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The impact of pyrolysis conditions on orange peel biochar physicochemical properties for sandy soil
Waste Management & Research ( IF 3.9 ) Pub Date : 2020-12-17 , DOI: 10.1177/0734242x20978456
Ali Abdelaal 1 , Snigdhendubala Pradhan 1 , Ahmed AlNouss 1 , Yongfeng Tong 2 , Tareq Al-Ansari 1, 3 , Gordon McKay 1 , Hamish R Mackey 1
Affiliation  

The citrus industry is considered one of the main contributors to agricultural waste. Peels are commonly used in the food industry or as feedstock in biorefining. In this study, the potential of waste orange peel biochar for agricultural applications in sandy soil was investigated. This will not only increase the percentage of agricultural waste recycling, but also lead to more sustainable agriculture with environmental benefits such as carbon sequestration. Biochar was produced through slow pyrolysis in the temperature range 300–600°C and at two holding durations (10 min and 60 min). Both factors had a significant impact on the physicochemical characteristics of biochar in the heating region 300–450°C. However, varying the holding time for pyrolysis temperatures beyond 450°C had a diminishing effect on biochar properties compared with the impact of increasing pyrolysis temperature. The study also looked at certain properties that are specific to agricultural application not previously reported for orange peel. Very high cation exchange capacities of 70 cmol kg−1 were achieved at 300°C, whereas water holding capacity was not strongly influenced by pyrolysis conditions. Preliminary planting tests indicate potential for improving agricultural sustainability in sandy soils. The technoeconomic analysis of biochar showed that the pyrolysis process can be profitable with sufficient plant capacity.



中文翻译:

热解条件对桔皮桔皮生物炭理化性质的影响

柑橘产业被认为是农业废弃物的主要贡献者之一。果皮常用于食品工业或用作生物精制的原料。在这项研究中,研究了废橙皮生物炭在沙质土壤中农业应用的潜力。这不仅会增加农业废弃物的循环利用百分比,而且还会带来更具可持续性的农业,并带来诸如固碳等环境效益。生物炭是通过在300–600°C的温度范围内并在两个保持时间(10分钟和60分钟)内缓慢热解而生产的。这两个因素对加热区300–450°C下的生物炭的理化特性都有重大影响。然而,与增加热解温度的影响相比,改变热解温度超过450°C的保温时间对生物炭性能的影响减小。该研究还研究了以前没有报道过的橙皮特定于农业应用的某些特性。70 cmol kg的极高阳离子交换容量在300℃下达到-1,而保水能力不受热解条件的强烈影响。初步的种植试验表明,有可能改善沙质土壤的农业可持续性。生物炭的技术经济分析表明,具有足够的工厂产能,热解过程可以获利。

更新日期:2020-12-17
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