Document Detail


Long-term impacts on sewers following food waste disposer installation in housing areas.
MedLine Citation:
PMID:  25176297     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
To increase biogas generation and decrease vehicle transportation of solid waste, the integration of food waste disposers (FWDs) into the wastewater system has been proposed. However, concerns have been raised about the long-term impact of the additional load of the FWDs on sewer systems. To examine the said impact, this study has used closed-circuit television inspection techniques to evaluate the status of 181 concrete pipes serving single family housing areas with a diameter of 225 mm, ranging from a 100% connection rate of households with an FWD to none. A minor study was also performed on a multi-family housing area, where mainly plastic pipes (200 mm) were used. The extent and distribution of deposits related to the ratio of FWDs, inclination and pipe sagging (backfalls) were ascertained by using linear regression and analysis of variance. The results showed that FWDs have had an impact on the level of deposits in the sewer, but this has, in turn, been of minor significance. With a high connection rate of FWDs upstream of a pipe, the extent of the total level of deposits, as well as finer sediments, was statistically determined to be greater. However, the majority of the deposits were observed to be small, which would suggest the impact of FWDs on sewer performance to be minor. As food waste not compatible with the FWD was seen in the sewers, educational campaigns could be beneficial to further lower the risks of sewer blocking.
Authors:
Jonathan Mattsson; Annelie Hedström; Maria Viklander
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Publication Detail:
Type:  Journal Article     Date:  2014-05-22
Journal Detail:
Title:  Environmental technology     Volume:  35     ISSN:  0959-3330     ISO Abbreviation:  Environ Technol     Publication Date:  2014  
Date Detail:
Created Date:  2014-09-01     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9884939     Medline TA:  Environ Technol     Country:  England    
Other Details:
Languages:  eng     Pagination:  2643-51     Citation Subset:  IM    
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