Details

Autor(en) / Beteiligte

• Dey, Iman
• Pal, Ruma

Titel

Cost-effective tannery wastewater treatment using cyanobacteria: insights on the growth pattern and seedling vigor improvement with spent biomass

Ist Teil von

• 3 Biotech, 2023-09, Vol.13 (9), p.295, Article 295

Ort / Verlag

Cham: Springer International Publishing

Erscheinungsjahr

2023

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Nowadays to cope-up with the emerging global clean-water crisis , wastewater needs to be remediated properly to be used as an alternative source. Here a cost-effective approach has been taken to treat heavily-polluted (BOD-1234.33 mg L −1 , COD-1706.64 mg L −1 , TDS-6984 mg L −1 , and sulfide-140.8 mg L −1 ammonium-134.5 mg L −1 ) Tannery Waste Water (TWW). Three cyanobacteria were ( Arthrospira platensis ,  Leptolyngbyavalderiana , and Anabaenasphaerica ) used as bio-reagents in pilot-scale treatment. Wastewater remediation-potential and biomass-generation capacity were evaluated in various TWW concentrations. The maximum biomass growth and the highest pollution removal percentage was observed when exposed to 50% TWW; although among the tested strain, Arthrospira and Leptolyngbya performed better than Anabaena by showing greater pollution removal potential (BOD 93%, COD 94%, sulfide 99%, ammonium 93%) in one hand and higher biomass production rate (100 mg L −1 Day −1 ) on the other. DO was increased noticeably by 10–15-fold. Morphological characterizations of tannery wastewater exposed Anabaena revealed unusual thick sheath formation, along with heterocyst and akinete formation in their trichome. Biochemical characterizations of remediating cyanobacteria showed presence of wastewater-accumulated nutrients (N, P, K). Nutrient-loaded biomass improved growth of rice and chickpea seedlings when used as a growth promoter. These facts have been illustrated by factor analysis and discriminant analysis. Cyanobacteria-mediated pilot-scale tannery wastewater treatment would create ecologically and economically-sustainable technology for clean-water production.