AI SearchApplication of the floto filter unit for contact flocculation filtration of surface waters (Record no. 6880)
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| 000 -LEADER | |
|---|---|
| fixed length control field | 03879cas|a2200421 i 4500 |
| 005 - DATE AND TIME OF LATEST TRANSACTION | |
| control field | 20260817162954.0 |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION | |
| fixed length control field | 230399s1993 th uzm rtt 00| a1eng d |
| 035 ## - SYSTEM CONTROL NUMBER | |
| System control number | .b10089238 |
| 099 #9 - LOCAL FREE-TEXT CALL NUMBER (OCLC) | |
| Classification number | AIT Thesis no.EV-93-26 |
| 100 1# - MAIN ENTRY--PERSONAL NAME | |
| Personal name | Werellagama, D. R. Induka B. |
| 245 10 - TITLE STATEMENT | |
| Title | Application of the floto filter unit for contact flocculation filtration of surface waters |
| 260 ## - PUBLICATION, DISTRIBUTION, ETC. | |
| Place of publication, distribution, etc. | Bangkok : |
| Name of publisher, distributor, etc. | Asian Institute of Technology, |
| Date of publication, distribution, etc. | 1993 |
| 300 ## - PHYSICAL DESCRIPTION | |
| Extent | 141 leaves + |
| Accompanying material | 1 online resource |
| 490 1# - SERIES STATEMENT | |
| Series statement | Thesis ; |
| Volume/sequential designation | no. EV-93-26 |
| 500 ## - GENERAL NOTE | |
| General note | A thesis submitted in partial fulfillment of the requirement for the degree of Master of Engineering |
| 502 ## - DISSERTATION NOTE | |
| Dissertation note | Thesis (M.Eng.) - Asian Institute of Technology, 1993 |
| 520 ## - SUMMARY, ETC. | |
| Summary, etc. | Laboratory scale experiments were carried out in contact flocculation filtration using a dual media filter. The objective of the research was to find an optimum synthetic media combination which would give acceptable quality water under varying conditions while maintaining a low headloss. The media was lighter than water hence the bed was floating. Since coarse media remained at the bottom the flow direction was upflow which had the added advantage that the flow was in the direction of grain compression. Polypropylene and Polystyrene were selected as the optimum combination of media which due to their large . density difference did not intermix even under severe agitation. Spherical fine media performed better than angular fine media giving lower headloss and better effluent quality. The dual media combination and the higher rates of filtration are in line with the current trends in the water industry. The influent concentrations were kept constant and the flow velocity and filter media size were varied. The headloss variation along the filter, the influent quality to the two filter layers and the effluent quality were studied. The filter performed for over 40 hours producing acceptable quality water at conventional rapid sand filtration rates, also having low headloss development. Another major advantage was the ease and economy in backwashing. The filter media did not mix even during or after backwashing, thereby eliminating the most common problem encountered in conventional multi media filters. The Floto Filter operation was compared with upflow sand filtration. The headloss development curves for Floto filter showed a characteristic shape easily identifiable from that for sand. The existing mathematical model was able to predict the headloss profile but the concentration profile was not predicted. The necessity of particle size data for mathematical modelling of filtration of heterodisperse suspensions is emphasized. |
| 650 #0 - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name entry element | Water |
| General subdivision | Purification |
| -- | Filtration |
| 700 1# - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Visvanathan, C., |
| Relator term | Chairperson |
| 700 1# - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Fujii, Shigeo, |
| Relator term | Examination committee |
| 700 0# - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Samorn Muttamara, |
| Relator term | Examination Committee |
| 710 2# - ADDED ENTRY--CORPORATE NAME | |
| Corporate name or jurisdiction name as entry element | Swedish International Development Agency (SIDA), |
| Relator term | Scholarship donor |
| 810 2# - SERIES ADDED ENTRY--CORPORATE NAME | |
| Corporate name or jurisdiction name as entry element | Asian Institute of Technology. |
| Title of a work | Thesis ; |
| Volume/sequential designation | no. EV-93-26 |
| 856 ## - ELECTRONIC LOCATION AND ACCESS | |
| Materials specified | Full-Text |
| Uniform Resource Identifier | <a href="http://203.159.5.9/ait-thesis/detail.php?q=B16676">http://203.159.5.9/ait-thesis/detail.php?q=B16676</a> |
| 907 ## - LOCAL DATA ELEMENT G, LDG (RLIN) | |
| a | .b10089238 |
| b | mnait |
| c | x |
| 902 ## - LOCAL DATA ELEMENT B, LDB (RLIN) | |
| a | 240411 |
| 998 ## - LOCAL CONTROL INFORMATION (RLIN) | |
| Operator's initials, OID (RLIN) | 2 |
| Cataloger's initials, CIN (RLIN) | 951012 |
| First date, FD (RLIN) | m |
| -- | a |
| -- | x |
| -- | 0 |
| 945 ## - LOCAL PROCESSING INFORMATION (OCLC) | |
| l | mnait |
| 945 ## - LOCAL PROCESSING INFORMATION (OCLC) | |
| l | mnait |
| 945 ## - LOCAL PROCESSING INFORMATION (OCLC) | |
| l | mnarc |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) | |
| Koha item type | 20-AIT Publication |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) | |
| Koha item type | 22-AIT Thesis (Replacement) |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) | |
| Koha item type | 40-Archives |
| 909 ## - LOCAL ITEMS USED | |
| Barcode | Barcode : 30050120806087 |
| CREATED | CREATED : 1994-05-16 |
| RECORD Id | RECORD # : i10095366 |
| LPATRON | LPATRON : 0 |
| LCHKIN | LCHKIN : - |
| RENEWALS | # RENEWALS : 0 |
| -- | # OVERDUE : 0 |
| -- | IUSE3 : 0 |
| -- | TOT CHKOUT : 0 |
| -- | TOT RENEW : 0 |
| 909 ## - LOCAL ITEMS USED | |
| Barcode | Barcode : a |
| CREATED | CREATED : 1995-10-13 |
| RECORD Id | RECORD # : i10095378 |
| LPATRON | LPATRON : 0 |
| LCHKIN | LCHKIN : - |
| RENEWALS | # RENEWALS : 0 |
| -- | # OVERDUE : 0 |
| -- | IUSE3 : 0 |
| -- | TOT CHKOUT : 0 |
| -- | TOT RENEW : 0 |
| 909 ## - LOCAL ITEMS USED | |
| Barcode | Barcode : 30050160055728 |
| CREATED | CREATED : 2016-11-05 |
| RECORD Id | RECORD # : i12975187 |
| LPATRON | LPATRON : 0 |
| LCHKIN | LCHKIN : - |
| RENEWALS | # RENEWALS : 0 |
| -- | # OVERDUE : 0 |
| -- | IUSE3 : 0 |
| -- | TOT CHKOUT : 0 |
| -- | TOT RENEW : 0 |
| Withdrawn status | Lost status | Damaged status | Not for loan | Home library | Current library | Shelving location | Date acquired | Cost, normal purchase price | Total checkouts | Full call number | Barcode | Date last seen | Copy number | Price effective from | Koha item type |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Available for Loans | Asian Institute of Technology Library | Asian Institute of Technology Library | AIT Publications | 17/08/2026 | 10.00 | AIT Thesis no.EV-93-26 | 30050120806087 | 17/08/2026 | 1 | 17/08/2026 | 20-AIT Publication | ||||
| Available for Loans | Asian Institute of Technology Library | Asian Institute of Technology Library | Archives | 17/08/2026 | AIT Thesis no.EV-93-26 | 30050160055728 | 17/08/2026 | 17/08/2026 | 40-Archives |