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중공사 정밀여과막 활성슬러지법 ( ASMF ) 에 의한 생활하수의 분리특성에 관한 기초연구
박재로,지재성,김응호 ( Jae Roh Park,Chai Sung Gee,Eoung Ho Kim ) 한국물환경학회 1997 한국물환경학회지 Vol.13 No.2
The Purpose of this study is to investigate the seperation characteristics of high concentration domestic sewage using activated sludge process combined with hollow fiber microfiltration membrane and to find out the operating parameter for ASMF Process. A hollow fiber microfiltration membrane module with a pore size 0.1micron was immersed in the aeration basin(0.4㎥) and treated water was filtered through the membrane by intermittent suction with low pressure of 400mmHg(about 0.5kgf/㎠). In this experiment, various operational mode were applied to investigate stable permeate flux conditions as well as optimal suction-idle cycle and effective aeration intensity. The BOD, COD and LAS removal efficiency were higher than 85% and SS, Turbidity removal efficiency was about 100% but color removal efficiency was lower than 60%. As the results, the stable permeate flux range was 9 ℓ/ ㎡/hr∼12 ℓ/ ㎡/hr, the optimal suction-idle cycle was 10min-10min and the aeration intensity condition of 320 ℓ/㎥min was sufficient to keep both stable permeate flux and aerobic basin condition. During the experimental period, cumulating fouling and internal clogging in the membrane were inevitable to some extent. However, the optimal permeate flux, intermittent suction, and low suction pressure operation could prevent the unrecoverable fouling and dead end of operation without frequent chemical cleaning.
윤영한(Yoon Young Han),박재로(Park Jae Roh),안상우(An Sang Woo),지재성(Gee Jae Sung) 대한토목학회 2007 대한토목학회논문집 B Vol.27 No.4B
HASP공법은 표준활성슬러지공법 내 고도처리공법의 적용을 위하여 개발되었다. 본 논문은 동역학적실험을 위한 회분식 실험과 P시 하수종말처리장 내 설치한 10,000 ㎥/일 규모의 실증시설 내 실시간 운영데이터분석을 통하여 HASP 예비운전의 질소제거 특성을 파악하고자 하였다. 따라서 본 논문에서는 초기 NH₄?-N 부하의 증가를 통한 비질산화율(SNR)과 비탈질화율(SDNR)의 영향과 HASP 예비운전의 실시간 운영데이타로 부터 포기/비포기 전환속도에 따른 질소제거 특성을 파악하였다. 실험결과는 다음과 같다. (1) 질산화와 탈질산화 반응은 1차반응을 따르며, (2) 최대 SNR과 SDNR은 4.0308 ㎎N/gVSSㆍhr과 2.7852 ㎎N/gVSSㆍhr 관찰되었다. (3)실시간 운영데이타를 통한 질산화와 탈질화반응의 호기/무산소 전환속도는 질산화반응이 탈질화반응보다 빠른 것을 알 수 있었다. 따라서 탈질산화속도를 증가하는 것이 HASP 운영상 보다 높은 질소제거 효율을 갖을 수 있을 것으로 사료된다. Hybrid Activated Sludge Process (HASP) was developed and applied to an activated sludge process for advanced nutrient treatment. The characteristics of nitrogen removal from the HASP was investigated through a kinetic study by batch-type experiment. On-line DB analysis was conducted for the nutrient removal performance in the field demonstration plant treating 10,000 ㎥ sewage per day in P city. This paper aimed to determine the effect of increasing NH₄?-N load on the specific nitrification rate (SNR) and specific denitrification rate (SDNR) through the batch-type experiment and to estimate the net reaction time for the phase-transfer rate by the on-line DB analysis from the HASP manual mode operation. Experimental results include; (1) Both the nitrification and denitrification followed first-order kinetics. (2) The maximum SNR and SDNR were 4.0308 ㎎N/gVSSㆍhr and 2.7852 ㎎N/gVSSㆍhr, respectively. (3) Comparison the phase-transfer rates between nitrification and denitrification from the on-line DB analysis found that nitrification rate was higher than denitrification. It was concluded that increase in denitrification rate can enhance overall nitrogen removal rate in the HASP operation.