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The immobilization of lactase is a more attractive approach to overcome the disadvantage of the free lactase. In the presented work magnetic Fe304 fluid was synthesized by chemical coprecipitation and its surface was modified with sodium oleate. Then the liquid paraffin was used as dispersant and glutaraldehyde...

In sewage treatment, the sewage whose carbon and nitrogen(C/N) ratios is less than 8 is defined as low C/N ratio sewage. This study contrasts the treatment effects under different C/N ratios in aerobic membrane bio-reactor. The experiment is performed in the following conditions: Temperature is from...

Ever since practicing the policy of reformation and opening, the economic development of Guangdong province has roughly experienced the three stages: the take-off stage (1979-1991),the accelerating development stage (1992-2002) and the scientific development stage (2003-now). Guangdong Province has made...