http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Upgrading of anaerobic digestion by incorporating two different hydrolysis processes
Park, Chulhwan,Lee, Chunyeon,Kim, Sangyong,Chen, Yu,Chase, Howard A. Elsevier 2005 Journal of bioscience and bioengineering Vol.100 No.2
<P>The purpose of this study was to increase the efficiency of anaerobic digestion of waste activated sludge (WAS). Either thermochemical or biological hydrolysis was used as a pretreatment and the effects of both were investigated and compared. Two different three-stage digestion systems showed improved performance, although thermochemical hydrolysis showed better results than biological hydrolysis in a bench-scale operation. After anaerobic digestion with thermochemical pretreatment, the total chemical oxygen demand (tCOD) reduction, volatile solid (VS) reduction, methane yield and methane biogas content were 88.9%, 77.5%, 0.52 m<SUP>3</SUP>/kg VS and 79.5%, respectively. These results should help in determining the best hydrolysis pretreatment process for anaerobic digestion and in improving the design and operation of the large-scale treatment of WAS by anaerobic digestion with hydrolysis systems.</P>
Decolorization of acid black 52 by fungal immobilization
Park, Chulhwan,Lee, Byunghwan,Han, Eun-Jung,Lee, Jinwon,Kim, Sangyong Elsevier 2006 Enzyme and microbial technology Vol.39 No.3
<P><B>Abstract</B></P><P>In order to achieve an effective decolorization with <I>Funalia trogii</I>, fungal immobilization and repeated batch experiment were investigated. The activities of three enzymes, namely laccase, lignin peroxidase (LiP) and manganese peroxidase (MnP), were reported during decolorization of acid black 52 under the condition of immobilized and suspended fungal mycelia. When <I>F. trogii</I> were immobilized in Na-alginate, the cell viability increased as alginate concentration was increased, although the cell concentration decreased. Na-alginate of 4% (w/v) was an optimum concentration. Decolorization rate by fungal immobilization was higher than that by suspended cultivation. Decolorization could be stably maintained with the repeated batch experiments during long period (at least for 300h).</P>
Chulhwan PARK 한국생물공학회 2021 한국생물공학회 학술대회 Vol.2021 No.4
The biorefinery is well known platform that converts various biomass to value-added products (bioenergy, biochemical and biomaterial etc.). Various applications such as selection of biomass, optimization of pretreatment, improvement of process efficiency and design of hybrid process can be applied for the sustainable utilization of biomass. In this presentation, the following four categories will be presented briefly; (1) bioenergy and biochemical production from lignocellulosic biomass, (2) enzymatic coproduction of value-added products from vegetable oil, (3) formate ester production based on C1 gas, and (4) process design and evaluation for value-added chemicals production.