a Biological Oceanography Division , CSIR - National Institute of Oceanography , Dona Paula , Goa , India.
Int J Phytoremediation. 2018 Feb 23;20(3):284-292. doi: 10.1080/15226514.2017.1374338.
This study evaluated the bioremediation potential of two marine microalgae Chlorella sp. and Phormidium sp., both individually and in consortium, to reduce various pollutants in tannery wastewater (TW). The microalgae were grown in hazardous 100% TW for 20 days, and the reductions in biochemical oxygen demand (BOD), chemical oxygen demand (COD), total nitrogen (TN), total phosphorous (TP), chromium (Cr) and total dissolved solids (TDS) of the wastewater monitored periodically. Both marine isolates reduced the BOD and COD by ≥90% in the consortium and by over 80% individually. Concentrations of TN and TP were reduced by 91.16% and 88%, respectively, by the consortium. Removal/biosorption efficiencies for chromium ranged from 90.17-94.45%. Notably, the TDS, the most difficult to deal with, were reduced by >50% within 20 days by the consortium. The novel consortium developed in this study reduced most of the ecologically harmful components in the TW to within the permissible limits of discharge in about 5 to 15 days of treatment. Thus, both the tested marine strains of Chlorella and Phormidium sp. are promising for bioremediating/detoxifying TW and adequately improve the water quality for safe discharge into open water bodies, in particular when used as a consortium.
本研究评估了两种海洋微藻——小球藻（Chlorella sp.）和束丝藻（Phormidium sp.）——单独和联合使用时对制革废水（TW）中各种污染物的生物修复潜力。将微藻在 100%危险的 TW 中培养 20 天，并定期监测废水中生化需氧量（BOD）、化学需氧量（COD）、总氮（TN）、总磷（TP）、铬（Cr）和总溶解固体（TDS）的减少情况。两种海洋分离株在 consortium 中使 BOD 和 COD 降低了≥90%，单独使用时降低了超过 80%。TN 和 TP 的浓度分别降低了 91.16%和 88%。对于铬的去除/生物吸附效率为 90.17-94.45%。值得注意的是，在 20 天内， consortium 将最难处理的 TDS 降低了>50%。本研究中开发的新型 consortium 在大约 5 到 15 天的处理时间内，将 TW 中大多数对生态有害的成分降低到允许排放的范围内。因此，小球藻和束丝藻这两种测试用海洋菌株都具有生物修复/解毒制革废水的潜力，并能显著提高水质，使其安全排入开放水体，尤其是当作为 consortium 使用时。
