Bhakta Sharma Hari, Panigrahi Sagarika, Dubey Brajesh K
Environmental Engineering and Management, Department of Civil Engineering, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal 721302, India.
Environmental Engineering and Management, Department of Civil Engineering, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal 721302, India.
Bioresour Technol. 2021 Aug;333:125187. doi: 10.1016/j.biortech.2021.125187. Epub 2021 Apr 16.
Food waste (FW) is difficult to manage during thermal treatment. In this study hydrothermal carbonization (HTC) of FW was carried out at increasing temperatures and retention times using the approach of reaction severities (logR0 = 5.31-7.09). The hydrochar sample with the best-obtained energy yield was further pelletized using molasses as a binder at different ratios (5%, 10%, 20% and 30%). A conceptual framework was proposed using the circular economy concept. As severity increases, hydrochar yield declines while its fuel properties improve. Decarboxylation and dehydration allow functional groups to become impaired, including C-O and -OH. Carbon microspheres were observed on the hydrochar surface due to extensive FW carbonization. The pellets with 30% molasses as binder showed the highest mass density (1683.24 kg/m3), while the energy density for it was 37.54 GJ/m. Food waste management will generate local employment and new business prospects by integrating HTC and pelletization.
食物垃圾（FW）在热处理过程中难以管理。在本研究中，采用反应强度方法（logR0 = 5.31 - 7.09），在不断升高的温度和保留时间下对食物垃圾进行水热碳化（HTC）。以不同比例（5%、10%、20%和30%）使用糖蜜作为粘结剂，对获得的能量产率最佳的水热炭样品进一步造粒。利用循环经济概念提出了一个概念框架。随着强度增加，水热炭产率下降，但其燃料特性改善。脱羧和脱水使官能团受损，包括C - O和 - OH。由于食物垃圾的广泛碳化，在水热炭表面观察到碳微球。以30%糖蜜作为粘结剂的颗粒显示出最高的质量密度（1683.24 kg/m³），而其能量密度为37.54 GJ/m。通过整合水热碳化和造粒，食物垃圾管理将创造当地就业机会和新的商业前景。
