Integrated Waste Management Combining Anaerobic and Aerobic Treatment: A Case Study

Agroindustrial composts to reduce the use of peat and fungicides in the cultivation of muskmelon seedlings

“…Another index of compost maturity, considering that the microbial metabolism occurs in the water‐soluble phase, is water‐soluble carbon (WSC) with values <0.5 g kg −1 , or water‐soluble carbon:nitrogen ratio (WSC/N) with values <0.50 . Similar values were also shown by Banegas et al and Bustamante et al when using different types of raw materials…”

“…The lowest values of dehydrogenase activity were observed in composts that contained as raw materials artichoke sludge, artichoke residues, pruning wastes and mature compost (C2, C3 and C4) a fact that is in accord with the temperature profiles of the piles, showing that the lowest temperatures were reached in the thermophilic phase. Temperature profiles of the different piles indicate the microbial activity during the process, considering that microorganisms play key roles in the transformation of the raw materials into compost . The lower temperatures reached by piles C2, C3 and C4 were probably due to the polyphenolic compounds from artichoke and the incorporation as raw material of artichoke and mature compost, which showed low biodegradability .…”

“…Temperature profiles of the different piles indicate the microbial activity during the process, considering that microorganisms play key roles in the transformation of the raw materials into compost. 29,33 The lower temperatures reached by piles C2, C3 and C4 were probably due to the polyphenolic compounds from artichoke 34 and the incorporation as raw material of artichoke and mature compost, which showed low biodegradability. 12,35 Similar temperature profiles were observed during composting of pig slurry digestates plus pepper residue, 36 anaerobic sewage sludge plus rice rusk 37 or wood powder 27 as bulking agents.…”

Evaluation of use of biogas plant digestate as fertilizer in alfalfa and winter wheat

“…Anaerobic decomposition converts organic waste into two products: biogas and fermented biomass (digestate). This biological process does not only produce renewable energy (biogas), but it also reduces the emission of greenhouse gasses [20][21][22]. Particular care has to be taken in this biological process because of its intrinsic environmental and safety dangerousness like in other agricultural processes [23][24][25].…”

Valorization of winery and oil mill wastes by microbial technologies

“…The incorporation of different processes defined in this review will certainly have a positive effect on the scientific, technological, economic, environmental, and social points of view, not only for the main production but also for a wide range of co-products generated from wine and oil industries including composting (Bustamante et al, 2014), biofuels (Georgieva & Ahring, 2007), chemicals (Apohan & Yesilada, 2011;Romero et al, 2007;Abrunhosa et al, 2013), biomass itself (Masghouni & Hassairi, 2000) and other compounds (Cerruti et al, 2011;Crognale et al, 2006;Gomes et al, 2013;Santos et al, 2008). The economic and technological aspects of the processes should be enhanced to offer a realistic approach to valorization of winery and olive oil mill by-products.…”