When the dyeing liquid containing sodium sulfate, alum, lime and iron salts, etc., must be added chelating agent.
当印染液中含有硫酸钠、明矾、石灰和铁盐等，必须加入螯合剂。
The final solution containing arsenic was treated by adding lime and ferric salt, and waste water reached discharge standard.
最后的含砷溶液加入石灰和铁盐加以处理，废水达到了排放标准。
The influencing factors of copper precipitation velocity have been studied by using lime to treat copper-containing wastewater.
系统地研究了影响石灰中和法处理转炉除尘废水含铜沉降速度的因素。
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