| Author | Tatchai Pussayanavin |
| Call Number | AIT Thesis no.EV-11-22 |
| Subject(s) | Waterborne infection--Risk assessment--Tropics
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| Note | A thesis submitted in partial fulfillment of the requirements for the degree of master of science in environmental engineering and management |
| Publisher | Asian Institute of Technology |
| Abstract | The treatability of polyethylene terephthalate (PET) processing wastewater in lab-scale continuously feed up flow anaerobic sludge blanket (UASE) reactor was investigated in order to evaluate of process performance under different organic loading rates (OLRs). The specific objective of this research was to study the effect of the dissolved antimony in PET wastewater in term of the antimony removal in process, effect on a UASB reactor and potential mechanisms of antimony removal by microorganism. The experiment set up by the reactor size was 5.4 L and operated under ambient temperature. The reactor was seeded with sludge obtained from the UASB unit from the beer industry. Antimony in this research which was uncontrolled concentration in raw wastewater was directly feeding to UASE process. The results showed of the performance of a lab-scale UASB reactor fed PET processed wastewater was investigated under organic loading rates (OLR) ranging from 0.4-15.8 kg COD/m³ .d. The UASE reactor was investigated to work and a primary treatment with typical COD removal efficiency of 55-75%. Moreover, at high level of antimony concentration in feeding wastewater caused a reduction in the chemical oxygen demand removal and biogas production which was reversed when the metal dosing more than 800 ppb. The effects of microorganism from antimony toxicity were compared with value Microtox test in previous research. the reactor presents an average removal of 67% antimony from wastewater. Potential mechanisms for removal antimony in the system were interacting with metals through "Biosorption" which was consisted of "Bio-adsorption" in their cells' walls and "Bioaccumulation" in the intracellular accumulation. The amount of antimony removed through bioaccumulation and through bio-adsorption by sludge granule was appoximately 54% and 46% at 280 day, respectively. The highest amount of antimony from biosorption mechanism was observed at 398 mg/kg. |
| Year | 2011 |
| 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 (EV) |
| Chairperson(s) | Annachhatre, Ajit P.; |
| Examination Committee(s) | Preeda Pakpian;Thammarat Koottatep; |
| Scholarship Donor(s) | RTG Fellowship;Asian Institute of Technology Fellowship; |
| Degree | Thesis (M.Sc.) - Asian Institute of Technology, 2011 |