Production Of Compost From Disposing Solid Wastes In Batu Tannery, Akaki Kality Woreda 05, Ethiopia

Abstract

Tanning industries generate significant amount of liming fleshing waste which needs alternative and proper treatment. This study was developed to utilization of liming fleshing waste (LFW) in combination with sawdust (SD), Spent Coffee Grounds (SCGS) as compost manure. The samples of the Three wastes were formed and combined in ratios (SD /SCGS/LFW) 1:1:1(Trial 1) 2:2:1(Trial2),SD/SCGS/LFW(8:1:1(Trial3),SD/SCGS/LFW(4:1:1(Trial4),SD/SCGS/LFW(3:1:1(Tr ial5) and Control(SD/SCGS(2:1)Trial 6.and to estimate tannery solid waste generation rate. The process was carried out using a plastic package. The 12 weeks of composting were done both in aerobic and anaerobic conditions. To maximize the process of composting, the mixture was rotated after every one week to keep the aeration. Physicochemical analysis was done on samples collected on 0, 30, 45, 60, 75, and 90 days. The average physicochemical findings of the matured compost are within the permissible limits provided by most countries’ guidelines. Compost obtained after 90 days composting was the result; In general, the average range of the trial composts are pH(7.33-7.54) with low levels of electrical conductivity (1.73- 1.89) μS/cm, Ash content(6.82-9.61)% Moisture content(34.17- 35.54) and low levels of nitrogen (0.81- 1.16)%, total Carbon Content((10.54 Although a germination index of 128.63, 50.14, 90.84, 102.47and 160.32% which represented the compost maturity, it was odorless, stable and earth smelling.