생물학적 황산염 환원올 이용한 금속광산 갱내수의 증금속 제거

임재명,이찬기,한동준 江原大學校 附設 環境硏究所 1996 環境硏究 Vol.13 No.-

A laboratory experiment was performed to investigate the mine drainage treatment using the biological sulfate reduction. An acetate- added synthetic wastewater was used because of low organic content in the acid mine drainage. The Presence of heavy metals in the synthetic wastewater was an operational variable for the laboratory experiment. On the basis of series of experiment, it was found that the sulfate reduction rate and or-ganic removal rate increased with an increment of hydraulic retention time in the laboratory reactors. It was also note that the reactor fed with wastewater containing heavy metals showed a better Performance. It was reasoned that the reduction of sulfide(S^(2-)) toxicity due to the heavy metal complexation, resulting an enhanced microbial activity in the reactor fed with wastewater containing heavy metals, Total removal rate of heavy metals in the lab re-actor was highly correlated with the sulfate reduction rate, and the sulfate reduction rate was closely related with COD removal rate. In addition, an order of heavy metal removals during the sulfate reduction was found as follows : Zn >Pb >Co>Ni>Cu

돈사폐수 처리를 위한 AFBG/ANHBR 공정의 Package화

임재명,권재혁,한동준 江原大學校 附設 環境硏究所 1996 環境硏究 Vol.13 No.-

This study was performed for package of piggery wastewater treatment system, inquired into component of organic matter and biodegradable characteristics in piggery wastewater and extracted removal efficiencies and operating conditions of aerobic fixed biofilm reactor/anoxic fixed biofilm re-actor(AFBR/ANFBR) process with Sun Lock (S/L.™) media, The component characteistics of or-ganic matter in piggery wastewater include 60 percentage of readily biodegradable COD, 25 percent-age of non-biodegradable COD and producted inert material by metabolism of m icroorganisms. In order to reduced sludge production rate and aggravation of water quality, endogenous respiration phase was accepted at first AFBR reactor. As a results of this operating condition, sludge production was minimized and removal efficiency was maintained stability. In order to obtain more than 90 percentage of BOD removal in AFBR/AHFBR process, the sur-face loading rate and volumetric loading rate to the AFBR should be maintained less than 17g BOD/㎡· day and 1.7 kg BOD/㎡· day respectively. Under this condition, BOD removal efficiencies of first AFBR, ANFBR and last AFBR exhibited above 80 percentage, 17 percentage and 40 per-centage, respectively. The removal efficiency of TKN and NHf-h at the loading rates below 5.60 gNH,-N/㎡ · day and 0.56 kg NH_(3)-N/㎥ ·day f·ere above 76 percentage and 82 percentage,respectively.

목질계 Bulking Agent가 돈분의 1차 퇴비화에미치는 영향

임재명,한동준,강현재 江原大學校 附設 環境硏究所 1996 環境硏究 Vol.13 No.-

The objective of this study was to determine the operational parameters in pig manure compo-sting in which sawdust was used as a bulking agent. The efliciencies of the sawdust as a carbon source and the moisture control capabilty in composting process are investigated. The effect of compost recycling is studied as well. When the C/N ratio increased from 17 to 28. decomposition of volatile organic matter improved because of the increased conversion to carbon. However, at a ratio above 28. it decreased. During the composting both the conversions of inorganic nitrogen to organic nitrogen and the carbon to CO_(2) showed a tendency to increase. As a result pH increased to a range of 8.5~8.9. and it appeared that prevention of the loss of nitrogen was not possible. Volatile organic matter was most effectively decomposed at a 60% of the initial moisture content. The content of sawdust required to maintain an appropriate C/N ratio and the moisture content was 17% and 30% of the pig manure on wet weight basis, respectively. It was impossible to meet the appropriate operational requirements simulta-neously by using bulking agent only. With respect to the improvement in volatile organic decomposition. the optimum recycle ratio appeared to be 14% of pig manure on wet weight basis. which accounts for approximately 45% of the amount of sawdust used.

소규모 축산폐수 처리를 위한 RBC/AFBR 공정의 Package화

임재명,권재혁,류재근 江原大學校 附設 環境硏究所 1996 環境硏究 Vol.13 No.-

Using rotating biological contactor(RBC) with artificial endofleneus stage and aerobic fixed biofilm reactor(AFBR), organic material removal and biological nitrification of piggery wastewater has been studied at a pilot plant RBC was operated in the endogenous phase at a interval of every 25 days, The concentration of COD, BOO and TKN in influent wastewater were from 2,940 to 3,800 ㎎/L, from 1,190 to 1,850 ㎎/L and from 486 to 754 ㎎/L respectively, The maximum active biomass content represented as VSS per unit aera was 2.0㎎/㎠ and biofilm dry density of 17 ㎎/㎤ was observed at biofilm thickness of 900 ㎛. It was observed that the pilot scale RBC/AFBR process exhibited 72 percentage to 93 percentage of BOD removal, In order to obtain more than 90 percentage of BOD removal, the organic loading rate to the RBC/AFBR Process should be maintained less than 0,09 ㎥/㎡. day(125,9 gBOD/㎥.d), The TKN removal efficiencies was from 455 to 90,9 Percentage according to vary influent loading rate, It was estimated that the RBC/AFER Process consumed approximately 6,2 ㎎/L(as CaCO_(3) ) of alkalinity per 1 ㎎/L a of N_(3)-N oxidized as the nitrification took piace.

준혐기-호기 생물막 공정을 이용한 돈사폐수 처리

임재명,한동준 江原大學校 附設 環境硏究所 1998 環境硏究 Vol.15 No.-

This research aims to develop biofilm process for the nutrient removal of piggery wastewater. The developed process is the four stage anoxic-oxic biofilm process with recirculation of the final effluent. In summery, the results are as follows:1.Nitrigication in the piggery wastewater built up nitrite because of the high strength ammonia nitrogen The nitrigication of nitrobacter by free ammonia was inhibited in the total ammonia nitrogen loading rate with more than 0.2kgNH_(3)-N/㎥·d 2.The maximal total ammoria nitrogen removal rate was obtained 22℃ and without being affected by the loading rate. But oxidized nitrogen production rate was largely affected by loading rate. 3.Autooxidation by the organic limit was cause of the phosphorus release in the aerobic biofilm process. But the phosphorus removal rate was 90 percent less than the influent phosphorus volumetic loading rate of above 0.1kgNH_(3)-N/㎥·d Therefore the phosphorus removal necessarily accompanied the influent loading rate. 4. On the anoxic-oxic BF process the total average COD mass balance was approximately 67.6 percent. Under this condition the COD mass removal showed that the cell synthesis and metablism in aerobic reactor was 42.8 percent and that the denitrification in anoxic reactor was 10.7 percent, respectively.

춘천시 생활쓰레기의 위생관리를 위한 배출 및 잊 ·화학적 특성

임재명,강성환,한동준,김병욱 江原大學校 産業技術硏究所 1997 産業技術硏究 Vol.17 No.-

Generation and physico-chemical characteristics of municipal solid wastes are very important for sanitary management. However, that has not been investigated os far especially in chunchon. And so, we tried to examine many things in detail. It was resulted that density was 90∼94kg/㎥ in school and office zone and 290∼kg/㎥ in apartment and market place. The compositional weight fraction was food, 40∼54%, paper, 14∼18%, vinyl and plastic, 14∼20% in house zone and market place and paper, 42∼70% in school and office zone. Moisture was estimated to be 54∼57% in independent house zone, apartment and market place and 11∼23% in school and office zone. And three composition was water content, 44.1%, incineration particle, 11.2%, volatile parts, 44.7% in respectively. That is because of seasonal effects and regional characteristics. In the results of chemical composition and caloric value analysis, carbon(C) was 80% in vinyl and plastic and oxygen(O) was 54.4% in paper.

수정된 토양트렌치 공정을 이용한 소규모 오수처리

임재명,김병욱,강성환 江原大學校 附設 環境硏究所 1998 環境硏究 Vol.15 No.-

This research aims to improve the previous trench process. The modified process is consist of 3 processes; first setting tank, 3-staged second contact-filter, and last trench system. The experiments was operated by varying the HRT 8, 6 and 4 hours in trench. The results of laboratory experiments showed removal rate of 97~98% of TKN 91~98% do T-P. From the results of this research, organic materials were removed in settling setting tank and nutrients in the trench stage. Therefore it is recommended to replace the previous 3-staged contact-filter to 1-staged one, and to increase contact-time in trench system.

입상미생물을 이용한 고농도 유기성폐수의 혐기성처리

한동준,임재명,전태성,이현주 江原大學校 産業技術硏究所 1996 産業技術硏究 Vol.16 No.-

This research aims to find granulation and organic removal of the piggery wastewater with the upflow blanket filter (UBF) reactor. UASB process had the effect of high pH on the granulation phase. But teh effect was decreased after the granule formtion. The filter zone of the UBF reactor had the function of GSS and contributed to removing the organic because of its biofilm formtion. The removal rates of total COD and soluble COD were 70% ~ 80% and 60 ~80% at an influent organic loading range of 2 ~ 17.4 kgCOD/m?.d, respectively. The methane production rate with the organic removal was 0.21 ~ 0.34 ℓCH?/gCOD ? and the maximum methan production rate was 0.34 CH?ℓ/gCOD ? at the volumetric loading 5 kgCOD/m?.d.

생물막 반응조에서 돈사폐수의 유기물 특성 및 동력학계수 산정

한동준,임재명,권재혁 江原大學校 産業技術硏究所 1996 産業技術硏究 Vol.16 No.-

This research was performed for the fundamental data using a advanced treatment process of piggery wastewater. Characteristics of influent wastewater was divided with various methods in fixed biofilm batch reasctor. Fractons of organic were divided into readily bioderadable soluble COD(Ss), slowly biodegradable COD(Xs), nonbiodegradable soluble COD(S?),and nonbiodegradable suspended COD(X?). Experimental results were summerized as following : i)biodegradable organics fraction in piggery wastewater was asbout 88.1 percent, and fraction of readily biodegrasdable soluble COD was about 66.1 percent. ii)Fractions of nonbiodegradable soluble COD was 11~12 percent, and soluble inert COD by metabolism was producted about 6~8 percent. iii) Active biomass fraction of attached biofilm was about 54.7percent, annd substrate utilization rate and maximum specific growth rate of heterotrophs were 8.315 d and 3.823 d? respectively.

생물막 공정에 의한 고농도 암모니아 폐수처리시 질소 거동 및 질산화 저해

한동준,임재명,강성환 江原大學校 附設 環境硏究所 1997 環境硏究 Vol.14 No.-

This study was performed to investigate the nitrogen behavior in piggery wastewater treatment, and the inhibitory condition in nitrification was also examined. The ammonia nitrogen was removed via stripping, nitrification, autotrophic cell synthesis, and heterotrophic cell synthesis. The removal percents by each step were 12.1%, 68.9%, 15.0%, and 4.0%, respectively. Nitrite and nitrate production rates were found 0.42mg/g MLVSS/hr and 0.05mg/g MLVSS/hs, respectively. Maximum removal rate of the total ammonia nitrogen occurred at temperature over 22℃, regardless of the volumetric loading rates. Nitrification inhibition of piggery wastewater was found to occur at an influent volumetric loading rate over 0.2NH₃-N kg/㎥/d.