Effects of adding bulking agents on the biodrying of kitchen waste and the odor emissions produced

With the development of urbanization, kitchen waste and garden waste have become an important part of municipal solid waste (MSW), which is in urgent need of resource treatment. This study investigated the impacts of garden waste as auxiliary materials on maturity and odor emissions (NH3 and H2S) during kitchen waste composting. The result showed that the combined composting product of kitchen waste and garden waste achieved the maturity effect, and the co-composting effect was better than that of separate composting of kitchen waste. Meanwhile, compared with the separate composting treatment of kitchen waste, the co-composting treatment of kitchen waste and garden waste can effectively reduce the cumulative emissions of H2S by more than 85%, and effectively reduce the cumulative emissions of NH3 by more than 75%. This study provides a technical reference for the green fertilizer utilization of kitchen waste and garden waste.

Download Full-text

Optimization of bio-drying of kitchen waste: inoculation, initial moisture content and bulking agents

Journal of Material Cycles and Waste Management ◽

10.1007/s10163-015-0450-3 ◽

2015 ◽

Vol 19 (1) ◽

pp. 496-504 ◽

Cited By ~ 10

Author(s):

Xiao Song ◽

Jiao Ma ◽

Jiandong Gao ◽

Yanbo Liu ◽

Yongce Hao ◽

...

Keyword(s):

Moisture Content ◽

Initial Moisture Content ◽

Bulking Agents ◽

Kitchen Waste

Download Full-text

Effect of Bentonite and β-Cyclodextrin Addition on H2S and NH3 Emissions during Kitchen Waste Composting

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.955-959.2944 ◽

2014 ◽

Vol 955-959 ◽

pp. 2944-2948

Author(s):

Hong Yu Zhang ◽

Guo Xue Li ◽

Jin Bing Yang ◽

Qing Yuan Yang

Keyword(s):

Odor Control ◽

Kitchen Waste ◽

Designed Experiments ◽

Odor Emissions

In order to reduce odor emissions such as NH3 and H2S, this study designed experiments to investigate the effects of bentonite and β-cyclodextrin on producing and releasing H2S and NH3 during kitchen waste composting. All experiments were performed in simulated composting device. The results showed that the productions of H2S were reduced by 16.4% and 13.7% for the treatments of 2% and 3% that compared to addition 1% bentonite, the productions of NH3 were reduced by 0.1% and 54.8% for the treatments of 1% and 3% that compared to 2% bentonite addition. For the treatments of β-cyclodextrin addition, the productions of H2S were reduced by 33.9% and 31.0% for the treatments of 1% and 2% that compared to addition 3% β-cyclodextrin, the productions of NH3 were reduced by 30.8% and 23.5% for the treatments of 1% and 3% that compared to 2% β-cyclodextrin addition. After integrating the reduction of NH3 and H2S emission, 3% bentonite and 1% β-cyclodextrin addition are the preferred during kitchen waste composting. Compared with bentonite and β-cyclodextrin, β-cyclodextrin is the better additive for the odor control during kitchen waste composting.

Download Full-text