Influence of particle size on coagulation | |
| Author | Cornillez, Lidany Fuenteblanca |
| Call Number | AIT Thesis no. EV-79-11 |
| Subject(s) | Particles Coagulation |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Environment, Resources and Development |
| Publisher | Asian Institute of Technology |
| Abstract | Particle size as a major parameter involved in coagulation had been investigated using the jar test, basing mainly to its effect on the basic parameters such as coagulant dose,-pH, mixing speed and time, and settling time. Turbidity level was varied into 3 specific levels, 200 J.T.U., 100 J.T.U., and 50 J.T.U. with an artificial sample of kaolin-tap water. Particle size was fractioned by centrifugation with time 35 min., 20 min. and 5 min. at a constant speed of 2000 rpm and which by Breed Count Method have given particle size range of 0.8-2.0 µ, 0.09-0.7 µ, and 0.01-0.08 µrespectively Particles of larger size considerably performed better with lower alum dosage than with smaller particle size. As the particle size was decreased there was a slight increased in the coagulant demand. However, larger particle size formed 'larger floes which settled down quickly than the smaller particle size. With respect to mixing, prolongation of mixing more than its optimum value correspondingly decreased its percent removal. This could be explained from the fact that it causes· the particles to be broken-down thus increasing the number of particles to engage in the actual aggregation of particles for a complete coagulation and thereby producing inefficient turbidity removal. It was also observed that smaller particles coagulated faster. |
| Year | 1979 |
| Type | Thesis |
| School | School of Environment, Resources, and Development |
| Department | Department of Energy and Climate Change (Former title: Department of Energy, Environment, and Climate Change (DEECC)) |
| Academic Program/FoS | Environmental Engineering and Management (EV) |
| Chairperson(s) | Samorn Muttamara ;Chongrak Polprasert |
| Examination Committee(s) | Nguyen, Cong Thanh ; |
| Scholarship Donor(s) | Federal Republic of Germany |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1979 |