Technology, Chennai, 600119, India;2. Department of Automobile Engineering, Vel Tech Dr. RR and Dr. SR Institute of Science and Technology, Chennai, 600062, India;3. Department of Mechanical Engineering, Lakireddy Bali Reddy College of Engineering, Mylavaram, AP, 521230, India;4. Department of Automobile Engineering, Madras Institute of Technology, Chennai, 600044, India;5. Operation & Efficiency Division, North Chennai Thermal Power Station, Chennai, 600120, India;6. Department of Mechanical Engineering, Panimalar Engineering College, Chennai, 600123, India |
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| Abstract: | Water hyacinth grows ubiquitously in natural water bodies in the tropics. If allowed to propagate without control, it can cause deterioration of water quality and create problems with water uses. However, water hyacinth has been used for wastewater treatment, and as an animal feed and soil conditioner. This paper reports a case study on silaging and composting of water hyacinth plants generated from ponds treating pig farm wastewater. The water hyacinth plants mixed with molasses and pig manure at the ratios of 85:10:5 (% wet weight) were found to be optimum for silage production; the silaging period was 28 days. The silaged products contained 16% protein and 18% dry matter, suitable for use as animal feed. The composted water hyacinth plants, whose raw materials included pig manure and leaves, contained N, P and K about 2.2, 1.5, and 0.8% (dry weight), respectively. An economic analysis of the two recycling options suggested that some benefits could be gained from these practices after 5 years of operation. These two options were found to be technically and economically feasible to be implemented at farm scale levels. |
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