[TTC-ETS activity monitoring of A2/O process for combined sewage treatment].

The influences of variations of temperature and F/M on the TTC-ETS activity have been experimentally studied. The correlation between TTC-ETS activity and COD degradation was also analyzed. Comparing TTC-ETS activities with physical and chemical indexes when high C/N ratio impacted A2/O process, the advantages and disadvantages of using TTC-ETS activity to characterize the status of A2/O process were illustrated.

[Relation analysis of phosphorus removal and BOD5 loading using PHB monitoring in A2/O process].

In a pilot-scale anaerobic-anoxic-oxic experimental system for municipal wastewater treatment, PHB consumption in an oxic tank and PHB production in an anaerobic tank had been monitored overtime, and relations among PHB consumption/production, phosphorus removal/release and BOD5 loading had been analyzed. The results indicated that the consumption of PHB was positively related with phosphorus removal, and about 140 mg PHB consumption could result in 1 mg P removal. In the anaerobic tank, about 1.

[Evaluation of the damaging effect of dyestuff on Phanerochaete chrysosporium with amplified fragment length polymorphism (AFLP) analysis].

The AFLP analysis was carried out in order to evaluate the DNA damaging effects of dyestuff of different concentrations on Phanerochaete chrysosporium. The DNA similarity and UPGMA cluster analysis were conducted to determine the relationships between the concentrations of dyestuff and DNA damaging effects. The results showed that the AFLP analysis could reflect the polymorphisms of DNA well, and the primer pairs E-AAC/M-CAA could give more amplified DNA fragments than others primers.

[Experimental study on the processes and mechanism of enhanced denitrification by addition zeolite in wastewater treatment].

Aim to enhance nitrogen removal from wastewater, addition zeolite to aeration tank was preformed. The result showed that addition of zeolite could improve the nitrification/denitrification efficiencies by comparing two phase experiment of 25 mg/L with blank and 25 mg/L with 50 mg/L, and the population of nitrifying bacteria in activated sludge increased obviously. When 25 mg/L zeolite was added into aeration tank, NH4(+) -N and TN removal increased 10% - 13% and 13% respectively, endogenous respiration rate of nitrification increased about 138%, and the population of nitrification bacteria increased about 2.