컴퓨터 시뮬레이션을 이용한 간헐폭기 MBR시스템에서의 유기물 및 영양염류 처리 성능 평가

유호식,이승희 유기성자원학회 2013 유기물자원화 Vol.21 No.3

The Intermittent Aeration MBR systems have the advantage of controlling reaction time by changing aeration period and are one of economic BNR systems since these processes do not require MLSS recirculation that demands capital and operation costs. In this study, two intermittent aeration MBR systems were studied by computer simulation: an intermittent aeration MBR system that had both 1hr/1hr and 4hr/4hr aeration/unaeration periods at intermittent reactor and NEW INTERMITTENT-process that was an energy saving process and certified as a new process by Korean government. Since DO concentration reached only at 0.23mg/L at intermittent reactor when it was aerated, the Intermittent aeration MBR system having 1hr/1hr aeration/unaeration period showed simultaneous nitrification/ denitrification and had the highest nitrogen and phosphorus removal efficiencies that were 57% and 55%, respectively. Since this study was based on the constant influent flow and characteristics, more studies are needed to define the operational characteristics of intermittent aeration MBR systems under dynamic influent conditions. 생물학적 질소 및 인을 제거하기 위한 경제적인 공법인 간헐 폭기 MBR공법은 내부순환이 없고,간헐반응조 폭기 시간 조절을 통해서 반응시간을 조절할 수 있는 장점이 있다. 본 연구에서는신기술로 인증 받은 폭기에너지 절약 공법인 신 간헐폭기-MBR공법, 그리고 간헐반응조 폭기/비포기 주기가 1시간/1시간 및 4시간/4시간인 일반적인 간헐 폭기 MBR공법에 있어서의 처리성을컴퓨터시뮬레이션을 통해서 평가하였다. 폭기 주기가 1시간/1시간인 간헐폭기 MBR공법의 경우,폭기 시 최대 용존산소 농도가 0.23mg/L가 되어, 동시 질산화/탈질 반응이 수행되는 것으로 나타나질소와 인 제거 효율은 각각 57.0%, 55.0%로 가장 높았다. 본 연구는 유입수질이 일정한 경우에있어서의 시뮬레이션을 수행하였으며, 각 시스템에 있어서의 실 처리장 적용성을 파악하기 위해서는유입수질 변동에 따른 처리성을 평가할 필요가 있는 것으로 나타났다.

2단 간헐폭기 시스템에서 aeration cycle이 질소 및 인 제거에 미치는 영향

정명선(Jeong Myoung Sun),이준호(Lee Jun Ho),서광범(Seo Kwang Bum),김영관(Kim Yeong Kwan) 강원대학교 산업기술연구소 2003 産業技術硏究 Vol.23 No.1

This bench-scale research investigated the aeration cycle(on/off) as the controlling factors for nitrogen and phosphorus removal in a 2-stage, intermittent aeration process. At this experiment, the aeration cycle time(air-on/air-off) was 30min/30min, 60min/60min, 90min/90min. Organic matter removal was observed more than 90% regardless of the aeration cycle and phosphorus removal was relatively high when the aeration cycle time was 60min/60min. On the other hand, For all of the aeration cycle, TN removal was appeared less than 55%. This result was probably due to the limitation of the external substrate for heterotrophic nitrification and aerobic denitrification.

2단 간헐폭기 시스템에서 aeration cycle이 질소 및 인 제거에 미치는 영향

정명선,이준호,서광범,김영관 江原大學校 附設 環境硏究所 2003 環境硏究 Vol.20 No.-

This bench-scale research investigated the aeration cycle(on/off) as the controlling factors for nitrogen and phosphorus removal in a 2-stage, intermittent aeration process. At this experiment, the aeration cycle time(air-on/air-offJ was 30min/30min, 60min/60min, 90min/90min. Organic matter removal was observed more than 90% regardless of the aeration cycle and phosphorus removal was relatively high when the aeration cycle time was 60min/GOmin. On the other hand, For all of the aeration cycle, TN removal was appeared less than 55%. This result was probably due to the limitation of the external substrate for heterotrophic nitrification and aerobic denitrification.

2단 간헐폭기 시스템에서 aeration cycle이 질소 및 인 제거에 미치는 영향

정명선,이준호,서광범,김영관 강원대학교 산업기술연구소 2003 産業技術硏究 Vol.23 No.A

This bench-scale research investigated the aeration cycle(on/off) as the controlling factors for nitrogen and phosphorus removal in a 2-stage. intermittent aeration process. At this experiment, the aeration cycle time(air-on/air-off) was 30min/30min. 60min/60min, 90min/90min. Organic matter removal was obserred more than 90% regardless of the aeration cycle and phosphorus removal was relatively high when the aeration cycle time was 60min/60min On the other hand. For all of the aeration cycle, TN removal was appeared less than 53% This result was probably due to the limitation of the external substrate for heterotrophic nitrification and aerobic denitrification

간헐 폭기식 부직포 여과막 생물반응조에서 폭기/비폭기 시간비가 하수의 유기물 및 질소 제거에 미치는 영향

황도연(Do Yean Hwang),강복춘(Bok Choon Kang),조광명(Kwang Myeung Cho) 大韓環境工學會 2003 대한환경공학회지 Vol.25 No.2

실규모 연속유입간헐폭기 공정(ICEAS)에서 최적운전조건이 경제성에 미치는 영향

정용재,최윤성,이승환 대한상하수도학회 2024 상하수도학회지 Vol.38 No.1

Wastewater management is increasingly emphasizing economic and environmental sustainability. Traditional methods in sewage treatment plants have significant implications for the environment and the economy due to power and chemical consumption, and sludge generation. To address these challenges, a study was conducted to develop the Intermittent Cycle Extended Aeration System (ICEAS). This approach was implemented as the primary technique in a full-scale wastewater treatment facility, utilizing key operational factors within the standard Sequencing Batch Reactor (SBR) process. The optimal operational approach, identified in this study, was put into practice at the research facility from January 2020 to December 2022. By implementing management strategies within the biological reactor, it was shown that maintaining and reducing chemical quantities, sludge generation, power consumption, and related costs could yield economic benefits. Moreover, adapting operations to influent characteristics and seasonal conditions allowed for efficient blower operation, reducing unnecessary electricity consumption and ensuring proper dissolved oxygen levels. Despite annual increases in influent flow rate and concentration, this study demonstrated the ability to maintain and reduce sludge production, electricity consumption, and chemical usage. Additionally, systematic responses to emergencies and abnormal situations significantly contributed to economic, technical, and environmental benefits.

실규모 하수처리장에서 연속유입간헐폭기 공정(ICEAS)의 최적운전방안 및 적용성 평가

정용재,최윤성,이승환 한국수처리학회 2023 한국수처리학회지 Vol.31 No.5

. The intermittent cycle extended aeration system (ICEAS), a modified version of the Sequencing batch reactor (SBR) process, allows continuous wastewater inflow during a single-reactor operation. This system addresses the limitations of the standard SBR process, including the need for sedimentation tanks and sludge return systems and their susceptibility to shock loads. While maintaining simplicity in facility design, the ICEAS process addresses the challenge of achieving continuous inflow and outflow of wastewater. In this study, the performance and critical functions of a full-scale wastewater treatment facility with a capacity of 2,150 m³/day were primarily examined using the improved ICEAS process. The study focused on determining the optimal operating range based on standard parameters in biological reactors, such as MLSS, SRT, DO, sedimentation indices (SV30, SVI, SDI), and advanced treatment ratios (C/N ratio and C/P ratio). The obtained results were applied to the target facility from January 2020 to December 2022. Predictive modeling and operational modes were developed to handle scenarios encountered in real wastewater treatment plants, including fluctuations in influent concentration and flow, rainy weather conditions, and seasonal operations. These measures ensured stable water quality management and compliance with effluent quality regulations.

연속회분식반응조를 이용한 슬러지 소화에서 고형물과 질소의 제거

김성홍(Kim Sung Hong),이윤희(Lee Yoon Heui) 대한토목학회 2006 대한토목학회논문집 B Vol.26 No.6B

SBR반응조를 이용하여 간헐폭기의 슬러지소화 실험을 실시하였다. 폭기비율은 고형물과 질소 제거의 가장 중요한 운전인자 중의 하나였다. 슬러지의 소화에 따라 용출된 유기성질소는 질산성질소로 산화되었고, 생물학적 질소제거율도 높게 나타났는데, 질소제거율은 폭기비율에 따라 달라졌다. 폭기비율 0.25-0.75의 범위에서, 암모니아성 질소의 축적은 보이지 않았으며, pH는 중성에서 유지되었다 폭기비율을 증가시킴에 따라 고형물 제거율은 증가하지만 용존 질소의 제거율은 감소하는 경향을 보였다. 본 실험에서 SBR 반응조를 이용하고, 평균고형물체류시간 8-32일 정도의 설계조건과 폭기비율 0.25-0.75의 운전 조건에서 VSS 제거율은 17-42% 정도, 용존질소 제거율은 80% 이상이 가능하였다. Intermittent aerobic digestion experiments using a sequencing batch reactor (SBR) were carried out in this study. Aeration ratio was found to be an important operation factor for the reduction of solids and nitrogen. As the sludge digested, organic nitrogen was released from the solids and oxidized to nitrate nitrogen. Biological denitrification was also significant and the denitrification rate was limited by aeration ratio. Under the condition of 0.25-0.75 of aeration ratio, acclimation of ammonia nitrogen was not observed and pH were preserved near neutral in the intermittent aerobic digestion. As the aeration ratio increased, solids reduction was increased whereas dissolved nitrogen removal was decreased. Based on the experiments, 17-2% of VSS reduction and over 80% of dissolved nitrogen removal were practicable by intermittent aerobic digestion using a SBR when the MSRT were designed 8-32 days and aeration ratio was operated about 0.25-0.75.

암모니아 센서를 이용한 간헐폭기 Membrane bioreactor공정에서의 전력비 저감과 관형막을 이용한 슬러지 농축에 관한 연구

강희석,이의종,김형수,장암 대한상하수도학회 2014 상하수도학회지 Vol.28 No.2

It is essential to decrease energy consumption and excess sludge to economically operate sewage treatment plant. This becomes more important along with a ban on sea dumping and exhaustion of resource. Therefore, many researchers have been study on energy consumption reduction and strategies for minimization of excess sludge production from the activated sludge process. The aeration cost account for a high proportion of maintenance cost because sufficient air is necessary to keep nitrifying bacteria activity of which the oxygen affinity is inferior to that of heterotrophic bacteria. Also, additional costs are incurred to stabilize excess sludge and decrease the volume of sludge. There were anoxic, aerobic, membrane, deairation and concentration zone in this MBR process. Continuous aeration was provided to prevent membrane fouling in membrane zone and intermittent aeration was provided in aerobic zone through ammonia sensor. So, there was the minimum oxygen to remove NH4-N below limited quantity that could be eliminated in membrane zone. As the result of this control, energy consumption of aeration system declined by between 10.4 % and 19.1 %. Besides, we could maintain high MLSS concentration in concentration zone and this induced the microorganisms to be in starved condition. Consequentially, the amount of excess sludge decrease by about 15 %.

침출수 처리를 위한 침지형 부직포여과 활성슬러지법에서 최적 운전인자 도출에 관한 연구

고현웅(Hyun Woong Kho),최성문(Sung Moon Choi),성낙창(Nak Chang Sung) 大韓環境工學會 2003 대한환경공학회지 Vol.25 No.3