Calorific and greenhouse gas emission in municipal solid waste treatment using biodrying

B. Zaman, W. Oktiawan, M. Hadiwidodo, E. Sutrisno, P. Purwono
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引用次数: 11

Abstract

BACKGROUND AND OBJECTIVES: Urban intensity and activities produce a large amount of biodegradable municipal solid waste. Therefore, biodrying processing was adopted to ensure the conversion into Refuse Derived Fuel and greenhouse gases. METHODS: This study was performed at a greenhouse, using six biodrying reactors made from acrylic material, and equipped with digital temperature recording, blower, and flow meters. The variations in airflow (0, 2, 3, 4, 5, 6 L/min/kg) and the bulking agent (15%) were used to evaluate calorific value, degradation process and GHG emissions. FINDINGS: The result showed significant effect of airflow variation on cellulose content and calorific value. Furthermore, the optimum value was 6 L/min/kg, producing a 10.05% decline in cellulose content, and a 38.17% increase in calorific value. Also, the water content reduced from 69% to 40%. The CH4 concentration between control and biodrying substantially varied at 2.65 ppm and 1.51 ppm respectively on day 0 and at peak temperature. Morever, the value of N2O in each control was about 534.69 ppb and 175.48 ppb, while the lowest level was recorded after biodrying with 2 L/min/kg airflow. CONCLUSION: The calorific value of MSW after biodrying (refuse derived fuel) ranges from 4,713 – 6,265 cal/g. This is further classified in the low energy coal (brown coal) category, equivalent to <7,000 cal/g. Therefore, the process is proven to be a suitable alternative to achieve RDF production and low GHG emissions.
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生物干燥处理城市生活垃圾的热量和温室气体排放
背景和目的:城市强度和活动产生大量可生物降解的城市固体废物。因此,采用生物干燥处理,以确保转化为垃圾衍生燃料和温室气体。方法:本研究在温室中进行,使用六个由丙烯酸材料制成的生物干燥反应器,并配备数字温度记录,鼓风机和流量计。利用气流(0、2、3、4、5、6 L/min/kg)和填充剂(15%)的变化来评估热值、降解过程和温室气体排放。结果:气流变化对纤维素含量和热值有显著影响。最佳处理条件为6 L/min/kg,纤维素含量降低10.05%,发热量提高38.17%。同时,水含量从69%降低到40%。对照和生物干燥之间的CH4浓度在第0天和峰值温度分别为2.65 ppm和1.51 ppm,变化很大。各对照N2O值分别为534.69 ppb和175.48 ppb,以2 L/min/kg气流进行生物干燥后N2O值最低。结论:生活垃圾生物干燥后的热值(垃圾衍生燃料)为4,713 ~ 6,265 cal/g。这进一步被归类为低能煤(褐煤)类别,相当于<7,000卡路里/克。因此,该工艺被证明是实现RDF生产和低温室气体排放的合适替代方法。
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来源期刊
CiteScore
7.90
自引率
2.90%
发文量
11
审稿时长
8 weeks
期刊最新文献
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