AI SearchMembrane as air diffuser and solid/liquid separator in a bioreactor for domestic wastewater treatment (Record no. 75034)
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| 000 -LEADER | |
|---|---|
| fixed length control field | 04064nam a2200385 4500 |
| 005 - DATE AND TIME OF LATEST TRANSACTION | |
| control field | 20260818154840.0 |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION | |
| fixed length control field | th eng |
| 035 ## - SYSTEM CONTROL NUMBER | |
| System control number | .b11687046 |
| 099 #9 - LOCAL FREE-TEXT CALL NUMBER (OCLC) | |
| Classification number | AIT Thesis no. EV-97-32 |
| 100 1# - MAIN ENTRY--PERSONAL NAME | |
| Personal name | Parameshwaran, Kathiravelu |
| 245 10 - TITLE STATEMENT | |
| Title | Membrane as air diffuser and solid/liquid separator in a bioreactor for domestic wastewater treatment |
| 260 ## - PUBLICATION, DISTRIBUTION, ETC. | |
| Place of publication, distribution, etc. | Bangkok : |
| Name of publisher, distributor, etc. | Asian Institute of Technology, |
| Date of publication, distribution, etc. | 1997 |
| 300 ## - PHYSICAL DESCRIPTION | |
| Extent | 126 leaves |
| 490 1# - SERIES STATEMENT | |
| Series statement | Thesis ; |
| Volume/sequential designation | no. EV-97-32 |
| 500 ## - GENERAL NOTE | |
| General note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science, School of Environment, Resources and Development |
| 502 ## - DISSERTATION NOTE | |
| Dissertation note | Thesis (M.Eng.) - Asian Institute of Technology, 1997 |
| 520 ## - SUMMARY, ETC. | |
| Summary, etc. | The possibility of using microfiltration hollow fiber membrane modules as air diffusers and solid/liquid separator in an alternative cycle for activated sludge process treating domestic wastewater was studied. The activated sludge system consist of anoxic and oxic zone for better nitrogen removal. Two hollow fiber microfiltration modules with the pore size of 0.2 æm were immersed in a 80 L oxic tank (.MBR) to effect the direct solid/liquid separation. Filtration and high pressure air backwashing were employed in an alternative cycle to have improved flux rate. Back washing of membrane with air in turn aerate the activated sludge in the reactor. By doing so, distinct advantages of declogging of membranes as well as aerating reactor contents were achieved simultaneously. In a short term experimental runs, it was found membrane modules are better air diffusers than stone air diffusers. It was also found that the increased back wash air pressure lead to an improved flux rate. In long term experiments, efficiency of membrane coupled bioreactor system at different hydraulic retention times (HRT) of 15, 10, 6 and 3 hours were studied. Wastewater was fed to the anoxic tank which in turn pass into the .MBR. Content of the .MBR was recycled to anoxic tank to effect denitrification. The average IvfLSS concentration in the system was varying between 12,000 to 14,000 mg/Land the sludge age in the .MBR was maintained at 50 days through out the study. Though the desired HRT could be maintained at 15, 10 and 6 h with a moderate transmembrane pressure only ( < 42 kPa) it was not possible in the case of 3 h. After two weeks operation in later case, stable HRT of 8.5 h at 96 kPa transmembrane pressure, could be obtained. Irrespective of the operating conditions, in all experiments COD, BOD, TKN and total nitrogen removal of more than 95, 98, 95 and 80 % respectively were achieved. This study establishes that using hollow fiber membrane capable of air backwashing to solid/liquid separation will lead to a situation of aeration of mixed liquor and declogging of membrane modules simultaneously, so conventional aerators can be eliminated. By using anoxic/oxic system efficient total nitrogen removal also can be achieved. |
| 650 10 - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name entry element | Sewage |
| General subdivision | Purification |
| -- | Reverse osmosis process |
| 700 1# - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Visvanathan, C., |
| Relator term | Chairperson |
| 700 1# - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Eckhardt, Ing. Heinz, |
| Relator term | Examination committee |
| 700 0# - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Sompol Boonthanon, |
| Relator term | Examination committee |
| 710 2# - ADDED ENTRY--CORPORATE NAME | |
| Corporate name or jurisdiction name as entry element | Swedish International Development Cooperation 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-97-32 |
| 856 ## - ELECTRONIC LOCATION AND ACCESS | |
| Materials specified | Full-Text |
| Uniform Resource Identifier | <a href="http://203.159.5.9/ait-thesis/detail.php?q=B13926">http://203.159.5.9/ait-thesis/detail.php?q=B13926</a> |
| 907 ## - LOCAL DATA ELEMENT G, LDG (RLIN) | |
| a | .b11687046 |
| b | mnait |
| c | y |
| 902 ## - LOCAL DATA ELEMENT B, LDB (RLIN) | |
| a | 240403 |
| 998 ## - LOCAL CONTROL INFORMATION (RLIN) | |
| Operator's initials, OID (RLIN) | 0 |
| Cataloger's initials, CIN (RLIN) | 971211 |
| First date, FD (RLIN) | m |
| -- | a |
| -- | y |
| -- | 0 |
| 945 ## - LOCAL PROCESSING INFORMATION (OCLC) | |
| l | mnait |
| 945 ## - LOCAL PROCESSING INFORMATION (OCLC) | |
| l | mnarc |
| 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 : 30050120600332 |
| CREATED | CREATED : 2012-12-17 |
| RECORD Id | RECORD # : i12722248 |
| LPATRON | LPATRON : 1026967 |
| LCHKIN | LCHKIN : 2018-02-05 |
| RENEWALS | # RENEWALS : 0 |
| -- | # OVERDUE : 0 |
| -- | IUSE3 : 0 |
| -- | TOT CHKOUT : 3 |
| -- | TOT RENEW : 12 |
| 909 ## - LOCAL ITEMS USED | |
| Barcode | Barcode : 30050160078282 |
| CREATED | CREATED : 2016-05-23 |
| RECORD Id | RECORD # : i12986744 |
| 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 | 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 | 18/08/2026 | AIT Thesis no. EV-97-32 | 30050120600332 | 18/08/2026 | 3 | 18/08/2026 | 22-AIT Thesis (Replacement) | ||||
| Available for Loans | Asian Institute of Technology Library | Asian Institute of Technology Library | Archives | 18/08/2026 | AIT Thesis no. EV-97-32 | 30050160078282 | 18/08/2026 | 18/08/2026 | 40-Archives |