Vigneswaran, S & Jing Song, C 1986, 'Mathematical modelling of the entire cycle of deep bed filtration', Water, Air, and Soil Pollution, vol. 29, no. 2, pp. 155-164.
View/Download from: Publisher's site
View description>>
This study proposes a mathematical model which was developed from the 'O'Melia-Ali' and 'Adin-Rebhun' models, to describe the entire filtration cycle. The three coefficients appearing in this model were calculated for different operating conditions using 30 cm depth filter experiments. The concentrations and headloss profiles simulated for different filter depths using these coefficients were found to fit very well with experimental results. © 1986 D. Reidel Publishing Company.
Vigneswaran, S & Setiadi, T 1986, 'Flocculation study on spiral flocculator', Water, Air, and Soil Pollution, vol. 29, no. 2, pp. 165-188.
View/Download from: Publisher's site
View description>>
Traditionally, the Jar Test has been used to assess the suitability of flocculation treatment for a given raw water. Unfortunately, the Jar Test suffers from a number of disadvantages. The new method of assessment of flocculation, Spiral Flocculator, has been claimed to be a better method than the Jar Test apparatus and a good method for continuous assessment of flocculation. This study compares the performance of Spiral Flocculator and Jar Test, and mathematical modeling of the Spiral Flocculator performance. The experiments conducted reveal that the Spiral Flocculator has a better effective energy dissipation compared to that of Jar Test. However, the size of flocs in Spiral Flocculator seems to be overestimated relative to the real flocculator and Jar Test. © 1986 D. Reidel Publishing Company.
Vigneswaran, S & Setiadi, T 1970, 'SPIRAL FLOCCULATOR: MATHEMATICAL MODELLING AND EXPERIMENTS.'.
View description>>
Spiral flocculator has been claimed to be a good method for continuous assessment of flocculation in water treatment plant, and overcome most of the limitations experienced in jar test procedure. This paper deals with the mathematical modelling of spiral flocculator performance. The effluent turbidity, and temporal variation of floc size and floc density were related to the velocity gradient and influent concentrations. These formulations were then verified with the experimental results obtained from the laboratory-scale spiral flocculator experimental study. The experimental study also revealed that the spiral flocculator has a better effective energy dissipation compared to that of jar test although the size of flocs in spiral flocculation seems to be overestimated relative to the real flocculator.
