Solid\u2013liquid separation as a pre-treatment before
\nanaerobic digestion was tested in a pilot-scale digester,
\nin which part of the liquid manure was substituted with
\nthe solids from separation (high-solids digester) and
\ncompared with anaerobic digestion using liquid manure
\nalone (reference digester).
\nThe ratio of CH4 in the biogas averaged 71% in the
\nreference digester and 65% in the high-solids digester.
\nSubstitution of slurry with up to 60% solid manure
\nresulted in a higher gas production per digester volume at
\n52 \u00b0C than can be achieved by liquid manure alone, thus
\nthe CH4 yield in terms of digester volume was almost
\ntwice that in the reference digester during the period with
\n60% substitution.
\nHowever, this high ratio of solid matter also increased
\nthe NH4\u2013N level beyond the normal inhibitory level, to
\nmore than 5 g L− 1, giving rise to VFA levels higher than
\nnormally associated with a stable process, and to a reduced
\nyield in terms of VS; the yield in the high-solids digester in
\nterms ofVSwas on average slightly above 200 LCH4 kg− 1 VS, compared to the level of 320 L CH4 kg− 1 VS in the
\nreference digester, which indicated an inhibition of the
\nprocess in the high-solids digester. When the high-solids
\ndigester was coupled with an efficient post-digestion,
\nthe total yield in terms of VS was comparable for both
\ndigesters, indicating that the reduced yield caused by
\ninhibition can be compensated for by coupling an efficient
\npost-digestion to the nitrogen-inhibited process.<\/p>\n","protected":false},"excerpt":{"rendered":"
Solid\u2013liquid separation as a pre-treatment before anaerobic digestion was tested in a pilot-scale digester, in which part of the liquid manure was substituted with the solids from separation (high-solids digester) and compared with anaerobic digestion using liquid manure alone (reference digester). The ratio of CH4 in the biogas averaged 71% in the reference digester and […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[8882,659,439,13816,1277,6194,356,357,316,4135,20007,853,5381,308,169,187,63,16262,17743,27282,210,20911,1579,18011,52,2285],"class_list":["post-3638","post","type-post","status-publish","format-standard","hentry","category-energy","tag-al","tag-anaerobic","tag-anaerobic-digestion","tag-ass","tag-biogas","tag-biogas-manure-separation-anaerobic-digestion","tag-digester","tag-digestion","tag-gas","tag-gas-production","tag-gh","tag-inhibition","tag-light","tag-liquid-manure","tag-manure","tag-nitrogen","tag-performance","tag-pl","tag-prod","tag-production","tag-slurry","tag-t","tag-test","tag-tot","tag-treatment","tag-yield"],"_links":{"self":[{"href":"http:\/\/prairieswine.com\/rsc\/wp-json\/wp\/v2\/posts\/3638","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/prairieswine.com\/rsc\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/prairieswine.com\/rsc\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/prairieswine.com\/rsc\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/prairieswine.com\/rsc\/wp-json\/wp\/v2\/comments?post=3638"}],"version-history":[{"count":0,"href":"http:\/\/prairieswine.com\/rsc\/wp-json\/wp\/v2\/posts\/3638\/revisions"}],"wp:attachment":[{"href":"http:\/\/prairieswine.com\/rsc\/wp-json\/wp\/v2\/media?parent=3638"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/prairieswine.com\/rsc\/wp-json\/wp\/v2\/categories?post=3638"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/prairieswine.com\/rsc\/wp-json\/wp\/v2\/tags?post=3638"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}