Izvorni znanstveni članak
Application of a Maturity-accelerating Reagent (MAR) to Food Wastes Composting Processes
Y. Li
; Energy and Environmental Research Center, North China Electric Power University, Beijing 102206, China
J. Liu
; Energy and Environmental Research Center, North China Electric Power University, Beijing 102206, China
G. Huang
; Environmental Systems Engineering Program, Faculty of Engineering, University of Regina, Regina, SK, S4S 0A2, Canada
H. Yu
; Environmental Systems Engineering Program, Faculty of Engineering, University of Regina, Regina, SK, S4S 0A2, Canada
K. An
; Energy and Environmental Research Center, North China Electric Power University, Beijing 102206, China
B. Zhang
; Environmental Systems Engineering Program, Faculty of Engineering, University of Regina, Regina, SK, S4S 0A2, Canada
Sažetak
In order to increase the degradation rate of organic materials and reduce ammonia emissions simultaneously during the aerobic composting period, a commercial maturity-accelerating reagent (MAR) was employed. Comparative composting experiments
were conducted: Run A with the addition of MAR in the composting mixture, and Run B without the addition of MAR, while some parameters such as organic carbon, ammonia, and pH were measured under controlled air flow rate in the composting process. After 26 days of composting, the experimental results revealed that the degradation rate in Run A (21 g kg–1 d–1 DM (dry mass)) was higher than that in Run B (18 g kg–1 d–1 DM) by 16.7 %, while ammoniacal N (NH3 and NH4+) retained in Run A was 13.6 g kg–1
DM, which was more than that in Run B (8.3 g kg–1 DM), possibly because struvite crystal was formed. Apparently, the application of MAR had a positive effect on composting wastes, not only promoting organic degradation and nitrogen conversion, but also improving the quality of the compost, to be used as soil amendment in agriculture.
Ključne riječi
Ammonia emissions; degradation rate; struvite crystal; ammoniacal nitrogen; oxygen uptake rate
Hrčak ID:
40932
URI
Datum izdavanja:
29.9.2009.
Posjeta: 888 *