| Author | Hou, Shan-lin |
| Call Number | AIT Thesis no.EV-90-1 |
| Subject(s) | Sewage--Purification
|
| Note | A thesis submitted in partial fulfillment of the requirements of Master of Engineering, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Abstract | In this study field sampling , laboratory analysis and
computer programming had been conducted to perform the objectives
of this study. Two field samplings were made in the month of
July and November ,1988. Twenty-eight physical and chemical
parameters were selected for water and wastewater characteristics
determination. Most of the parameters were within acceptable
range of effluent standard except some parameters such as
hardness sulfate and Cd.
The result shows that the hardness value in
13150 - 5900 mg/las CaC031 is too high to be used
khlong water
for cooling
purpose. Ion exchange , lime/soda ash process and caustic soda
softening were found feasible to lower down the hardness value to
acceptable level. The cost of caustic soda softening was found
to be the cheapest one among these methods. The cost of ion
exchange softening was the most expensive but the hardness
removal efficiency was also the highest.
The sulfate cone. was also too high( 2300-· 36001 to be used
for cooling purpose. The chemical precipitation by BaC12 was
found efficient for sulfate removal. The cost of sulfate removal
was found 114 B for m"3 water treatment.
The Cd cone. in the effl11ent of ash handling system was
found higher than the effluent standard. rt was found feasible
to remove the Cd from this wastewater by PAC (powdered· activated
carbon!. The results of Cd removal by PAC which were conducted
by jar tests showed that with the optimum mixing speed I 150 rpm)
optimum contact time ( 15 mini and optimum PAC dosage I 25 g/11
BO. 5 % Cd removal could be achieved.
The
conducted
diffusion
The application of one dimensional water quality was conducted
by a mathematical program named MATH CAD. The
coefficient of the Khlong Pakasai was found as 58. 726 km"2/day.
|
| Year | 1990 |
| Type | Thesis |
| School | School of Environment, Resources, and Development (SERD) |
| Department | Other Field of Studies (No Department) |
| Academic Program/FoS | Environmental Engineering and Management (EV) |
| Chairperson(s) | Samorn Muttamara |
| Examination Committee(s) | Tran, Francis T. ;Vigneswaran, Saravanamuthu
|
| Scholarship Donor(s) | Chinese Petroleum Corporation , R. 0. C. |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1990 |