Comparison of four different neutralizers for the treatment of acidic waste water

Authors

  • Jamil Ahmad
  • Muhammad Afzaal Akram
  • Shehzad Khattak
  • Feroz Shah

Keywords:

Lead Acid battery, waste water, neutralization, pH

Abstract

Four different neutralizers i.e. 1N NaOH, NaOH 98 %, Ca(OH)2 and Na2CO3 were tested to neutralize acidic wash water samples from positive plates having pH 1,2 and negative plates having pH 1, 2 from an automotive battery production plant. Comparison of the results shows that the minimum amount of neutralizer used was 1 N NaOH in the case of positive plate (0.052g) and negative plate (0.016 g) wash water with initial pH of 2.  This was followed by NaOH 98 % 0.06 g in the case of positive plate and 0.025 g in the case of negative plate, then Ca (OH)2 of 0.08 g in the case of positive plate and 0.07 g in the case of negative plate. The maximum amount used was that of Na2CO3 0.1 g both for the positive and negative plate wash water. For pH 1 positive plate wash water 1 N NaOH (0.285 g) was the minimum and NaOH 98 % (0.75 g) was maximum. However for the negative plate wash water of pH 1 the trend was reverse i.e. NaOH 98 (0.215 g) was minimum and 1N NaOH (0.568 g) was maximum for bringing the pH of acidic waste water to a neutral value of 7.

 

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Published

2017-07-25

How to Cite

Ahmad, J., Akram, M. A., Khattak, S., & Shah, F. (2017). Comparison of four different neutralizers for the treatment of acidic waste water. Journal of the Pakistan Institute of Chemical Engineers, 45(1), JPIChE 45 (1) 2017 129–136. Retrieved from http://piche.org.pk/journal/index.php/jpiche/article/view/365

Issue

Vol. 45 No. 1 (2017): Journal of Pakistan Institute of Chemical Engineers

Section

Articles

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