Archive for September 2018

　　When polyacrylamide is used, the biggest problem encountered is the dissolution time of product, because poor dissolution can affect the using effect directly and may block the adding equipment. Therefore, dissolution time is the second index specified in the national standard. General hydrolysis product is easy to dissolve within 60—120 minutes, and nonionic product, 90—120…

Large quantities of sludge shall be produced after sewage is subject to sediment treatment. Even though the sludge is treated by means of concentration and digestion, the water content is still as high as 96%, and the volume is too big to be digested and disposed. So it must undergo dewatering treatment to increase the…

Usually polyacrylamide solution is prepared by means of mechanical mixing. The mixing speed has great influences on the preparing time of the solution. However, too fast a speed shall cause degradation of polyacrylamide and part of polyacrylamide long chains shall break and influence sediment effect, so the mechanical mixing speed must be controlled strictly. The…