<abstract xmlns="http://www.w3.org/1999/xhtml"> The problem of phosphorus discharge is related to environmental protection and food security. Struvite crystallization is a useful technology for phosphate recovery from wastewater. In the research, struvite crystallization process with CO2 degasification continuous U-shape reactor (CUSR) was application for phosphate recovery from animal manure wastewater. The result indicated PO43--P recovery ratio could achieve 47-53% without magnesium addition when CUSR hydraulic retention time controlled at 60 min. With extra magnesium addition, PO43--P recovery ratio could significant achieve 80-86% at magnesium addition amount 57.5 mg/dm3. PHREEQC modeling predictions trend of struvite crystallization was close to CUSR experimental results. The modeling calculation can provide a theoretical guide for operational parameters design. For seeding technology, high phosphate recovery efficiency was obtained and preformed struvite was the most effective seeding material. Surface characterization analysis demonstrated the dominant composition of chemical solids was struvite. Water extraction analysis indicated chemical solids recovery from animal manure wastewater could release PO43--P slowly and be available as slow-release fertilizer.</abstract>

The problem of phosphorus discharge is related to environmental protection and food security. Struvite crystallization is a useful technology for phosphate recovery from wastewater. In the research, struvite crystallization process with CO2 degasification continuous U-shape reactor (CUSR) was application for phosphate recovery from animal manure wastewater. The result indicated PO43--P recovery ratio could achieve 47-53% without magnesium addition when CUSR hydraulic retention time controlled at 60 min. With extra magnesium addition, PO43--P recovery ratio could significant achieve 80-86% at magnesium addition amount 57.5 mg/dm3. PHREEQC modeling predictions trend of struvite crystallization was close to CUSR experimental results. The modeling calculation can provide a theoretical guide for operational parameters design. For seeding technology, high phosphate recovery efficiency was obtained and preformed struvite was the most effective seeding material. Surface characterization analysis demonstrated the dominant composition of chemical solids was struvite. Water extraction analysis indicated chemical solids recovery from animal manure wastewater could release PO43--P slowly and be available as slow-release fertilizer.

Phosphate recovery from animal manure wastewater by struvite crystallization and CO2 degasification reactor

Key Laboratory of Plant-Soil Interactions of Ministry of Education, College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China, phone +86 10 6273 1179

Ecological Chemistry and Engineering S

This article is distributed under the terms of the Creative Commons Attribution Non-Commercial License, which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Phosphate recovery from animal manure wastewater by struvite crystallization and CO degasification reactor

The problem of phosphorus discharge is related to environmental protection and food security. Struvite crystallization is a useful technology for phosphate...

Phosphate recovery from animal manure wastewater by struvite crystallization and CO₂ degasification reactor

Published Online: Apr 09, 2014

Page range: 89 - 99

DOI: https://doi.org/10.2478/eces-2014-0008

Keywords
animal manure wastewater, CO2 degasification, continuous U-shape reactor (CUSR), phosphate, struvite crystallization

© by Rongfeng Jiang

This article is distributed under the terms of the Creative Commons Attribution Non-Commercial License, which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Phosphate recovery from animal manure wastewater by struvite crystallization and CO2 degasification reactor

Published Online: Apr 09, 2014

Page range: 89 - 99

DOI: https://doi.org/10.2478/eces-2014-0008

Keywordsanimal manure wastewater, CO2 degasification, continuous U-shape reactor (CUSR), phosphate, struvite crystallization

© by Rongfeng Jiang

This article is distributed under the terms of the Creative Commons Attribution Non-Commercial License, which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Phosphate recovery from animal manure wastewater by struvite crystallization and CO₂ degasification reactor

Keywords
animal manure wastewater, CO2 degasification, continuous U-shape reactor (CUSR), phosphate, struvite crystallization