Modeling of permeate flux decline during ultrafiltration of polyvinyl alcohol in a batch cell

Balyan, Upasna; Sarkar, Biswajit

doi:10.1080/19443994.2013.831785

Cited by 3 publications

(1 citation statement)

References 24 publications

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“…This compound, which is also used in other industries (such as textile, manufacturing, and pharmaceutical) is therefore present in a large amount of industrial effluents . Because of its polymeric structure, PVA is a low biodegradability compound that has been found to negatively interfere, even producing the collapse of the system, in membrane technology by clogging them and producing foaming episodes. − Therefore, the state of the art shows the current bottleneck of water reuse through ultrafiltration (UF) and reverse osmosis (RO).…”

Section: Introductionmentioning

confidence: 99%

MBR+RO Combination for PVC Production Effluent Reclamation in the Resin Polymerization Step: A Case Study

Blanco

Hermosilla

Blanco

et al. 2016

Ind. Eng. Chem. Res.

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The feasibility to reclaim the effluent for reuse in the PVC polymerization step of a PVC factory located in Spain was demonstrated at pilot scale. The treatment of the PVC effluent after the physicochemical step by MBR+RO was carried out during 15 months. Results show a high organics removal and total poly(vinyl alcohol) abatement after one month of reclamation. Thus, the current bottleneck associated with the implementation of this technology in the presence of poly(vinyl alcohol) was removed. Full nitrification and nitrogen removal efficiencies close to 80% were achieved working under anoxic/aerobic conditions. Moreover, under appropriate working conditions the system showed high robustness in front of different events/instabilities and inlet characteristics/intermittent load due to quickly recovered stability and production of a high-quality permeate for demineralization in the desalination unit. In addition, the permeability in the ultrafiltration stage showed high stability and could be very well recovered after chemical cleanings. The two-pass RO permeate quality fit the required specifications for being reused in the PVC process (conductivity <10 μS cm −1 ) working under both full aerobic and anoxic/aerobic conditions during biological treatment. Moreover, high-quality PVC resins were obtained when the recycled effluent was used as fresh water in the polymerization step, thus demonstrating the feasibility of further closing the water loop within the PVC industry.

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Section: Introductionmentioning

confidence: 99%

MBR+RO Combination for PVC Production Effluent Reclamation in the Resin Polymerization Step: A Case Study

Blanco

Hermosilla

Blanco

et al. 2016

Ind. Eng. Chem. Res.

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Assessing demineralization treatments for PVC effluent reuse in the resin polymerization step

Blanco

Hermosilla

Negro

et al. 2017

Environ Sci Pollut Res

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To reduce fresh water consumption in a polyvinyl chloride (PVC) plant, the effluent from a biological treatment must be demineralized to be re-used in the resin polymerization process. Demineralization is a critical process, since the quality and the stability of the PVC resins are highly influenced by the water quality used in the process. The main target values for water parameters are the following: conductivity <10 μScm, TOC < 10 mg L, and Al < 0.1 mg L. To achieve this quality, several reverse osmosis membranes from different materials and suppliers were tested and compared in the demineralization treatment. Polyamide membranes showed higher salt rejection compared to cellulose acetate membranes yielding both types similar flux and permeability. Two-pass reverse osmosis treatment was necessary to reach conductivities lower than 10 μS cm. On the other hand, a good quality effluent for reuse was obtained by combining RO and ionic exchange resins. Results showed that good quality PVC resins in terms of color, granulometry, porosity, and bulk density were obtained when demineralized water from two-pass reverse osmosis was used as fresh water, proving the feasibility of the effluent reuse in the PVC industry.

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Drivers and economic aspects for the implementation of advanced wastewater treatment and water reuse in a PVC plant

Prieto¹,

Swinnen

Blanco

et al. 2016

Water Resources and Industry

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Modeling of permeate flux decline during ultrafiltration of polyvinyl alcohol in a batch cell

Cited by 3 publications

References 24 publications

MBR+RO Combination for PVC Production Effluent Reclamation in the Resin Polymerization Step: A Case Study

MBR+RO Combination for PVC Production Effluent Reclamation in the Resin Polymerization Step: A Case Study

Assessing demineralization treatments for PVC effluent reuse in the resin polymerization step

Drivers and economic aspects for the implementation of advanced wastewater treatment and water reuse in a PVC plant

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