Struvite Precipitation Has Increasing Interest as a Technology for Removing and Recovering Phosphorus from Wastewater Streams. Many Chemical Factors Have Been Studied, Such as Optimum PH Values and Component-Ion Molar Ratios, Yet, Understanding of Physical Aspects is Lacking. Two Physical Parameters Were Tested: (1) Seeding Material Addition and (2) Mixing. Objectives Were to Evaluate Three Seeding Materials and to Optimize Mixing Conditions for Struvite-Crystal Precipitation, Growth, and Subsequent Sedimentation. Results Confirm that Mixing Strength and Proper Seeding Materials Increase Crystal Size and Improve Settleability. for Unseeded Solutions, Optimum Phosphorus Removal Was Achieved at a Mixing Strength of G = 76 S-1. Struvite Crystals that Were Added as the Seeding Material Provided the Best Performance with Respect to Phosphorus Removal and Crystal-Size Distribution. overall, This Study Provided Information to Improve the Practical Application of Struvite Precipitation as a Phosphorous-Treatment Technology for Wastewaters, While Generating a Marketable Slow-Release Fertilizer as a Product.
J. Wang et al., "Effect of Seeding Materials and Mixing Strength on Struvite Precipitation," Water Environment Research, vol. 78, no. 2, pp. 125 - 132, Wiley, Jan 2006.
The definitive version is available at https://doi.org/10.2175/106143005X89580
Civil, Architectural and Environmental Engineering
Keywords and Phrases
Phosphorus removal; Seeding materials; Struvite precipitation; Swine waste
International Standard Serial Number (ISSN)
Article - Journal
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01 Jan 2006