| Abstrakt: |
Eutrophication is an environmental problem caused by the increase of nitrogen and phosphate into the waters. Cengklik Reservoir is located in Boyolali Regency where the majority of the population are farmers and fish cultivators. The use of chemical fertilizers for agriculture and fish farming using the floating net cage method is thought to be one of the causes of eutrophication in the Cengklik Reservoir. Based on these problems, this paper examines the use of water hyacinth for biogas, fish and livestock feed, fertilizer and briquettes by considering data on the potential of natural resources in Ngemplak District in an effort to reduce the challenges of water weeds in Cengklik Reservoir for environmental resilience management. Water hyacinth with a composition of about 15-40% can be used as a substitute for flour in fish feed, where it is known that there are 309 fish cages. The combination of dry water hyacinth with cow dung can produce a biogas yield of 64%, besides that the combination can produce compost containing a total of N (1.12%), C (12.63%), F (1591 ppm) and K (17.314 ppm). Briquettes from water hyacinth can help become a source of energy because it produces a calorific value of 14.55 MJ/kg. Seeing this potential, Ngemplak District, especially Ngargorejo Village, has considerable potential in the agricultural, livestock and fishery sectors. Utilization of water hyacinth for biogas, fish and livestock feed, fertilizer and briquettes can be one of the recommendations for sustainable reservoir management. [ABSTRACT FROM AUTHOR] |
