Study on the removal efficiency of different flocculants on sand-containing wastewater
In the existing process of sewage treatment plant,the grit chamber has the problem of difficult removal of fine inorganic sand particles.Chemical flocculation was used to remove fine sand.The treat-ment effects of inorganic flocculant,synthetic organic polymer flocculant and natural organic polymer floc-culant on simulated wastewater with low and high sand content and raw water of sewage treatment plant were introduced.The result showed that the use of chitosan(CTS)as a single flocculant had a better re-moval effect on the sand content of the supernatant of each wastewater and the suspended solids with a particle size greater than 50 μm.The sand content of the supernatant of simulated wastewater with low and high sand content decreased from 130 mg/L to 31.8 mg/L and 240 mg/L to 31.3 mg/L,respectively,and the removal rate reached 75.5%and 86.9%,respectively.
万方数据
