The technology of managing the pollution of black-liquor of straw pulping in paper-making is a hot point in China's water pollution controlling research.

It is fine white nontoxic and no curing pollution with specific gravity of 1.08. It can slightly dissolve in hot ethanol, but not in water.

Using condensation heat from centralized air-conditioning system for preparing domestic hot water has a remarkable economy, and can save energy and reduce thermal pollution to environment.