Vol 3 No 2 (2018)最新文献

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英文中文

Protein Separation Using Fly-ash Microfiltration Ceramic Membrane 粉煤灰微滤陶瓷膜分离蛋白质的研究

Vol 3 No 2 (2018) Pub Date : 2018-09-01 DOI: 10.30732/IJBBB.20180302002

Vandana Gupta, J. Anandkumar

{"title":"Protein Separation Using Fly-ash Microfiltration Ceramic Membrane","authors":"Vandana Gupta, J. Anandkumar","doi":"10.30732/IJBBB.20180302002","DOIUrl":"https://doi.org/10.30732/IJBBB.20180302002","url":null,"abstract":"In this study, separation of protein (bovine serum albumin (BSA)) was carried out by ceramic microfiltration membranes. Ceramic membranes were fabricated by using fly-ash with different proportion (2-8 wt%) of fuller clay and fraction (20 wt%) of inorganic additives. Synthesized ceramic membranes were characterized using scanning electron microscope, X-ray diffraction analysis, mechanical-chemical stability, porosity and pure water flux. It was observed that the mechanical and chemical stability of ceramic membrane increases with increase in fuller clay’s content. Ceramic membrane with 8% fuller clay (C4) exhibited maximum flexural strength of 20 MPa. C4 membrane also shows least porosity of 29.9%, permeability of 0.397 L m-2h-1kPa-1, 20.15% water uptake capacity and 0.428 μm average pore radius. The BSA rejection efficiency of C4 membrane was studied for different operating parameter such as feed concentration (200-1000 mg/L), feed pH (2-10) and applied pressure (68-482 kPa). Maximum BSA rejection (82%) and flux (81 L m-2 h-1) has been observed at optimized condition (208 kPa, natural pH and 200 mg/L concentration). The results obtained in this work indicate that synthesized membrane could be used as proficient microfiltration membrane for protein rejection applications.","PeriodicalId":290882,"journal":{"name":"Vol 3 No 2 (2018)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126628799","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Landfill gases: Characteristics and treatment 垃圾填埋气体:特性和处理

Vol 3 No 2 (2018) Pub Date : 2018-09-01 DOI: 10.30732/IJBBB.20180302003

Ashfaque Ahmad, P. Sahu, B. P. Sahariah

引用次数: 0

External Nutrient Load and Determination of the Trophic Status of Lake Ziway 紫卫湖外部养分负荷与营养状况测定

Vol 3 No 2 (2018) Pub Date : 2018-09-01 DOI: 10.30732/IJBBB.20180302001

Dessie Tibebe, F. Z. Beshah, B. Lemma, Yezbie Kassa, A. Bhaskarwar

{"title":"External Nutrient Load and Determination of the Trophic Status of Lake Ziway","authors":"Dessie Tibebe, F. Z. Beshah, B. Lemma, Yezbie Kassa, A. Bhaskarwar","doi":"10.30732/IJBBB.20180302001","DOIUrl":"https://doi.org/10.30732/IJBBB.20180302001","url":null,"abstract":"Lake Ziway is shallow freshwater located in Northern part of Ethiopian Rift Valley. Expansions of the flower industry, fisheries, intensive agricultural activities, fast population growth lead to deterioration of water quality and depletion of aquatic biota. The objectives of the present study are to evaluate the spatial and temporal variations in the external nutrient load and determine the trophic status of Lake Ziway in 2014 and 2015. The nutrients and Chlorophyll-a were measured according to the standard procedures outlined in APHA, 1999. From the result Ketar and Meki Rivers catchment showed the major sources of external nutrient loads to the lake ecosystem. The mean external soluble reactive phosphorus (SRP), total phosphorus (TP), total inorganic nitrogen (TIN) and total nitrogen (TN) loads to Lake Ziway were 230, 2772, 4925 and 24016 kg day-1, respectively. A general trend which was expected that the nutrient loads would be much higher in rainy season than in dry season. The mean concentrations of trophic state variables for TN, TP and Chla were 6700, 212 and 42 mg L-1, respectively. The mean values of TSI-TP, TSI-Chl-a, TSI-TN and TSI-SD were 79, 66, 81 and 83, respectively and the overall evaluation of Carlson Trophic State Index (CTSI) of Lake Ziway was 77. Therefore, the lake is under eutrophic condition. The mean values of TN: TP ratio was 48 which were very high. The trophic state index determined with chlorophyll-a showed lower value than those determined with all trophic state indices values of TN, TP, and SD which indicated that non-algal turbidity affected light attenuation for algal growth. This suggested that phosphorus was the limiting nutrient in Lake Ziway. Due to its importance as being the lake is an intensive agricultural site, management solutions must be urgently developed in order to avoid the destruction of the lake.","PeriodicalId":290882,"journal":{"name":"Vol 3 No 2 (2018)","volume":"160 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128627901","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5