AI SearchKinetics of organic matter and fecal micro-organism removal in free water surface constructed wetlands (Record no. 67232)
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| 000 -LEADER | |
|---|---|
| fixed length control field | 04992cas|a2200433 a 4500 |
| 005 - DATE AND TIME OF LATEST TRANSACTION | |
| control field | 20260818144930.0 |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION | |
| fixed length control field | 091008s1999 th uu|m rtt 0| a1eng d |
| 035 ## - SYSTEM CONTROL NUMBER | |
| System control number | .b1175400x |
| 099 #9 - LOCAL FREE-TEXT CALL NUMBER (OCLC) | |
| Classification number | AIT Diss. no. EV-99-2 |
| 100 1# - MAIN ENTRY--PERSONAL NAME | |
| Personal name | Khatiwada, Nawa Raj |
| 245 10 - TITLE STATEMENT | |
| Title | Kinetics of organic matter and fecal micro-organism removal in free water surface constructed wetlands |
| 260 ## - PUBLICATION, DISTRIBUTION, ETC. | |
| Place of publication, distribution, etc. | Bangkok : |
| Name of publisher, distributor, etc. | Asian Institute of Technology, |
| Date of publication, distribution, etc. | 1999 |
| 300 ## - PHYSICAL DESCRIPTION | |
| Extent | 116 leaves |
| 490 1# - SERIES STATEMENT | |
| Series statement | Dissertation ; |
| Volume/sequential designation | no. EV-99-2 |
| 500 ## - GENERAL NOTE | |
| General note | A dissertation submitted in partial fulfillment of the requirements for the degree of Doctor of Engineering, School of Environment, Resources and Development |
| 502 ## - DISSERTATION NOTE | |
| Dissertation note | Thesis (Ph.D.) - Asian Institute of Technology, 1999 |
| 520 ## - SUMMARY, ETC. | |
| Summary, etc. | Constructed wetlands are attractive alternatives to solve water pollution problems as they fulfil the requirements of both treatment and waste recycling. This study was undertaken to investigate the organic matter and fecal microorganisms removal kinetics in free-water-surface (FWS) constructed wetlands treating domestic wastewater. The basic kinetic principles were applied to establish the engineering design criteria for the FWS constructed wetlands systems located in the tropical region. The kinetic model of organic matter removal was based on the activity of biofilm bacteria attached to the bed media. Based on the chemical oxygen demand (COD) removal performance and intrinsic biofilm characteristics, the value of effective specific surface area exploited by the biofilm in degrading the influent organic matter was estimated from the biofilm models considering both slab and cylindrical geometries of the media. With the biofilm kinetic model, a typical value of first-order COD removal rate coefficient was estimated as 0.42 day-{u2022} or 44 m/yr. The removal kinetics of fecal coliform and bacteriophage was described by the first-order rate equations incorporating the effects of temperature, light and the media filtration. The removal rate coefficient due to media attachment was assessed by a single-collector model previously used for the modelling of colloidal particle transp01t in porous media. The typical first-order fecal coliform and bacteriophage removal rate coefficients were estimated as 1.61 day·{u2022} or 168 m/yr and 0.91 day-{u2022} or 95 m/yr, respectively. The effluent concentrations of organic matter and fecal microorganisms in the pilot scale constructed wetland units, predicted from both dispersed flow and plug flow equations using model calculated removal rate coefficients, were found comparable with the observed values, suggesting the applicability of both equations in either estimating the hydraulic retention times needed for a desired removal efficiency or predicting the effluent concentrations of FWS constructed wetland systems in operation. The uncertainty of the design equations due to stochastic variability of the input parameters was assessed by the Monte Carlo simulation technique. The probability distributions of the effluent concentrations of organic matter and fecal microorganisms were determined from the repeated deterministic calculations with the random input variables drawn from the probability density functions. The distribution suggested that single point estimates of effluent concentrations based on the mean influent values were merely representing fifty percentiles indicating a larger uncertainty in the long-term prediction. The impact of variability can be minimised by either keeping a nominal safety factor or by designing the units with higher percentiles of input variables. |
| 650 #0 - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name entry element | Constructed wetlands |
| 650 #0 - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name entry element | Sewage |
| General subdivision | Purification |
| -- | Organic compounds removal |
| 700 0# - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Chongrak Polprasert, |
| Relator term | Chairperson |
| 700 1# - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Annachhatre, Ajit P., |
| Relator term | Examination Committee |
| 700 1# - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Takizawa, Satoshi, |
| Relator term | Examination committee |
| 700 1# - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Lin, C. K., |
| Relator term | Examination committee |
| 700 1# - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Haberl, lng. Raimund, |
| Relator term | Examination committee |
| 810 2# - SERIES ADDED ENTRY--CORPORATE NAME | |
| Corporate name or jurisdiction name as entry element | Asian Institute of Technology. |
| Title of a work | Dissertation ; |
| Volume/sequential designation | no. EV-99-2 |
| 856 ## - ELECTRONIC LOCATION AND ACCESS | |
| Materials specified | Full-Text |
| Uniform Resource Identifier | <a href="http://203.159.5.9/ait-thesis/detail.php?q=B11912">http://203.159.5.9/ait-thesis/detail.php?q=B11912</a> |
| 907 ## - LOCAL DATA ELEMENT G, LDG (RLIN) | |
| a | .b1175400x |
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| 902 ## - LOCAL DATA ELEMENT B, LDB (RLIN) | |
| a | 240411 |
| 998 ## - LOCAL CONTROL INFORMATION (RLIN) | |
| Operator's initials, OID (RLIN) | 0 |
| Cataloger's initials, CIN (RLIN) | 990702 |
| First date, FD (RLIN) | m |
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| -- | y |
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| 945 ## - LOCAL PROCESSING INFORMATION (OCLC) | |
| l | mnait |
| 945 ## - LOCAL PROCESSING INFORMATION (OCLC) | |
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| 945 ## - LOCAL PROCESSING INFORMATION (OCLC) | |
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| 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 : 30050120556971 |
| CREATED | CREATED : 1999-02-07 |
| RECORD Id | RECORD # : i12140491 |
| LPATRON | LPATRON : 1014239 |
| LCHKIN | LCHKIN : 2009-05-25 |
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| 909 ## - LOCAL ITEMS USED | |
| Barcode | Barcode : 30050120556955 |
| CREATED | CREATED : 1999-02-07 |
| RECORD Id | RECORD # : i12140508 |
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| 909 ## - LOCAL ITEMS USED | |
| Barcode | Barcode : 30050160004825 |
| CREATED | CREATED : 2016-01-02 |
| RECORD Id | RECORD # : i12876264 |
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| 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 Diss. no. EV-99-2 | 30050120556971 | 18/08/2026 | 1 | 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 Diss. no. EV-99-2 | 30050120556955 | 18/08/2026 | 2 | 18/08/2026 | 20-AIT Publication | ||||
| Available for Loans | Asian Institute of Technology Library | Asian Institute of Technology Library | Archives | 18/08/2026 | AIT Diss. no. EV-99-2 | 30050160004825 | 18/08/2026 | 18/08/2026 | 40-Archives |