Elimination of polyphenols toxicity from olive mill wastewater sludge by its co-composting with sesame bark

Use of earthworms (Eisenia fetida) to reduce phytotoxicity and promote humification of pre-composted olive oil mill wastewater

“…The stimulation of plant germination and growth could also be due to the reduction in the total (in particular in EP treatment) and monomeric phenolic compounds. This result is in accordance with that of Hachicha et al, 42 who demonstrated a direct relationship between the polyphenol content and toxicity. On the other hand, in the control a large increase in concentration of coumaric and protocatechuic acids was observed; these compounds represent the last degradation products of phenol monomers before cleavage of the aromatic ring, 43 so that their accumulation in the control material could be the result of the partial degradation of phenolic compounds but without reaching complete degradation.…”

Biological activity during co-composting of sludge issued from the OMW evaporation ponds with poultry manure—Physico-chemical characterization of the processed organic matter

“…To get the EU eco-label, composted material should contain no less than 20% OM, which was met at the end-product [40]. Furthermore, a C/N ratio of about 20 is enhanced by high mineral nutrients concentrations, indicative of various organic fertilisers like manure and composted vegetables [45].…”

Long-terms effects of irrigation with treated municipal wastewater on soil, yield and olive oil quality

“…TWW is typically reclaimed at the secondary level by using biological processes. These processes consist of eliminating biodegradable material by transforming it into microbial residues in the case of olive mill waste water treatment Hachicha et al (2009) andJarboui et al (2010).…”