@article {Collings:2019:1088-1697:395,
title = "Preliminary Study on the Potential Use of Fly Ash as a Ventilated Improved Pit Latrine Additive",
journal = "The Journal of Solid Waste Technology and Management",
parent_itemid = "infobike://jswt/jswt",
publishercode ="jswt",
year = "2019",
volume = "45",
number = "4",
publication date ="2019-11-01T00:00:00",
pages = "395-402",
itemtype = "ARTICLE",
issn = "1088-1697",
url = "https://www.ingentaconnect.com/content/jswt/jswt/2019/00000045/00000004/art00001",
doi = "doi:10.5276/JSWTM/2019.395",
keyword = "IMPROVED SANITATION, COMMUNITY OF PRACTICE, LEACHABLE CHEMICAL COMPONENTS, FAECAL COLIFORMS",
author = "Collings, Dylan and Tandlich, Roman and Dube, Cyril S. and Madikizela, Phindile and Ngqwala, Nosiphiwe P. and Ahmed, Mushtaque",
abstract = "This study describes the results of a series of laboratory experiments on aimed at developing of a protocol for the use of fly ash as a pit additive in the ventilated improved pit latrines (VIPs) in South Africa. Model VIP vaults were prepared in the laboratory and filled with synthetic
faecal sludge; and dosed with fly ash in amounts ranging from 5 to 20 % (w/w). The maximum leachable chemical oxygen demand (COD) accounted for 3.2 % of the total organic matter, while the maximum leachable ammonium accounted for 1.4 % of the leachable ammonium present in the synthetic faecal
sludge. All phosphate in the synthetic faecal material was leachable. Mixing of the 20 % dose of fly ash into the synthetic faecal sludge resulted a minimum 98.9 % reduction (or about two log units) in the faecal coliform concentration after 28 days of incubation. As a result, addition of
fly ash can decrease microbial threats to public and environmental health threats from the VIP faecal wastes, but can cause environmental contamination with phosphate. The fly ash dose and the duration of the faecal sludge treatment require further optimisation. Relationship between the chemical
composition of the fly ash used as an additive to stabilise the VIP faecal sludge and the leaching of phosphorus from the sludge will also have to be investigated further.",
}