The Experts below are selected from a list of 294 Experts worldwide ranked by ideXlab platform
Andrew Forbes Alexander Hoadley - One of the best experts on this subject based on the ideXlab platform.
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benefit of lignite as a Filter Aid for dewatering of digested sewage sludge demonstrated in pilot scale trials
Chemical Engineering Journal, 2011Co-Authors: Khagendra Bahadur Thapa, Andrew Forbes Alexander HoadleyAbstract:Abstract Lignite, a low-rank coal, was investigated as a Filter Aid for the dewatering of digested sewage sludge at a pilot scale using a plate-and-frame Filter press. When the lignite was used to condition the sludge at solids mass ratios of 0.5 to 1 and 1 to 1, the Net Sludge Yield (YN) was found to increase from 1.2 kg m−2 h−1 without lignite conditioning to 5.2 and 7.8 kg m−2 h−1, respectively. Higher doses of the lignite did not result in further increases in the sludge yield due to the low mass fraction of the sludge solids in the cake. The Filterability of lignite-conditioned sludge as affected by the flocculant dose was evaluated using Specific Resistance to Filtration (SRF) as well as percentage sludge water removal and product solids content. Flocculation using ZETAG7501 at 19 kg/tonne reduced the SRF from 5.8 × 1013 at 11 kg/tonne to 9.3 × 1012. Using the high molecular weight polymer ZETAG8125 at 13 kg/tonne achieved similar sludge water removal compared with using ZETAG7501 at 19 kg/tonne and even lower specific resistance. The improvement in sludge dewaterability by lignite conditioning confirmed the results from laboratory scale studies.
Huijuan Liu - One of the best experts on this subject based on the ideXlab platform.
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treatment of low turbidity source water by permanganate pre oxidation in situ formed hydrous manganese dioxide as Filter Aid
Separation and Purification Technology, 2013Co-Authors: Ruiping Liu, Lihua Sun, Huijuan LiuAbstract:This pilot study investigated the effects of in situ formed manganese dioxide (in situ delta MnO2), produced from KMnO4 reduction, on the removal efficiency for turbidity and particles and the run length of Filters through this pilot-scale study. The sedimentation effluent showed an insignificant difference in turbidity but a remarkable decrease in particle concentration after dosing KMnO4. The residual particle concentration decreased from 1504 units/mL to 359, 302, 164 units/mL in the anthracite Filter effluent and from 994 units/mL to 219, 134, 99 units/mL in the granular activated carbon (GAC) effluent at KMnO4 dosages of 0.2, 0.3, and 0.4 mg/L respectively. However, this effect was achieved at the expense of a rapid increase of water head loss (WHL), and the average run length decreased from 70 h to 54, 52, and 48 h accordingly. After dosing KMnO4 at 0.2, 0.3, and 0.4 mg/L, the contributive ratios of the uppermost 200 mm layers on WHL increased from 68.5% to 81.9%, 76.0%, and 82.2%, respectively. (C) 2013 Elsevier B.V. All rights reserved.
Khagendra Bahadur Thapa - One of the best experts on this subject based on the ideXlab platform.
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benefit of lignite as a Filter Aid for dewatering of digested sewage sludge demonstrated in pilot scale trials
Chemical Engineering Journal, 2011Co-Authors: Khagendra Bahadur Thapa, Andrew Forbes Alexander HoadleyAbstract:Abstract Lignite, a low-rank coal, was investigated as a Filter Aid for the dewatering of digested sewage sludge at a pilot scale using a plate-and-frame Filter press. When the lignite was used to condition the sludge at solids mass ratios of 0.5 to 1 and 1 to 1, the Net Sludge Yield (YN) was found to increase from 1.2 kg m−2 h−1 without lignite conditioning to 5.2 and 7.8 kg m−2 h−1, respectively. Higher doses of the lignite did not result in further increases in the sludge yield due to the low mass fraction of the sludge solids in the cake. The Filterability of lignite-conditioned sludge as affected by the flocculant dose was evaluated using Specific Resistance to Filtration (SRF) as well as percentage sludge water removal and product solids content. Flocculation using ZETAG7501 at 19 kg/tonne reduced the SRF from 5.8 × 1013 at 11 kg/tonne to 9.3 × 1012. Using the high molecular weight polymer ZETAG8125 at 13 kg/tonne achieved similar sludge water removal compared with using ZETAG7501 at 19 kg/tonne and even lower specific resistance. The improvement in sludge dewaterability by lignite conditioning confirmed the results from laboratory scale studies.
Mamiko Ogaki - One of the best experts on this subject based on the ideXlab platform.
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Study on Extraction Conditions of Water-Soluble Substances—Purity Test (4) for Polyvinylpolypyrrolidone Listed in Japan's Specifications and Standards for Food Additives
Journal of The Food Hygienic Society of Japan (shokuhin Eiseigaku Zasshi), 2015Co-Authors: Tokue Yanagi, Makoto Matsumoto, Sachiko Shimizu, Tetsuro Iwamura, Mamiko OgakiAbstract:The food additive polyvinylpolypyrrolidone is approved for use as a Filter Aid. The water-soluble substances test of polyvinylpolypyrrolidone often shows poor reproducibility. The instruction "boil gently while stirring using a stirrer" was considered critical, and so this issue was examined. The results showed that the use of a combination of both an oil bath and a stirrer provided good reproducibility without decomposition or other problems.
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study on extraction conditions of water soluble substances purity test 4 for polyvinylpolypyrrolidone listed in japan s specifications and standards for food additives
Journal of The Food Hygienic Society of Japan (shokuhin Eiseigaku Zasshi), 2015Co-Authors: Tokue Yanagi, Makoto Matsumoto, Sachiko Shimizu, Tetsuro Iwamura, Mamiko OgakiAbstract:The food additive polyvinylpolypyrrolidone is approved for use as a Filter Aid. The water-soluble substances test of polyvinylpolypyrrolidone often shows poor reproducibility. The instruction "boil gently while stirring using a stirrer" was considered critical, and so this issue was examined. The results showed that the use of a combination of both an oil bath and a stirrer provided good reproducibility without decomposition or other problems.
Ruiping Liu - One of the best experts on this subject based on the ideXlab platform.
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treatment of low turbidity source water by permanganate pre oxidation in situ formed hydrous manganese dioxide as Filter Aid
Separation and Purification Technology, 2013Co-Authors: Ruiping Liu, Lihua Sun, Huijuan LiuAbstract:This pilot study investigated the effects of in situ formed manganese dioxide (in situ delta MnO2), produced from KMnO4 reduction, on the removal efficiency for turbidity and particles and the run length of Filters through this pilot-scale study. The sedimentation effluent showed an insignificant difference in turbidity but a remarkable decrease in particle concentration after dosing KMnO4. The residual particle concentration decreased from 1504 units/mL to 359, 302, 164 units/mL in the anthracite Filter effluent and from 994 units/mL to 219, 134, 99 units/mL in the granular activated carbon (GAC) effluent at KMnO4 dosages of 0.2, 0.3, and 0.4 mg/L respectively. However, this effect was achieved at the expense of a rapid increase of water head loss (WHL), and the average run length decreased from 70 h to 54, 52, and 48 h accordingly. After dosing KMnO4 at 0.2, 0.3, and 0.4 mg/L, the contributive ratios of the uppermost 200 mm layers on WHL increased from 68.5% to 81.9%, 76.0%, and 82.2%, respectively. (C) 2013 Elsevier B.V. All rights reserved.