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Nutrient Recovery from Piggy Wastewater by Enhancing Struvite Crystallization Process

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Abstract:

The problem of nutrient pollution from piggy wastewater has been considered as a serious problem. Enhancing struvite crystallization process is an efficient technology for ammonium recovery. In our study, the optimal reaction conditions of pH, Mg2+: NH4+: PO43- molar ratio, mixing reaction time, and different kinds of chemicals combinations for ammonium recovery were examined. The conclusions were drawn as following. The optimal pH for ammonium recovery was 9.0. The optimal Mg2+: NH4+: PO43- molar ratio for ammonium recovery was 1.3:1:1. The optimal mixing reaction time for ammonium recovery was 10 min. The chemicals combination of MgCl2 + Na2HPO4 was the most efficient for ammonium recovery. Scanning electron microscopy analysis indicated the unshaped struvite crystal was coarse and its size was irregular.

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Periodical:

Applied Mechanics and Materials (Volumes 522-524)

Pages:

579-583

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.522-524.579

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Online since:

February 2014

Authors:

Tao Zhang, Ci Fang, Ping Li, Rong Feng Jiang*

Keywords:

Enhancing, Nutrient, Piggy Wastewater, Struvite Crystallization

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© 2014 Trans Tech Publications Ltd. All Rights Reserved

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