The use of urban sewage can not only produce a large amount of methane gas for power generation,or as a source of heat supply for the residents to clean up after the inflow of sewage can also be piped back to neutral water for environmental water,wash water,the remaining biogas as an agricultural fertilizer.

Different kinds of dispersants were tested and the carbon black dispersion for gel ink was prepared.

This paper analyzes the connection between dye decentralization and stability of gel ink, expounds the stability mechanism of gel ink, plus, it excogitate an experiment methods which could accurately evaluate the stability of gel ink at short notice.

China is the largest producer of Gel ink ball-point pen, with its output in recent years has been ranking first in the world, but this should be a relatively neutral pen manufacturing is the core material - Gel-ink still rely mainly on imports.

The rheological properties of carbon black gel ink were investigated by measuring of the relationship between shear-stress and shear rate.

TiO_(2)/carbon photo-catalysts are prepared by sol-gel heat and supercritical fluid drying methods from TiCl_(4) and aqua-mesophase The samples are characterized in terms of XRD and TEM techniques.