An efficient biotreatment process for polyvinyl alcohol containing textile wastewater

Abstract

The aim of this work was to optimize the biodegradation of polyvinyl alcohol (PVA) containing actual textile wastewater for a sustainable treatment solution. The isolated microbial consortia of effective PVA degrader namely Candida Sp. and Pseudomonas Sp., which were responsible for symbiotic degradation of chemical oxidation demand (COD) and PVA from desizing wastewater. In the process optimization, the maximum aeration was essential to achieve a high degradation rate, where as stirring enhances further degradation and foam control. Batch experiments concluded with the need of 16 lpm/l and 150 rpm of air and stirring speed respectively for high rate of COD and PVA degradation. Optimized process leads to 2 days of hydraulic retention time (HRT) with 85–90% PVA degradation. Continuous study also confirmed above treatment process optimization with 85.02% of COD and 90.3% of PVA degradation of effluent with 2 days HRT. This study gives environment friendly and cost effective solution for PVA containing textile wastewater treatment.

Polyvinyl acetate processing wastewater treatment using combined Fenton’s reagent and fungal consortium: Application of central composite design for conditions optimization

“…Kim et al [17] used a 5 g L -1 of PVA concentration from textile factories to screen PVA degrading bacteria. Another study of Magdum et al [24]. used a desizing effluent from textile industry with 0.531% of PVA.…”

“…The increased biodegradation rate might be due to the presence of nutrients in medium of culture, which allowed to the fungi of the consortium, cellular growth and production of enzymes. Generally, the biodegradation of PVA containing wastewater is characterized by its limited rate and extent of degradation due to the higher value of COD and the lack of nutrients why the correction of the medium with nutrients and the process optimization were generally adopted [24]. Therefore, the optimization of nutrients is necessary to avoid economic lost.…”

“…In some cases it needs to be degraded in T denitrifying conditions [23]. In fact, Magdum et al [24] showed that treatment of effluent with high value of COD from 10,000 to 20,000 mg L −1 O 2 with 0.5 to 1% PVA concentration need a defined microbial consortium with optimization of the process's condition.…”

Polyvinyl alcohol‐based membranes for filtration of aqueous solutions: A comprehensive review

“…[10,11] Presence of hydroxyl groups in its backbone, makes PVA a highly hydrophilic water-soluble polymer. [12,13] Other than hydrophilicity, it possesses other desirable characteristics such as biodegradability, [14,15] biocompatibility, [16,17] nontoxicity, [18,19] transparency, [20,21] acceptable mechanical and thermal strengths as well as excellent fiberforming, [22,23] and film-forming [24,25] abilities. These properties altogether make PVA an alluring choice for such different targets as formation of hydrogels, [26,27] films, [28,29] scaffolds, [30,31] fibers, [32,33] composites, [34,35] and particularly polymeric membranes which will be the main theme of this work.…”

Comparative Studies of Oleaginous Fungal Strains (Mucor circinelloides and Trichoderma reesei) for Effective Wastewater Treatment and Bio-Oil Production

“…But use of sewage wastewater or low strength wastewater for bio-oil or biodiesel production by using yeast or fungi has not been very well reported. Fungi are also known for their efficient carbon reduction and responsible for degradation of various tough to degrade substrates, such as polyvinyl alcohol [ 10 ]. There have been a few explorations into this technology, but most of them aim at growing fungi in nutrient media or synthetic substrates and then extracting lipids through them [ 11 , 12 ].…”