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Trash removal methods for improved mechanical emptying of pit latrines using a screw auger

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dc.contributor.author Sisco, Tracey
dc.contributor.author Rogers, Tate
dc.contributor.author Beckwith, Walt
dc.contributor.author Chipeta, Willy
dc.contributor.author Holm, Rochelle
dc.contributor.author Buckley, Christopher A.
dc.contributor.author de los Reyes III, Francis L.
dc.date.accessioned 2020-08-11T13:37:24Z
dc.date.available 2020-08-11T13:37:24Z
dc.date.issued 2017
dc.identifier.citation Sisco, T., Rodgers, T., Beckwith, W., Chipeta, w., Holm, R., Buckley, C. A. and De los Reyes III, F. L. trash removal methods for improved mechanical emptying of pit latrines using a screw auger. journal of water, sanitation and hygiene for development, 2017, 7 (1), pages 85-91. DOI: 10.2166/washdev.2017.106 https://washdev.iwapoline.com/content/7/1/85 en_US
dc.identifier.uri 192.168.1.8:8080/xmlui/handle/123456789/105
dc.identifier.uri https://iwaponline.com/washdev/article-pdf/7/1/85/386171/washdev0070085.pdf
dc.description.abstract Trash in pit latrines is one of the largest challenges facing pit emptying technologies, including the powered auger (the Excrevator), developed for improved emptying in lower- and lower-middle income countries. This study focused on two trash removal methods in conjunction with pit emptying by the Excrevator: (1) simultaneous removal of trash with sludge and (2) manual trash removal prior to sludge removal. Simultaneous removal was tested by adding to the inlet of the Excrevator system two cutting heads designed to reduce the size of trash particles before entering the pipe and auger. Laboratory testing indicated that the auger will not provide the rotational speeds necessary for proper maceration of fibrous materials such as clothing, indicating that a separate maceration unit with higher rotational methods may be more appropriate. Four manual trash removal mechanisms were designed to improve on existing manual trash ‘fishing’ tools such as iron rods with fixed hooks. Two of these tools (the ‘claw’ and the ‘hook’) showed promising laboratory results and were subsequently field tested in Mzuzu, Malawi. Both tools proved more efficient than the current tools used in the field and have potential for use in Malawi. en_US
dc.language.iso en en_US
dc.subject auger, en_US
dc.subject developing countries, en_US
dc.subject Excrevator, en_US
dc.subject pit emptying, en_US
dc.subject trash removal en_US
dc.title Trash removal methods for improved mechanical emptying of pit latrines using a screw auger en_US
dc.type Article en_US


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