Three no addition method,no addition of flavour and flavouring composition,no addition of sweeteners and no addition of purification agents,is the key point of quality control of Shede and Tuopai liquors.

This paper makes a general review of the basic principle, technical characters, applied fields,technical state and developing tendency of the optical technology of sizing particle impurity in ultrapure mediums.

The requirements are very strict to the thin-wall welding pipe for delivering medical distilled water, injection liquid and other pure medium.

Research progress in photoreactors for water purification;

Preparation of powder activated carbon by rice husks and application in water purification;

A numerical simulation of water purification in closed harbor;