Polymer/Ceramic Composite Membranes for Oily Wastewater Treatment
碩士 === 嘉南藥理大學 === 環境工程與科學系 === 104 === The purpose of this study is to prepare a suitable ultrafiltration membrane with optimum pore size for oil/water separation via various polymers and different preparation compositions by wet phase inversion method. The water was used as coagulant and different...
| Main Authors: | , |
|---|---|
| Other Authors: | |
| Format: | Others |
| Language: | zh-TW |
| Published: |
2016
|
| Online Access: | http://ndltd.ncl.edu.tw/handle/747va5 |
| Summary: | 碩士 === 嘉南藥理大學 === 環境工程與科學系 === 104 === The purpose of this study is to prepare a suitable ultrafiltration membrane with optimum pore size for oil/water separation via various polymers and different preparation compositions by wet phase inversion method. The water was used as coagulant and different casting compositions of polymer solution were used to prepare suitable pore size composite membranes. SEM was used for surface and cross section observation of composite membrane morphology. The hydrophilicity was determined by the water contact angle measurement. The separation performances of composite membranes wereclarified by the testof ultrafiltration with high cod oil/water wastewater.
It was found that the polymer concentration and additive content in casting solution significant affected the pore size and cross section structure of prepared membranes. The cellulouse composite membrane presented a 15 L /m2hr permeation flux and permeate turbidity was 206 NTU with 10000 NTU wastewater in feed, while the preparation condition is 10 wt% cellulous content and 2.5 wt % acetone additive in casting solution membranes.Thepolysulfone composite membrane with 7.4 wt% polymer content in casting solution presented a 8 L /m2hr permeation flux and permeate turbidity was 125 NTU with 10000 NTU wastewater in feed, while the operation pressure up to 3 atm. The polysulfone/ PEG blend composite membranes showed a 11 L /m2hr permeation flux and permeate turbidity was 140 NTU with 9.6 wt % polymer and 9.6 wt% PEG content in the casting solution.
The results indicated that the polysulfone composite membranes showed the superior performance in oil/water separation with a permeation flux up to 8 L /m2hr and significant improved the turbidity and COD removal of wastewater. It is concluded that the pore size on the surface of composite membrane, operation pressure and feed temperature of UF operation dominated the separation performance of oil/water separation. The optimum surface pore properties and shear force must be superior to the transport pressure of permeate transport through the membrane to obtain a high performance oil/water separation membrane.
|
|---|