Improve Niche Colonization and Microbial Interactions for Organohalide-Respiring-Bacteria-Mediated Remediation of Chloroethene-Contaminated Sites.

Organohalide-respiring bacteria (OHRB)-mediated reductive dehalogenation is promising in bioremediation of chloroethene-contaminated sites. The bioremediation efficiency of this approach is largely determined by the successful colonization of fastidious OHRB, which is highly dependent on the presence of proper growth niches and microbial interactions. In this study, based on two ecological principles (i.

Comparison of the MBBR denitrification carriers for advanced nitrogen removal of wastewater treatment plant effluent.

The moving bed biofilm reactors (MBBRs) were used to remove the residual NO3(-)-N of wastewater treatment plant (WWTP) effluent, and the MBBR carriers for denitrification were compared. The results showed that high denitrification efficiency can be achieved with polyethylene, polypropylene, polyurethane foam, and haydite carriers under following conditions: 7.2 to 8.

[Pretreatment of high-concentration acrylic acid wastewater by the multi-stage microaerobic biological fluidized bed reactor].

A multi-stage microaerobic biological fluidized bed reactor was used for the pretreatment of synthetic wastewater containing high concentration of acrylic acid (AA). The effect of influent load was investigated and the intermediate products of acrylic acid degradation were analyzed. It indicated that the removal rate of AA was above 95% with effluent acrylic acid less than 150 mg x L(-1) and COD removal rate of 15%-30%, under the following conditions: hydraulic retention time of 12 h, waste water temperature of 25 degrees C, influent acrylic acid concentration of 3 000-9 000 mg x L(-1), volume load of 6.

[Discussion of protective mechanism of Lyceum barbarum polysaccharides on ovarian tissue in female senile rats].

Objective: To study the protective mechanism of Lyceum barbarum polysaccharides (LBP) on ovarian tissue in female senile rat.

Methods: Senile rats of 14 months old were divided randomly into model group, positive drug group, LBP low dosage group, LBP medium dosage group and LBP high dosage group. SD female rats of 4 months old formed a youth group.

[Treatment of acrylate wastewater by electrocatalytic reduction process].

High-concentration acrylate wastewater was treated by an electrocatalytic reduction process. The effects of the cation exchange membrane (CEM) and cathode materials on acrylate reduction were investigated. It indicated that the acrylate could be reduced to propionate acid efficiently by the electrocatalytic reduction process.