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하수와 초단파 조사된 잉여슬러지의 병합처리가 A<sup>2</sup>/O 공정의 잉여슬러지 발생량에 미치는 영향
범봉수 ( Bongsu Bum ) 한국폐기물자원순환학회 2023 한국폐기물자원순환학회지 Vol.40 No.4
Organic wastewater, enriched with nutrients such as nitrogen and/or phosphorus, is commonly treated utilizing an A<sup>2</sup>/ O process. However, technological and cost barriers pose challenges for the extra processing of excess sludge. This study aims to analyze the effects of employing a co-treatment of microwave-irradiated (MWI) excess sludge with wastewater via an A<sup>2</sup>/O process on subsequent excess sludge production. A comparative experiment was performed, wherein two reactors implementing the A2/O process were deployed. The process included anaerobic (An), anoxic (Ao), aeration (Ox), and settling tanks, along with an internal recycle rate of 2Q, and a sludge return rate of 1Q. Initially, primary effluent and returned sludge from the S Sewage Treatment Plant were utilized. The reactors' hydraulic retention time (HRT) was gradually decreased from 10 hr to 4 hr. All excess sludge was wasted in one reactor (R-C), operating as a control. In contrast, in the other reactor (R-M), 250 mL of excess sludge was microwave-irradiated for 3 minutes and then channeled to an anaerobic tank with primary effluent. Results indicated that the Reagent-Volume to Microorganism-Weight (F/M) ratio in R-M was slightly higher than in R-C. Excess sludge production in R-M was 34% less than in R-C, corresponding to the average microbial growth coefficients for R-C and R-M were 0.352 mg SS/mg COD<sub>rem</sub>. and 0.234 mg SS/mg COD<sub>rem</sub>, respectively. Although l influent concentrations of Chemical Oxygen Demand (COD), Total Nitrogen (T-N), and Total Phosphorus (T-P) were higher for R-M, their removal efficiencies proved superior. However, a shortened HRT of 4 hr resulted in a drop in treatment efficiencies across all reactors.
범봉수(Bong-Su Bum) 한국환경관리학회 2013 環境管理學會誌 Vol.19 No.2
인구 500명 미만의 지역에 Pilot-plant를 이용하여 실 Plant의 적용 가능성을 알아보기 위해 실험한 결과 Type1 시설은 Type 2단계 시설보다 근본적으로 보다 나은 처리능력과 특히 높은 안정성을 보여 주었다. 실험 중 Type 1은 BOD5값은 8 mg/L보다 작게, COD값은 56 mg/L보다 작게 유지될 수 있었다. 또한 똑같은 조건에서 온도가 3℃이하일 때 거의 완전한 질산화가 이루어 졌으며 질소 제거율이 평균 45%, 최대66.7%의 제거율을 나타내며 인 제거율은 평균 33%, 최대 62.9%에 달했다. The study was carried out to investigate the Pilot-plant of a container-type biological process of two types of about 260 people residence from December, 2003 to June, 2004. The type 1 facilities showed better process ability especially on the high stability and fundamentally better than those of Type 2 step facility. The type 1 showed high COD and BOD5 removal ability during experiment. The sewage outlet BOD5, the COD is able to keep at 56 mg/L and at 8 mg/L in a mixed sample inspection for 24hours. When temperature was 3℃ degrees or below, A nitrogen removal rate was reached at an average of 45% with the maximum removal rate of 66.7%. Phosphorus removal rate was also reached at an average of 33% with the maximum removal rate of 62.9%.
범봉수 ( Bong Su Bum ),김희영 ( Hee Young Kim ),김연은 ( Yun Eun Kim ),조용현 ( Yong Hyun Cho ) 한국수처리학회 2014 한국수처리학회지 Vol.22 No.5
Recently to control refractory dissolved organic matter which is recognized as a problem of water quality management in public water area, it is strongly requested the strengthening of process for T-P which is the growth limitation factor. So we have researched the characteristic of filteration through composite filtering system by direct filteration system adapted floating media to treat phosphorus treatment of second sewage disposal water and particle pollutant. In this research we could confirm the increase of phosphorus removal efficiency by glowing bigger particle floc than existing filteration process through slow mixing of composite direct filteration system. And also as a result of an experiment of filteration efficiency for each coagulants, PACl was approved as the most appropriate coagulants.