Padilla, Bienvenido Huerto Jr creator Edwards, Peter Chairperson Kim, Kong-Hwan Examination Committee Wee, Kok Leong Examination Committee Government of Australia Scholarship Donor text series technical report th Bangkok Asian Institute of Technology 1983 continuing eng 78 p. In the light of providing cheap and readily available nutrition for fish food production, a study on aerobic composting of water hyacinth on a pilot scale was undertake n. In this work, 20 pilot-size piles of chopped water hyacinth under treatments of varying pile size and moisture levels were composted over periods ranging from 5 to 2 0 weeks. During these periods analyses were conducted on a weekly basis to evaluate the physical and bio-chemicals changes occurring in these piles as degradation proceeded. Three experiments were conducted : (1) piles comparing 1.4, 1.0 and 0.6m heights; (2) piles comparing low range moisture levels of 55%, 65% and 75%; and (3 ) piles comparing high range moisture levels of 75% , 85% and 93% (fresh) . included in the last experiment was a pile mixture of rice straw and water hyacinth at a moisture content of a bout 75% , to ascertain the possibility of eliminating the drying procedure . All treatments were set up in duplicate. At the outset, 1.4 m initial pile height and 70% moisture were considered optimum levels for efficient composting. Five weeks was taken as an adequate composting time to ensure high nitrogen an d phosphorus conservation and a bout 75% decomposition of degradable organics . However, results of a water hyacinth-rice straw mixture , though acceptable , need to be compared with other moisture level treatments. A thesis submitted in partial fulfillment of the requirement for the degree of Master of Engineering, School of Environment, Resources and Development Thesis (M.Eng.) - Asian Institute of Technology, 1983 Water-hyacinth Asian Institute of Technology. http://203.159.5.9/ait-thesis/detail.php?q=B20940 http://203.159.5.9/ait-thesis/detail.php?q=B20940 110910 20260818084431.0