| Author | Wilasinee Yoochatchaval |
| Call Number | AIT Thesis no.EV-04-24 |
| Subject(s) | Sewage--Purification--Nitrogen removal
|
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Environment, Resources and Development |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. EV-04-24 |
| Abstract | This study was conducted to investigate the feasibility of using combined Sharon (Single
reactor system for High Ammonium nitrogen Removal Over Nitrite) and
Anammox(ANaerobic AMmonium OXidation) process for wastewater nitrogen removal.
The main objective is to study the nitrogen removal at various operating parameter such as
loading rate, oxygen feed ratio and HRT. The experiment used silicone hollow fiber
membrane module for supply of oxygen gas because it has the biggest gas permeability
besides its exellent heat-resisance, toughness, resilience and long-life.
In the experiment, five-liter reactor and silicone hollow fiber membrane module were
operated. Synthetic wastewater was fed continuously for 4-5 months with the variation of
• Ammonium nitrogen concentration; 50mg/L, 60mg/L, 70 mg/L,80 mg/L and90
mg/L
• Oxygen feed ratio, 1:14, 1:19, 1:9, 1:6, 1:11and1:3.8
• HRT, 1 day and 2 days
The controlled parameters in this experiment were pH, alkalinity and dissolved oxygen
concentration. pH and alkalinity were controlled by adding bicarbonate contents.
Alkalinity concentration in this experiment depended on the concentration of ammonium
nitrogen. Dissolved oxygen concentration could be controlled by oxygen flow rate that was
pumped to the hollow fiber membrane module, wastewater circulation flow rate and
oxygen feed ratio. Dissolved oxygen concentration was kept at 0.5-1.0 mg/L.
It was found that at the optimum ammonium nitrogen loading rate is 60-70 mg/L·d and the
oxygen feed ratio should be 1:11. The suitable HRT is 1 day. The maximun nitrogen
removal is 63.85% because the nitrification process was occurred in silicone hollow fiber
membrane module reator.
|
| Year | 2004 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. EV-04-24 |
| 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) | Annachhatre, Ajit P. |
| Examination Committee(s) | Preeda Parkpian;
Satoh, Hiroyasu |
| Scholarship Donor(s) | Royal Thai Government Fellowship |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2004 |