슬러지처리 : 산발효시 하수슬러지의 유입부하율의 영향

엄태규 ( Tae Kyu Eom ),한동엽 ( Dong Yueb Han ),차기철 ( Gi Chul Cha ) 대한상하수도학회 2003 공동추계 학술발표회 논문집 Vol.2003 No.-

일본의 하수도시설과 연구과제

엄태규(Eom Tae-Kyu) 경성대학교 인문과학연구소 1998 일본연구논총 Vol.10 No.-

Bacillus sp.를 이용한 SBR의 HRT에 따른 유기물질 및 N, P의 제거특성

엄태규 ( Tae Kyu Eom ),한동엽 ( Dong Yueb Han ) 한국수처리학회 2005 한국수처리학회지 Vol.13 No.3

투입폐플라스틱의 성상개선을 통한 실 규모 유화공정의 효율향상 연구

엄태규 ( Tae-kyu Eom ) 한국환경기술학회 2013 한국환경기술학회지 Vol.14 No.6

열분해 기술은 폐플라스틱을 처리하고 2차 오염 물질의 발생을 최소화하는 에너지 회수 기술의 일종이다. 열분해는 폐플라스틱을 무산소 또는 저산소 조건하에서 500℃로 가열하는 조작이며, 연소는 발열반응에 의하여 이루어지나 열분해는 흡열반응에 의하여 진행된다. 유화처리의 대상폐기물은 탄소고리를 가진 유기화학 물질을 포함하고 있는 것이면 가능하며, 폐플라스틱 대부분이 포함된다. 열분해 공정은 폐플라스틱을 무산소 상태에서 열을 가하고, 이때 환원성분위기에서 분해되어 기체, 액체로 분해되어 증발하고, 분해되지 않은 물질은 고체(잔사)로 남게 된다. 생성물의 수율은 원료의 화학구조 형상 열분해온도와 속도에 의존하게 된다. 열분해 생성물은 산소를 공급하여 연소하며 물과 이산화탄소 및 열로 되어, 재연소에 의하여 에너지를 회수할 수 있다. 기존공정은 회분식 투입으로 기계설비가 크고, 폐플라스틱의 열분해 요구량이 매우 큰 관계로 비경제적이다. 많은 회분식 공정들이 출현되어 현장에의 적용이 되지 못한 체 사장된 가장 큰 이유는 기계설비의 효율성을 극대화하는데 실패하였기 때문이다. 따라서 본 연구는 기존 공정의 기능향상을 위해서 페플라스틱의 연속투입 및 슬러지의 연속배출로 기계설비용량을 극소화하고 열분해 요구량도 축소시킴으로서 현장에의 적용성을 실현하고자함을 목표로 하였다. 기존 공정의 비효율성을 개선하기 위해, 열풍기 및 분쇄기의 개선적용 후 개선된 생산량을 검토하기 위하여 기존 설비의 월 생산평균값과 운전일수, 열풍기 및 분쇄기 적용 후의 월 생산 평균값과 운전일수를 비교하여 비교 가능한 운전데이터를 선별하여 기존데이터와의 비교 검토를 실시하였다. Pyrolysis technology is a kind of energy recovery technology that waste-plastics are treated and generation of second pollutants is minimized. It is heated to a temperature of 500 degrees Celsius in the anaerobic condition or hypoxic condition and, it is proceeded by endothermic reaction. It treats waste-plastics which includes organic chemistry materials have carbon chains and most of plastic is relevant to target. Pyrolysis process applies heat to plastic in the anaerobic condition, and plastics are decomposed to the gas and liquid, then decomposed materials are vaporized in the reducing condition. At this time, non-decomposed material is left to solid state for residue. The yield of products depends on the chemical structure, forms of materials, pyrolysis temperature and pace. Pyrolysis products is burned with applied oxygen and it become water, carbon dioxide and heat, and ten energy is collected by re-burning. Established process, batch insert equipment, is uneconomical because machinery is huge and pyrolysis demand is very high. Most of batch processes are failed to be apply to actual places since it is difficult to maximized the efficiency of machinery. Therefore, the object of this study is that minimize the equipments by continuous insert of plastics and continuous generation of sludge for improvement of established processes. Moreover, it is tried to be realized the application on the actual places. To improve the inefficiency of established process, it is changed to continuous process and considered operabilities are as in the following. To improve in existing processes, the existing production amount and production amount after applying the heater and crusher were compared. for compare to this, used monthly production amount and operation date.

폐플라스틱 유화공정의 공정개선 및 효율향상

엄태규 ( Tae-kyu Eom ) 한국환경기술학회 2012 한국환경기술학회지 Vol.13 No.4

열분해 기술은 폐플라스틱을 처리하고 2차 오염 물질의 발생을 최소화하는 에너지 회수 기술의 일종이다. 열분해는 폐플라스틱을 무산소 또는 저산소 조건하에서 500℃로 가열하는 조작이며, 연소는 발열반응에 의하여 이루어지나 열분해는 흡열반응에 의하여 진행된다. 유화처리의 대상폐기물은 탄소고리를 가진 유기화학 물질을 포함하고 있는 것이면 가능하며, 폐플라스틱 대부분이 포함된다. 열분해 공정은 폐플라스틱을 무산소 상태에서 열을 가하고, 이때 환원성분위기에서 분해되어 기체, 액체로 분해되어 증발하고, 분해되지 않은 물질은 고체(잔사)로 남게 된다. 생성물의 수율은 원료의 화학구조 형상 열분해온도와 속도에 의존하게 된다. 열분해 생성물은 산소를 공급하여 연소하며 물과 이산화탄소 및 열로 되어, 재연소에 의하여 에너지를 회수할 수 있다. 기존공정은 회분식 투입으로 기계설비가 크고, 폐플라스틱의 열분해 요구량이 매우 큰 관계로 비경제적이다. 많은 회분식 공정들이 출현되어 현장에의 적용이 되지 못한 체 사장된 가장 큰 이유는 기계설비의 효율성을 극대화하는데 실패하였기 때문이다. 따라서 본 연구는 기존 공정의 기능향상을 위해서 페플라스틱의 연속투입 및 슬러지의 연속배출로 기계설비용량을 극소화하고 열분해 요구량도 축소시킴으로서 현장에의 적용성을 실현하고자함을 목표로 하였다. 기존 공정의 비효율성을 개선하기 위해, 연속투입 공정의 변경과 운전가능성을 다음과 같이 고려되었다. 분쇄기 및 선별기 등의 전처리 과정은 폐플라스틱의 연속투입을 위해 필요하다. 그리고 슬러지의 연속생성 시험이 성공적 연속투입 및 운영에 의한 열분해 과정에서 필수적이었다. 생산 재생유의 낮은 점화점과 같은 문제점이 있었지만, 대체 에너지로의 이용가능성이 확인되었다. 생성 된 슬러지의 분석결과 중금속 성분을 조정 한 후 고체 연료로의 이용 가능한 것으로 나타났다. Pyrolysis technology is a kind of energy recovery technology that waste-plastics are treated and generation of second pollutants is minimized. It is heated to a temperature of 500 degrees Celsius in the anaerobic condition or hypoxic condition and, it is proceeded by endothermic reaction. It treats waste-plastics which includes organic chemistry materials have carbon chains and most of plastic is relevant to target. Pyrolysis process applies heat to plastic in the anaerobic condition, and plastics are decomposed to the gas and liquid, then decomposed materials are vaporized in the reducing condition. At this time, non-decomposed material is left to solid state for residue. The yield of products depends on the chemical structure, forms of materials, pyrolysis temperature and pace. Pyrolysis products is burned with applied oxygen and it become water, carbon dioxide and heat, and ten energy is collected by re-burning. Established process, batch insert equipment, is uneconomical because machinery is huge and pyrolysis demand is very high. Most of batch processes are failed to be apply to actual places since it is difficult to maximized the efficiency of machinery. Therefore, the object of this study is that minimize the equipments by continuous insert of plastics and continuous generation of sludge for improvement of established processes. Moreover, it is tried to be realized the application on the actual places. To improve the inefficiency of established process, it is changed to continuous process and considered operabilities are as in the following. Pre-treatment process such as a crusher and a sorter are necessary for continuous insert of waste-plastics. And, continuous generation of sludge was essential at the pyrolysis process by continuous insert and operating test was successful. Low ignition point of produced regeneration-oil was a kind of problem, but it was confirmed that it was possible to be an alternative energy. An analysis of generated sludge shows that it was recognized has possibility to be a solid fuel after ingredients adjustment of heavy metals.

탄소원 및 질소원의 결핍에 따른 Ruminococcus flavefaciens FD -1 의 유기물질 분해특성 및 Mechanism 에 관한 연구

엄태규(Tae Kyu Eom) 大韓環境工學會 1995 대한환경공학회지 Vol.17 No.3

바실러스균을 이용한 SBR공정의 효율향상 연구

엄태규 ( Tae Kyu Eom ) 한국수처리학회 2011 한국수처리학회지 Vol.19 No.6

Sequencing batch reactor(SBR) process changed spatial concept for temporal concept of established wastewater treatment system. It is possible to apply a wastewater process structure without a considerable change. In addition, if it is operated with mixed processes such as anaerobic, aerobic and anoxic, it can remove organic matters, nitrogen and phosphorus. B3(Bio-Best-Bacillus system) is applied to accomplish a removal of nitrogen and phosphorus. When high-concentrated Bacillus sp. intakes nitrogen and phosphorus, it is composed to cells and then, denitrification is occurred and phosphorus is removed. Therefore, if SBR and B3 processes were applied at the same time to wastewater system in the Korea, the removal efficiency of nitrogen and phosphorus will be more efficient than before. The experiment was conducted with lab-scale reactor and the operating condition for reaction time is separated to high-aeration, low-aeration and anoxic. The results showed that more than 90% of COD, nitrogen and phosphorus overall removal efficiencies were indicated in the early of reaction time and the COD concentration of effluent in HRT 6 hours and 8 hours were 16 and 12 mg/L respectively. The nitrogen concentration of effluent were 20.6 and 17.1 mg/L respectively, and each of removal efficiency were 52% and 60%. The phosphorus concentration were checked to 1.45 and 1.33 mg/L in effluent respectively, and the removal efficiency were 73.5% and 75.4%. In the batch experiment with ammoniacal nitrogen and nitrate nitrogen, most of nitrate nitrogen remained in the reactor, so it was supposed that denitrification was not proceeded practically in a regular DO concentration, and ammoniacal nitrogen was removed regularly regardless of nitrate nitrogen.

열처리, 초음파 및 알칼리 병합전처리에 따른 하수슬러지의 산발효 향상에 관한 연구

엄태규 ( Tae Kyu Eom ),한동엽 ( Dong Yueb Han ) 한국수처리학회 2008 한국수처리학회지 Vol.16 No.2

유기성 폐기물의 상온 혐기성 소화에 있어서 수리학적 체류시간의 영향

엄태규 ( Tae Kyu Eom ),최종현 ( Jong Hyun Choi ) 한국수처리학회 2011 한국수처리학회지 Vol.19 No.2

The anaerobic process has been usually operated under mesophilic and thermophilic conditions. If the aerobic digestion under normal temperature gains a result similar with the process under high temperature, it can lower the treatment cost of wastewater needed. The purpose of this study is to determine optimum HRT on each mixing ratio securing economical efficiency by comparing treatment characteristics according to mixing ratio of livestock wastewater and food wastes. The pH range in reactors was 8.35~8.55 and average alkalinity of effluent was 12,480 mg/L in HRT 30 days, 12,440 mg/L in HRT 40 days, 12,420 mg/L in HRT 50 days and 12,070 mg/L in HRT 60 days. This is out of common alkalinity concentration in anaerobic reactor for stable operation, but any obstacle was not shown. Therefore, the others such organic loading rate are considered more important under the high pH and alkalinity conditions. It was thought that methanogens were inhibited from high pH and ammonia, given the high VFAs concentrations more than 2,500 mg/L. But because high alkalinity pH drop wasn`t arisen. It was estimated that methanogen was inhibited from high pH and total ammonia nitrogen, it was operated under the inhibited steady state. COD concentration was not big difference in HRT 40, 50 and 60 days, but VFAs concentration was low in HRT 50 days in case of mixing ratio 5:3 and HRT 40 days in the event of mixing ratio 5:2 and 5:1, it was thought that activity of methanogen was high.

테이퍼타입 스크류프레스를 적용한 가축분뇨 고액분리의 현장적용성 연구

엄태규 ( Eom Tae-kyu ),이진석 ( Lee Jin-seok ) 한국수처리학회 2016 한국수처리학회지 Vol.24 No.5

Cylinder-type screw press has been widely applied to the solid-liquid separator of livestock manure, while taper-type screw press has not yet. The purpose of this study is to evaluate the possibility of pre-treatment of livestock manure using taper-type screw press. A new taper-type screw press was designed and applied to the field test in pig farms and dairy farms. The experimental results for the solid-liquid separation of livestock manure using a taper-type screw press showed that the dewatering efficiency increased compared to the conventional cylinder-type screw press. The water content of the dewatered solids was indicated to be 70∼75% for cylinder-type solid-liquid sparator and 65∼68% for cylinder-type solid-liquid separator. The taper-type screw press(round 1.5mm) exhibited that a large amount of solids was discharged in the separated liquid, resulting from the fact that the size of its screen opening was larger than that of cylinder-type screw(slot 0.5mm). The SS concentrations in the separated liquid were observed to be 20,000∼40,000ppm for cylinder-type screw press and 30,000∼50,000ppm for taper-type screw press. The taper-type solid-liquid separator has benefit in the view of solids recycling in the way that it could decrease the water content of dewatered solids while it has also disadvantage in the view of recycling and disposal of the separated liquid.