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The influence of pH value in wastewater treatment on treatment effect

Feb 01, 2021

There are many kinds of wastewater treatment methods, and the neutralization treatment method is one of the wastewater chemical treatment methods. The basic principle is to make the anions and cations in the acid wastewater or the anions in the alkaline wastewater interact with the external cations to generate weakly dissociated water molecules and at the same time generate other soluble or insoluble salts, thereby Eliminate their harmful effects. This method can treat and recycle acidic wastewater and alkaline wastewater, and adjust the pH value of acidic and alkaline wastewater.

The hydrogen ion concentration index refers to the ratio of the total number of hydrogen ions in the solution to the amount of total substances. Generally called "pH", not "pH". According to the "Comprehensive Wastewater Discharge Standard" GB 8978-88 and the "Urban Wastewater Treatment Plant Pollutant Discharge Standard" GB 18918-2002, the pH value of water discharged from urban sewage plants is 6-9.

In wastewater treatment, under different pH conditions, the effect is significantly different. For example, to remove non-chemical nickel, the pH should be controlled at about 11 for the best effect. When the pH is acidic, larger particle flocs or flocs cannot be formed. Therefore, the control of pH is very important for wastewater treatment.