Sludge volume generated from industrial wastewater treatment
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I would like to ask the experts: what chemicals can be used to reduce the amount of sludge generated by industrial wastewater (containing AO acids and hydrofluoric acid)? The amount of calcium hydroxide sludge is too large, and the cost of sodium hydroxide is too high. The amount of sludge is too large; small and medium-sized enterprises really can’t handle it.
Are there any chemical waste materials that can be neutralized?
There is no perfect solution; it is better to incur higher treatment costs than to generate more hazardous waste. It is also possible to balance the treatment costs and the amount of hazardous waste generated by adjusting the amounts of lime and sodium hydroxide used. It is also possible to use alkaline wastewater for neutralization, which is the most economical method.
Is the amount of sludge generated related to the activity of calcium?
It is related to the purity of lime; it is best to choose calcium hydroxide with a purity of over 95%