摘要
In this paper,the power law of particle size distributions (PSDs) in conventional water treatment processes is developed. After measuring the particle size distributions of raw-water,settled water and filtered water,a mathematical model between particle diameter and the amount of particles was studied. The value of collision frequency factor β in the PSDs model can be used to represent the collision behavior of particles ,and can be used as foundation exponent to choose suitable coagulation to accelerate particles aggregation. At the same time,the relationship between the value of parameter K and the total particles volume V was deduced. K is defined as particle volume exponent,which can represent the total volume of particles. The degression degree of K shows the removal efficiency of potable water treatment units.
In this paper, the power law of particle size distributions （PSDs） in conventional water treatment processes is developed. After measuring the particle size distributions of raw-water, settled water and filtered water, a mathematical model between particle diameter and the amount of particles was studied. The value of collision frequency factor micro-particles; particle size distributions （PSDs） ; particles collision frequency factorβ ; particle volume exponent K in the PSDs model can be used to represent the collision behavior of particles , and can be used as foundation exponent to choose suitable coagulation to accelerate particles aggregation. At the same time, the relationship between the value of parameter K and the total particles volume V was deduced. K is defined as particle volume exponent, which can represent the total volume of particles. The degression degree of K shows the removal efficiency of potable water treatment units.
基金
Sponsored by the National Basic Research Program of China(973)(Grant No.2004CB41850)
the Natural Science Foundation of Heilongjiang Prov-ince(Grant No.E200609)
