By means of modeling prediction and a lab-scale experiment,we tested bio-P removal by chemical-P precipitation in the side-stream of anaerobic digester supernatant.

Then the effluent that had been treated by two-phase anaerobic was disposed by MAP chemical precipitation method.

On the basis of the basic principle of chemical sedimentation process, the chemicalsedimentation process that treats sulphide in acetylene sludge wastewater using FeSO.

Recovery of magnesium ammonium phosphate from ammonia nitrogen wastewater by chemical precipitation;

Production of ZnS from flue gas SO_2 through the combined processes of microbial transformation and chemical precipitation;

Mathematical model for treating electroless nickel plating wastewater by chemical precipitation and its application;

SO42-was removed by the chemical deposition techniques,and COD was then removed by the batch Anaerobic Hydrolysis-acidogenesis-Aerobic biotechnology which was performed under different influent organic loads adjusted by changing HRT and MLSS.

Pilot scale and lab scale experiments were conducted to pretreat the ion exchange wastewater (the main part of the monosodium L glutamate (MSG) wastewater) by means of Fe C deoxidization to increase the pH and biodegradation, lime counteraction and aeration by air or chemical deposition to remove ammonia.

The paper introduced the method and the theory of Lead Sulfide film preparation——Chemical Deposition and analyzed the reason of outshoot cling to the surface of Lead Sulfide film during the process of chemical deposition.