Flocculation performance of a novel synthesized flocculant with low ecological risk.
Combined flocculants with low ecological risk are urgently required in water supply and wastewater treatment in China. A novel flocculant was thus developed under the condition of low ecological risk (noted as CAS). The experiments to examine wastewater treatment performance of the new product showed that there was favourable performance in the flocculation process in contrast to commercial flocculants in treating kaolin suspensions, municipal effluent and domestic wastewater. Flocculation performance included the turbidity removal rate, sediment character and a decrease in COD (chemical oxygen demand). The sediment time of flocculation is short and the removal rate of turbidity treated by CAS is high compared with PAC (polyaluminum-chloride), PAM (polyacrylamide) and the combined addition of PAC and PAM. The optimal concentration required to affect flocculation processes is dependent on kaolin concentration and the character of the wastewater within the range examined. It also showed that CAS is effective to treat wastewater with high turbidity.
Zhang
Kai-song
KS
Key Laboratory of Terrestrial Ecological Process, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China.
Zhou
Qi-xing
QX
Xiao
Hong
H
D002681:China; D003102:Colloids; D004463:Ecology; D005427:Flocculation; D019015:Geologic Sediments; D018570:Risk Assessment; D014865:Waste Disposal, Fluid / Q000379:methods*; D014872:Water Movements
D003102:Colloids