Evaluation of Lactic Acid Produced by Fermentation of Selected Vegetable Waste as a Treatment in Faecal Sludge/ (Record no. 93736)
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| 000 -LEADER | |
|---|---|
| fixed length control field | 03012nam a22001817a 4500 |
| 003 - CONTROL NUMBER IDENTIFIER | |
| control field | KE-MeUCS |
| 005 - DATE AND TIME OF LATEST TRANSACTION | |
| control field | 20260327131321.0 |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION | |
| fixed length control field | 260327b |||||||| |||| 00| 0 eng d |
| 040 ## - CATALOGING SOURCE | |
| Transcribing agency | KE-MeUCS |
| 050 ## - LIBRARY OF CONGRESS CALL NUMBER | |
| Classification number | RA567.5.M8 2025 |
| 100 ## - MAIN ENTRY--PERSONAL NAME | |
| Personal name | Mwebia, Tyson Mwimathiri |
| 245 ## - TITLE STATEMENT | |
| Title | Evaluation of Lactic Acid Produced by Fermentation of Selected Vegetable Waste as a Treatment in Faecal Sludge/ |
| Remainder of title | Mwebia Tyson Mwimathiri |
| 260 ## - PUBLICATION, DISTRIBUTION, ETC. (IMPRINT) | |
| Place of publication, distribution, etc | Meru: |
| Name of publisher, distributor, etc | Meru University of Science and Technology, |
| Date of publication, distribution, etc | 2025. |
| 300 ## - PHYSICAL DESCRIPTION | |
| Extent | xii, 103p. |
| 500 ## - GENERAL NOTE | |
| General note | Includes Appendices and References |
| 520 ## - SUMMARY, ETC. | |
| Summary, etc | ABSTRACT<br/>Effective faecal sludge treatment is essential for pathogen reduction and compliance to<br/>World Health Organization standards for disposal or reuse. In developing countries, these<br/>treatments are frequently absent, ineffective, or immensely expensive. This study used an<br/>experimental research design to investigate the efficacy of lactic acid derived from selected<br/>vegetable wastes for the treatment of FS collected from an on-site sanitation system. Equal<br/>quantities of fresh cabbage, tomato, and carrot wastes were collected, pre-treated, and<br/>subjected to lacto-fermentation at 37 ℃ for six days. Daily monitoring of pH and lactic acid<br/>concentrations was performed using an electrode pH meter and a UV-Vis spectrophotometer,<br/>respectively. Gas chromatography-mass spectrometry (GC-MS) was used to identify lactic<br/>acid in the fermented vegetable wastes through a derivatization reaction. FS treatment was<br/>performed in four reactors with varying lactic acid ratios (1:1, 1:0.5, 1:0.35), and a control,<br/>with Escherichia coli (E. coli) as the pathogen indicator for faecal contamination. E. coli,<br/>total solids, volatile solids, and odour levels were monitored over a 16-day treatment period<br/>in the four reactors. The fermentation process was deemed successful as indicated by the<br/>decrease in pH levels. Successful GC-MS detection of butyl lactate, the derivatized form of<br/>lactic acid was observed in the fermented vegetable wastes. Lactic acid concentrations post<br/>fermentation were 1.39 ± 0.09 mg/mL, 1.17 ± 0.13 mg/mL, and 1.61 ± 0.34 mg/mL for<br/>cabbage, tomato, and carrot wastes respectively. Statistical analysis revealed no significant<br/>differences (p > 0.05) in lactic acid concentrations among the vegetable wastes on day six of<br/>fermentation. Consequently, cabbage waste-derived lactic acid was selected for subsequent<br/>experiments in addition to the local abundance of cabbage waste. Total solids and volatile<br/>solids decreased across all the reactors over time. From day four, E. coli was undetectable in<br/>reactor 1:1; which also showed the highest reduction in odour levels. Therefore, reactor 1:1<br/>treatment produced the optimal E. coli elimination and odour reduction conditions. This<br/>study demonstrates the potential of cabbage waste derived lactic acid for effective FS<br/>treatment |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) | |
| Source of classification or shelving scheme | Library of Congress Classification |
| Koha item type | Thesis |
| Cataloguer | Mercy Musungu |
| Withdrawn status | Lost status | Source of classification or shelving scheme | Damaged status | Not for loan | Home library | Current library | Shelving location | Date acquired | Source of acquisition | Cost, normal purchase price | Cataloguer | Total Checkouts | Full call number | Barcode | Date last seen | Price effective from | Koha item type |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Library of Congress Classification | Meru University | Meru University | Periodical Section | 26/03/2026 | Donation | 0.00 | Mercy Musungu | RA567.5.M8 2025 | 26-39344 | 27/03/2026 | 27/03/2026 | Thesis |