Gutiérrez M C, Serrano A, Siles J A, Chica A F, Martín M A
Department of Inorganic Chemistry and Chemical Engineering, University of Cordoba, Campus Universitario de Rabanales, Edificio Marie Curie (C-3), Ctra. N-IV, km 396, 14071 Cordoba, Spain.
Department of Inorganic Chemistry and Chemical Engineering, University of Cordoba, Campus Universitario de Rabanales, Edificio Marie Curie (C-3), Ctra. N-IV, km 396, 14071 Cordoba, Spain.
J Environ Manage. 2017 Jul 1;196:387-393. doi: 10.1016/j.jenvman.2017.03.042. Epub 2017 Mar 21.
In this research study, the co-composting process of a waste mixture containing strawberry extrudate, fish waste, sewage sludge and bulking agent (SEFW, 190:1:22:90 ratio) was carried out in a dynamic-solid respirometer at pilot scale. The aerobic biodegradability of the mixture was previously ensured in a static-liquid respirometer. The advantages and drawbacks of the SEFW co-composting process were subsequently identified through the determination of respirometric activity and the physical-chemical characterization of the waste, as well as the monitoring of odor emissions. The evolution of the physical-chemical variables showed that pH increased slightly and that the organic matter concentration, expressed as volatile solids (VS, %) or oxidable organic carbon (C, %), decreased by around 15% in both cases and by approximately 56% in its biodegradable form (total organic carbon, TOC, %). The low odor emission rate (OER) in the least favorable scenario (the maximum odor generation) during SEFW composting was 1.59 ou/s, whereas this figure reached 3.52 ou/s when only the organic fraction of municipal solid waste (OFMSW) was composted. Consequently, the co-composting of SEFW is more favorable in terms of odor emission and permits the simultaneous treatment of different types of waste.
在本研究中，含草莓挤出物、鱼废料、污水污泥和膨松剂的混合废物（SEFW，比例为190:1:22:90）的共堆肥过程在中试规模的动态固体呼吸仪中进行。该混合物的好氧生物降解性先前已在静态液体呼吸仪中得到保证。随后通过测定呼吸活性、废物的物理化学特性以及监测气味排放，确定了SEFW共堆肥过程的优缺点。物理化学变量的变化表明，pH值略有升高，以挥发性固体（VS，%）或可氧化有机碳（C，%）表示的有机物浓度在两种情况下均下降了约15%，以其可生物降解形式（总有机碳，TOC，%）计算下降了约56%。在SEFW堆肥最不利的情况下（气味产生量最大），低气味排放率（OER）为1.59 ou/s，而仅对城市固体废物有机部分（OFMSW）进行堆肥时，这一数字达到3.52 ou/s。因此，SEFW的共堆肥在气味排放方面更有利，并允许同时处理不同类型的废物。
