Hydrated Lime/slack lime for industry waste water treatment No of Employees ... , ash Calcium Powder1. Features 1). Lower cost for water treatment 2). Widely range of application 3 ... acid waste water PH value, widely used for electroplate, Chemical industry, circuit board, pickling, printing & dyeing and ... place, it will keep good for 6 months. Hydrated Lime/slack lime for industry waste water treatment