Microbial utilization and transformation of humic acid-like substances extracted from a mixture of municipal refuse and sewage sludge disposed of in a landfill

Autor:	W Pecher, Jacques Berthelin, Z Filip
Rok vydání:	2000
Předmět:	chemistry.chemical_classification Municipal solid waste Chemistry Health Toxicology and Mutagenesis General Medicine Biodegradation Toxicology Pollution Nutrient Mining engineering Environmental chemistry Humic acid Aerobie Microbial biodegradation Sludge Waste disposal
Zdroj:	Environmental Pollution. 109:83-89
ISSN:	0269-7491
DOI:	10.1016/s0269-7491(99)00229-8
Popis:	The purpose of the research was to establish whether humic acid-like substances (HA) related to municipal refuse disposed of in a landfill can resist microbial degradation and if they contribute, in that way, to long-term stabilization of landfill refuse. Using a mixture of 0.1 M Na(4)P(2)O(7) + 0.1 M NaOH, we extracted HA from municipal refuse mixed with sewage sludge and disposed of for up to 12 months, in a 40-m(3) model landfill. In laboratory experiments under aerobic conditions, up to 50% of HA was utilized as a supplementary source of nutrients by an assemblage of soil microorganisms in only 21 days. The microbial utilization was enhanced to over 80%, and up to 98%, respectively, if HA served as the sole source of carbon or nitrogen. Remaining HA which could be re-isolated from microbial cultures were lower in carbon (
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fcd8e758f17e8dd08f0d1a5ec6d8043b https://doi.org/10.1016/s0269-7491(99)00229-8 Zobrazit plný text záznamu Full Text from ScienceDirect