Unit of Microbiology, Department of Biology and Geology, CITE II-B, Agrifood Campus of International Excellence ceiA3, CIAIMBITAL, University of Almeria, 04120, Almeria, Spain.
Unit of Microbiology, Department of Biology and Geology, CITE II-B, Agrifood Campus of International Excellence ceiA3, CIAIMBITAL, University of Almeria, 04120, Almeria, Spain.
J Environ Manage. 2022 Oct 1;319:115647. doi: 10.1016/j.jenvman.2022.115647. Epub 2022 Jul 8.
Olive mill wastewater (OMW) resulting from the olive oil extraction process is usually disposed of in evaporation ponds where it concentrates generating a sludge that pollutes the ponds nearby area. In this study, four bio-treatments were applied for the in-situ bioremediation and valorization of OMW sludge: Landfarming, phytoremediation, composting and vermicomposting. In all cases, the OMW sludge was added with organic residues (mushroom compost, rabbit manure, and chicken manure). The bio-treatments were carried out in duplicate, inoculated and non-inoculated, to determine the effect of a specialized fungal consortium (Aspergillus ochraceus H2 and Scedosporium apiospermum H16) on the efficacy of the bio-treatments. The evaluation of chemical parameters, toxicity, and functional microbial biodiversity revealed that the four techniques depleted the toxicity and favored the stimulation of functional microbiota. Landfarming and phytoremediation allowed the decontamination and improvement of soils. Composting and vermicomposting also offered high-quality products of agronomic interest. Inoculation improved the bioremediation effectiveness. Biological treatments are effective for the safe recovery of contaminated OMW sludge into high-quality services and products.
橄榄油提取过程中产生的橄榄磨废水（OMW）通常被排放到蒸发池，在那里浓缩生成污泥，污染附近的池塘。在这项研究中，应用了四种生物处理方法对 OMW 污泥进行原位生物修复和增值利用：土地填埋、植物修复、堆肥和蚯蚓堆肥。在所有情况下，OMW 污泥都添加了有机残留物（蘑菇堆肥、兔粪和鸡粪）。生物处理进行了重复，接种和未接种，以确定专门真菌联合体（赭曲霉 H2 和枝顶孢霉 H16）对生物处理效果的影响。化学参数、毒性和功能微生物生物多样性的评估表明，这四种技术都能去除毒性，并有利于功能微生物群的刺激。土地填埋和植物修复允许对土壤进行去污和改良。堆肥和蚯蚓堆肥也提供了具有农业价值的高质量产品。接种提高了生物修复的效果。生物处理方法可有效安全地回收受污染的 OMW 污泥，转化为高质量的服务和产品。
