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Title

Can aquatic worms enhance methane production from waste activated sludge?

AuthorsSerrano, Antonio; Hendrickx, Tim L.G.; Elissen, Hellen H.J.; Laarhoven, Bob; Buisman, Cees J.N.; Temmink, Hardy
KeywordsAquatic worms
Lumbriculus variegatus
Waste sludge
Anaerobic digestion
Issue Date2016
PublisherElsevier
CitationBioresource Technology 211: 51- 57 (2016)
AbstractAlthough literature suggests that aquatic worms can help to enhance the methane production from excess activated sludge, clear evidence for this is missing. Therefore, anaerobic digestion tests were performed at 20 and at 30 °C with sludge from a high-loaded membrane bioreactor, the aquatic worm Lumbriculus variegatus, feces from these worms and with mixtures of these substrates. A significant synergistic effect of the worms or their feces on methane production from the high-loaded sludge or on its digestion rate was not observed. However, a positive effect on low-loaded activated sludge, which generally has a lower anaerobic biodegradability, cannot be excluded. The results furthermore showed that the high-loaded sludge provides an excellent feed for L. variegatus, which is promising for concepts where worm biomass is considered a resource for technical grade products such as coatings and glues.
Description4 Figuras.-- 2 Tablas
Publisher version (URL)http://dx.doi.org/10.1016/j.biortech.2016.03.061
URIhttp://hdl.handle.net/10261/207748
Identifiersdoi: 10.1016/j.biortech.2016.03.061
issn: 1873-2976
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