Kokilaramani Seenivasan, Satheeshkumar Alagersamy, Nandini M S, Narenkumar Jayaraman, AlSalhi Mohamad S, Devanesan Sandhanasamy, Natarajan Prabhu Manickam, Rajamohan Rajaram, Rajasekar Aruliah, Malik Tabarak
Environmental Molecular Microbiology Research Laboratory, Department of Biotechnology, Thiruvalluvar University, Vellore, Tamilnadu, India.
Department of Microbiology, Sree Balaji Medical College and Hospital, Chennai, Tamil Nadu, India.
Front Microbiol. 2024 Mar 13;15:1297721. doi: 10.3389/fmicb.2024.1297721. eCollection 2024.
Cooling towers are specialized heat exchanger devices in which air and water interact closely to cool the water's temperature. However, the cooling water contains organic nutrients that can cause microbial corrosion (MC) on the metal surfaces of the tower. This research explores the combined wastewater treatment approach using electrochemical-oxidation (EO), photo-oxidation (PO), and photoelectrochemical oxidation (PEO) to contain pollutants and prevent MC.
The study employed electro-oxidation, a process involving direct current (DC) power supply, to degrade wastewater. MC studies were conducted using weight loss assessments, scanning electron microscopy (SEM), and x-ray diffraction (XRD).
After wastewater is subjected to electro-oxidation for 4 h, a notable decrease in pollutants was observed, with degradation efficiencies of 71, 75, and 96%, respectively. In the wastewater treated by PEO, microbial growth is restricted as the chemical oxygen demand decreases.
A metagenomics study revealed that bacteria present in the cooling tower water consists of 12% of genus and 22% of genus. Conclusively, PEO serves as an effective method for treating wastewater, inhibiting microbial growth, degrading pollutants, and protecting metal from biocorrosion.
冷却塔是一种特殊的热交换器设备，空气和水在其中密切相互作用以降低水温。然而，冷却水中含有有机养分，会对冷却塔的金属表面造成微生物腐蚀（MC）。本研究探索了使用电化学氧化（EO）、光氧化（PO）和光电化学氧化（PEO）的联合废水处理方法，以控制污染物并防止微生物腐蚀。
该研究采用电氧化法，即一种涉及直流（DC）电源的过程，来降解废水。使用失重评估、扫描电子显微镜（SEM）和X射线衍射（XRD）进行微生物腐蚀研究。
废水经过4小时的电氧化后，污染物显著减少，降解效率分别为71%、75%和96%。在经光电化学氧化处理的废水中，随着化学需氧量的降低，微生物生长受到限制。
宏基因组学研究表明，冷却塔水中存在的细菌分别占属的12%和属（原文此处有误，推测为另一个属）的22%。总之，光电化学氧化是一种处理废水、抑制微生物生长、降解污染物以及保护金属免受生物腐蚀的有效方法。
