Department of Environmental and Water Resources Engineering, School of Civil Engineering, Vellore Institute of Technology (VIT), Vellore, 632014, India.
Department of Environmental and Water Resources Engineering, School of Civil Engineering, Vellore Institute of Technology (VIT), Vellore, 632014, India.
Environ Res. 2020 Apr;183:109163. doi: 10.1016/j.envres.2020.109163. Epub 2020 Jan 21.
For the exploration of an effective and economical method to treat composite raw tannery effluent, the integrated approach of Ozonation and phycoremediation was followed. In a lab-scale Ozone reactor, the highest performance index was attained, when it was operated at a low O flowrate (2 g/h) condition. The tannery effluent partially treated by Ozonation (≈60% COD removed in 90 min) with the ozone consumption of 1.5 g of O/g of COD, at pH 7.6, coupled with phycoremediation had improved the tannery effluent characteristics to a considerable extent. Overall, the maximum reduction in pollutant concentration attained with the combined treatment was 84% for COD, 60% for colour, 100% for odour, 90% for inorganic carbon, 82% for NH- N, 100% for PO-P, 97% for chromium and 10% for TDS. In phycoremediation, microalgae Nannochloropsis oculata had shown an enhanced growth (μ = 0.255 day) with a maximum cell density of 5.2 × 10 cells/mL, dry biomass of 0.86 g L and cell division rate of 0.369 day. Elemental analysis of biomass validated the chromium remediation along with other elements such as calcium, magnesium, sodium, potassium, zinc, and iron from the tannery effluent. Therefore, the phycoremediation integrated ozone process can be considered as a feasible treatment method for tannery effluent along with value-added biomass production.
为了探索一种有效且经济的方法来处理综合制革废水，采用了臭氧化和藻修复的集成方法。在实验室规模的臭氧反应器中，当以低臭氧流量（2 g/h）条件运行时，达到了最高的性能指标。臭氧处理部分制革废水（90 分钟内去除约 60%的 COD），臭氧消耗量为 1.5 g O/g COD，pH 值为 7.6，与藻修复相结合，极大地改善了制革废水的特性。总的来说，组合处理可将污染物浓度最大降低 84%（COD）、60%（颜色）、100%（气味）、90%（无机碳）、82%（NH-N）、100%（PO-P）、97%（铬）和 10%（TDS）。在藻修复中，微藻眼点拟微绿球藻（Nannochloropsis oculata）表现出增强的生长（μ=0.255 天），最大细胞密度为 5.2×10 个细胞/mL，干生物量为 0.86 g/L，细胞分裂率为 0.369 天。生物质的元素分析验证了铬的修复，以及来自制革废水的其他元素，如钙、镁、钠、钾、锌和铁。因此，藻修复集成臭氧工艺可以被认为是一种可行的制革废水处理方法，同时还可以生产增值生物质。
