[Experiment and model simulation of suspended solids in Taihu Lake under wind-wave disturbance].

The bottom mud in Taihu Lake was simulated indoors in a wave tank. The rules of starting principle of the bottom mud were analyzed under different kinds of disturbing intensity in this paper. The common wave intensity of Tai Lake could be systematically simulated in the wave tank.

[Elasticity plastic filler for purification of polluted streams in situ entering lake].

The biofilm process using a new-type elasticity plastic filler was adopted in a typical polluted stream entering the Tai Lake (the Linzhuanggang). The experiments at pilot scale ran for about 0.5 years.

[Simulation and model computation on dynamic release of nutrition factors of bottom mud in Taihu Lake].

The dynamic release of bottom mud in Taihu Lake was simulated indoors in an annular tank. The rules of starting principle, resuspension and release rate of bottom mud were analyzed under different kinds of disturbing intensity. The velocity of flow was basically uniform in the annual tank.

Distribution of extractable fractions of heavy metals in sludge during the wastewater treatment process.

Sludge samples were collected from different treatment steps of Gaobeidian wastewater treatment plant (WWTP) of Beijing City, PR China, to investigate the distributions of total and chemical fractions of Fe, Mn, Ni, Cu, Zn, Cr, Pb, and Mo in different sludges. The highest total concentrations were found for Fe, Mn, Pb, and Mo in digested sludge (DS), Ni and Cr in thickened sludge (TS), Zn in dewatering sludge (DWS), and Cu in active sludge (AS). The lowest concentrations were observed in AS, except for Cu in TS.