| Title |
Attachment Characteristic of Biofilm in Fixed Lock Media for Piggery Wastewater Treatment |
| Authors |
임재명 ; 권재혁 ; 이정환 ( Jay Myung Rim ; Jae Hyouk Kwon ; Jeong Hwan Lee ) |
| Abstract |
A correlation between the biofilm thickness and biomass density in a laboratory-scale submerged media aeration system was evaluted. The laboratory unit had Saran Lock^((TM)) media and the piggery wastewater was used as a substrate. The influent wastewater had COD and BOD concentration of 2,940 to 3,800 ㎎/ℓ and 1,310 to 1,730㎎/ℓ, respectively. HRTs of the laboratory unit were varied from 0.5 to 2 days. Following conclusions can be drawn from the operational results : ⅰ) the maximum biofilm density of 130㎎/㎤ was observed at biofilm thickness of 180 to 200 ㎛ ranges. ⅱ) The active biomass content represented as VSS per unit aera was increased up to 10 days of operating time. ⅲ) The COD removal rate was rapidly increased up to the 200 ㎛ of biofilm thickness, however no further increment of COD removal rate was observed between 200㎛ to 1,200㎛ of biofilm thickness. |