Cemagref, UR GERE, 17 Avenue de Cucillé, CS 64427, F-35044 Rennes, France.
Waste Manag. 2010 Mar;30(3):402-14. doi: 10.1016/j.wasman.2009.10.019. Epub 2009 Dec 1.
This paper aims to compare household waste, separated pig solids, food waste, pig slaughterhouse sludge and green algae regarding their biodegradability, their stabilization kinetics and their temperature rise during composting. Three experiments in lab-scale pilots (300 L) were performed for each waste, each one under a constant aeration rate. The aeration rates applied were comprised between 100 and 1100 L/h. The biodegradability of waste was expressed as function of dry matter, organic matter, total carbon and chemical oxygen demand removed, on one hand, and of total oxygen consumption and carbon dioxide production on the other. These different variables were found closely correlated. Time required for stabilization of each waste was determined too. A method to calculate the duration of stabilization in case of limiting oxygen supply was proposed. Carbon and chemical oxygen demand mass balances were established and gaseous emissions as carbon dioxide and methane were given. Finally, the temperature rise was shown to be proportional to the total mass of material biodegraded during composting.
本文旨在比较家庭垃圾、分离的猪固体物、食物垃圾、养猪场污泥和绿藻的可生物降解性、稳定动力学及其在堆肥过程中的升温情况。每种废物在实验室规模的试验中进行了三次实验（300 L），每个实验都在恒定的充气率下进行。应用的充气率在 100 和 1100 L/h 之间。废物的生物降解性一方面表示为干物质、有机物、总碳和化学需氧量的去除，另一方面表示为总需氧量和二氧化碳的产生。这些不同的变量被发现密切相关。还确定了每种废物稳定所需的时间。提出了一种在限制氧气供应的情况下计算稳定持续时间的方法。建立了碳和化学需氧量质量平衡，并给出了二氧化碳和甲烷的气态排放。最后，结果表明，堆肥过程中的升温与生物降解的总物质质量成正比。
