Formula of Goat Manure in Sludge Cake Wastewater Treatment Plant as Organic Fertilizer Rivka Yuliany, Nur Kusmiyati
Email: rivkayuliany07[at]student.ub.ac.id- nurkusmiyati[at]ub.ac.id
Food Science and Biotechnology Department, Faculty of Agricultural Technology, Brawijaya University
Abstract
The use of activated sludge in wastewater treatment plants (WWTP) in industry gives a by-product in the form of sludge cake. Sludge cake presents a new problem for the environment because its accumulation causes the land to become unproductive, disrupts aesthetics, increases microbial activity, and pollutes water and soil which can be harmful to humans and the environment. PT X is one of the industries that produce 80 kg/day of sludge cake. Based on laboratory results, X WWTP sludge cake has the potential to be used as organic fertilizer. However, the use of sludge cake as organic fertilizer does not meet fertilizer quality standards and does not provide optimal results for plants. Goat manure is known to 2increase the organic fertilizer content of sludge cake in accordance with fertilizer quality standards. This research was conducted using four treatments, namely sludge cake without treatment, and the addition of goat manure 20%, 30%, and 40%. The stages of the research include the preparation of raw materials, the manufacture of organic fertilizers, and testing the content of organic fertilizers. The results showed that there was an increase in physical and chemical parameters on organic fertilizers, namely pH (6.6), C (22.14%), N (3.55%), P (4.65%), K (0.45%), Ca (0.52%), and Mg (0.26). ), as well as a decrease in water content (15.40%) at the end of composting. The addition of goat manure with a combination of other additives to X WWTP sludge cake can meet organic fertilizer quality standards. 30% goat manure is the best formula to increase organic fertilizer.
