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전자수용체 측정을 통한 호기 및 무산소조건에서의 미생물 증식계수 산정
유대환(Dae Hwan Rhu),최의소(Eui So Choi) 한국물환경학회 2000 한국물환경학회지 Vol.16 No.5
Evaluation of sludge mass produced by substrate removal is important to operate biological wastewater treatment plant. Sludge production depends on the yield coefficient of the bacteria metabolizing substrates. It is indispensible for predicting the sludge production to evaluate accurate yield coefficient. Especially. It is supposed that anoxic yield coefficient be different to that of oxic condition due to different reaction condition in BNR process. Yield coefficients were evaluated by measuring electron acceptors at oxic and anoxic conditions. The average oxic yield coefficient was about 0.5g cell COD/gCOD removed independent to temperature. The anoxic yield coefficient was various with temperature: 0.2 at 20℃, 0.3 at 10℃ and 0.5g cell COD/gCODremoved at 5℃.
DPB를 포함한 5 - Stage BNR 공정을 이용한 생물학적 질소 , 인 제거
유대환(Dae Hwan Rhu),박종복(Jong Bok Park),이재진(Jae Jin Lee),이원권(Won Kwon Lee) 한국물환경학회 2001 한국물환경학회지 Vol.17 No.1
The biological nutrient removal from wastewater with low C/N and C/P is difficult. This study was carried to remove nitrogen and phosphorus from wastewater by using the 5-stage BNR process with denitrifying phosphorus removing bacteria(DPB). The 5-stage BNR process could achieve stable phosphorus and nitrogen removal with less substrate consumed. These laboratory experiments revealed that step feed with DPB showed a possibility of biological nitrogen and phosphorus removal from low organic municipal wastewater. With DPB, specific denitrification rate was 1.3 ㎎NO₃-N/gVSS/hr and specific phosphorus utilizing rate was 2.0 ㎎SP/gVSS/hr.
질산성 질소 저장조가 설치된 SBR 을 이용한 저 농도 하수에서의 인 제거
최의소(Eui So Choi),박홍근(Hong Keun Park),유대환(Dae Hwan Rhu) 한국물환경학회 2000 한국물환경학회지 Vol.16 No.5
Sequencing batch reactors operating with weak sewage have a tendency of poor phosphorus removal due to inhibition of oxidized nitrogen. To minimize this inhibition, nitrate storage tank was utilized in this study. Phosphorus removal was successful with nitrate storage tank. With influent BOD 100 ㎎/L and VFA 30 ㎎/L, a total of the maximum removable nitrogen and phosphorus was about 30 ㎎/L with 8 to 9 hr HRT. VFA utilized for phosphorus removal was about 5 ㎎COD/㎎P. The concentrations of effluent nitrogen and phosphorus were generally 11 and 1 ㎎/L, respectively.