| Title |
Milky Waste Treatment in Enhanced UASB ( EUASB ) Reactor |
| Authors |
민경석 ; 안영호 ; 남광현 ( Kyung Sok Min ; Young Ho Ahn ; Kwang Hyun Nam ) |
| Abstract |
In application of enhanced UASB(EUASB) reactor using fat-free milky waste(carbohydrate:protein=60:40) as substrate, degradation of carbohydrate showed priority as compared with that of protein. In HRT 20hrs, maximum SCOD removal was 92% at organic loading rate of 8 ㎏COD/㎥/d. For SCOD removal of 80% over in HRT 10hrs, allowable organic loading rate was to 20㎏COD/㎥/d and then, methane production was 0.27 ℓ CH₄/gCOD-(rm). Enhanced UASB reactor showed phase separation in hydrogen partial pressure phase, but at the lower sludge bed zone, nitrogen utilization was different with that of l00% carbohydrate. It might be due to deamination stage of protein. At the upper sludge bed and blanket zone, it could be found autolysis of organisms except for substrate as well as deamination process. Morphological characterization with SEM showed that biopellets with milky waste was less uniform and packed loosely. These characteristics might be due to deficient condition of directly utilizable nitrogen for production of extracellular materials as well as utilization priority between carbohydrate and protein involved in substrate. |