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

Abstract:

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.

• Periodical: Advanced Materials Research (Volumes 955-959)
• Pages: 2944-2948
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.955-959.2944
• Online since: June 2014
• Authors: Hong Yu Zhang, Guo Xue Li, Jin Bing Yang, Qing Yuan Yang
• Keywords: Bentonite, Composting, H₂S, Kitchen Waste, NH₃, β-Cyclodextrin

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