CSIR-National Environmental Engineering Research Institute (CSIR-NEERI), Nehru Marg, Nagpur 440 020, India.
CSIR-National Environmental Engineering Research Institute (CSIR-NEERI), Nehru Marg, Nagpur 440 020, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201 002, Uttar Pradesh, India.
Sci Total Environ. 2021 Sep 1;785:147243. doi: 10.1016/j.scitotenv.2021.147243. Epub 2021 Apr 21.
The presence of heat, methane (CH) and oxygen in landfill sub-surface causes initiation of spontaneous waste ignition posing severe environmental impacts. A municipal solid waste (MSW) reactor (trough) was designed to monitor landfill gases (LFGs) i.e., CH and CO and its potential from different waste categories (synthetic waste, fresh waste, 3-month, 6-month, 3-year and 5-year-old waste) collected from open MSW dumpsite. The quantity of cellulose (C), hemicellulose (H) and lignin (L) contents (C + H: L) present in organic waste fraction of each waste category was determined. Results showed that fresh waste which has higher ratio of C + H: L is responsible for maximum CH and CO generation i.e., 31,660 and 46,078 ml/g of volatile solid, respectively. The ratio of C + H: L observed in fresh waste, 3-month, 6-month, 3-year and 5-year-old waste was 2.62, 1.70, 1.32, 1.21 and 1, respectively. The study also showed that LFG generation is directly proportional to lignocellulose biomass contents present in MSW. Artificial neural network (ANN) modelling was used for the cross validation of CH yield (valuable product) which showed ±4% error between experimental and predicted data.
在垃圾填埋场的地下，热量、甲烷（CH）和氧气的存在会引发垃圾的自发燃烧，从而对环境造成严重影响。设计了一个城市固体废物（MSW）反应器（槽），用于监测来自露天 MSW 垃圾场收集的不同废物类别（合成废物、新鲜废物、3 个月、6 个月、3 年和 5 年旧废物）的填埋气体（LFG），即 CH 和 CO 及其潜力。确定了每个废物类别的有机废物部分中纤维素（C）、半纤维素（H）和木质素（L）含量（C + H：L）的数量。结果表明，新鲜废物中 C + H：L 的比例较高，是 CH 和 CO 生成的主要原因，分别为 31,660 和 46,078 ml/g 挥发性固体。新鲜废物、3 个月、6 个月、3 年和 5 年旧废物中 C + H：L 的比例分别为 2.62、1.70、1.32、1.21 和 1。研究还表明，LFG 的产生与 MSW 中存在的木质纤维素生物质含量直接成正比。人工神经网络（ANN）模型用于 CH 产量（有价值的产品）的交叉验证，实验数据和预测数据之间的误差在±4%以内。
