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| Influence of Ventilation on H2S and NH3 Emissions During Kitchen Waste Compositing |
| Received:February 03, 2015 |
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| KeyWord:kitchen waste;composting;ventilation;hydrogen sulfide;ammonia |
| Author Name | Affiliation | E-mail | | ZHANG Yu-dong | Environment Engineering, College of Resource and Environment Science, Jilin Agricultural University, Changchun 130118, China
Beijing Building Materirals Academy of Science Research/Solid Waste Resources Utilization and Energy Saving Building Materials State Key Laboratory, Beijing 100041, China | | | ZHANG Hong-yu | Beijing Building Materirals Academy of Science Research/Solid Waste Resources Utilization and Energy Saving Building Materials State Key Laboratory, Beijing 100041, China | | | GU Jun | Beijing Building Materirals Academy of Science Research/Solid Waste Resources Utilization and Energy Saving Building Materials State Key Laboratory, Beijing 100041, China | | | WANG Ji-hong | Environment Engineering, College of Resource and Environment Science, Jilin Agricultural University, Changchun 130118, China | wjh489@126.com |
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| Abstract: |
| Waste composting has been considered as a safe and efficient measure to dispose kitchen waste in recent years. Kitchen waste composting would produce a great quantity of H2S and NH3. To reduce emissions of H2S and NH3, a composting experiment was carried out with kitchen waste and corn stalk as materials under aerobic conditions to investigate H2S and NH3 emissions from kitchen waste under different ventilation rates marked T1, T2, T3 and T4(0.5,1.0,2.2 and 3.2 m3·m-3 material·h-1). Temperature, O2, H2S, NH3, GI, EC, TOC, and TN were monitored during composting. During 30 days of composting, cumulative emissions of H2S in T1, T2, T3 and T4 were respectively 103.17, 54.10, 35.58 and 44.38 mg·kg-1 DM. Compared with T1, H2S emissions were reduced by 47.6%, 65.5% and 57.0% for T2, T3, and T4, respectively. Cumulative emissions of NH3 during 30 days were 14.79、406.50、1475.63 and 2274.35 mg·kg-1 DM for T1, T2, T3 and T4, respectively. These findings show that H2S emissions decrease with increasing ventilation within a certain range. The emissions of NH3 increase with ventilation rates. Taking into comprehensive consideration of non-hazard index, H2S and NH3 emissions, and compost toxicity test, it is recommended that an optimized method for composting kitchen waste would be 85:15 of kitchen waste to stalk ratio and 2.2 m3·m-3 material·h-1 of ventilation rate. |
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