Electrochemical Water Treatment

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Does anybody have experience in treating water for removal of COD using electrolysis, Fe and Al electrodes? if yes, please share your case study.

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2 Answers

  1. We have a small demonstration pilot plant operating between 1-5 m3/h that we use to do testing at food industries and abattoir plant effluents (Al/Al or Al-combination Fe, inert steel), and also commissioning a 20m3/h plant (Al/Al) to treat toe seep/acid mine drainage in South Africa. We have a unique power electronics system reducing overall electricity (DC) supply.

    Company information can be viewed on www.rare.co.za (Water Treatment Division). Current test work on food/ORGANIC waste have shown good coagulation, but there is still requirement for floc addition post treatment.

    This paper is good and can be used for simulating the reactor for scale-up. Hope to have more information to publish following our trial work.

  2. A preliminary study was conducted at Gurukul Kangri University in North India, for the removal of turbidity (TD), chemical oxygen demand (COD) and biochemical oxygen demand (BOD) from secondarily treated sewage (STS) water through the electrolytic batch mode experiments with DC power supply (12 V) up to 30 min and using a novel concept of electrode combinations of different metals.

    This study revealed that the effluent can be effectively treated with the aluminum (Al) and iron (Fe) electrode combinations (Al–Fe and Fe–Al). The maximum removal of TD (81.51 %), COD (74.36 %) and BOD (70.86 %) was recorded with Al–Fe electrode system, while the removal of these parameters was found to be 71.11, 64.95 and 61.87 %, respectively, with Fe–Al electrode combination.

    The economic evaluation of electrodes showed that Al–Fe electrode combination was better than Fe–Al electrode combination. This revealed the superiority of aluminum as a sacrificial electrode over that of iron which can probably be attributed to better flocculation capabilities of aluminum than that of iron.

    You may see details by connecting to : http://link.springer.com/article/10.1007/s13201-012-0066-x