The effect of pH on the separation of manure nutrients with reverse osmosis membranes |
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| Authors: | L. Masse,D.I. Massé ,Y. Pellerin |
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| Affiliation: | 1. Agriculture and Agri-Food Canada, P.O. Box 90, Sherbrooke, Québec, Canada J1M 1Z3;2. Technologies Osmosys, 1722 Principale, St-Adrien de Ham, Québec, Canada J0A 1C0 |
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| Abstract: | This paper reports on the effect of pH on the retention of dry matter (DM), total ammonia-nitrogen (TAN), potassium, phosphorus and volatile fatty acids (VFAs) during the filtration of pretreated swine manure by three highly selective reverse osmosis (RO) membranes. The manure was pretreated using various combinations of biological and physical technologies, namely anaerobic digestion (AD), vacuum filtration through diatomaceous earth (DE), nanofiltration (NF), and a first stage RO filtration. The objective was to establish the level of acidification required to optimize permeate quality while minimizing chemical addition. |
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| Keywords: | Manure Ammonia-nitrogen Potassium Volatile fatty acids Membrane filtration |
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