With the continuous progress of society, the problem of water pollution has always been a concern for everyone. All major indicators have seriously exceeded the standards. What we need to do is to process and monitor these indicators and ensure they are qualified before discharging them! Among them, acid and alkali in wastewater are one of the more common items. In this chapter, the online water quality monitoring instrument manufacturer will work with you to understand the principle issues of treating acidic and alkaline wastewater!
First of all, it should be understood that acidic wastewater mainly comes from places such as chemical plants, dye factories, and electroplating plants, which contain various harmful substances or types of heavy metal salts. Among them, the mass fraction of acid varies greatly, with the lower ones being less than 1% and the higher ones being more than 10%. So where does the alkaline wastewater mainly come from? It mainly comes from dyeing and printing factories, leather factories, paper mills, etc. These places contain organic bases or inorganic bases. The mass fraction of alkali is sometimes higher than 5%, but sometimes lower than 1%. Among acidic and alkaline wastewater, apart from acids and bases, the more common ones are acid salts, basic salts, and some other inorganic and organic substances. In addition, acid and alkali wastewater is highly corrosive and must be properly treated before being discharged.
What are the Principles for Treating Acidic and Alkaline Wastewater? It can be Viewed from the Following two Points:
If it is high-concentration acid and alkali wastewater, the issue of recycling and utilization should be considered first. According to the quality, weight of the water and the requirements of different processes, the relevant areas should be dispatched to reuse it as much as possible. However, if it is difficult to reuse, or if the concentration is too low and the water volume is too large, then the method of concentration is adopted to recover the acid and alkali.
In low-concentration acid and alkali wastewater, if it is the cleaning water from an acid washing tank or the rinsing water from an alkali washing tank, neutralization treatment is required. For neutralization treatment, the first thing to consider is the principle of treating waste with waste. For instance: neutralizing acidic and alkaline wastewater, utilizing acidic wastewater from waste alkali, and neutralizing alkaline wastewater from waste acid, etc. If these conditions are not available, neutralizing agents can also be used for treatment.
The above is a simple introduction to the treatment of acidic and alkaline wastewater together with everyone! Of course, to ensure the safety of water quality, online water quality monitoring is indispensable! Users can choose the water quality monitoring equipment that suits them according to their own situations.
