Application of Process Intensification in the Treatment of Pit Latrine Sludge from Informal Settlements in Blantyre City, Malawi
Bibliographic Data
| ID | 15512900 |
|---|---|
| Authors | Khumbo Kalulu (0000-0001-9841-9173, University of Malawi, corresponding author), Bernard Thole (0000-0003-3800-1888, University of Malawi), Theresa Mkandawire (0009-0001-0639-7657, University of Malawi), Grant Kululanga (University of Malawi) |
| Year | 2020 |
| Volume | 17 |
| Issue | 9 |
| Pages | 3296-3296 |
| Publication date | 2020-05-09 |
| Open Access | Yes |
| Type | ARTICLE |
| Venue | International Journal of Environmental Research and Public Health (JOURNAL) |
| Journal identifiers | ISSN: 1661-7827 • E-ISSN: 1660-4601 |
| Publisher | Multidisciplinary Digital Publishing Institute (PUBLISHER • CH) |
| DOI | 10.3390/ijerph17093296 |
| PMID | 32397358 |
| OpenAlex | W3020925337 |
| Language | EN |
| References cited | 2 |
Many developing countries lack the infrastructure needed for the treatment of fecal sludge. One limitation in implementing available treatment options is the limited availability of land in the urban areas of these countries. This paper investigated the application of process intensification as a way of reducing the land area required to dewater and sanitize pit latrine sludge from informal settlements in Blantyre City, Malawi. The intensification of the sludge treatment process was achieved by enhancing dewatering through the application of additives and by combining the dewatering and sanitization stages. Nine combinations of sludge, lime and rice husk dosages, in addition to a control, were simultaneously loaded on unplanted drying bed units to dewater for 29 days. The study found a significant reduction of 21% to 73% in the land area required to dewater and sanitize pit latrine sludge. From the study, process intensification was shown to have the potential to significantly reduce the land area required to dewater and sanitize pit latrine sludge from informal settlements in Malawi cities. This makes it an option that can be implemented close to informal settlements, despite land limitation in these areas
Dewatering · Economic growth · Environmental protection · Geography · Human settlement · Informal settlements · Latrine · Lime · Pit latrine · Sanitation · Waste management · Engineering · Environmental Science · Wastewater Treatment and Reuse · Environmental Engineering · Geology
| Highly cited | No |
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