Evidence of inert fractions in olive mill wastewater by size and structural fractionation before and after thermal acid cracking treatment

Haksevenler, Betül Hande Gürsoy; Arslan-Alaton, İdil

doi:10.1016/j.seppur.2015.09.024

Cited by 11 publications

(5 citation statements)

References 37 publications

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“…A wide spectrum of physico‐chemical processes including adsorption, electrocoagulation, ozonation, electrochemical methods and other advanced oxidation techniques were also tested with encouraging results but without much concern for the cost involved in large‐scale applications . Furthermore, size distribution analysis based on partitioning of wastewater has been implemented for olive mill wastewater after a chemical treatment process (thermal acid cracking) by Gursoy‐Haksevenler et al in which the inert organic matter content of olive mill wastewater has been associated to the soluble and colloidal size fractions. Apart from these processes, direct membrane filtration was proposed as a viable alternative treatment method for olive mill wastewater .…”

Section: Introductionmentioning

confidence: 99%

Particle size distribution analysis of chemically enhanced two‐phase membrane filtration for olive mill effluents

Khaligh

Yağcı

Balcik

et al. 2016

J of Chemical Tech & Biotech

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BACKGROUND This study used particle size distribution (PSD) to reveal how chemical conditioning inflicted changes on different chemical oxygen demand (COD) size fractions to improve the potential of two‐phase membrane separation as an effective preliminary step for the sustainable management of olive processing wastewaters. RESULTS Experiments were designed to explore: (i) the potential of membrane separation as a pretreatment step; and (ii) the way in which chemical conditioning improved the removal potential of membrane treatment. Particle size distribution analysis was conducted to observe changes inflicted on different COD size fractions by chemical conditioning. The chemically enhanced membrane process achieved 95% COD removal, reducing the effluent COD to 6000–8000 mg L−1 range and the total phenol down to 100 mg L−1. Chemical conditioning also removed a significant portion of soluble COD, so that the resulting PSD fingerprint in the effluent was properly reshaped to allow effective removal by membrane treatment. CONCLUSION The investigated treatment schemes involving pretreatment of oil wastewater by chemical conditioning together with membrane filtration offered high COD reduction in the effluent and biodegradable permeate when properly diluted for co‐treatment with a compatible wastewater stream. The use of chemical conditioning prior to membrane filtration improved final permeate quality and ultrafiltration membrane flux. © 2016 Society of Chemical Industry

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Section: Introductionmentioning

confidence: 99%

Particle size distribution analysis of chemically enhanced two‐phase membrane filtration for olive mill effluents

Khaligh

Yağcı

Balcik

et al. 2016

J of Chemical Tech & Biotech

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“…Olive mill wastewaters (OMW) have always been a source of attraction for extensive research for appropriate treatment and disposal . The continuing lack of a sustainable approach that may be generally adopted for OMW management may be attributed to a number of factors: (i) a significant fraction of the industry still involve small‐scale ‘family business’ olive farms, scattered in the countryside, with no means to afford expensive solutions; (ii) the production is seasonal and limited to 3–4 months per year, which discourages and excludes certain treatment schemes such as biological processes requiring continuous operation; (iii) the characteristics of the wastewater are complex, always involving high organic matter together with recalcitrant compounds such as phenols, polyphenols, tannins, long chain fatty acids, which have toxic impacts on biological processes; (iv) the nature of most research efforts which mostly concentrate on a single field of technology expertise failing to provide a sustainable solution, often neglecting the economic feasibility …”

Section: Introductionmentioning

confidence: 99%

Biodegradation of pretreated olive mill effluent in mixture with a domestic sewage or compatible wastewater stream

Khaligh

Yağcı

Ubay‐Cokgor

et al. 2016

J of Chemical Tech & Biotech

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BACKGROUND The study focused on the biodegradation of pretreated olive mill wastewater (OMW) properly diluted in and mixed with a biodegradable substrate and/or domestic sewage stream. It utilized the permeate of a chemically conditioned two‐stage ultrafiltration/nanofiltration system with COD of 5700 mg L−1 and a total phenol content of 100 mg L−1. Peptone mixture with similar characteristics to domestic sewage was adopted as the biodegradable synthetic substrate. The study relied on two sets of microbial culture; one acclimated to peptone and the other to a mixture of peptone and domestic sewage. Respirometric analyses were conducted on pretreated OMW diluted in the selected substrate using corresponding biomass seeding. RESULTS Model evaluation of the oxygen uptake rate profiles indicated that the pretreated OMW was fully consumed in the respirometric tests. There were no inhibitory/toxic impacts of OMW dosing on the biomass. The entire biomass participated in the utilization of OMW/substrate with no metabolic adjustment problems. CONCLUSION Experimental results provided conclusive evidence that co‐treatment with a domestic sewage stream is a viable option for OMW management, after a chemically conditioned two‐stage filtration used as the pretreatment step. Pretreatment removes the recalcitrant nature of the wastewater, which becomes fully biodegradable under appropriate dilution and mixing conditions. © 2016 Society of Chemical Industry

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“…At present, the acidified oil wastewater in China is not properly treated. Some acidified oil wastewaters were directly discharged into natural water bodies without treatment, resulting in eutrophication problems of surface water bodies such as surrounding lakes and reservoirs, and seriously endangering the safety of drinking water sources [2,3]. On the other hand, as a non-renewable resource, phosphorus plays an indispensable role in human, animal, and plant life activities.…”

Section: Introductionmentioning

confidence: 99%

Effect of operating conditions on phosphorus recovery from acidified plant oil wastewater by struvite crystallization

Ren

Cui

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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Struvite crystallization is an effective method for recovery of nitrogen and phosphorus from wastewater, and the operating parameters are crucial to the efficient phosphorus removal and struvite crystallization. In this study, the effects of pH, N-P ratio and Mg-P ratio on the phosphorus recovery from acidified plant oil wastewater were investigated. The results showed that the optimal operating conditions were pH 10, N-P ratio 1.1:1, and Mg-P ratio 1:1. Under the optimized operational conditions, 88.1% of the total phosphorus was removed from the wastewater. The XRD and SEM-EDS results indicated that the precipitate was struvite.

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Evidence of inert fractions in olive mill wastewater by size and structural fractionation before and after thermal acid cracking treatment

Cited by 11 publications

References 37 publications

Particle size distribution analysis of chemically enhanced two‐phase membrane filtration for olive mill effluents

Particle size distribution analysis of chemically enhanced two‐phase membrane filtration for olive mill effluents

Biodegradation of pretreated olive mill effluent in mixture with a domestic sewage or compatible wastewater stream

Effect of operating conditions on phosphorus recovery from acidified plant oil wastewater by struvite crystallization

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