Monitoring: Physic‐Chemical, Microbiological, and Phytotoxic Parameters of Mixed Oil Mill Waste and Green Waste Composts Moistened with Treated Urban Wastewater and Tap Water

Tangour, Dhouha; Aïchi, Hamouda; Yeddes, Nizar; Jrad, Amel; Trabelsi‐Ayadi, Malika

doi:10.1080/1065657x.2016.1172055

Cited by 4 publications

(4 citation statements)

References 33 publications

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“…Over the composting period, C:N ratio significantly decreased. These results are in agreement with Tangour et al (2019) who observed a decrease in the C/N ratio after the maturation of compost piles and suggested that the C/N ratio declines with time because of the organic matter mineralization by micro‐organisms facilitating the conversion of organic carbon into carbon dioxide. do Carmo et al (2016) also reported a rise in inorganic matter with a decrease in the C:N ratio.…”

Section: Discussionsupporting

confidence: 93%

Effectiveness of compost inoculated with phosphate solubilizing bacteria

Ahmad

Zafar

Khan

et al. 2022

Journal of Applied Microbiology

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Aims:The present study was carried out to design a phosphate solubilizing bacterial (PSB)-based biofertilizer using locally produced fruit waste. Method and results:Two PSB strains Pseudomonas aeruginosa CMG4 and AAC1 were inoculated into compost. Six compost piles were prepared with carbon:nitrogen (C:N) ratio 30:1. Four piles were inoculated with PSB and two piles served as a control. After 125 days, composts were considered mature at 29-31°C in the pH range of 7.1-7.3 and 32%-35% moisture content (MC). Accessible calcium (Ca) content increased up to 50 g kg −1 . Microbial analysis showed the survival of P. aeruginosa species in the maturing compost even at higher temperature (~53°C). Native bacterial load was retrieved in the range of 10 9 -10 11 CFUg −1 . Heavy metal concentrations including copper (Cu), lead (Pb), chromium (Cr) and cadmium (Cd) were found to occur below critical thresholds. Seed germination index for compost toxicity was found to be >80%, significantly higher than animal manure and chemical fertilizer, that is, 78% and 31%, respectively, suggesting non-toxicity. Conclusions:The evaluation of prepared compost by physicochemical parameters revealed that inoculation of P. aeruginosa does not affect the temperature, MC, carbon to nitrogen ratio, organic matter and Mg content but significantly increased the accessible Ca content, suggesting the solubilization of inorganic Ca bound phosphate. Compost was safe in terms of heavy metal concentration and seed germination. Significance and impact of study:This study encourages that the PSB-rich tailored compost can be utilized as a phosphatic biofertilizer to fulfil the demand for phosphorus which would improve and sustain soil fertility.

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Section: Discussionsupporting

confidence: 93%

Effectiveness of compost inoculated with phosphate solubilizing bacteria

Ahmad

Zafar

Khan

et al. 2022

Journal of Applied Microbiology

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“…At the end of the co-composting process, the concentration of trace metals are lower than those initial values as illustrated in Table 2. The decrease of TOC after 6 months of treatment was explained by the decomposition of organic carbon by microorganisms as reported by Tandy et al (2009) and Tangour et al (2019).…”

Section: Resultssupporting

confidence: 59%

“…The increase of C/N is due to the biodegradability in organic matter fractions, leading to the reduction of total nitrogen and slightly increase of the total carbon content as reported by Bernal et al (1998), López-López and López-Fabal (2016), and Ostos et al (2008). Therefore, the obtained quality of GW0, GW25, and GW50 is acceptable, since the C/N ratios are at the range of 12, a recommended value for a municipal waste compost as reported by Bernal et al (1998) and Tangour et al (2019).…”

Section: Resultsmentioning

confidence: 91%

Storage facilities reclamation using dredged sediments from waterways: Growing media formulation for plants according to the EU Ecolabel requirements

et al. 2021

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Dredged sediments display a great potential for growing media applications; however, there are few studies about their beneficial reuse for the waste storage reclamation. This research study aims at checking the agronomic values and environmental impacts of three growing media based on waterways sediments (WSs) and green waste (GW) according ecolabel requirements. For this purpose, three growing media named GW0, GW25, and GW50 were prepared at field pilot scale by co-composting WS and GWs during 12 months. Samples were submitted to ecolabel analyses package. Following to the ecolabel requirements, the growing media comply with criteria like pH, electrical conductivity, trace elements and polycyclic aromatic hydrocarbon contents, chlorides, and pathogens, whereas they are not in compliance with the EU Ecolabel guidelines for propagules, organic matter, and zinc contents. Results of laboratory leaching tests performed according to NF EN 12457-2 for GW0, GW25, and GW50 have shown that sulfates, soluble fraction exceed limit for inert waste storage. Lysimeter tests at pilot scale were performed during 6 months to check the leaching potential of pollutants from growing media under real field conditions, including a European ecolabel product. Results demonstrate that Ba, Mo, Sb, Zn, Se, and Sb are higher in GW0, GW25, and GW50 than in the European ecolabel. As, Cd, Cr, Ni, and F− are more soluble in the commercial product compared to other growing media. This study allowed to demonstrate that main characteristics are fulfilling for reusing these growing media in the specific field of waste storage reclamation.

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“…Indeed, the OMWW amounts to 1 million m 3 per year and has a very high organic load, recalcitrant in nature and with a high amount of toxicity compounds [1]. Several solutions have been examined for the management of this effluent such as biological treatment processes [2], additions in composting [3,4], ferti-irrigation [5] as well as valorization in the civil engineering field [6]. The storage of OMWW in evaporation ponds, which are authorized but unfortunately uncontrolled, remains the most adopted solution [1].…”

Section: Introductionmentioning

confidence: 99%

The use of geomembrane as a remediation towards a sustainable OMWW landfilling: Case study of Agareb site in Sfax, Tunisia

S’habou

Salem

2023

E3S Web Conf.

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In Tunisia, olive mill wastewater (OMWW) locally named ‘margine’ constitutes a serious problem due to its huge amount, of about one million ton per year, and the high pollutant load resulting in the excessive chemical oxygen demand (COD) values and the presence of phytotoxic and antibacterial polyphenols. The most common treatment of OMWW was storage in evaporation ponds which are authorized but uncontrolled. Thus, it represents a potential contamination source of natural resources (air, soil and water) via infiltration. This study aims at a critically analysing the OMWW storage management on the site of Agareb in Sfax, Tunisia. The data relating to the OMWW production highlights that it exceeds its storage capacity due to the uncomplete OMWW evaporation. The geotechnical investigations confirmed the spread of OMWW through and below the storage basins. Furthermore, multiple slope sliding has been observed within embankments separating the OMWW storage basins. Faced with this alarming situation, the assessment of the incorporation of geomembrane is analysed in order to ensure the sustainability of OMWW landfilling. The slope stability analysis based on limit-equilibrium method (LEM) using Midas-Soil works software was investigated. The use of geomembrane can secure the slope stability and limit OMWW infiltrations in the landfill body and sub-soils in the studied site.

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Monitoring: Physic‐Chemical, Microbiological, and Phytotoxic Parameters of Mixed Oil Mill Waste and Green Waste Composts Moistened with Treated Urban Wastewater and Tap Water

Cited by 4 publications

References 33 publications

Effectiveness of compost inoculated with phosphate solubilizing bacteria

Effectiveness of compost inoculated with phosphate solubilizing bacteria

Storage facilities reclamation using dredged sediments from waterways: Growing media formulation for plants according to the EU Ecolabel requirements

The use of geomembrane as a remediation towards a sustainable OMWW landfilling: Case study of Agareb site in Sfax, Tunisia

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