The development trend of studies on functional fertilizers of lignin is reviewed with this paper.

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;

Recovery of acetic acid from process of waste solution;

The chemical composition of the waste solution from which rhenium is I‘ecovel‘ed,procedures of recovering and some important points for applying the procedures are described.

In Japan,the organic components of waste solution of molasses al cohol were transformed into humic acid and further pro-duced into fertilizer co ntaining over50%organic substance.

Study on producing CuO from deposited-copper etching solution and recycling conditions of wastewater;

Analysis of biochemical methane potential in anaerobic biodegradation of molasses alcohol wastewater;

The internal electrolysis method with ferromanganese ore and activated-carbon supported copper catalyst was designedto promote the oxidation of organic pollutantsin wastewater fromthe molasses alcohol industry.