aerobic granulation in sequencing batch reactors

... explanation without intent to infringe Library of Congress Cataloging -in- Publication Data Wastewater purification : aerobic granulation in sequencing batch reactors / editor, Yu Liu p cm Includes bibliographical ... mechanism of aerobic granulation in sequencing batch reactor (SBR) and its application in treating a wide variety of municipal and industrial wastewater Obviously, the basic research of aerobic granulation ... pressure-induced nitrifying granulation in sequencing batch reactors Appl Microbiol Biotechnol 59: 332–337 Tay, J H., Pan, S., He, Y X., and Tay, S T L 2004 Effect of organic loading rate on aerobic granulation...

Ngày tải lên: 18/06/2014, 16:20

... density of aerobic granular sludge increased linearly with shear force in a sequencing batch biofilter reactor, and a very high biomass density of 70 to 110 g VSS L –1 biomass was obtained in the ... conditions present in the SBR As shear force has an important role in aerobic granulation and granule stability, a minimum shear force seems necessary for aerobic granulation It should be pointed out ... Technological University, Singapore With permission.) 2.2 AEROBIC GRANULATION AT DIFFERENT SHEAR FORCES In a column-type sequencing batch reactor (SBR) commonly employed for cultivation of aerobic granules,...

Ngày tải lên: 18/06/2014, 16:20

... would result in the lowest selection pressure As a result, no nitrifying granulation was observed in the SBR run at the cycle time of 24 hours In fact, the absence of anaerobic granulation was ... mediate both cohesion and adhesion of cells and play a crucial role in building and further maintaining structure integrity in a community of immobilized cells (see chapter 10) Figure 3.14 displays ... leading to improved bacterial attachment to solid surfaces (Schmidt and Ahring 1996) In fact, extracellular polysaccharides are the key bounding material that interconnects individual cells into...

Ngày tải lên: 18/06/2014, 16:20

... settling time on aerobic granulation in sequencing batch reactor Biochem Eng J 21: 47–52 Qin, L., Liu, Y., and Tay, J H 2004b Selection pressure is a driving force of aerobic granulation in sequencing ... 53671_C004.indd & Francis Group, LLC 10/29/07 7:14:42 AM Aerobic Granulation at Different Settling Times 63 aerobic granulation In fact, absence of anaerobic granulation in the UASB reactors was ... settling time is still needed in order to obtain more detailed information 4.10 RATIONALE BEHIND SETTLING TIME-INITIATED AEROBIC GRANULATION Figure 4.3 shows that aerobic granules are dominant...

Ngày tải lên: 18/06/2014, 16:20

... sludge formation in upflow anaerobic sludge blanket (UASB) reactors Biotechnol Bioeng 49: 229–246 Wang, Z.-W 2007 Insights into the mechanism of aerobic granulation in sequencing batch reactor Ph.D ... different selection pressures in terms of minimum settling velocity of 0.6 and 0.7 m h–1 Even such a marginal difference in the minimum settling velocity could also result in distinct morphologies of ... exchange ratio in aerobic granulation in SBRs can be reasonably interpreted by the concept of minimum settling velocity, while the mechanism by which discharge time can influence aerobic granulation...

Ngày tải lên: 18/06/2014, 16:20

... trigger of aerobic granulation in SBRs 6.4.4 FEEDING STRATEGY McSwain, Irvine, and Wilderer (2004) reported that intermittent feeding is an effective operating strategy for enhancing aerobic granulation ... determine aerobic granulation in an SBR To develop a unified theory for aerobic granulation in SBRs, the role of discharge time in aerobic granulation should be taken into account seriously 6.5 MAIN ... 2004b Effect of settling time on aerobic granulation in sequencing batch reactor Biochem Eng J 21: 47–52 Renko, E K 1998 Modelling hindered batch settling II A model for computing solids profile...

Ngày tải lên: 18/06/2014, 16:20

... oxygen transfer in an aerobic granule-based sequencing batch reactor Biochem Eng J 25: 201–207 Su, K Z and Yu, H Q 2006 A generalized model for aerobic granule-based sequencing batch reactor I ... the formation of aerobic granules J Environ Eng 131: 86–92 Yang, S F., Liu, Q S., Tay, J H., and Liu, Y 2004 Growth kinetics of aerobic granules developed in sequencing batch reactors Lett Appl ... is generated in activated sludge culture In fact, abnormally high carbon dioxide production is a good indication of energy uncoupling in aerobic systems (Russell and Cook 1995) In a study on...

Ngày tải lên: 18/06/2014, 16:20

... the increase in the size of aerobic granules, indicating that the microbial activity inside aerobic granules is inhibited as the granule size increases Moreover, the specific growth rate of aerobic ... Characterization and evaluation of aerobic granules in a sequencing batch reactor J Biotechnol 105: 71–82 Laspidou, C S 2003 Modeling heterogeneous biofilms including active biomass, inert biomass and extracellular ... substrate and oxygen in aerobic granule Biochem Eng J 27: 45–52 Liu, Q S 2003 Aerobic granulation in a sequencing batch reactor Ph.D thesis, Nanyang Technological University, Singapore Liu, Y and...

Ngày tải lên: 18/06/2014, 16:20

... 2004 Selection pressure is a driving force of aerobic granulation in sequencing batch reactors Process Biochem 39: 579–584 Quarmby, J and Forster, C F 1995 An examination of the structure of UASB ... charge along with aerobic granulation in an SBR (Data from Li, Z H., Kuba, T., and Kusuda, T 2006 Enzyme Microb Technol 38: 670–674.) leading to aerobic granulation In fact, an inverse proportional ... To date, aerobic granulation phenomena have been observed only in SBRs, while no successful example of aerobic granulation has been reported in continuous culture Compared to a continuous culture,...

Ngày tải lên: 18/06/2014, 16:20

... fill in the intercellular spaces in the microcolonies present in aerobic granules (Jiang, Tay and Tay 2002; McSwain et al 2005) It is most likely that EPS plays an important role in maintaining ... (VSS) in seed sludge to 51.4 and 5.9 mg g–1 VSS in aerobic granular sludge These results seem to imply that EPS are not involved in aerobic granulation in this special case, but the reason behind ... Iaconi et al (2006) reported that the main component of EPS in aerobic granular biomass in a sequencing batch biofilter reactor was made of proteins, and proteinrich EPS would improve the stability...

Ngày tải lên: 18/06/2014, 16:20

... indicating a limiting number of live bacteria in the core part of the aerobic granule Similar observation was also reported by Toh et al (2003) and McSwain et al.(2005) In the study by McSwain ... basically biodegradable In view of the total amount of PS determined in the aerobic granule, it appears that the alpha- or beta-linked PS may not be the dominate constitution of EPS in aerobic granules ... white-stained PS was situated in the outer shell of the granule, with a depth of 400 µm below the granule surface (figure 11.11) These findings imply that the beta-linked PS are located mainly in the...

Ngày tải lên: 18/06/2014, 16:20

... shell of the aerobic granule (chapter 11) In fact, Toh et al (2003) investigated the viability of microflora residing inside aerobic granules using in situ DNA fluorescence staining, in which membrane ... the EPS produced in the feast phase would be used in the famine phase in order for microorganisms to overcome the energy constraint EPS biodegradation in the course of aerobic granulation was ... biomass in aerobic granules can be divided into active cells, inert biomass which includes bound EPS, attached organics, biomass residual and inorganic precipitation, and soluble EPS Assuming that aerobic...

Ngày tải lên: 18/06/2014, 16:20

... indicate that aerobic granulation may not depend on calcium ion, that is, calcium ion is not essential for aerobic granulation in SBRs Mahoney et al (1987) investigated anaerobic granulation in two ... play a very minor role in the microbial granulation process, and aerobic as well as anaerobic granulation is indeed calcium independent (Mahoney et al 1987; Jiang et al 2003) This point is also ... microbial aggregation during UASB reactor start-up Water Sci Technol 19: 249–260 Qin, L., Liu, Y., and Tay, J H 2004 Effect of settling time on aerobic granulation in a sequencing batch reactor Biochem...

Ngày tải lên: 18/06/2014, 16:20

... exist in the present literature 14.3 INFLUENCE OF SHORT STARVATION ON AEROBIC GRANULES To offer in- depth insights into the role of starvation in aerobic granulation, Z.-W Wang et al (2006) investigated ... found that aerobic granulation failed in the continuous activated sludge reactor, and aerobic granules were only developed in the SBR These findings imply that the periodic starvation-induced hydrophobicity ... governing factor in aerobic granulation in the SBR As shown in chapter 9, cell surface hydrophobicity plays a crucial role in the formation of biofilm and biogranules In a thermodynamic sense, increased...

Ngày tải lên: 18/06/2014, 16:20

... polymeric substances on aerobic granulation in sequencing batch reactors Chemosphere 63: 1728–1735 Wang, Z.-W 2007 Insights into mechanism of aerobic granulation in a sequencing batch reactor Ph.D ... OF AEROBIC FEEDING Aerobic granules are often cultivated in SBRs with a very short fill or feeding time McSwain, Irvine, and Wilderer (2004) investigated the effect of intermittent feeding on aerobic ... of aerobic granules in sequencing batch reactor (SBR) by seeding anaerobic granules Process Biochem 40: 5–11 Jenkins, D 1992 Towards a comprehensive model of activated-sludge bulking and foaming...

Ngày tải lên: 18/06/2014, 16:20

... growing organisms as a means for improving aerobic granular sludge stability Water Sci Technol 49: 9–17 Inizan, M., Freval, A., Cigana, J., and Meinhold, J 2005 Aerobic granulation in a sequencing ... stability of aerobic granules by selecting slow-growing nitrifying bacteria J Biotechnol 108: 161–169 Liu, Y Q and Tay, J H 2006 Variable aeration in sequencing batch reactor with aerobic granular ... applying different removal methods of sludge Enzyme Microb Technol 39: 976–981 Liu, Q.-S 2003 Aerobic granulation in a sequencing batch reactor Ph.D thesis, Nanyang Technological University, Singapore...

Ngày tải lên: 18/06/2014, 16:20

... PILOT-SCALE AEROBIC GRANULAR SLUDGE SBRS J H Tay et al (2004) investigated aerobic granulation in a pilot-scale SBR The pilot-scale aerobic granular sludge SBR was initiated by seeding mature aerobic ... A 1997 Aerobic granular sludge in a sequencing batch reactor Water Res 31: 3191–3194 Tay, J H., Liu, Q.-S., and Liu, Y 2001 Microscopic observation of aerobic granulation in sequential aerobic ... CONCLUSIONS Aerobic granulation in pilot-scale SBRs is an important step for its full application in the industrial-scale plant Aerobic granular sludge SBRs can be initiated by seeding either...

Ngày tải lên: 18/06/2014, 16:20

... Biotransformation of erythromycin by acclimated microorganisms in sequencing batch reactors (SBRs) Singapore International Water Week 2011 Singapore (accepted for presentation) xvii Chapter Introduction 1.1 ... 156 vi Summary In the 1940s, antibiotics were firstly applied as clinical medicine in treating infections Initially, the efficiency of antibiotics in killing pathogenic bacteria has ... supplies by killing or inhibiting competitors) (Hancock, 2005) These natural antibiotics were firstly introduced into the clinical practice in the 1940s, and were proved efficient in dealing with diseases...

Ngày tải lên: 10/09/2015, 15:51

... since batch reactors are often subject to large disturbances (caused by, e.g., incorrect reactor loading, fouling of internal heat exchange systems, nonideal mixing), modeling uncertainties, incomplete ... Computer Engineering National University of Singapore Engineering Drive Singapore 117576 Singapore Professor I Yamamoto Department of Mechanical Systems and Environmental Engineering Faculty ... of industrial control Thus, the real strength of industrial control engineering science lies in the universality of its techniques across application and industrial domains This Advances in Industrial...

Ngày tải lên: 01/04/2014, 10:59

... MẺ- SEQUENCING BATCH REACTOR (SBR) Giáo viên hƣớng dẫn TS BÙI XUÂN AN Sinh viên thực HUỲNH THỊ MỸ PHI Thành phố Hồ Chí Minh -2005 - iii LỜI CẢM ƠN Tôi xin chân thành cảm ơn Cha mẹ, người sinh ... động gián đoạn mẻ - Sequencing Batch Reactor (SBR) 2.2.4.1 Nguyên tắc hoạt động Aerotank hoạt động gián đoạn theo mẻ (Sequencing Batch Reactor- SBR) dạng công trình xử lý sinh học nước thải bùn ... tan Cao Xử lý sinh học kỵ khí (BOD5>500 mg/l) Trung bình Xử lý sinh học bùn hoạt tính (BOD5= 300-500 mg/l) Thấp Xử lý sinh học bùn hoạt tính (BOD5

Ngày tải lên: 16/11/2012, 16:11