• Carbon letters
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• 제6권3호
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• pp.166-172
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• 2005

The objective of this study was to investigate the possibility of application for water treatment using the zeocarbon. The zeocarbon was mixture of zeolite and activated carbon. In general, the application of commercial zeocarbon to water treatment is difficult because of weak strength in water and the high pH value of effluents after water treatment. Therefore, we have modified the surface of zeocarbon. For the surface modification, we used the acid treatment to make surface functional group. As a result of modification, was created functional group on zeocarbon surface and was formed mesopore in zeocarbon. The surface modified zeocarbon was applied to removal of nitrogen. In removal experiments of nitrogen, removal efficiency was very high. And, strength of zeocarbon after water treatment and pH of effluents were stabilized. This indicates that the surface modified zeocarbon was easy to recover and reuse. Consequently, our results were shown the possibility of application for water treatment using the surface modified zeocarbon.

• Carbon letters
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• 제11권2호
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• pp.112-116
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• 2010

The objective of this study was to evaluate the possibility of simultaneous removal of ammonium, nitrate and phosphorus in water using the zeocarbon. In this study, the surface of zeocarbon was modified by acid because of difficulty in application of water treatment. After surface modification, the strength was enhanced about 62% higher than that of original one. The removal efficiency of ammonium and nitrate using the modified zeocarbon was about 47% and 32%, respectively and were higher than that of zeocarbon. In batch type experiment on the simultaneous removal of ammonium, nitrate and phosphorus, the presence of phosphorus did not have influence on nitrogen removal efficiency. Concomitantly, removal efficiency of phosphorus was obtained was about 35%. This indicates that the surface modified zeocarbon can be applied for simultaneous removal of nitrogen and phosphorus. Consequently, our results could be used as basic data to design of one-stage nitrogen/phosphorus simultaneous removal system.

• 한국미생물·생명공학회지
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• 제30권1호
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• pp.73-78
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• 2002

4 종류의 무기담채와 지렁이 분변토를 담채로 사용하여 분변토 집식배양한 질산화 세균을 접종한 바이오필터의 암모니아 제거 특성을 규명하였다. 담채의 암모니아 흡착능은 zcocarbn(24g-NH3/kg)을 제외하고 무시할 수준이었으며, 충전부피 당 담체의 미생물 고정화량은 담채 종류와 관계없이 유사하였다. 바이오필터의 압력손실은 분변토 $\geq$ zeocarbon $\geq$ zeolite $\geq$ porous glass $\simeqporous $ 순이었다. 담체의 충전 부피를 기준으로 한 최대 제거용량($g-Nkg^{-1}$$d^{-1}$)은 zeocarbon (526) $\geq$ 분변토 (220) $\geq$ porous celite (93) > Zeolite (68) > porous glass (53) 순으로 바이오필터의 성능은 담체에 많은 영향을 받는 것을 확인할 수 있었다. 속도론적 해석에 의해 $V_{m}$과 $K_{s}$를 구하였으며, 담체들간의 암모니아 제거 성능을 고려할 때 가장 우수한 담체는 zeocarbon 이었다.

• 대한환경공학회지
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• 제27권1호
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• pp.109-114
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• 2005

본 연구에서는 기상용 제오카본을 수처리에 적합하도록 염산으로 표면 개질 하였으며, 개질된 제오카본을 이용하여 단일 공정을 통한 암모니아성 질소와 질산성 질소 동시 제거 가능성을 평가하고자 하였다. 제오카본과 비교하여 표면 개질 제오카본의 강도가 62% 정도 증가하였으며, 암모니아성 질소와 질산성 질소 및 총질소 제거율이 약 2배 증가하였다. 또한 암모니아성 질소와 질산성 질소 제거 효율은 pH 및 온도 변화에 거의 영향을 받지 않았다. 따라서 수중에 존재하는 암모니아성 질소와 질산성 질소의 동시 제거가 매우 효과적으로 이루어질 수 있었으며, 본 연구 결과를 토대로 암모니아성 질소와 질산성 질소를 동시 제거할 수 있는 단일 공정 설계를 위한 기본 데이터 제시가 가능하였다.

• 한국환경과학회지
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• 제17권1호
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• pp.7-17
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• 2008

Simultaneous removal of $NH_3,\;H_2S$ and toluene in a contaminated air stream was investigated over 185 days in a biofilter packed with Zeocarbon granule as microbial support. In this study, multi-microorganisms including Nitrosomonas and Nitrobacter for nitrogen removal, Thiobacillus thioparus (ATCC 23645) for $H_2S$ removal, and Pseudomonas aeruginosa (ATCC 15692), Pseudomonas putida (ATCC 17484) and Pseudomonas putida (ATCC 23973) for toluene removal were used simultaneously. The empty bed residence time (EBRT) was 40-120 seconds and the feed (inlet) concentrations of $NH_3,\;H_2S$ and toluene were 0.02-0.11, 0.05-0.23 and 0.15-0.21 ppmv, respectively. The observed removal efficiency was 85%-99% for $NH_3$, 100% for $H_2S$, and 20-90% for toluene, respectively. The maximum elimination capacities were 9.3, 20.6 and $17g/m^3/hr\;for\;NH_3,\;H_2S$ and toluene, respectively. The results of kinetic model analysis showed that there were no particular evidences of interactions or inhibitions among the microorganisms, and that the three bio degradation reactions took place independently within a finite area of biofilm developed on the surface of the Zeocarbon carrier.

• Nuclear Engineering and Technology
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• 제32권5호
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• pp.504-513
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• 2000

The adsorption characteristics of methyl iodide generated from the simulated off-gas stream on various adsorbents such as silver ion-exchanged zeolite (AgX), zeocarbon and activated carbon were investigated. An extensive evaluation was made on the optimal silver ion-exchanged level for the effective removal of methyl iodide at temperature up to 38$0^{\circ}C$. The degree of adsorption efficiency of methyl iodide on silver ion-exchanged zeolite is strongly dependent of silver ion-amount and process temperature. The influence of temperature, methyl iodide concentration and silver ion-exchanged level on the adsorption efficiency is closely related to the pore characteristics of adsorbents. It would be facts that the effective silver ion-exchanged level was about 10 wt%, based on the degree of silver utilization for the removal of methyl iodide.