Molecular behaviour of humic acid-like substances during co-composting of olive mill waste and the organic part of municipal solid waste

Use of the co-composting time extract agar to evaluate the microbial community changes during the co-composting of activated sludge and date palm waste

“…/NO 3 -B1, which provides information on the importance of organic matter oxidation and a significant degree of stability of substrate. As indicated in the literature these values confirm the maturity of the compost (Barje et al 2012;El Fels et al 2014b). …”

“…1), the temperature indicates a typical co-composting pattern characterised by two major phases: A thermophilic (stabilization) phase is characterised by a rise in temperature, which peaked at 65°C. This is the result of intense microbial activity resulting from the degradation of the simple molecules present in the substrate (Barje et al 2012;El Fels et al 2014a, b). The maturation phase is characterised by a decrease of temperature due to the exhaustion of easily metabolisable organic compounds from the medium, with compounds that are only resistant to degradation (e.g.…”

“…It has been demonstrated that composts can be applied to agricultural fields as long-term fertiliser to improve soil structure (Jakobsen 1995;Barje et al 2012). The evolution and the performance of the composting process are dependent on the microorganisms that populate composted substrates and are able to degrade the organic waste (Chroni et al 2009).…”

Monitoring transitory profiles of leachate humic substances in landfill aeration reactors in mesophilic and thermophilic conditions

“…On the other hand, the existent alkyl carbon was lost as CO 2 during humification, as aliphatic structures also presented a carbon source for microorganism [47]. The ambiguity in the temporal variation of H/C and N/C ratios in HAs was also observed in other relative studies [31,32].…”

Recovery of sludge from the sewage treatment plant in the city of Fez (STEP) through the composting process

“…The analysis of the germination index results shown in Table 4 indicates that the mean values of five replicates are an indicator of maturity and the stability of the compost (GI> 50%) [41]. …”