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UASB 반응조와 SBR을 이용한 Anammox 공정의 발현
박노백 ( Noh Back Park ),박상민 ( Sang Min Park ),서태경 ( Tae Kyeong Seo ),전항배 ( Hang Bae Jun ) 충북대학교 산업과학기술연구소 2007 산업과학기술연구 논문집 Vol.21 No.2
Adaptation of wastewater treatment systems to more stringent European discharge standards requires the application of new technologies for the removal of nutrients like ammonia from the wastewater. The start-up of an Anammox(anaerobic ammonium oxidation) process was investigated in laboratory-scale UASB(up-flow anaerobic sludge blanket) reactor and anaerobic SBR(sequencing batch reactor). Ammonia nitrogen and nitrite were stably removed by anammox reaction in UASB reactor and their efficiency were 85% and 90%, respectively, which resulted in TN removal efficiency of 82% or higher. During the start-up of SBR operation, ammonia concentration of effluent was slightly than that of influent however ammonia started to be removed by anammox reaction after 140 days. Afterward, efficiency of TN removal by anammox was over 61% at steady state.
응집에 의한 생물학적 처리수의 색도 및 난분해성 유기물 제거
서태경, 박상민, 박노백, 임지영, 전항배 충북대학교 건설기술연구소 2008 충북대학교 건설기술연구소 논문집 Vol.27 No.1
This study was to evaluate the optimum conditions for chemical coagulation to remove color and non-biodegradable organic matters from the biologically treated water of piggery wastewater. Raw water was fractionated by characteristics of dissolved organic matter. The fractions of hydrophilic substance and molecular weight cut-off(MWCO) below 500 in raw water were 51% and 74%, respectively. SC(streaming current) was measured to find out the optimum pH values and dosages for aluminium sulfate[Al₂(SO₄)₃·14H₂O] and ferric chloride[FeCl₃·6H₂O] as a coagulant, which was compared with color and turbidity removal efficiencies followed by coagulation, flocculation and sedimentation. From several jar tests, optimum pH values and dosages of coagulants were well matched with the results of SCD analyses. The optimum dosages(pH values) of aluminium and ferric were 5.84 mM(pH 4.0) and 7.03 mM(pH 5.6), respectively. At optimum conditions of coagulation, color removal efficiencies for aluminium sulfate and ferric chloride were as high as 89.3 and 97.9%, respectively. Chemical coagulation showed good performance to remove color and non-biodegradable organic matters from biologically treated water.