Effect of pH on the Recovery of Chromium with Removal of COD and Colour from Wastewater of Leather Industry

Author: Moghira Badar* , M.K. Qamar** and M. Saleem Akhtar**

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Abstract

It is based on the experiments conducted for study of chromium removal and recovery from chrome tanning waste water of leather industry for chromium removal about 98.5% was achieved at pH 8.0 and at this pH reduction of COD is 61.5 % and percentage for removal of color from the wastewater of leather industry is 99.5% under applying the batch experimental condition. For this purpose, it is carried out by using the most economical process as precipitation process. To use precipitating agent as calcium hydroxide for effective recovery of chromium is 98.5% at pH 8 for batch experiments. Results also show that the effective pH value is 8 for 61.5 % removal of COD and pH 8 is very optimize for 99 % removal of colour and gives with high settling rate for wastewater treatment from leather industry.

Keywords

Tanning Waste water, Chromium, Recovery, Precipitation Agent, Optimum

Conclusion

Precipitating agent as calcium hydroxide was used. The effects of pH on recovery and removal of Chromium were studied in batch experiments. Results show that the optimum pH is 8 for recovering the chromium from tanning wastewater by using the Ca (OH)2 with effective concentration as 3500 mg/l and also effect of optimum pH value is 8 upon removal of COD, colour and gives with high settling rate from tanning wastewater.

References

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How to cite this article

Moghira Badar* , M.K. Qamar** and M. Saleem Akhtar (2017). Effect of pH on the Recovery of Chromium with Removal of COD and Colour from Wastewater of Leather Industry , Biological Forum – An International Journal 9(1): 77-79.