Abstract
Dyes are an integral part of the dying industry and have significantly resulted in environmental pollution by altering the standard water quality after their discharge into the water bodies. The culprits behind the altered water quality are the pretreatment chemicals used during dying manufacturing processes. Various advanced treatment methods using conventional and advanced treatment options including solar energy have been put forth by researchers for the treatment of the dying effluents but, these methods have not proved significantly considerable. Therefore, the present study intends to check the efficiency of solar parabolic trough collector for treating the dying effluents in terms of color and COD. However, other wastewater parameters (BOD, nitrate and phosphate) have also been considered for this experimental analysis. Four standard flow rates (0.5, 1.3, 1.95 and 2.6 L/M) were maintained during the experiment for six hours at solar intensity (849.3 ± 21.2 W/m2) and the optimized flow rate (1.95 L/M) was detected and considered for further study during the present experiment. The color concentration showed a significant reduction (≥76.4%) by treatment with the designed solar reactor. Similar significant results were also noticed in terms of COD (79%). In this context, the current experimental study provides ideas on the decolorization and COD reduction efficiency with optimal flow rate in terms of cost-effectiveness with designed experimental reactor which could be further used and implemented for advanced scientific purposes.
Highlights
Dyes are always critical for humans as they are a part of human lifestyle and culture and have been used in an assortment of industrial sectors for the manufacturing of various textile products
The results and discussion section has been divided into three sections like characterizations of collected dye contaminated textile industry wastewater, effects of flow rate with the solar reactor, decolorization by solar radiation, and COD reduction by solar radiation
Dye contaminated textile industry wastewater was treated by designed solar reactor with an optimized rate of circulation and noted to have remarkable decolorization and COD reduction
Summary
Dyes are always critical for humans as they are a part of human lifestyle and culture and have been used in an assortment of industrial sectors for the manufacturing of various textile products These dyes are chemical compounds that adhere to surfaces or fabrics to display color and when come in contact with surface water, pose high challenges for the survival of aquatic organisms [1]. Solar energy is the most abundant renewable energy source, capable of degrading toxic chemical compounds and providing a cost-effective as well as renewable-based strategy with a wide range of applications scopes [9,10] It is accessible and could be used for a number of purposes [11]. On the basis of the optimized flow rate, the present experiment was further connected This is an innovative and renewable-based low-cost approach where concentrating solar energy-based treatment has been used for dye-contaminated textile industry wastewater treatment. To examine the efficiency of the solar parabolic trough for decolorization and COD reduction, the solar parabolic trough-reactor was built at lab-scale
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