On-farm treatment of swine manure based on solid–liquid separation and biological nitrification–denitrification of the liquid fraction

In some regions, intensive pig farming has led to soil and water pollution due to the over-application of manure as an organic fertilizer, thereby necessitating alternative treatment technologies to help manage the large amounts of manure generated. The present study seeks to determine the effective...

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Bibliographic Details
Published in:Journal of environmental management 2014-01, Vol.132, p.87-93
Main Authors: RIANO, B, GARCIA-GONZALEZ, M. C
Format: Article
Language:English
Subjects:
Agronomy. Soil science and plant productions
Animal, plant and microbial ecology
Animals
Applied ecology
Biological and medical sciences
Coagulation–flocculation
Conservation, protection and management of environment and wildlife
Denitrification
Farm management
Flocculation
Fundamental and applied biological sciences. Psychology
General agroecology
General agroecology. Agricultural and farming systems. Agricultural development. Rural area planning. Landscaping
General agronomy. Plant production
General aspects
Generalities. Agricultural and farming systems. Agricultural development
Hogs
Manure - analysis
Manure - microbiology
Manures
Nitrification
Nitrification–denitrification
Organic waste treatment
Pathogens
Refuse Disposal - methods
Running cost
Screw pressing
Seasons
Spain
Sus scrofa
Swine manure
Waste Disposal, Fluid - methods
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Summary:In some regions, intensive pig farming has led to soil and water pollution due to the over-application of manure as an organic fertilizer, thereby necessitating alternative treatment technologies to help manage the large amounts of manure generated. The present study seeks to determine the effectiveness of an on-farm swine manure treatment plant consisting of a solid–liquid separation phase using screw pressing followed by a coagulation–flocculation process, and nitrification–denitrification of the liquid fraction. Each treatment unit was evaluated for its contribution towards reducing the raw manure concentration of solids, organic matter, nutrients (nitrogen and phosphorous), metals, and pathogens. The overall system presented high removal efficiencies of up to 71% of TS (total solids) and 97% of TCOD (total chemical oxygen demand). Approximately 97% TKN (total Kjeldahl nitrogen) and 89% TP (total phosphorous) removal was achieved. Metals (copper and zinc) diminished in the liquid fraction to non-detectable concentrations (
ISSN:0301-4797
1095-8630
DOI:10.1016/j.jenvman.2013.10.014