Evaluation of nutrient recovery after anaerobic digestion of cattle dung in a family size biogas plant

A one year study of the nutrient status of cattle dung (influent) and digested cattle dung slurry (effluent) was made of a Khadi and Village Industries Commission (KVIC) model family size (4 m3) biogas plant to evaluate nutrient (nitrogen, phosphorus, potassium) recovery. Total Kjeldahl Nitrogen (TK...

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Published inBiomass & bioenergy Vol. 3; no. 5; pp. 377 - 380
Main Authors Balasubramanian, P.R., Kasturi Bai, R.
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 1992
Subjects
Anaerobic digestion
biogas
dung
nitrogen
nutrient recovery
phosphorus
potassium
potassium
dung
nitrogen
biogas
nutrient recovery
Anaerobic digestion
phosphorus
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Summary:A one year study of the nutrient status of cattle dung (influent) and digested cattle dung slurry (effluent) was made of a Khadi and Village Industries Commission (KVIC) model family size (4 m3) biogas plant to evaluate nutrient (nitrogen, phosphorus, potassium) recovery. Total Kjeldahl Nitrogen (TKN) and total Potassium (TK) were recovered completely after biogas production. Total Phosphorus (TPO 4 −) showed a 30% reduction and ammonia nitrogen (NH 3-N) showed a 70% increase compared to the influent. Regression analysis showed a significant correlation of Total Solids (TS) with Nitrogen ( r = 0.675), Phosphorus ( r = 0.855) and Potassium ( r = 0.740) after anaerobic digestion.
ISSN:0961-9534
1873-2909
DOI:10.1016/0961-9534(92)90012-F