Study on the treatment of waste sulphuric acid in steel works by single-pipe filling rising film condensability and crystal desalination;

Using the wastewater from a piggery in Haidian,experiments on aeration and crystallization are carried out at normal temperature under anaerobic-improved A2/O process.

Studies of desalting ability and desalting structure in Karelinia caspica;

To avoid harm of sodium carbonate accumulating in circle mother liquor on alumina production,the effection of Na2OK concentration in mother liquor and removal salt temperature by crystallization on sodium carbonate solubility in evaporation mother liquor has been experimented.

In order to improve the crystallization rate of KNO_3,the new process for the production of KNO_3 by salting-out crystallization method is studied e.

Effects of salt crystallization of Na_2SO_4 and NaCl on concrete exposed to drying-wetting cycles were investigated by using index including concrete scaling amount,concrete expansion rate and strength loss rate,and chemical attack of concrete soaked in Na_2SO_4 and NaCl solutions was also measured.

The physical deterioration mechanism,characteristics salt,experimental methods,appraisable index and main influencing factors of soluble salt crystallization corrosion to concrete reviewed.