AI SearchDesign parameters for oxidation ditches in the tropics (Record no. 27584)
[ view plain ]
| 000 -LEADER | |
|---|---|
| fixed length control field | 03322nam a2200397 4500 |
| 005 - DATE AND TIME OF LATEST TRANSACTION | |
| control field | 20260818090310.0 |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION | |
| fixed length control field | 241297 th eng |
| 035 ## - SYSTEM CONTROL NUMBER | |
| System control number | .b10192657 |
| 099 #9 - LOCAL FREE-TEXT CALL NUMBER (OCLC) | |
| Classification number | AIT Thesis no. 643 |
| 100 1# - MAIN ENTRY--PERSONAL NAME | |
| Personal name | Yau, Chap Hoi |
| 245 10 - TITLE STATEMENT | |
| Title | Design parameters for oxidation ditches in the tropics |
| 260 ## - PUBLICATION, DISTRIBUTION, ETC. | |
| Place of publication, distribution, etc. | Bangkok : |
| Name of publisher, distributor, etc. | Asian Institute of Technology, |
| Date of publication, distribution, etc. | 1974 |
| 300 ## - PHYSICAL DESCRIPTION | |
| Extent | 56 p. |
| 490 1# - SERIES STATEMENT | |
| Series statement | Thesis ; |
| Volume/sequential designation | no. 643 |
| 500 ## - GENERAL NOTE | |
| General note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science of the Asian Institute of Technology,Bangkok, Thailand. |
| 502 ## - DISSERTATION NOTE | |
| Dissertation note | Thesis (M.Sc.) - Asian Institute of Technology, 1974 |
| 520 ## - SUMMARY, ETC. | |
| Summary, etc. | A pilot scale oxidation ditch was built to evaluate whether the design parameters recommended by PASVEER (1969) could be improved under tropical conditions. While nutrient and D.O. were maintained at non-limiting levels, 8 different organic loadings of Pepsi-Cola waste, ranging from F/M = 0.07 to 0.78, were studied at a common detention time of 48 hours. Results showed that the effluent COD, increased with increasing loading. But the COD removal efficiency remained above 96% throughout the whole organic loading range. Ash content of the sludge was about 24% at loadings below F/M = 0.2, but decreased down to 13% at higher organic loadings. Keeping the organic loading with F/M about 0.38, the results. of 3 tests with different detention times showed that the change of hydraulic retention time from 48 hours to 17.5 hours did not change the COD removal rate, nor. the ash content of the sludge. However, at the same organic loading, a low influent COD lowered effluent COD and SVI . In a separate test, laboratory scale aeration units were set up to find out the chemicals which can restore the settling properties of a bulking sludge, once it occurs in an oxidation ditch, by changing its microbial composition. It was found that addition of calcium acetate at a concentration of 0.6 g per litre of bulked sludge, with NaN03 at a concentration of 0.5 g per litre of bulked sludge, suppressed the growth of Sphaerotilus, and selectively promoted to growth of other desirable bacteria so that the bulking problem was completely eliminated in a period of 8 days. |
| 650 #0 - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name entry element | Water |
| General subdivision | Pollution |
| 650 #0 - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name entry element | Oxidation |
| 700 1# - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Pescod, M.B., |
| Relator term | Chairpeson |
| 700 1# - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Yang, Yi Ping, |
| Relator term | Co-Chairperson |
| 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. 643 |
| 856 ## - ELECTRONIC LOCATION AND ACCESS | |
| Materials specified | Full-Text |
| Uniform Resource Identifier | <a href="http://203.159.5.9/ait-thesis/detail.php?q=B24197">http://203.159.5.9/ait-thesis/detail.php?q=B24197</a> |
| 907 ## - LOCAL DATA ELEMENT G, LDG (RLIN) | |
| a | .b10192657 |
| b | mnait |
| c | v |
| 902 ## - LOCAL DATA ELEMENT B, LDB (RLIN) | |
| a | 260525 |
| 998 ## - LOCAL CONTROL INFORMATION (RLIN) | |
| Operator's initials, OID (RLIN) | 3 |
| Cataloger's initials, CIN (RLIN) | 951012 |
| First date, FD (RLIN) | m |
| -- | a |
| -- | v |
| -- | 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 | 40-Archives |
| 909 ## - LOCAL ITEMS USED | |
| Barcode | Barcode : 30050003033015 |
| CREATED | CREATED : 1995-10-13 |
| RECORD Id | RECORD # : i10230920 |
| LPATRON | LPATRON : 0 |
| LCHKIN | LCHKIN : - |
| RENEWALS | # RENEWALS : 0 |
| -- | # OVERDUE : 0 |
| -- | IUSE3 : 0 |
| -- | TOT CHKOUT : 0 |
| -- | TOT RENEW : 0 |
| 909 ## - LOCAL ITEMS USED | |
| Barcode | Barcode : 30050003033049 |
| CREATED | CREATED : 1995-10-13 |
| RECORD Id | RECORD # : i10230932 |
| LPATRON | LPATRON : 0 |
| LCHKIN | LCHKIN : - |
| RENEWALS | # RENEWALS : 0 |
| -- | # OVERDUE : 0 |
| -- | IUSE3 : 0 |
| -- | TOT CHKOUT : 0 |
| -- | TOT RENEW : 0 |
| 909 ## - LOCAL ITEMS USED | |
| Barcode | Barcode : 30050160093356 |
| CREATED | CREATED : 2016-04-22 |
| RECORD Id | RECORD # : i12946941 |
| 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. 643 | 30050003033015 | 18/08/2026 | 2 | 18/08/2026 | 20-AIT Publication | ||||
| Available for Loans | Asian Institute of Technology Library | Asian Institute of Technology Library | AIT Publications | 18/08/2026 | AIT Thesis no. 643 | 30050003033049 | 18/08/2026 | 1 | 18/08/2026 | 20-AIT Publication | ||||
| Available for Loans | Asian Institute of Technology Library | Asian Institute of Technology Library | Archives | 18/08/2026 | AIT Thesis no. 643 | 30050160093356 | 18/08/2026 | 18/08/2026 | 40-Archives |