활성슬러지 기능촉진제를 이용한 오수처리

성일화,최용수,박흥석,유명진 한국물환경학회 1994 한국물환경학회지 Vol.10 No.1

An experiment was conducted in order to examine the effect of commercial additive which contained humus plus minerals. The additive with the trade name $quot;Biothrough$quot; was used in this study. In reactors A and B, an additional aeration tank for 12 hours detention of recycle sludge was installed and $quot;Biothrough$quot; was submerged inside the tank. In reactor C, $quot;Biothrough$quot; was submerged inside reactor and was not used in reactor D, the control unit. The experimental results are summarized as follows ; SVI was lowest for reactor A at the FiM ratio of both 0.15 to 0.83 and 0.14 to 0.51 ㎏ BOD/㎏ MLSS·day. The biopolymer excretion per unit weight of activated sludge increased in accordance with the increase of HRT. The results indicated that the reactors attached with additive were more efficient in improving the settling characteristics of activated sludge. In that respect, it was thought that the attachment of additive in tank improved activated sludge characteristics and further detention led the microbes towards favorable endogenous phase where more excretion of biopolymer was possible. Such increase of biopolymer excretion improved the aggregation and in turn the settle ability of activated sludges.

반응성 염료 제거용 생체 흡착제 생산을 위한 최적 조건 관련 기초 연구

성일화,김경미,조원보 한국도시환경학회 2016 한국도시환경학회지 Vol.16 No.2

BIO-CLOD를 이용한 하수 슬러지 탈수성 개선 효과분석

성일화,Sung, Il-Wha 한국환경보건학회 2015 한국환경보건학회지 Vol.41 No.5

Objectives: In order to review both the effects of sewage sludge dewaterability and deodorizing ability in the existing advanced sewage treatment process, BIO-CLOD (a solidified mixture of 10% Bacillus concentrate and inorganics) was used as an inorganic conditioner effective for deodorization treatment in addition to the removal of organic matter and nutritive salts. Methods: Sludge dewaterability was evaluated using specific resistance to filtration (SRF) experiments with six agitators and two types of commercially available BIO-CLOD; one that is made by grinding solid matter (powdered BIO-CLOD) and one that has been obtained by sieving a separation with a particle diameter of 100 mesh (100 mesh BIO-CLOD). For deodorization odor treatment experiments, 20 g of commercially available solid BIO-CLOD was submerged in four liters of sewage sludge and mixed and agitated for 45 days. Results: When BIO-CLOD was injected into sewage sludge to experimentally compare specific resistance to filtration (SRF), the optimum amount of BIO-CLOD to be injected was shown to be 2% w/v and the SRF value in this case was $1.35{\times}10^{12}m/kg$. pH changes following BIO-CLOD injection were within 6.5-7.0. By 14 days after submerging BIO-CLOD into the sewage sludge to evaluate its deodorizing ability, $H_2S$ decreased by 68% and methyl mercaptan decreased by 74%. By 45 days after the submergal, both items decreased by 100%, indicating deodorizing ability. Conclusion: To compare the levels of dewaterablity of sewage sludge at different particle sizes of inorganic conditioner, powdered BIO-CLOD, particle size 100 mesh BIO-CLOD, and bentonite were tested. It could be seen that as the powdered BIO-CLOD increased, the precipitability increased up to 62% in 30 minutes. As an inorganic conditioner, BIO-CLOD was identified as a stable sludge conditioner that does not affect pH.

염색폐수처리 오니로부터 약품회수에 관한 연구 (pp.157-157)

성일화,민달기 한국환경관리학회 2001 한국환경관리학회 학술연구발표회 논문초록집 Vol.2001 No.7

차아염소산과 철염을 이용한 하수슬러지의 탈수효과

성일화,Sung, Il-Wha 한국환경보건학회 2009 한국환경보건학회지 Vol.35 No.1

This study investigated improvement to sludge dewaterability and coagulation for sewage treatment plant sludge by using sodium hypochlorite solution (NaOCl), ferric sulfate [$Fe_2(SO_4)_3$] and zeolite. The specific resistance to filtration(SRF), chloride, pH and turbidity were used to evaluate the sludge dewatering behaviors. The results of study were as follows: By varying the amount of NaOCl added the optimum result in terms of enhancement for pretreatment occurred when 34 mg/l of NaOCl was injected. When the total solids concentration of the sludge was 10,000 mg/l, the optimum ferric sulfate dosage for the sludge dewaterability was 150 mg/l and the corresponding SRF was $1.7{\times}10^7sec^2/g$. It was observed that injecting zeolite into sludge was effective in improving the dewaterability of sludge.

오염처리장의 처리효율 개선연구

성일화 한국환경보건학회 1993 한국환경보건학회지 Vol.19 No.3

The objective of this research was to retrofit an on-site sewage treatment system suitable to current situation of Korea to reduce the pollution loading and preserve the invaluable water resources. Operation at the F/M ratio of 0.1 kg. BOD/kg MLSS day showed 87.1% BOD removal efficiency and 84.5% COD removal efficiency, and its effluent concentration was 6.4 mg/l as BOD and 21.7 mg/l as COD. Average removal of total nitrogen showed high removal efficiency of 80%.

펜톤산화에 따른 복합폐수의 처리효율연구

성일화,Sung, Il-Wha 한국환경보건학회 2006 한국환경보건학회지 Vol.32 No.5

In order to treat the wastewater containing organic compound, pre-treatment system connected with MSP(molecular separation process) was investigated. With the aim of selecting an optimum process of Fenton's oxidation, removal efficiency of each process in the optimum reaction condition was recommended. The $Fe/H_{2}O_{2}$(ferric sulfate to hydrogen peroxide)reagent is referred to as the Fenton's regent, which produces hydroxyl radicals by the interaction of Fe with $H_{2}O_{2}$. The powerful oxidizing ability and extreme kinetic reactively of the hydroxyl radical was well established. Increasing dosage of $Fe/H_{2}O_{2}$ increased removal efficiency as molar ratio of $Fe/H_{2}O_{2}$ between 0.2 and 2.5. Optimum dosage of molar ratio was 1. The removal efficiency for reaction condition was increased as pH decreased when the molar ratio of $Fe/H_{2}O_{2}$ was 1.7. Fenton's oxidation was most efficient in the reaction time 35 min for complex wastewater. Also, coagulation aid experiments using kaolin resulted in 3% of kaolin dosage.

생물학적 고도처리공정 특성 연구

성일화 京畿專門大學 2001 京畿專門大學 論文集 Vol.- No.29

This study was carried out to compare BNR(biological nutrient removal)processes which could be applied to retrofit the existing sewage treatment plant. The system pH had significant effects on the activities on nitrite denitrofication compared to nitrate denitrofication. The nitrite denitrofication was completely inhibited at the operating pH of 7. The activity of nitrite denitrofication also reduced at higher pH ranges of 9 to 9.5. This reveals that it is an important operating method to keep an appropriate microbes and specific surface area at the optimum pH during the operation period. The optimum media packing ratio was determined 15v/v% according to the effluent quality and overall nitrogen removal efficiency. The settling characteristics of sludge from BNR process was worse than conventional activated sludge process. The poor settling and dewatering characteristics of sludge was due to large number of fungi.

유기성 폐기물의 퇴비전환에 따른 경제성평가

성일화,민달기 京畿專門大學 1996 京畿專門大學 論文集 Vol.- No.24

Alum과 PACl을 이용한 응집처리

성일화,Sung, Il-Wha 한국환경보건학회 2009 한국환경보건학회지 Vol.35 No.1

In order to treat the complex wastewater containing organic compound and solids, pre-treatment system associated with molecular separation process were investigated. The reductions of COD and turbidity were obtained after coagulation processes using Alum (Aluminium sulfate, $Al_2(SO_4)_2{\cdot}18H_{2}O$) and PACl (poly aluminium chloride as 17% $Al_{2}O_{3}$). The results of study were as follows: using variable dosage of Alum, COD removal was highest at 4,000 mg/l, and the reduction of COD and turbidity was 42% and 92%, respectively. The optimum coagulation would be effective at pH 7.3 than pH 9.0 by the addition of alum at a concentration of 6,000 mg/l and PACl was add at 4.25% in raw complex wastewater with 2,000 mg/l alum at pH 7.3, the reduction of COD was reduced by 32%. But coagulation aid experiments indicated that PACl would be more effective in sludge separation ability than COD removal efficiency.