AI SearchApplication of constant recycle solid concentration in the pure oxygen activated sludge system (Record no. 6526)
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| 000 -LEADER | |
|---|---|
| fixed length control field | 05282nam a2200469 4500 |
| 005 - DATE AND TIME OF LATEST TRANSACTION | |
| control field | 20260817162844.0 |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION | |
| fixed length control field | 140198 th eng |
| 035 ## - SYSTEM CONTROL NUMBER | |
| System control number | .b10087552 |
| 099 #9 - LOCAL FREE-TEXT CALL NUMBER (OCLC) | |
| Classification number | AIT Thesis no. 888 |
| 100 1# - MAIN ENTRY--PERSONAL NAME | |
| Personal name | Lin, Li-jen |
| 245 10 - TITLE STATEMENT | |
| Title | Application of constant recycle solid concentration in the pure oxygen activated sludge system |
| 260 ## - PUBLICATION, DISTRIBUTION, ETC. | |
| Place of publication, distribution, etc. | Bangkok : |
| Name of publisher, distributor, etc. | Asian Institute of Technology, |
| Date of publication, distribution, etc. | 1976 |
| 300 ## - PHYSICAL DESCRIPTION | |
| Extent | 86 p. |
| 490 1# - SERIES STATEMENT | |
| Series statement | Thesis ; |
| Volume/sequential designation | no. 888 |
| 500 ## - GENERAL NOTE | |
| General note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering of the Asian Institute of Technology, Bangkok, Thailand. |
| 502 ## - DISSERTATION NOTE | |
| Dissertation note | Thesis (M.Eng.) - Asian Institute of Technology, 1976 |
| 520 ## - SUMMARY, ETC. | |
| Summary, etc. | Due to the increasing application of pure oxygen activated sludge process in practical usage, the understanding of kinetic and performance of the pure oxygen system is necessary. HSU (1975) conducted the studies of kinetic of microbial growth in the pure oxygen system for batch and once-through system. The main purpose of this research is to investigate the kinetic and performance of a continuous flow pure oxygen process with cell recycle. The model for completely-mixed activated sludge with constant recycle cell concentration was used to investigate the performance of continuous flow oxygenation process. An actual soft drink industrial waste, i.e., Pepsi-Cola combined wastewater, was used as the substrate. Short-term experiments were conducted at various dilution rates for two recycle cell concentration values, i.e., 5000 g/l and 10,000 mg/l. The influent substrate concentration was maintained at 1000 mg/l COD, and the hydraulic recycle ratio, a, at 0.3. A laboratory fermenter was used as aerator. The aerator biological solids and effluent filtrate COD were observed and remained in the steady state. Very high COD removal efficiency was obtained even at very high dilution rate (low detention time), e.g. 92.3% at D(dilution rate) = 2 hr-1 for XR = 10,000 mg/l and 84.9% at D = 1 hr-1 for XR = 5,000 mg/l. No obvious dilute-out point was observed. Neither bulking nor rising sludge occurred during the period of experiment. The SVI values of the mixed liquor was very low within the range of 31.9 to 58.5. The carbohydrate and protein content of the cells has a slightly increasing trend as dilution rate increases, and they are independent of XR. The carbohydrate content was at the average value of 44.8% within the range of 10.1% to 21.6%, and the protein content was at the average value of 45% within the range of 35.6% to 52.2% for dilution rate vary from 1/9 hr-1 to 1/0.5 hr-1 and XR vary from 5000 mg/l to 10,000 mg/l. Cell yield was not related to the dilution rate and sludge loading. The average observed sludge yield was 0.55 (D varied from 1/9 to 1/0.5 hr-1 ', .XR was in the range of 5000 to 10,000 mg/l). Comparing with air activated sludge processes, CMOAS system (pure oxygen system). can provide better performance higher treatment efficiency, better settling characteristics of sludge and no bulking and rising sludge. No significant differences were observed in carbohydrate and protein content of the cells for oxygenation system and air system. The values of æm and ks are related to dilution rates. The higher dilution rate is, the higher values of æm and ks are. Two sets of æm and ks are found for the present CMOAS process, one is æm = 0.4 hr-1 and ks = 92 mg/l for dilution rate higher than 1/3 hr-1 , the other is æm = 0.05 hr-1 and k = 11.1 mg/l for dilution rate below 1/6 hr-1. The maintenance coefficient, kd, appears to have no effect on predicted values of effluent COD, but it influences the biological solids at low dilution rates (below 1/3 hr-1 ). |
| 650 #0 - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name entry element | Sewage disposal |
| 650 #0 - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name entry element | Sewage |
| General subdivision | Purification |
| -- | Activated sludge process |
| 700 1# - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Yang, Ping Yi, |
| Relator term | Chairperson |
| 700 1# - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Pescod, M.B., |
| Relator term | Examination Committee |
| 700 1# - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Nguyen Cong Thanh, |
| Relator term | Examination Committee |
| 700 1# - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Htun, Maung Nay, |
| Relator term | Examination Committee |
| 700 1# - 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 | The Government of Republic of China |
| 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. 888 |
| 856 ## - ELECTRONIC LOCATION AND ACCESS | |
| Materials specified | Full-Text |
| Uniform Resource Identifier | <a href="http://203.159.5.9/ait-thesis/detail.php?q=B23702">http://203.159.5.9/ait-thesis/detail.php?q=B23702</a> |
| 907 ## - LOCAL DATA ELEMENT G, LDG (RLIN) | |
| a | .b10087552 |
| b | mnait |
| c | x |
| 902 ## - LOCAL DATA ELEMENT B, LDB (RLIN) | |
| a | 260312 |
| 998 ## - LOCAL CONTROL INFORMATION (RLIN) | |
| Operator's initials, OID (RLIN) | 1 |
| 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 |
| 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 : 30050003037693 |
| CREATED | CREATED : 1995-10-13 |
| RECORD Id | RECORD # : i1009295x |
| LPATRON | LPATRON : 0 |
| LCHKIN | LCHKIN : - |
| RENEWALS | # RENEWALS : 0 |
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| 909 ## - LOCAL ITEMS USED | |
| Barcode | Barcode : 30050003037727 |
| CREATED | CREATED : 1996-06-06 |
| RECORD Id | RECORD # : i1177583x |
| LPATRON | LPATRON : 0 |
| LCHKIN | LCHKIN : - |
| RENEWALS | # RENEWALS : 0 |
| -- | # OVERDUE : 0 |
| -- | IUSE3 : 0 |
| -- | TOT CHKOUT : 0 |
| -- | TOT RENEW : 0 |
| 909 ## - LOCAL ITEMS USED | |
| Barcode | Barcode : 30050160091327 |
| CREATED | CREATED : 2016-04-27 |
| RECORD Id | RECORD # : i12959200 |
| LPATRON | LPATRON : 0 |
| LCHKIN | LCHKIN : - |
| RENEWALS | # RENEWALS : 0 |
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| -- | IUSE3 : 0 |
| -- | TOT CHKOUT : 0 |
| -- | TOT RENEW : 0 |
| 909 ## - LOCAL ITEMS USED | |
| Barcode | Barcode : 30050121035694 |
| CREATED | CREATED : 2022-11-24 |
| RECORD Id | RECORD # : i13416261 |
| 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. 888 | 30050003037693 | 17/08/2026 | 2 | 17/08/2026 | 20-AIT Publication | ||||
| Available for Loans | Asian Institute of Technology Library | Asian Institute of Technology Library | AIT Publications | 17/08/2026 | AIT Thesis no. 888 | 30050003037727 | 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. 888 | 30050160091327 | 17/08/2026 | 17/08/2026 | 40-Archives | ||||||
| Available for Loans | Asian Institute of Technology Library | Asian Institute of Technology Library | Archives | 17/08/2026 | AIT Thesis no. 888 | 30050121035694 | 17/08/2026 | 3 | 17/08/2026 | 20-AIT Publication |