TY  - SER
AU  - Kamonkarn Prikyai
AU  - Visvanathan,C.
AU  - Rene,Eldon R.
AU  - Ekbordin Winijkul,
AU  - Shipin,Oleg V.
ED  - Royal Thai Government Fellowship,
TI  - Performance of air membrane bioreactor for gas phase methanol removal under steady and transient state conditions
T2  - Thesis
PY  - 2019///
CY  - Pathum Thani, Thailand
PB  - Asian Institute of Technology
KW  - Membrane reactors
KW  - Bioreactors
KW  - Waste gases
KW  - Recycling
N1  - A thesis submitted in partial fulfillment of the requirements for the  degree of Master of Science in  Environmental Engineering and Management; Thesis (M.Sc.) - Asian Institute of Technology, 2019
N2  - The requirement of high surface area and rapid clogging of biomass is the major limitation  of the conventional biological waste gas treatment. Whereas in an air membrane bioreactor  (aMBR), these limitations can be easily overcome. The large gas-liquid surface area of air  membrane bioreactor can enhance the mass transfer of pollutants and oxygen. It can operate  under high inlet loading rate within a small compact reactor. A laboratory scale aMBR was  evaluated for the removal of gas phase methanol from air. This research also studied the  biodegradability of methanol by C. boidinii in the batch test. The result showed that the  concentration of methanol decreased over time. The specific substrate utilization rate  (SSUR) was 645 ug CH30H/g biomass·h. The system was loaded in the range between 2.5-  30 g m" of MeOH. Meanwhile, the performance of aMBR at different empty bed residence  times (EBRT) of 30, 10 and 5 s was assessed. The maximum 98 % of removal efficiency  (RE) at the inlet loading rates (ILR) up to 1,953 g rn" h were achieved at EBRT 30 s. The  maximum elimination capacity (EC) of 8,644 g m' h' was observed when the system was  operated at ILR ~ 9,353 g m-3 h' (RE 92 % at 30 s). The possibility of aMBR to deal with  an upset situation was investigated under transient condition. Experimental results showed  that the system can handle the fluctuation ofMeOH due to the results of only 5-10 % ofRE  dropped during the shock load test. After that, MeOH removal could be restored within 1 -  2 days. Moreover, the results from High-Throughput Sequencing process showed the variety  of microbial community structure which was distributed to the different times. Candida  boidinii, Fusicolla merismoides and Xantobactor jlavus played important roles in the  biodegradation of MeOH. All of these results show that MeOH waste gas was effectively  degraded in this aMBR application.
UR  - http://203.159.5.9/ait-thesis/detail.php?q=B05736
ER  -