| Author | Jeyaranie, N. |
| Call Number | AIT Thesis no.EV-93-14 |
| Subject(s) | Sewage--Purification--Mathematical models
|
| Note | A thesis submitted in partial fulfillment of the requirement for the degree of Master of
Engineering |
| Publisher | Asian Institute of Technology |
| Abstract | A mathematical model is newly developed in order to improve the wastewater quality
indices with the addition of the alkalinity variable, some reaction rate equations and the
movement of sediment. The input water quality parameters which describe the characteristics
of the wastewater are first estimated from the available data from INAGA WA report, 1982.
The numerical solutions of the 1st order difference method is modified and improved by the
central order difference method. From this numerical solution we can get better results
compared to the 1st order difference method. After the modification of the model the
coefficients are adjusted until the simulated data are reasonably matched with the observed
data.
Results from this investigation indicate that the model gives very satisfactory
reproduction of water qualities and the removal efficiency of the sediments and BOD. From
the sensitivity analysis the mathematical model is sensitive to all the reaction rate
coefficients.
The main inputs for the mathematical model is the dimension of the rock-bed reactor,
initial porosity, flow rate, and influent water quality indices such as POM, ISS, DO, DOM,
NH4 + - N, NO3- - N, and Alkalinity. The model evaluates the effluent water quality indices
and sediment of organics in sediment and inorganics in sediments, VSS and SS. From these
results the removal efficiency can be calculated. From that results it can suggest, whether this
type of reactor is applicable or not for particular influent concentration. |
| Year | 1993 |
| Type | Thesis |
| School | School of Environment, Resources, and Development (SERD) |
| 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) | Fujii, Shigeo; |
| Examination Committee(s) | Chongrak Polprasert;Visvanathan, C.; |
| Scholarship Donor(s) | Government of Norway; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1993 |