An eco-friendly approach towards treatment of tannery lime liquor using halo tolerant alkaliphile of extreme origin

Khambhaty, Yasmin; Ojha, Khyati; Akshaya, R; Charyulu, E. Madhava

doi:10.1016/j.jclepro.2017.05.167

Cited by 10 publications

(2 citation statements)

References 16 publications

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“…Another alternative consisted on the extraction of carrageenan, with a yield dependent on the operation scale (26–31%, w / w ), then the acid hydrolysis (0.9 N H 2 SO 4 , 100 °C, 1 h) and further saccharification. The hydrolysate was then neutralized with lime and the filtrate was desalted by electrodialysis and converted to ethanol by S. cerevisiae with 80% conversion yield, although 50% of the total organic carbon initially present remained unutilized [75].…”

Section: Biorefinery Strategiesmentioning

confidence: 99%

Successful Approaches for a Red Seaweed Biorefinery

et al. 2019

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Macroalgae have been commercially exploited as food and for the production of phycocolloids, but they also contain compounds with potential in pharmaceutical, nutraceutical, cosmetic, chemical and energetic applications. The biorefinery concept applied to seaweed facilitates the extraction of different constituents ensuring full utilization of resources and generating few residues through a succession of steps. Seaweed biorefineries are less advanced than those based on terrestrial biomass and the design of efficient processes requires further study. This review presents practical successful examples to obtain two or more commercially valuable components from red seaweeds. The selected processes consist on cascading stages of both conventional and alternative techniques to illustrate different possible valorization strategies.

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Section: Biorefinery Strategiesmentioning

confidence: 99%

Successful Approaches for a Red Seaweed Biorefinery

et al. 2019

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“…Another alternative has been the use of biological treatments, which has involved the use of microorganisms to naturally degrade or convert pollutants in the effluent, including the excess of hydrogen and hydroxide ions. This method was seen to be less expensive than chemical neutralization and could result in the production of less harmful by-products (Jain et al, 2014; Khambhaty et al, 2017; Kulshreshtha et al, 2010).…”

Section: Discussionmentioning

confidence: 99%

Ecotoxicological response surface analysis of salt and pH in textile effluent on Bacillus subtilis and Lactuca sativa

Mainardi,

Bidoia

2023

Toxicol Ind Health

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Textile effluents, although their composition can vary considerably, typically contain high levels of dissolved salts and exhibit wide variations in pH. Ecotoxicological studies regarding the effects of these parameters, however, have been limited owing to the need for sensitive and easy-to-handle bioindicators that require low amounts of sampling, are cost-effective, time-efficient, and ethically endorsed. This kind of study, additionally, demands robust multi-factorial statistical designs that can accurately characterize the individual and combined relationship between variables. In this research, Response Surface Methodology (RSM) was used to calculate the individual and interaction effects of NaCl concentration and pH value of a Simulated Textile Effluent (STE) on the development rate (DR) of the bioindicators: Bacillus subtilis bacteria and Lactuca sativa lettuce. The results demonstrated that the bioindicators were sensitive to both NaCl and pH factors, where the relative sensitivity relationship was B. subtilis > L. sativa. The quadratic equations generated in the experiments indicated that increased concentrations of 50-250 mg L−1 of NaCl caused a perturbance of 1.40%–34.40% on the DR of B. subtilis and 0.50%–12.30% on L. sativa. The pH factor at values of 3–11 caused an alteration of 27.00%–64.78% on the DR of the B. subtilis and 51.37%–37.37% on the L. sativa. These findings suggest that the selected bioindicators could serve as effective tools to assess the ecotoxicological effects of textile effluents on different ecological systems, and the RSM was an excellent tool to consider the ecotoxicological effects of the parameters and to describe the behavior of the results. In conclusion, the NaCl and pH factors may be responsible for disrupting different ecosystems, causing imbalances in their biodiversity and biomass. Before discharge or reuse, it is suggested to remove salts and neutralize pH from textile effluents and, mostly, develop novel, eco-friendlier textile processing techniques.

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