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Viteri G, Aranda A, Díaz de Mera Y, Rodríguez A, Rodríguez D, Rodríguez-Fariñas N, Valiente N, Seseña S. Effects of massive desiccation of olive waste residues on air quality. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2024; 359:124542. [PMID: 39002752 DOI: 10.1016/j.envpol.2024.124542] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2024] [Revised: 07/09/2024] [Accepted: 07/11/2024] [Indexed: 07/15/2024]
Abstract
New industries are proliferating in the recovery of agri-food wastes, such as those involved in the revaluation of alperujo, generated in the production of olive oil. Despite the potential environmental benefits, their activity is not exempt from new forms of emissions, aggravated by the massification of waste treatments. This work reports a six-month field campaign carried out in an alperujo desiccation plant which can serve as a proxy for these emerging industries in the Mediterranean countries. The study focused on air quality parameters, covering criteria pollutants, metals and microbiological load of particulate matter and the characterization of volatile organic compounds (VOCs). The results show a slight contribution of the factory to the NOx levels in the surroundings (3.0-12.5 μg/m3). Statistically significant effects were not observed for ozone, CO, SO2, or PM10. Concerning the levels of metals, concentrations were low and calculated health risk indexes indicated safe conditions in the area. The most abundant elements were Na (6.5 × 102 ng/m3), K (4.0 × 102 ng/m3), Al (2.7 × 102 ng/m3), Zn (2.1 × 102 ng/m3), Ca (2.16 × 102 ng/m3), Fe (3.6 × 101 ng/m3) and Mg (3.2 × 101 ng/m3). Bacterial counts, with a mean value of 15.9 CFU/m3, showed a seasonal shift, mainly explained by weather (air moisture and temperature) and PM2.5 concentration. The genomic analysis showed Cutibacterium as the dominant genus during the cold months while Bacillus predominated in the warm season. The VOCs with higher average concentrations were acetic acid (130 μg/m3), nonanoic acid (124 μg/m3), benzoic acid (29.7 μg/m3), octanoic acid (19.9 μg/m3) and nonanal (4.70 μg/m3), with the rest of compounds in concentrations below 4 μg/m3. Odorant pollutants with the greatest contribution to olfactory nuisance were aldehydes (from pentanaldehyde to decanaldehyde), acetic acid and phenol. Although the observable effects of the waste treatments were low, several parameters showed an influence on the environment which should be assessed to foresee and prevent long-term consequences.
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Affiliation(s)
- Gabriela Viteri
- Facultad de Ciencias y Tecnologías Químicas, Avenida Camilo José Cela s/n, 13071, Ciudad Real, Spain
| | - Alfonso Aranda
- Facultad de Ciencias y Tecnologías Químicas, Avenida Camilo José Cela s/n, 13071, Ciudad Real, Spain.
| | - Yolanda Díaz de Mera
- Facultad de Ciencias y Tecnologías Químicas, Avenida Camilo José Cela s/n, 13071, Ciudad Real, Spain
| | - Ana Rodríguez
- Facultad de Ciencias Ambientales y Bioquímica, Avenida Carlos III s/n, 45071, Toledo, Spain
| | - Diana Rodríguez
- Facultad de Ciencias Ambientales y Bioquímica, Avenida Carlos III s/n, 45071, Toledo, Spain
| | | | - Nicolás Valiente
- Departamento de Ciencia y Tecnología Agroforestal y Genética, Campus Universitario s/n, 02071, Albacete, Spain
| | - Susana Seseña
- Facultad de Ciencias Ambientales y Bioquímica, Avenida Carlos III s/n, 45071, Toledo, Spain
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Pegu R, Prakash A, Borah P, Paul S, Bhattacharya SS. Unveiling the earthworm-associated preferential remediation of emerging organic pollutants and heavy metals in MSW-based vermicomposting systems: Insights through the lens of multivariate techniques and novel empirical models. CHEMOSPHERE 2024; 363:142782. [PMID: 38972460 DOI: 10.1016/j.chemosphere.2024.142782] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2024] [Revised: 07/03/2024] [Accepted: 07/04/2024] [Indexed: 07/09/2024]
Abstract
Studies on the efficacies of vermicomposting and composting in countering the toxic impacts of pollutant cocktails in municipal solid waste (MSW) are scarce. Moreover, further research is needed to explore earthworms' remediation preferences for various pollutants in heterogeneous vermicomposting feedstocks, such as MSW. Therefore, removal dynamics of pesticides (chlorpyrifos, cypermethrin, and carbofuran), pharmaceuticals (diclofenac and carbamazepine), and heavy metals (Pb, Zn, Cu, and Mn) in MSW-based vermicomposting (Eisenia fetida and Eudrilus eugeniae) and composting systems were evaluated through multivariate analytical techniques (principal component (PCA) and multi-factor (MFA)) on the R-platform. Both earthworms satisfactorily increased their population and augmented NPK (nitrogen, phosphorous, and potassium) availability, cation exchange, microbial biomass C&N, and their metabolic activity 2-3 folds more than composting, accompanied by a 3-4 folds reduction of organic C, pH, and bulk density. Correspondingly, heavy metals, pesticides, and pharmaceuticals decreased by 8-10-folds via earthworm's significant pollutant removal efficiencies that subsided MSW-driven ecological risks by 60-90%. PCA and MFA revealed that N, P, and K-availability, organic C, and microbial activity were the indicative attributes for heavy metal and emerging organic micropollutant (EOMP)-removal during biocomposting; however, earthworms remove pesticides faster than pharmaceuticals and heavy metals. PCA-based novel empirical models demonstrated that in MSW-only feedstock, earthworm-mediated pollutant detoxification followed the order of pesticides > pharmaceuticals > heavy metals. However, in MSW combined with cow dung (1:1 ratio) feedstock, the detoxification order shifted to pharmaceuticals > heavy metals > pesticides. Therefore, this study provides fresh insights into pollutant-focused feedstock optimization for vermicomposting through model-based approaches, advancing the eco-friendly valorization of toxic MSW.
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Affiliation(s)
- Ratul Pegu
- Soil and Agro Bio-engineering Laboratory, Department of Environmental Science, Tezpur Central University, Napam, Tezpur - 784028, Assam, India
| | - Amit Prakash
- Environmental Modeling Laboratory, Department of Environmental Science, Tezpur Central University, Napam, Tezpur - 784028, Assam, India
| | - Preyashi Borah
- Soil and Agro Bio-engineering Laboratory, Department of Environmental Science, Tezpur Central University, Napam, Tezpur - 784028, Assam, India
| | - Sarmistha Paul
- Soil and Agro Bio-engineering Laboratory, Department of Environmental Science, Tezpur Central University, Napam, Tezpur - 784028, Assam, India; Mycology and Plant Pathology Laboratory, Department of Botany, Visva Bharati University, Santiniketan, Bolpur, Birbhum, West Bengal - 731235, India
| | - Satya Sundar Bhattacharya
- Soil and Agro Bio-engineering Laboratory, Department of Environmental Science, Tezpur Central University, Napam, Tezpur - 784028, Assam, India.
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3
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Sayın B, Kaban G. Biotechnological Innovations Unleashing the Potential of Olive Mill Wastewater in Added-Value Bioproducts. Foods 2024; 13:2245. [PMID: 39063329 PMCID: PMC11276412 DOI: 10.3390/foods13142245] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2024] [Revised: 07/07/2024] [Accepted: 07/13/2024] [Indexed: 07/28/2024] Open
Abstract
Byproducts and wastes from the food processing industry represent an important group of wastes generated annually in large quantities. It is important to note that the amount of this waste will increase with industrialization, and effective solutions must be found urgently. Many wastes that cause environmental pollution are evaluated by their low-tech conversion into products with little economic value, such as animal feed and fertilizer. Therefore, the evaluation of food processing waste using effective recycling techniques has become an interesting subject with increasing population, ongoing biotechnological studies, and advances in technology. The conversion of food waste into biotechnological products via fermentation is a sustainable, environmentally friendly, and economical method in line with the principles of green chemistry. This approach promotes the reuse of food waste by supporting the principles of a circular economy and offers sustainable alternatives to fossil fuels and synthetic chemicals. This contributes to reducing the carbon footprint, preserving soil and water quality, and providing economic sustainability through the production of high-value products. In this study, the properties of olive mill wastewater, an important and valuable waste in the olive oil industry, its environmental aspects, and its use in biotechnological applications that integrate green chemistry are evaluated.
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Affiliation(s)
- Bilge Sayın
- Department of Gastronomy and Culinary Arts, School of Tourism and Hotel Management, Ardahan University, 75002 Ardahan, Türkiye
| | - Güzin Kaban
- Department of Food Engineering, Faculty of Agriculture, Atatürk University, 25240 Erzurum, Türkiye
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Abboud S, Ouni A, Ben Abdallah RA, Bchir A, Ben Abdelwaheb S, Tlili D, Dbara S. Unraveling the effect of phenolic extract derived from olive mill solid wastes on agro-physiological and biochemical traits of pomegranate and its associated rhizospheric soil properties. JOURNAL OF HAZARDOUS MATERIALS 2024; 470:134234. [PMID: 38608584 DOI: 10.1016/j.jhazmat.2024.134234] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2023] [Revised: 04/04/2024] [Accepted: 04/06/2024] [Indexed: 04/14/2024]
Abstract
Agricultural waste management poses a significant challenge in circular economy strategies. Olive mill wastes (OMW) contain valuable biomolecules, especially phenolic compounds, with significant agricultural potential. Our study evaluate the effects of phenolic extract (PE) derived from olive mill solid wastes (OMSW) on pomegranate agro-physiological and biochemical responses, as well as soil-related attributes. Pomegranate plants were treated with PE at doses of 100 ppm and 200 ppm via foliar spray (L100 and L200) and soil application (S100 and S200). Results showed increased biomass with PE treatments, especially with soil application (S100 and S200). Proline and soluble sugar accumulation in leaves suggested plant adaptation to PE with low-level stress. Additionally, PE application reduced malondialdehyde (MDA) and hydrogen peroxide (H2O2) contents. Higher doses of PE (S200) significantly improved net photosynthesis (Pn), transpiration rate (E), water use efficiency (WUEi), and photosynthetic efficiency (fv/fm and PIabs). Furthermore, PE treatments enhanced levels of chlorophylls, carotenoids, polyphenols, flavonoids, and antioxidant activity. Soil application of PE also increased soil enzyme activities and microbial population. Our findings suggest the beneficial impact of PE application on pomegranate agro-physiological responses, laying the groundwork for further research across various plant species and soil types to introduce nutrient-enriched PE as an eco-friendly biostimulant.
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Affiliation(s)
- Samia Abboud
- Regional Research Centre on Horticulture and Organic Agriculture, IRESA-University of Sousse, Chott mariem-Sousse, Tunisia; LR16IO02 Laboratory of sustainability of olive and fruit growing in semi-arid and arid environments, Olive Tree Institute, University of Sfax, Tunisia.
| | - Azhar Ouni
- Regional Research Centre on Horticulture and Organic Agriculture, IRESA-University of Sousse, Chott mariem-Sousse, Tunisia
| | - Rania Aydi Ben Abdallah
- LR21AGR03-Production and Protection for a Sustainable Horticulture (2PHD), Regional Research Centre on Horticulture and Organic Agriculture, IRESA-University of Sousse, Chott mariem-Sousse, Tunisia
| | | | - Sahar Ben Abdelwaheb
- Regional Research Centre on Horticulture and Organic Agriculture, IRESA-University of Sousse, Chott mariem-Sousse, Tunisia
| | - Darine Tlili
- Regional Research Centre on Horticulture and Organic Agriculture, IRESA-University of Sousse, Chott mariem-Sousse, Tunisia
| | - Soumaya Dbara
- Regional Research Centre on Horticulture and Organic Agriculture, IRESA-University of Sousse, Chott mariem-Sousse, Tunisia; LR16IO02 Laboratory of sustainability of olive and fruit growing in semi-arid and arid environments, Olive Tree Institute, University of Sfax, Tunisia
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5
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Lei P, Lü J, Yao T, Zhang P, Chai X, Wang Y, Jiang M. Verbascoside exerts an anti-atherosclerotic effect by regulating liver glycerophospholipid metabolism. FOOD SCIENCE AND HUMAN WELLNESS 2023. [DOI: 10.1016/j.fshw.2023.03.035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/08/2023]
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6
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Carmona I, Aguirre I, Griffith DM, García-Borrego A. Towards a circular economy in virgin olive oil production: Valorization of the olive mill waste (OMW) "alpeorujo" through polyphenol recovery with natural deep eutectic solvents (NADESs) and vermicomposting. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 872:162198. [PMID: 36791855 DOI: 10.1016/j.scitotenv.2023.162198] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2022] [Revised: 02/08/2023] [Accepted: 02/08/2023] [Indexed: 06/18/2023]
Abstract
Virgin olive oil (VOO) production generates large amounts of a harmful by-product, olive mill waste (OMW) or alpeorujo, which has a strong environmental impact and that must be recycled to adapt VOO production to a circular economy model. Here, the valorization of OMW was studied by considering three consecutive stages: Stage 1 involves the generation of OMW; Stage 2 the recovery of bioactive phenolic compounds from the fresh OMW using natural deep eutectic solvents (NADESs), generating a valuable phenolic extract and a new by-product, a dephenolized OMW named "alpeoNADES"; and Stage 3 involves vermicomposting alpeoNADES with Eisenia fetida earthworms. Six NADES were formulated and tested, selecting a NADES composed of citric acid and fructose (CF) derived from food grade and biodegradable substances. CF was the most effective solvent to obtain phenolic extracts for nutraceutical and agronomical purposes, extracting 3988.74 mg/kg of polyphenols from fresh OMW. This alpeoNADES is a non-palatable substrate for E. fetida earthworms, as the residual CF gives it an acidic pH (pH 2). Its palatability was improved by mixing it with horse manure and straw for vermicomposting, in a 1:1 and 3:1 dry weight ratio. When these substrates were precomposted for 3 weeks they reached pH 5.5-6 and they could then be vermicomposted for 23 weeks (using OMW as a control). The best substrate for vermicomposting was determined by the worm biomass, growth rate, carbon to nitrogen (C:N) ratio, and N and P content. AlpeoNADES and manure 3:1 produced the highest quality vermicompost in the shortest time, generating a product that complied with European standards for organic fertilizers. Hence, alpeoNADES was recycled to a low-cost, organic balanced fertilizer in Stage 3, enabling the olive oil industry to transition to sustainable production through this integrated circular economy design.
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Affiliation(s)
- Inmaculada Carmona
- EcoSs_Lab, Departamento de Ciencias Biológicas y Agropecuarias, Universidad Técnica Particular de Loja, 1101608 Loja, Ecuador; Department of Agronomy, Universidad de Sevilla, Seville, Spain
| | - Itziar Aguirre
- Department of Agronomy, Universidad de Sevilla, Seville, Spain
| | - Daniel M Griffith
- EcoSs_Lab, Departamento de Ciencias Biológicas y Agropecuarias, Universidad Técnica Particular de Loja, 1101608 Loja, Ecuador
| | - Aranzazu García-Borrego
- Department of Food Phytochemicals, Instituto de la Grasa, Spanish National Research Council (CSIC), Seville, Spain.
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Sun J, Wang F, Jia X, Wang X, Xiao X, Dong H. Research progress of bio-slurry remediation technology for organic contaminated soil. RSC Adv 2023; 13:9903-9917. [PMID: 37034448 PMCID: PMC10076817 DOI: 10.1039/d2ra06106f] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Accepted: 03/13/2023] [Indexed: 04/11/2023] Open
Abstract
Bio-slurry remediation technology, as a controllable bioremediation method, has the significant advantage of high remediation efficiency and can effectively solve the problems of high energy consumption and secondary pollution of traditional organic pollution site remediation technology. To further promote the application of this technology in the remediation of organically polluted soil, this paper summarizes the importance and advantages of bio-slurry remediation technology compared with traditional soil remediation technologies (physical, chemical, and biological). It introduces the technical infrastructure and its technological processes. Then, various factors that may affect its remediation performance are discussed. By analyzing the applications of this technology to the remediation of typical organic pollutant-(polycyclic aromatic hydrocarbons(PAHs), polychlorinated biphenyls(PCBs), total petroleum hydrocarbons(TPH), and pesticide) contaminated sites, the following key features of this remediation technology are summarised: (1) the technology has a wide range of applications and can be used in a versatile way in the remediation projects of various types of organic-contaminated soil sites such as in clay, sand, and high organic matter content soil; (2) the technology is highly controllable. Adjusting environmental parameters and operational conditions, such as nutrients, organic carbon sources (bio-stimulation), inoculants (bio-augmentation), water-to-soil ratio, etc., can control the remediation process, thus improving the restoration performance. To sum up, this bio-slurry remediation technology is an efficient, controllable and green soil remediation technology that has broad application prospects.
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Affiliation(s)
- Jing Sun
- Environmental Science and Engineering, Qilu University of Technology Jinan 250353 China
| | - Fujia Wang
- Environmental Science and Engineering, Qilu University of Technology Jinan 250353 China
- Environmental Testing and Experiment Center, Chinese Research Academy of Environmental Sciences Beijing 100012 China
| | - Xiaohan Jia
- Environmental Testing and Experiment Center, Chinese Research Academy of Environmental Sciences Beijing 100012 China
| | - Xiaowei Wang
- Environmental Testing and Experiment Center, Chinese Research Academy of Environmental Sciences Beijing 100012 China
| | - Xinxin Xiao
- Environmental Testing and Experiment Center, Chinese Research Academy of Environmental Sciences Beijing 100012 China
| | - Huaijin Dong
- Environmental Testing and Experiment Center, Chinese Research Academy of Environmental Sciences Beijing 100012 China
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Thirunavukkarasu A, Sivashankar R, Nithya R, Sathya AB, Priyadharshini V, Kumar BP, Muthuveni M, Krishnamoorthy S. Sustainable organic waste management using vermicomposting: a critical review on the prevailing research gaps and opportunities. ENVIRONMENTAL SCIENCE. PROCESSES & IMPACTS 2023; 25:364-381. [PMID: 36744572 DOI: 10.1039/d2em00324d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Logistic growth of human population, exponential rate in agronomic industries and feeble waste management practices have resulted in the massive generation of organic wastes. Vermicomposting is one of the eco-biotechnological practices to efficiently transform them into stable and nutrient-rich organic manure with the synergetic actions of earthworms and soil microbiota. Vermicompost, a derivative product has the desirable physicochemical traits such as excellent porosity, buffering actions, aeration and water holding capacity. Also the presences of enzymic and microbial secretions contribute to growth and disease resistance of the crops. Owing to the benefits of soil nutrients restoration and effective organic waste management, vermicomposting has gained much attention among the scientific researchers and organic farmers. The present review is intended to provide comprehensive information on the site selection, screening of earthworms, different modes of operation and their desirable micro-environmental conditions. Also, the review has critically identified the prevailing research gaps viz. limited studies on the substrate formulation or optimization designs, poor control on the operational variables, lack of field-level investigations, technological feasibility of scale-up process, economic viability and cost-benefit analysis. Prospective researches can be made on these hotspots to identify the vermicomposting as a successful and profitable business model in the circular economy.
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Affiliation(s)
| | - Raja Sivashankar
- Department of Chemical Engineering, National Institute of Technology, Warangal, India
| | - Rajarathinam Nithya
- Department of Industrial Biotechnology, Government College of Technology, Coimbatore, India.
| | | | | | - Balakrishnan Prem Kumar
- Department of Industrial Biotechnology, Government College of Technology, Coimbatore, India.
| | - Murugan Muthuveni
- Department of Industrial Biotechnology, Government College of Technology, Coimbatore, India.
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9
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Trigui S, Hackenberger DK, Stjepanović N, Lončarić Ž, Kovačević M, Hackenberger BK, Kallel A. Mitigation of OMW toxicity toward Enchytraeus albidus with application of additives. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:83426-83436. [PMID: 35761138 DOI: 10.1007/s11356-022-21668-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/03/2022] [Accepted: 06/21/2022] [Indexed: 06/15/2023]
Abstract
The olive oil industry generates considerable amounts of olive mill wastewater (OMW) which is treated and used in agriculture, energy production, or discharged into evaporating ponds where OMW contaminated soil (OMWS) is formed. Due to the extremely high phenol content, untreated OMWS is not suitable for plants and soil organisms. This study aimed to determine the adverse effects of OMWS on Enchytraeus albidus and whether the addition of clay and diatomaceous earth can reduce these effects. Without additives, reproduction was reduced up to 35%, with high number of unhatched cocoons, indicated hatching impairment. Furthermore, acetylcholinesterase (AChE) activity decreased significantly at the highest OMWS ratio (40%), as did glutathione-S-transferase (GST) activity at two ratios (40%), indicating neurotoxic effects and oxidative stress. The application of additives (clay and diatomaceous earth) decreased phenol concentration up to 35 and 45%, respectively. Consequently, the number of juveniles increased significantly compared to the control and AChE and GST activities were not affected. However, an increased number of unhatched cocoons and lipid peroxidation were observed after diatomaceous earth treatment, indicating the occurrence of stress. Although additives can bind phenols, neutralize harmful effects and allow the use of OMWS as a fertilizer in agriculture, they should be carefully selected taking into account soil organisms as well. The use of additives to reduce the adverse effects of OMWS can be a turning point in the remediation of olive contaminated soil.
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Affiliation(s)
- Salsabil Trigui
- Laboratory of Water, Energy and Environment (Lab 3E), Sfax National School of Engineers, University of Sfax, Sfax, Tunisia
| | - Davorka K Hackenberger
- Department of Biology, University of Osijek, Cara Hadrijana 8A, HR-31000, Osijek, Croatia
| | - Nikolina Stjepanović
- Department of Biology, University of Osijek, Cara Hadrijana 8A, HR-31000, Osijek, Croatia
| | - Željka Lončarić
- Department of Biology, University of Osijek, Cara Hadrijana 8A, HR-31000, Osijek, Croatia
| | - Marija Kovačević
- Department of Biology, University of Osijek, Cara Hadrijana 8A, HR-31000, Osijek, Croatia
| | | | - Amjad Kallel
- Laboratory of Water, Energy and Environment (Lab 3E), Sfax National School of Engineers, University of Sfax, Sfax, Tunisia
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10
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Rupani PF, Embrandiri A, Rezania S, Wang S, Shao W, Domínguez J, Appels L. Changes in the microbiota during biological treatment of palm oil mill waste: A critical review. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 320:115772. [PMID: 35944317 DOI: 10.1016/j.jenvman.2022.115772] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2022] [Revised: 07/05/2022] [Accepted: 07/14/2022] [Indexed: 06/15/2023]
Abstract
Palm oil mill waste has a complex cellulosic structure, is rich in nutrients, and provides a habitat for diverse microbial communities. Current research focuses on how the microbiota and organic components interact during the degradation of this type of waste. Some recent studies have described the microbial communities present in different biodegradation processes of palm oil mill waste, identifying the dominant bacteria/fungi responsible for breaking down the cellulosic components. However, understanding the degradation process's mechanisms is vital to eliminating the need for further pretreatment of lignocellulosic compounds in the waste mixture and facilitating the commercialization of palm oil mill waste treatment technology. Thus, the present work aims to review microbial community dynamics via three biological treatment systems comprehensively: composting, vermicomposting, and dark fermentation, to understand how inspiration from nature can further enhance existing degradation processes. The information presented could be used as an umbrella to current research on biological treatment processes and specific research on the bioaugmentation of indigenous microbial consortia isolated during the biological degradation of palm oil mill waste.
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Affiliation(s)
- Parveen Fatemeh Rupani
- KU Leuven, Department of Chemical Engineering, Process and Environmental Technology Lab, Jan Pieter De Nayerlaan 5, B-2860 Sint-Katelijne-Waver, Belgium.
| | - Asha Embrandiri
- Department of Environmental Health, Wollo University, Dessie, 1145, Amhara, Ethiopia.
| | - Shahabaldin Rezania
- Department of Environment and Energy, Sejong University, Seoul, 05006, South Korea.
| | - Shuang Wang
- School of Energy and Power Engineering, Jiangsu University, Zhenjiang, 212013, Jiangsu, PR China.
| | - Weilan Shao
- Biofuels Institute, School of Environment and Safety Engineering, Jiangsu University, Zhenjiang, 212013, Jiangsu, PR China.
| | - Jorge Domínguez
- Grupo de Ecoloxía Animal (GEA), Universidade de Vigo, 36310, Vigo, Spain.
| | - Lise Appels
- KU Leuven, Department of Chemical Engineering, Process and Environmental Technology Lab, Jan Pieter De Nayerlaan 5, B-2860 Sint-Katelijne-Waver, Belgium.
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11
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Wang Q, Guo S, Ali M, Song X, Tang Z, Zhang Z, Zhang M, Luo Y. Thermally enhanced bioremediation: A review of the fundamentals and applications in soil and groundwater remediation. JOURNAL OF HAZARDOUS MATERIALS 2022; 433:128749. [PMID: 35364527 DOI: 10.1016/j.jhazmat.2022.128749] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2022] [Revised: 03/11/2022] [Accepted: 03/18/2022] [Indexed: 06/14/2023]
Abstract
Thermally enhanced bioremediation (TEB), a new concept proposed in recent years, explores the combination of thermal treatment and bioremediation to address the challenges of the low efficiency and long duration of bioremediation. This study presented a comprehensive review regarding the fundamentals of TEB and its applications in soil and groundwater remediation. The temperature effects on the bioremediation of contaminants were systematically reviewed. The thermal effects on the physical, chemical and biological characteristics of soil, and the corresponding changes of contaminants bioavailability and microbial metabolic activities were summarized. Specifically, the increase in temperature within a suitable range can proliferate enzymes enrichment, extracellular polysaccharides and biosurfactants production, and further enhancing bioremediation. Furthermore, a systematic evaluation of TEB applications by utilizing traditional in situ heating technologies, as well as renewable energy (e.g., stored aquifer thermal energy and solar energy), was provided. Additionally, TEB has been applied as a biological polishing technology post thermal treatment, which can be a cost-effective method to address the contaminants rebounds in groundwater remediation. However, there are still various challenges to be addressed in TEB, and future research perspectives to further improve the basic understanding and applications of TEB for the remediation of contaminated soil and groundwater are presented.
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Affiliation(s)
- Qing Wang
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
| | - Siwei Guo
- Zhejiang University, Hangzhou, China
| | - Mukhtiar Ali
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xin Song
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China; University of Chinese Academy of Sciences, Beijing 100049, China.
| | - Zhiwen Tang
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Zhuanxia Zhang
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Meng Zhang
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
| | - Yongming Luo
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China; University of Chinese Academy of Sciences, Beijing 100049, China
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12
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Trigui S, Hackenberger DK, Kovačević M, Stjepanović N, Palijan G, Kallel A, Hackenberger BK. Effects of olive mill waste (OMW) contaminated soil on biochemical biomarkers and reproduction of Dendrobaena veneta. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:24956-24967. [PMID: 34837620 DOI: 10.1007/s11356-021-17593-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Accepted: 11/14/2021] [Indexed: 06/13/2023]
Abstract
Olive oil industry is economically important in Mediterranean countries. Disposal of olive mill waste (OMW) presents an environmental concern in those countries due to its high salinity and its high level of polyphenols. In order to reuse OMW, those properties have to change either through the filtration process and addition of adsorbents or by composting. One of the most important organisms in composting of organic wastes is earthworms. However, data on the effects of OMW on earthworms are scarce. The main aim of our study was to investigate whether OMW contaminated soil (OMW CS) causes adverse effects on molecular and organism level in epigeic earthworm Dendrobaena veneta and on microbiological activity. Changes of measured biochemical biomarkers (AChE, CAT, GST, lipids, MDA) varied depending on the quantity of added OMW CS and the exposure duration. Oxidative stress occurred after 7 days of exposure, while in most cases enzyme activity recovered after 28 days. At the highest ratio of contaminated soil (50%), reproduction was completely inhibited. The second aim was to investigate the impact of earthworms on phenol degradation and microbial activity, indicating an important role in the bioremediation of contaminated soils. Our results show that above a certain quantity an OMW CS has an adverse effect on earthworms, while the impact of earthworms on soil microbial activity was positive but transient. Yet, as the results also imply that earthworms have an impact on phenol degradation, they can be used to help remediation of OMW CS and its subsequent usage in agriculture. However, the quantity of OMW CS that can be safely added should be determined first.
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Affiliation(s)
- Salsabil Trigui
- Laboratory of Water, Energy and Environment (Lab 3E), Sfax National School of Engineers, University of Sfax, Sfax, Tunisia
| | | | - Marija Kovačević
- Department of Biology, University of Osijek, Cara Hadrijana 8A, 31000, Osijek, Croatia
| | - Nikolina Stjepanović
- Department of Biology, University of Osijek, Cara Hadrijana 8A, 31000, Osijek, Croatia
| | - Goran Palijan
- Department of Biology, University of Osijek, Cara Hadrijana 8A, 31000, Osijek, Croatia
| | - Amjad Kallel
- Laboratory of Water, Energy and Environment (Lab 3E), Sfax National School of Engineers, University of Sfax, Sfax, Tunisia
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Fernández-Rodríguez MJ, de la Lama-Calvente D, García-González M, Moreno-Fernández J, Jiménez-Rodríguez A, Borja R, Rincón-Llorente B. Integral Valorization of Two-Phase Olive Mill Solid Waste (OMSW) and Related Washing Waters by Anaerobic Co-digestion of OMSW and the Microalga Raphidocelis subcapitata Cultivated in These Effluents. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2022; 70:3219-3227. [PMID: 35254817 PMCID: PMC8931757 DOI: 10.1021/acs.jafc.1c08100] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
This study evaluates the comprehensive valorization of the byproducts derived from the two-phase olive oil elaboration process [i.e., olive washing water (OWW), olive oil washing water (OOWW), and olive mill solid waste (OMSW)] in a closed-loop process. Initially, the microalga Raphidocelis subcapitata was grown using a mixture of OWW and OOWW as the culture medium, allowing phosphate, nitrate, sugars, and soluble chemical oxygen demand removal. In a second step, the microalgal biomass grown in the mixture of washing waters was used as a co-substrate together with OMSW for an anaerobic co-digestion process. The anaerobic co-digestion of the combination of 75% OMSW-25% R. subcapitata enhanced the methane yield by 7.0 and 64.5% compared to the anaerobic digestion of the OMSW and R. subcapitata individually. This schedule of operation allowed for integration of all of the byproducts generated from the two-phase olive oil elaboration process in a full valorization system and the establishment of a circular economy concept for the olive oil industry.
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Affiliation(s)
- María José Fernández-Rodríguez
- Instituto de la Grasa, Consejo Superior de Investigaciones Científicas (CSIC), Campus Universidad Pablo de Olavide, Edificio 46, Carretera de Utrera, km 1, 41013 Sevilla, Spain
- Departamento de Sistemas Físico, Químicos y Naturales, Universidad Pablo de Olavide, Carretera de Utrera, km 1, 41013 Sevilla, Spain
| | - David de la Lama-Calvente
- Instituto de la Grasa, Consejo Superior de Investigaciones Científicas (CSIC), Campus Universidad Pablo de Olavide, Edificio 46, Carretera de Utrera, km 1, 41013 Sevilla, Spain
| | - Mercedes García-González
- Instituto de Bioquímica Vegetal y Fotosíntesis (IBVF), Centro de Investigaciones Científicas Isla de la Cartuja, Universidad de Sevilla-Consejo Superior de Investigaciones Científicas (CSIC), Avenida Américo Vespucio 49, 41092 Sevilla, Spain
| | - José Moreno-Fernández
- Instituto de Bioquímica Vegetal y Fotosíntesis (IBVF), Centro de Investigaciones Científicas Isla de la Cartuja, Universidad de Sevilla-Consejo Superior de Investigaciones Científicas (CSIC), Avenida Américo Vespucio 49, 41092 Sevilla, Spain
| | - Antonia Jiménez-Rodríguez
- Departamento de Sistemas Físico, Químicos y Naturales, Universidad Pablo de Olavide, Carretera de Utrera, km 1, 41013 Sevilla, Spain
| | - Rafael Borja
- Instituto de la Grasa, Consejo Superior de Investigaciones Científicas (CSIC), Campus Universidad Pablo de Olavide, Edificio 46, Carretera de Utrera, km 1, 41013 Sevilla, Spain
| | - Bárbara Rincón-Llorente
- Instituto de la Grasa, Consejo Superior de Investigaciones Científicas (CSIC), Campus Universidad Pablo de Olavide, Edificio 46, Carretera de Utrera, km 1, 41013 Sevilla, Spain
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14
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Bouhia Y, Hafidi M, Ouhdouch Y, El Boukhari MEM, El Fels L, Zeroual Y, Lyamlouli K. Microbial Community Succession and Organic Pollutants Removal During Olive Mill Waste Sludge and Green Waste Co-composting. Front Microbiol 2022; 12:814553. [PMID: 35265049 PMCID: PMC8899611 DOI: 10.3389/fmicb.2021.814553] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2021] [Accepted: 12/29/2021] [Indexed: 11/13/2022] Open
Abstract
Olive mill wastewater sludge (OMWS) is the main by-product of the olive industry. OMWS is usually dumped in landfills without prior treatment and may cause several eco-environmental hazards due to its high toxicity, which is mainly attributed to polyphenols and lipids. OMWS is rich in valuable biocompounds, which makes it highly desirable for valorization by composting. However, there is a need to understand how microbial communities evolve during OMWS composting with respect to physicochemical changes and the dynamics of pollutant degradation. In this study, we addressed the relationship between microbial community, physicochemical variations and pollutants degradation during the co-composting of OMWS and green wastes using metagenomic- and culture-dependent approaches. The results showed that in raw OMWS, Pichia was the most represented genus with almost 53% of the total identified fungal population. Moreover, the bacteria that dominated were Zymobacter palmae (20%) and Pseudomonas sp. (19%). The addition of green waste to OMWS improved the actinobacterial diversity of the mixture and enhanced the degradation of lipids (81.3%) and polyphenols (84.54%). Correlation analysis revealed that Actinobacteria and fungi (Candida sp., Galactomyces sp., and Pichia manshurica) were the microorganisms that had the greatest influence on the composting process. Overall, these findings provide for the first time some novel insights into the microbial dynamics during OMWS composting and may contribute to the development of tailored inoculum for process optimization.
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Affiliation(s)
- Youness Bouhia
- Laboratory of Microbial Biotechnology, Agrosciences and Environment, Labelled Research Unit-CNRST N°4, Faculty of Sciences Semlalia, Cadi Ayyad University, Marrakesh, Morocco.,Biodiversity and Plant Sciences Program, AgroBioSciences Department, Mohammed VI Polytechnic University (UM6P), Benguerir, Morocco
| | - Mohamed Hafidi
- Laboratory of Microbial Biotechnology, Agrosciences and Environment, Labelled Research Unit-CNRST N°4, Faculty of Sciences Semlalia, Cadi Ayyad University, Marrakesh, Morocco.,Biodiversity and Plant Sciences Program, AgroBioSciences Department, Mohammed VI Polytechnic University (UM6P), Benguerir, Morocco
| | - Yedir Ouhdouch
- Laboratory of Microbial Biotechnology, Agrosciences and Environment, Labelled Research Unit-CNRST N°4, Faculty of Sciences Semlalia, Cadi Ayyad University, Marrakesh, Morocco.,Biodiversity and Plant Sciences Program, AgroBioSciences Department, Mohammed VI Polytechnic University (UM6P), Benguerir, Morocco
| | - Mohammed El Mehdi El Boukhari
- Laboratory of Microbial Biotechnology, Agrosciences and Environment, Labelled Research Unit-CNRST N°4, Faculty of Sciences Semlalia, Cadi Ayyad University, Marrakesh, Morocco.,Biodiversity and Plant Sciences Program, AgroBioSciences Department, Mohammed VI Polytechnic University (UM6P), Benguerir, Morocco
| | - Loubna El Fels
- Laboratory of Microbial Biotechnology, Agrosciences and Environment, Labelled Research Unit-CNRST N°4, Faculty of Sciences Semlalia, Cadi Ayyad University, Marrakesh, Morocco
| | | | - Karim Lyamlouli
- Biodiversity and Plant Sciences Program, AgroBioSciences Department, Mohammed VI Polytechnic University (UM6P), Benguerir, Morocco
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15
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Roy S, Sarkar D, Datta R, Bhattacharya SS, Bhattacharyya P. Assessing the arsenic-saturated biochar recycling potential of vermitechnology: Insights on nutrient recovery, metal benignity, and microbial activity. CHEMOSPHERE 2022; 286:131660. [PMID: 34315078 DOI: 10.1016/j.chemosphere.2021.131660] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Revised: 07/11/2021] [Accepted: 07/22/2021] [Indexed: 06/13/2023]
Abstract
Biochar mediated pollutant removal is gaining attention because of high efficiency of the process. However, effective recycling avenues of the pollutant-saturated biochars are scarce in the knowledge base; while such materials can be a new source of long-range contamination. Therefore, potential of vermitechnology for eco-friendly recycling of pollutant-loaded biochar was assessed by using arsenic-saturated native (NBC) and exfoliated (EBC) biochars as feedstocks for the first time. Interestingly, the bioavailable arsenic fractions (water soluble and exchangeable) considerably reduced by 22-44 % with concurrent increment (~8-15 %) of the recalcitrant (residual and organic bound) fractions in the biochar-based feedstocks. Consequently, ~2-3 folds removal of the total arsenic was achieved through vermicomposting. The earthworm population growth (2.5-3 folds) was also highly satisfactory in the biochar-based feedstocks. The results clearly imply that Eisenia fetida could compensate the arsenic-induced stress to microbial population and greatly augmented microbial biomass, respiration and enzyme activity by 3-12 folds. Moreover, biochar-induced alkalinity was significantly neutralized in the vermibeds, which remarkably balanced the TOC level and nutrient (N, P, and K) availability particularly in EBC + CD vermibeds. Overall, the nutrient recovery potential and arsenic removal efficiency of vermitechnology was clearly exhibited in NBC/EBC + CD (12.5:87.5) feedstocks. Hence, it is abundantly clear that vermitechnology can be a suitable option for eco-friendly recycling of pollutant-saturated sorbing agents, like biochars.
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Affiliation(s)
- Shuvrodeb Roy
- Agricultural and Ecological Research Unit, Indian Statistical Institute, Giridih, Jharkhand, 815301, India
| | - Dibyendu Sarkar
- Stevens Institute of Technology, Department of Civil, Environmental, and Ocean Engineering, Hoboken, NJ, 07030, USA
| | - Rupali Datta
- Department of Biological Science, Michigan Technological University, Michigan, USA
| | - Satya Sundar Bhattacharya
- Soil and Agro-bioengineering Lab, Department of Environmental Science, Tezpur University, Tezpur, Assam, 784028, India.
| | - Pradip Bhattacharyya
- Agricultural and Ecological Research Unit, Indian Statistical Institute, Giridih, Jharkhand, 815301, India.
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16
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Tsigkou K, Terpou A, Treu L, Kougias PG, Kornaros M. Thermophilic anaerobic digestion of olive mill wastewater in an upflow packed bed reactor: Evaluation of 16S rRNA amplicon sequencing for microbial analysis. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 301:113853. [PMID: 34624575 DOI: 10.1016/j.jenvman.2021.113853] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2021] [Revised: 09/21/2021] [Accepted: 09/24/2021] [Indexed: 06/13/2023]
Abstract
Olive mill wastewater, a by-product of olive oil production after the operation of three-phase decanters, was used in a thermophilic anaerobic digester targeting efficient bioconversion of its organic load into biogas. An active anaerobic inoculum originating from a mesophilic reactor, was acclimatized under thermophilic conditions and was filled into a high-rate upflow packed bed reactor. Its performance was tested towards the treatment efficacy of olive mill wastewater under thermophilic conditions reaching the minimum hydraulic retention time of 4.2 d with promising results. As analysis of the microbial communities is considered to be the key for the development of anaerobic digestion optimization techniques, the present work focused on characterizing the microbial community and its variation during the reactor's runs, via 16S rRNA amplicon sequencing. Identification of new microbial species and taxonomic groups determination is of paramount importance as these representatives determine the bioprocess outcome. The current study results may contribute to further olive mill wastewater exploitation as a potential source for efficient biogas production.
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Affiliation(s)
- Konstantina Tsigkou
- Department of Chemical Engineering, University of Patras, 1 Karatheodori Str., University Campus, 26504, Patras, Greece
| | - Antonia Terpou
- Department of Agricultural Development, Agri-food, and Natural Resources Management, School of Agricultural Development, Nutrition & Sustainability, National and Kapodistrian University of Athens, GR-34400, Psachna, Greece
| | - Laura Treu
- Department of Biology, University of Padova, 35131, Padova, Italy
| | - Panagiotis G Kougias
- Soil and Water Resources Institute, Hellenic Agricultural Organisation DEMETER, 57001, Thermi, Thessaloniki, Greece
| | - Michael Kornaros
- Department of Chemical Engineering, University of Patras, 1 Karatheodori Str., University Campus, 26504, Patras, Greece.
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17
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Amoatey P, Izady A, Al-Maktoumi A, Chen M, Al-Harthy I, Al-Jabri K, Msagati TAM, Nkambule TTI, Baawain MS. A critical review of environmental and public health impacts from the activities of evaporation ponds. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 796:149065. [PMID: 34328881 DOI: 10.1016/j.scitotenv.2021.149065] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2021] [Revised: 07/11/2021] [Accepted: 07/12/2021] [Indexed: 06/13/2023]
Abstract
Evaporation ponds (EVPs) are among the most cost-effective, and simple wastewater treatment technologies used in many regions/countries with high solar radiation levels. However, its operational limitations, which include the overflow of wastewater, leakages via liners, and large surface area of the EVP that is exposed to atmosphere, creates a negative feedback to the environment. Therefore, the main aim of this review study of more than a hundred works published a little all over the continents is to provide a summary of various contaminations that are associated with EVPs activities through different environmental compartments. In addition, the impacts of EVP on fauna, human health including the current on-site sustainable mitigation strategies were also reviewed. The first conclusion from this study shows that the most commonly contaminants released into surface waters, groundwater, soil and sediments were heavy metals, pesticides, herbicides, selenium, including several major anions and cations. Non-methane hydrocarbons (NMHCs), volatile organic compounds (VOCs), and particulate matters (PMs) were the main air pollutants emitted from the surfaces of an EVP. Limited data is available about the emissions of atmospheric greenhouse gas (GHGs) especially carbon dioxide (CO2) and methane (CH4) from EVP surfaces. Migratory birds and aquatic organisms are the most vulnerable fauna as EVP wastewaters can cause obstruction of movements, affect diversity, and causes mortalities following the exposure to the toxic wastewater. The study revealed limited data about the potential health risk associated with occupational and environmental exposure to radiological hazards and contaminated drinking water from EVP activities. On-site EVP treatment strategies using bioremediation and electrochemical treatment technologies have shown to be a promising sustainable mitigation approach. Knowledge gaps in areas of GHGs monitoring/modeling, pollution exposure estimation and health risk assessments are urgently required to gain deeper understanding about the impact of EVP activities, and incorporate them into future EVP designs.
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Affiliation(s)
- Patrick Amoatey
- Department of Civil and Architectural Engineering, Sultan Qaboos University, Muscat, Oman
| | - Azizallah Izady
- Water Research Center, Sultan Qaboos University, Muscat, Oman.
| | - Ali Al-Maktoumi
- Water Research Center, Sultan Qaboos University, Muscat, Oman; Department of Soils, Water and Agricultural Engineering, Sultan Qaboos University, Muscat, Oman
| | - Mingjie Chen
- Water Research Center, Sultan Qaboos University, Muscat, Oman
| | - Issa Al-Harthy
- Department of Civil and Architectural Engineering, Sultan Qaboos University, Muscat, Oman
| | - Khalifa Al-Jabri
- Department of Civil and Architectural Engineering, Sultan Qaboos University, Muscat, Oman
| | - Titus A M Msagati
- Institute for Nanotechnology and Water Sustainability, College of Science, Eng. and Technology, University of South Africa, South Africa
| | - Thabo T I Nkambule
- Institute for Nanotechnology and Water Sustainability, College of Science, Eng. and Technology, University of South Africa, South Africa
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18
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Olive Mill and Olive Pomace Evaporation Pond’s By-Products: Toxic Level Determination and Role of Indigenous Microbiota in Toxicity Alleviation. APPLIED SCIENCES-BASEL 2021. [DOI: 10.3390/app11115131] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Diverse vegetable oils are extracted from oleagenic trees and plants all over the world. In particular, olive oil represents a strategic socio-economic branch in the Mediterranean countries. These countries use either two or three-phase olive oil extraction systems. In this work, we focus on the by-products from three-phase olive oil extraction, which are the liquid olive mill wastewater (OMW) and the solid olive mill pomace (OMP) rejected in evaporative ponds. The disposal of this recalcitrant waste poses environmental problems such as the death of different species of insects and animals. In-depth ICP-OES analysis of the heavy metal composition of OMW and OMP revealed the presence of many metals ranging from non-toxic to highly toxic. The LC-HRMS characterization of these by-products indicated the presence of several secondary metabolites harmful to humans or to the environment. Thus, we aimed to identify OMW and OMP indigenous microbiota through metagenomics. The bacterial population was dominated by the Acetobacter (49.7%), Gluconobacter (17.3%), Gortzia (13.7%) and Nardonalla (5.3%) genera. The most abundant fungal genera were Nakazawaea, Saccharomyces, Lachancea and Candida. These microbial genera are responsible for OMW, OMP and soil toxicity alleviation.
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19
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Singh AK, Bilal M, Iqbal HMN, Raj A. Trends in predictive biodegradation for sustainable mitigation of environmental pollutants: Recent progress and future outlook. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 770:144561. [PMID: 33736422 DOI: 10.1016/j.scitotenv.2020.144561] [Citation(s) in RCA: 58] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Revised: 12/13/2020] [Accepted: 12/13/2020] [Indexed: 02/05/2023]
Abstract
The feasibility of in-silico techniques, together with the computational framework, has been applied to predictive bioremediation aiming to clean-up contaminants, toxicity evaluation, and possibilities for the degradation of complex recalcitrant compounds. Emerging contaminants from different industries have posed a significant hazard to the environment and public health. Given current bioremediation strategies, it is often a failure or inadequate for sustainable mitigation of hazardous pollutants. However, clear-cut vital information about biodegradation is quite incomplete from a conventional remediation techniques perspective. Lacking complete information on bio-transformed compounds leads to seeking alternative methods. Only scarce information about the transformed products and toxicity profile is available in the published literature. To fulfill this literature gap, various computational or in-silico technologies have emerged as alternating techniques, which are being recognized as in-silico approaches for bioremediation. Molecular docking, molecular dynamics simulation, and biodegradation pathways predictions are the vital part of predictive biodegradation, including the Quantitative Structure-Activity Relationship (QSAR), Quantitative structure-biodegradation relationship (QSBR) model system. Furthermore, machine learning (ML), artificial neural network (ANN), genetic algorithm (GA) based programs offer simultaneous biodegradation prediction along with toxicity and environmental fate prediction. Herein, we spotlight the feasibility of in-silico remediation approaches for various persistent, recalcitrant contaminants while traditional bioremediation fails to mitigate such pollutants. Such could be addressed by exploiting described model systems and algorithm-based programs. Furthermore, recent advances in QSAR modeling, algorithm, and dedicated biodegradation prediction system have been summarized with unique attributes.
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Affiliation(s)
- Anil Kumar Singh
- Environmental Microbiology Laboratory, Environmental Toxicology Group, CSIR-Indian Institute of Toxicology Research (CSIR-IITR), Vishvigyan Bhawan, 31, Mahatma Gandhi Marg, Lucknow 226001, Uttar Pradesh, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Muhammad Bilal
- School of Life Science and Food Engineering, Huaiyin Institute of Technology, Huaian 223003, China
| | - Hafiz M N Iqbal
- Tecnologico de Monterrey, School of Engineering and Sciences, Monterrey 64849, Mexico.
| | - Abhay Raj
- Environmental Microbiology Laboratory, Environmental Toxicology Group, CSIR-Indian Institute of Toxicology Research (CSIR-IITR), Vishvigyan Bhawan, 31, Mahatma Gandhi Marg, Lucknow 226001, Uttar Pradesh, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India.
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20
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Wang Z, Chen Z, Niu Y, Ren P, Hao M. Feasibility of vermicomposting for spent drilling fluid from a nature-gas industry employing earthworms Eisenia fetida. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2021; 214:111994. [PMID: 33711576 DOI: 10.1016/j.ecoenv.2021.111994] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2020] [Revised: 01/24/2021] [Accepted: 01/26/2021] [Indexed: 06/12/2023]
Abstract
This study investigated the vermicomposting of spent drilling fluid (SDF) from the nature-gas industry mixed with cow dung in 0% (T1), 20% (T2), 30% (T3), 40% (T4), 50% (T5), and 60% (T6) ratio employing Eisenia fetida under a 6 weeks trial. Eisenia. fetida showed better growth and reproduction performances in the first three vermireactors (T1-T3), and the mortality was higher in the vermireactors that contained more spent drilling fluid (≥40%). Vermicomposting results in a decrease in total organic carbon, C/N ratio, and an increase in EC, total nitrogen, total phosphorous, total potassium compared to their initial values. The RadViz and VizRank showed that vermicomposting results in a greater impact on the C/N ratio (15.24-35.48%) and EC (7.29-26.45%) compared to other parameters. Activities of urease and alkaline phosphatase during vermicomposting initially increased and then declined suggesting vermicompost maturity. Also, seed germination, mitotic index and chromosomal abnormality assays using cowpea signified that the vermicomposts T2 is suitable for agricultural use due to the lower phytotoxicity and cytotoxicity. The results indicated that SDF could be converted into good quality manure by vermicomposting if mixed up to 20% with cow dung.
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Affiliation(s)
- Zhe Wang
- Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, 712100 Shaanxi, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Zhikun Chen
- Key Laboratory of Soil Resource & Biotech Application, Shaanxi Academy of Sciences, Xi'an Botanical Garden of Shaanxi Province, Institute of Botany of Shaanxi Province, Xi'an 710061, China
| | - Yuhua Niu
- College of Chemistry and Chemical Engineering, Shaanxi University of Science & Technology, Xi'an 710021, Shaanxi, China
| | - Peng Ren
- Research Institute of Oil and Gas Technology, PetroChina Changqing Oilfield Branch, Xi'an 710200, Shaanxi, China
| | - Mingde Hao
- Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, 712100 Shaanxi, China; University of Chinese Academy of Sciences, Beijing 100049, China.
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21
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Multi-Response Optimization of Coagulation and Flocculation of Olive Mill Wastewater: Statistical Approach. APPLIED SCIENCES-BASEL 2021. [DOI: 10.3390/app11052344] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Olive oil production is one of the important industrial sectors within the agro-food framework of the Mediterranean region, economically important to the people working in this sector, although there is also a threat to the environment due to residues. The main wastes of the olive oil extraction process are olive mill wastewater (OMW) and olive husks which also require proper treatment before dismissal. In this research work, the main goal is to introduce grey relational analysis, a technique for multi-response optimization, to the coagulation and flocculation process of OMW to select the optimum coagulant dosage. The coagulation and flocculation process was carried out by adding aluminum sulfate (Alum) to the waste stream in different dosages, starting from 100 to 2000 mg/L. In previous research work, optimization of this process on OMW was briefly discussed, but there is no literature available that reports the optimal coagulant dosage verified through the grey relational analysis method; therefore, this method was applied for selecting the best operating conditions for lowering a combination of multi-responses such as chemical oxygen demand (COD), total organic carbon (TOC), total phenols and turbidity. From the analysis, the 600 mg/L coagulant dosage appears to be top ranked, which obtained a higher grey relational grade. The implementation of statistical techniques in OMW treatment can enhance the efficiency of this process, which in turn supports the preparation of waste streams for further purification processes in a sustainable way.
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22
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Karmegam N, Jayakumar M, Govarthanan M, Kumar P, Ravindran B, Biruntha M. Precomposting and green manure amendment for effective vermitransformation of hazardous coir industrial waste into enriched vermicompost. BIORESOURCE TECHNOLOGY 2021; 319:124136. [PMID: 32966968 DOI: 10.1016/j.biortech.2020.124136] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2020] [Revised: 09/11/2020] [Accepted: 09/12/2020] [Indexed: 06/11/2023]
Abstract
Vermitransformation of coir pith (CP) into enriched vermifertilizer has been achieved by amending a green-manure plant, Sesbania sesban (SS) for the first time, and cow dung (CD) in five different combinations: T1(1:0:1), T2(4:3:3), T3(5:3:2), T4(5:4:1) and T5(1:1:0). The substrates were 28 days precomposted with Pleurotus sajor-caju followed by 50 days vermicomposting with Eisenia fetida and Eudrilus eugeniae. Results showed a significant reduction in cellulose, lignin, organic carbon, C/N ratio, C/P ratio and an increase in plant nutrients compared to control. The fertilization index and efficiency of nutrient recovery rate were higher in SS and CD amended CP vermicompost, with a maximum in T2(4:3:3) for E. fetida and T3(5:3:2) for E. eugeniae. The activity of dehydrogenase, urease and cellulase, and phytotoxicity assays further revealed vermicompost stability. The study concludes that T2(4:3:3) and T3(5:3:2) combinations respectively for E. fetida and E. eugeniae is suitable for vermitransformation of CP into enriched vermicompost.
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Affiliation(s)
- Natchimuthu Karmegam
- Department of Botany, Government Arts College (Autonomous), Salem 636 007, Tamil Nadu, India
| | - Mani Jayakumar
- Department of Chemical Engineering, Haramaya Institute of Technology, Haramaya University, Haramaya, Dire Dawa, Ethiopia
| | - Muthusamy Govarthanan
- Department of Environmental Engineering, Kyungpook National University, Daegu 41566, Republic of Korea
| | - Ponnuchamy Kumar
- Department of Animal Health and Management, Alagappa University, Karaikudi 630 003, Tamil Nadu, India
| | - Balasubramani Ravindran
- Department of Environmental Energy and Engineering, Kyonggi University, Youngtong - Gu, Gyeonggi -Do 16227, Republic of Korea
| | - Muniyandi Biruntha
- Department of Animal Health and Management, Alagappa University, Karaikudi 630 003, Tamil Nadu, India.
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Antioxidant Efficacy of Olive By-Product Extracts in Human Colon HCT8 Cells. Foods 2020; 10:foods10010011. [PMID: 33374501 PMCID: PMC7822158 DOI: 10.3390/foods10010011] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2020] [Revised: 12/16/2020] [Accepted: 12/19/2020] [Indexed: 12/11/2022] Open
Abstract
The production of olive oil is accompanied by the generation of a huge amount of waste and by-products including olive leaves, pomace, and wastewater. The latter represents a relevant environmental issue because they contain certain phytotoxic compounds that may need specific treatments before the expensive disposal. Therefore, reducing waste biomass and valorizing by-products would make olive oil production more sustainable. Here, we explore the biological actions of extracts deriving from olive by-products including olive pomace (OP), olive wastewater (OWW), and olive leaf (OLs) in human colorectal carcinoma HCT8 cells. Interestingly, with the same phenolic concentration, the extract obtained from the OWW showed higher antioxidant ability compared with the extracts derived from OP and OLs. These biological effects may be related to the differential phenolic composition of the extracts, as OWW extract contains the highest amount of hydroxytyrosol and tyrosol that are potent antioxidant compounds. Furthermore, OP extract that contains a higher level of vanillic acid than the other extracts displayed a cytotoxic action at the highest concentration. Together these findings revealed that phenols in the by-product extracts may interfere with signaling molecules that cross-link several intracellular pathways, raising the possibility to use them for beneficial health effects.
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