Kinetics of organic matter removal and humification progress during sewage sludge composting

Waste Management
Dorota Kulikowska

Abstract

This study investigated the kinetics of organic matter (OM) removal and humification during composting of sewage sludge and lignocellulosic waste (wood chips, wheat straw, leaves) in an aerated bioreactor. Both OM degradation and humification (humic substances, HS, and humic acids, HA formation) proceeded according to 1. order kinetics. The rate constant of OM degradation was 0.196 d(-1), and the rate of OM degradation was 39.4 mg/g OM d. The kinetic constants of HS and HA formation were 0.044 d(-1) and 0.045 d(-1), whereas the rates of HS and HA formation were 3.46 mg C/g OM d and 3.24 mg C/g OM d, respectively. The concentration profiles of HS and HA indicated that humification occurred most intensively during the first 3 months of composting. The high content of HS (182 mg C/g OM) in the final product indicated that the compost could be used in soil remediation as a source of HS for treating soils highly contaminated with heavy metals.

References

Aug 4, 2004·Bioresource Technology·Nengwu ZhuHuiyue Qian
Sep 24, 2004·Waste Management·G F HuangB B Nagar
Mar 8, 2005·Environmental Pollution·Pellegrino ConteAlessandro Piccolo
Aug 12, 2008·Journal of Hazardous Materials·Lina LiuQiaoyun Huang
Oct 8, 2011·Bioresource Technology·Dorota Kulikowska, Ewa Klimiuk
Feb 2, 2013·Iranian Journal of Environmental Health Science & Engineering·Abdelhadi MakanMohammed Mountadar

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Citations

Feb 5, 2019·Environmental Science and Pollution Research International·Jishao JiangYunbei Li
Mar 22, 2019·Waste Management & Research : the Journal of the International Solid Wastes and Public Cleansing Association, ISWA·Irena Wojnowska-BaryłaTeodor Kielak
Feb 8, 2020·Journal of Environmental Health Science & Engineering·Mahdi FarzadkiaAli Koolivand

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