Study on reuse and treatment of tannery chrome effluents
制革厂铬鞣废水中铬的回收处理研究

For the problems such as high content of chromium(Cr~(3 )),complex composition and poor purity after precipitation in tannery chrome effluents,optimized direct alkaline chemical precipitation,alkaline chemical precipitation after flocculation and new method of silicon-ferroalloy were used to recycle chrome of tannery chrome effluents in the experiment.The purity of chromium sludge was more than 36%,65% and 80% respectively after the treatment by the above three methods,about twice as much as original purity(27.7%) of chromium sludge.