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Nutrients release pattern during co-composting of poultry litter and different sources of fast food wastes

Azeem, A.N. Chaudhry, M. Faheem, M. Imran, A. Riaz, A. Satti

DOI: https://dx.doi.org/10.12692/ijb/5.12.105-115

Int. J. Biosci. 5(12), 105-115. December, 2014. (PDF)

Abstract:

Today our earth is experiencing various serious environmental challenges, among which one of the most critical is associated with raw poultry litter and fast food waste. These challenges could be mitigated by stabilizing its nutrients with co-composting. In the present study, co-composting of poultry litter (PL) and fast food waste (FFW) was carried out in a pile under aerobic condition to analyze the  chemical changes during the composting process. The experiment was conducted with complete randomized design with five treatments, i.e., T1= PL+FFW (100:0); T2= PL+FFW (75:25); T3= PL+ FFW (50:50); T4= PL+ FFW (25:75); T5= PL+FFW (0:100), and three replications. Samples were collected at 15 days interval for the duration of 105 days and analyzed for C: N ratio, macro-nutrients (N, P and K) and micronutrients (Cu, Fe, Zn & Mn) in each treatment. Treatment PL+FFW (75:25) attained C:N ratio up to the desired level (12:1). While N, P and K concentrations recorded at 105th day of composting for this treatment were 3.3%, 1.06% and 2.71%, respectively. The concentration of Cu, Fe, Zn and Mn of poultry litter and fast food waste (75:25) were 21.92 mg kg-1, 210.25 mg kg-1, 288.63 mg kg-1 and 172.05 mg kg-1 respectively, at the 105th day of composting. The study depicted that the poultry litter and fast food waste in 75:25 ratio released maximum amount of macro nutrients, i.e. N, P and K, as compared to other treatments. Hence, it can be considered as a more appropriate ratio for co-composting of poultry litter and fast food waste. This study would help in conversion of poultry litter and fast food waste to bio-fertilizer as a feasible and potential technology in the future to maintain the natural resources and to reduce the impact on environmental quality.

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