As dairy industries has been emerged as one of the most rapidly developing industry in both small as well as large scale, the volume of effluent generated is also very high. In the present study, aerated electrocoagulation combined with phytoremediation treatment was conducted in dairy industry wastewater. Electrocoagulation was performed with aluminium and iron electrodes and effect of various operating parameters such as electrode combination, pH, and voltage were tested. Electrocoagulation was found effective at neutral pH and its efficiency increased with increase in applied voltage. The maximum COD removal efficiency of 86.4% was obtained in case of Al-Fe electrode combination with aeration at 120 min reaction time, initial pH 7, voltage 5 V. Significant growth of Canna indica was observed in electrocoagulation treated wastewater compared to raw dairy wastewater. COD removal of 97% was achieved when combined electrocoagulation and phytoremediation process was used. Thus, it proves to be a proficient method for the treatment of dairy industry wastewater. In addition to the above, bacterial toxicity tests were performed to investigate the toxic nature of wastewater and the results showed that both treated and untreated wastewater favoured bacterial growth.

中文翻译：

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联合曝气电凝和植物修复工艺处理乳业废水。

乳业已成为小规模和大规模发展最快的行业之一，因此产生的废水量也很大。在本研究中，对乳业废水进行了曝气电凝结合植物修复处理。用铝和铁电极进行电凝，并测试各种操作参数（例如电极组合，pH和电压）的影响。发现电凝在中性pH下有效，并且其效率随施加电压的增加而增加。在Al-Fe电极组合的情况下，在120分钟反应时间，初始pH 7，电压5 V的曝气条件下获得的最大COD去除效率为86.4％。与未经处理的乳制品废水相比，在电凝处理后的废水中观察到Canna indica的显着增长。当使用电凝和植物修复相结合的方法时，COD去除率达到97％。因此，它被证明是处理乳业废水的有效方法。除上述以外，还进行了细菌毒性试验以研究废水的毒性，结果表明，处理后和未处理的废水均有利于细菌生长。