| Author | Kim, Houng-seob |
| Call Number | AIT Thesis no.EV-92-06 |
| Subject(s) | Sewage lagoons
Sewage--Purification--Biological treatment
|
| Note | A thesis submitted in partial fulfillment of the requirement for the degree of Master of science |
| Publisher | Asian Institute of Technology |
| Abstract | Waste stabilization ponds (WSP) may be affected by toxic compounds which
inhibit bacterial activity and reduce the rate of biodegradation of organic matter.
Research was conducted to evaluate the toxic effects of phenol in the laboratory-scale
and pilot-scale WSP.
The laboratory-scale WSP System I units, consisting of facultative pond l,
facultative pond 2 and maturation pond in series, were fed with different influent
phenol concent r ations of 300, 500, 600 and 700 mg/L, but the same organic loading
rate of 1000 kg COD/(ha.d) to the facultati ve pond 1. System II consisting of
facultative pond 2 and maturation pond in series were fed with t h e same waste
as System I, but the organic loading rate of 250 l<g COD/(ha.d) was applied to the
facultative pond 2.
Data from this study showed that soluble chemical oxygen demand (SCOD)
removal efficiencies in the WSP were found to decrease with increasing influent
phenol concentrations. At influent phenol concentrations of 300, 500, 600 and 700
mg/L in the facultative pond 1 of System I and facultative pond 2 of System II,
the SCOD removal efficiencies were 55, 40, 37 and 25 percent for the facultative
pond 1 of System I, and 80, 63, 58 and 55 percent for the facultative pond 2 of
System II, respectively. However in the facultative pond 2 and maturation pond of
System I and in the maturation of System II, the SCOD removal efficiencies were
not much affected by the influent phenol loadings.
Chlorophyll g concentrations were found to decrease with increasing influent
ph enol concentrations in the facultative pond 1 of System I and facultative pond
2 of System II. However, in the facu ltative pond 2 and maturation pond of System
I and maturation pond of System II, the toxic effect of phenol was not much evident.
Phenol shock loading of 500 mg/L, applied for one day to the pilot-scale WSP,
chlorophyll .a resulted in the decrease of the pilot-scale facultative pond 1 unit
while in the pilot-scale facultative pond 2 and maturation pond, the chlorophyll
£!: was not a ffected much.
Peak phenol concent1·ations in the pilot-scal e facultative pond 1 and facultative
pond 2 appeared about one day after shocl< loading, being 47 and 16 mg/L. No
phenol was found in the pilot-scale maturation pond effluent. |
| Year | 1992 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. EV-92-06 |
| 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 (EEM) |
| Chairperson(s) | Chongrak Polprasert |
| Examination Committee(s) | Verink, Johan;Fujii, Shigeo;Bhattarai, Kiran |
| Scholarship Donor(s) | Government of the Federal Republic of Germany(DAAD) |
| Degree | Thesis (M.Sc.) - Asian Institute of Technology,1992 |
