Czestochowa University of Technology, Institute of Environmental Engineering, Brzeznicka 60a, 42-200 Czestochowa, Poland E-mail:
Water Sci Technol. 2013;68(8):1697-706. doi: 10.2166/wst.2013.402.
The purpose of this work is to study the characteristics of the co-composting of municipal solid waste (MSW), sewage sludge, grass and sawdust. Differing proportions of biodegradable waste were investigated through changes of temperature, oxygen consumption, organic matters, moisture content, carbon, nitrogen, C/N ratio as well as heavy metals and pathogen microorganisms content. The present study has shown that addition of MSW above 10% had a negative impact on the composting process. The initial C/N of the mixtures with a higher MSW content was below 18. Lower losses of organic matter occurred during composting for the mixture with the highest addition of MSW. Although studies have shown that composting is a good method for the disposal of organic waste additional research is required in order to optimize the organic and nitrogen compounds degradation during the co-composting process. In conclusion, a 1:4:4:1 mixture of MSW:sewage sludge:grass:sawdust is recommended because it can achieve high temperature as well as the highest organic matter degradation and highest N content in the final composting product. The concentration of heavy and light metals in all composts was within the limits of regulation of the Polish Minister of Agriculture and Rural Development.
本工作旨在研究城市固体废物（MSW）、污水污泥、草和木屑共堆肥的特点。通过改变温度、耗氧量、有机物、含水量、碳、氮、C/N 比以及重金属和病原体微生物含量来研究不同比例的可生物降解废物。本研究表明，添加超过 10%的 MSW 对堆肥过程有负面影响。高 MSW 含量混合物的初始 C/N 低于 18。在堆肥过程中，高 MSW 添加量的混合物中有机物损失较低。尽管研究表明堆肥是处理有机废物的好方法，但仍需要进一步研究，以优化共堆肥过程中有机和氮化合物的降解。总之，推荐使用 MSW:污水污泥:草:木屑为 1:4:4:1 的混合物，因为它可以达到高温以及最终堆肥产品中最高的有机物降解和最高的 N 含量。所有堆肥中的重金属和轻金属浓度均在波兰农业和农村发展部规定的限值范围内。
