Study on citric acid fermenting conditions of waste liquor after Dioscorea zingiberensis extrcting diosgenin;

Discharging of waste liquor from chelating ion-exchange resin tower;

In the process of preparation of boracic acids by using one step method,the waste liquid and waste residue were generated;if they were discharged directly,it would destroy the environment seriously;so the recycle and utilization of the boracic acid waste liquor and residue were discussed.

Exploration on opening experiment teaching of the treatment of waste liquid from chemical laboratory offering for normal college students;

Research on the recycle of waste liquid coming from the purification of acetylene and its application;

Study on extraction of 2-naphtol from waste liquid in pharmaceutical plants;