Assessment and Remediation Group, Barr Engineering Co., Minneapolis, MN 55435, USA.
Civil & Environmental Engineering, Colorado State University, 1372 Campus Delivery, Fort Collins, CO 80523, USA.
Waste Manag. 2021 Jun 15;129:62-75. doi: 10.1016/j.wasman.2021.05.009. Epub 2021 May 22.
The objective of this study was to evaluate waste biodegradation and biochemical compatibility for different waste co-disposed with municipal solid waste (MSW). Laboratory-scale reactors were operated with MSW co-disposed with special solid waste, liquid waste, or sludge waste. Early and aggressive addition of liquid wastes during reactor startup did not stimulate anaerobic decomposition of fresh MSW. The majority of the liquid waste reactors were acid stuck and had leachate pH < 6 and chemical oxygen demand in the range of 50,000 mg-O/L. The majority of liquid wastes in this study were not observed to be effective anaerobic inoculums and would not be recommended as the sole moisture source for bioreactor landfills. Enhanced early methane production was observed in the MSW reactors co-disposed with sludge (anaerobic and industrial) relative to the landfill leachate control reactors and all other waste combinations evaluated. Methane generation was observed in reactors operated with foundry waste or gypsum board co-disposed with MSW. Despite biochemical methane potential (BMP) results that indicated methane generation would be inhibited with these two waste streams, co-disposing with MSW did not completely inhibit anaerobic degradation. The BMP assays provided methane yield under ideal conditions, but did not capture other benefits of co-disposal (e.g., impacts of moisture addition). A potential co-disposal waste source should not be ruled out by BMP results alone.
本研究的目的是评估不同废物与城市固体废物（MSW）共处置时的废物生物降解和生化相容性。使用 MSW 与特殊固体废物、液体废物或污泥废物共处置的实验室规模反应器进行操作。在反应器启动期间早期和激进地添加液体废物不会刺激新鲜 MSW 的厌氧分解。大多数液体废物反应器都出现酸滞留，浸出液 pH 值<6，化学需氧量在 50000mg-O/L 范围内。本研究中的大多数液体废物并未被观察到是有效的厌氧接种物，因此不建议将其作为生物反应器垃圾填埋场的唯一水分来源。与垃圾渗滤液对照反应器和评估的所有其他废物组合相比，共处置污泥（厌氧和工业）的 MSW 反应器中观察到早期甲烷产量增强。在与 MSW 共处置的铸造废物或石膏板反应器中观察到甲烷生成。尽管生化甲烷潜力（BMP）结果表明这两种废物流会抑制甲烷生成，但与 MSW 共处置并没有完全抑制厌氧降解。BMP 测定法在理想条件下提供了甲烷产率，但没有捕获共处置的其他好处（例如，水分添加的影响）。潜在的共处置废物来源不应仅通过 BMP 结果排除在外。
