Recovery of Ammonia and Production of High-Grade Phosphates from Digester Effluents

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Conservation and recovery of nitrogen and phosphorus from animal wastes and municipal effluents are important because of economic and environmental reasons. This paper presents a novel technology for separation and recovery of ammonia and phosphorus from liquid swine manure, which has significant amount of nutrients but also contains relatively high moisture content.…

Extraction and Recovery of Phosphorus from Pig Manure Using the Quick Wash Process

*Why Look at Phosphorus Recovery from Pig Manure?

Land disposal of manure is a challenging environmental problem in areas with intense confined pig production. When manure is land applied at optimal nitrogen rates for crop growth, phosphorus can accumulate in excess of soil assimilative capacity because of the disproportion of nitrogen and phosphorus contents in animal manures relative to plant biomass.…