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슬러지의 선택적 분리를 위한 침전지의 직렬운전에 관한 연구
정팔진 ( Jeong Pal Jin ),조선영 ( Jo Seon Yeong ),정진필 ( Jeong Jin Pil ),이은주 ( Lee Eun Ju ) 한국물환경학회 2003 한국물환경학회지 Vol.19 No.6
A wide variety of research concerning the functions about biological reactor has been performed in many practical area. Besides these functions, a particular interest is the selection of activated sludge which comes into the final clarifiers. It has been found that microorganisms which prevent the setting and it can be controlled with this method. As a result, the influence a bulking can be reduced. On the other hand, bulking controls by microorganisms of selective setting character have been rarely studied at the activated sludges aeration basin. Our present study, is focus to, see how much effective the series operation(S-1) is compared to the parallel(P-1) one by studying the management of the final clarifiers functioning in the two different ways : parallel and series. There were mainly three stage for the operating period. First stage(Run-1 ; was the bulking which is induce, in particular period and the settleability in each reactor was compared at second stage(Run-2) when the sludge bulking was produced. Finally, P-1 and S-1 which is experimented in Run-2 were switched at third stage(Run-3). When microorganisms, which is cause the bulking, grew massively, sludge settleability of S-1 is superior to that P-1. This outcome stemmed from the fact that only by microorganisms, which have a good settleability were returned to the clarifiers of S-1 reactor at the first stage. In addition, although microorganisms grew massively, as well as a good sludge settleability was kept at the second stage because microorganisms, which are the cause of bulking were wasted.
정팔진 ( Jeong Pal Jin ),이은주 ( Lee Eun Ju ),김민정 ( Kim Min Jeong ) 한국물환경학회 2004 한국물환경학회지 Vol.20 No.1
This paper was studied about the characteristics of treatment by ionized gas for livestock wastewater, aiming at the effects of ionized gas on organic matter, hydrophobic and hydrophilic organic matter in lviestock wastewater when the new process of advanced oxidation process was applied for meeting the improved the quality of effluent. The organic matter within treated livestock wastewater by ionized gas was partially mineralized according to the time increasement. The TCOD_(Mn) in the livestock wastewater was decreased from 840㎎/L to 340㎎/L when treated by ionized gas by the enhancement of time. We occupied the equations of TCOD_(Cr), SCOD_(Cr), TCOD_(Mn) as ti uibuzed gas treated time. As TCOD_(Mn) increasing ionized gas treated time, the concentration did not meet the water quality. COD_(Mn) 40㎎/L. So, for removing of the remaining organic matter in the effluent after ionized gas following process is necessary. After treating the livestock wastewater by ionized gas, coagulation was considerable for organic matter removal up to regulation water quality. From UV scans of the treated livestock wastewater by ionized gas, the wastewater has low aromaticity and good colour.
정팔진 ( Jeong Pal Jin ),이은주 ( Lee Eun Ju ),김민정 ( Kim Min Jeong ),조선영 ( Jo Seon Yeong ) 한국물환경학회 2004 한국물환경학회지 Vol.20 No.1
Laboratory studies were carried out to find out the characteristics of humic acid treatment by activated carbon and ionized gas. In order to increase oxidation power of ionized gas for treating organic matter, we used granular activated carbon. By using UV_(254), easy analysis method, we calculated humic acid concentration and SCODcr concentration. For an initial concentration of humic acid, 10, 50 and 100ppm, the reaction rate constant by UV_(254) was 8.98×10 /min, 5.62×10^(-3) /min and 4.8×10^(-3)/min respectively due to the same flow rate of ionized gas. When we added activated carbon to the ionized gas for humic acid treatment, the reaction rate constant increased in 4.13, 3.65 and 3.15 times. So, by using activated carbon in treating humic acid by ionized gas, oxidation power of organic matter by ionized gas was increased. The hydrophobic fraction constitutes 98% of organic matter for humic acid at the beginning. After the treatment using ionized gas for humic acid, the hydrophobic fraction decreased by 63 -65% and the hydrophilic one increased by 35 -37%. So, it was proved that the treatment increased the hydrophilic fraction in organic matter.
저농도 하수가 유입되는 도시 하수처리장의 처리효율 개선에 관한 사례 연구
안익성 ( An Ig Seong ),정팔진 ( Jeong Pal Jin ),원찬희 ( Won Chan Hui ),조선영 ( Jo Seon Yeong ) 한국물환경학회 2003 한국물환경학회지 Vol.19 No.6
This research is carried out in full scale sewage plant in order to induce the most suitable condition of biological treatment which fits operation system of low concentration influent municipal sewage. However the research on extreme operating condition over the standard of discharged water(BOD:20㎎/ℓ) could not be done.(because this research was carried on real running plant) The experimental result of proper dewatered sludge will stabilize circular system of sewage plant(cake product:about 3.0ton/day) and it will contribute to the stabilization of aeration tank, the main treating process. The treatment plant have shown the tendency in lower concentration of influent about 55㎎/L(as BOD) with comparison to the originally designed Influent(150㎎/L as BOD). When the plant was run with MLSS as 1,000-3,500㎎/L for 5 months, F/M ratio over 0.1 was available for more effective management with all of SVI, SDI. and effluent BOD considered for the plant. The result of BOD-SS equivalent regression of effluence indicated that suitable operation of F/M ratio improve removal about 50% soluble effluent BOD.