Surimi processing wastewater treatment through combined anaerobic filter and partial nitrification process | |
| Author | Sawanya Laohaprapanon |
| Call Number | AIT Thesis no.EV-07-43 |
| Subject(s) | Seafood industry--Waste disposal Sewage--Purification--Nitrogen removal |
| 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 | Pilot scale activated sludge process with partial nitrification (AS/PN) was developed for treatment of a surimi processing wastewater. The treated wastewater from anaerobic filter was diluted with tap water until the concentration of chemical oxygen demand (COD) was around 600 mg/L and ammonium nitrogen concentration was around or higher than 350 mg N/L. Ammonium chloride was added into the diluted wastewater if its ammonium nitrogen was lower than 350 mg N/L. Then, it was fed continuously into the reactor which was operated under ambient temperature of approximately 29 °C, pH ranged between 7.7 and 8.2, and sludge retention time (SRT) was within 4 to 5 days. The effect of DO concentration on the partial nitrification was investigated. At the controlled DO concentration of 0.5 to 0.7 mgO2/L, the process could produce a ratio of nitrite to ammonium nitrogen 1:1 which suited to feed the Anmmox process. Cost - benefit of AS/PN process was assessed for treating surimi wastewater with ammonia nitrogen load of 2.2 kg N/m3d. The results showed that AS/PN process was more economical compared to combined activated sludge process with completed nitrification. The AS/PN process saved the investment costs approximately 20 % and 17 % of operating and maintenance costs. Cost of aeration was saved by approximately 31 %. Furthermore, it is possible to couple AS/PN with Anammox process which lead to a sustainable process by treating high ammonia load and 100% savings on addition of external carbon source (methanol) |
| Year | 2007 |
| 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) | Annachhatre, Ajit P. |
| Examination Committee(s) | Visvanathan, C;Preeda Parkpain |
| Scholarship Donor(s) | Royal Thai Government Fellowship |
| Degree | Thesis (M.Sc.) - Asian Institute of Technology, 2007 |