06:09
The Papermaking Industry: Kraft Pulping
In the Kraft process, making pulp begins by conveying wood chips of uniform size into a vessel called a digester. Once the pulp-making process is complete, the pulp is transformed into paper. However, not all mills make both pulp and paper at one ...
04:39
Biological Treatment Technologies: Biological Treatment, Wastewater and Sewage
Biological treatment is a major application of microbial technology used for treating municipal wastewater and sewage. One of the most important biological treatment processes is anaerobic digestion, in which anaerobic bacteria are placed in huge c...