Use of Calcined Dolomite as Chemical Precipitant in the Simultaneous Removal of Ammonium and Phosphate from Synthetic Wastewater and from Agricultural Sludge
Pesonen, J., Myllymäki, P., Tuomikoski, S., Vervecken, G., Hu, T., Prokkola, H., Tynjälä, P., & Lassi, U. (2019). Use of Calcined Dolomite as Chemical Precipitant in the Simultaneous Removal of Ammonium and Phosphate from Synthetic Wastewater and from Agricultural Sludge. ChemEngineering, 3(2), Article 40. https://doi.org/10.3390/chemengineering3020040
Hu, Tao |
© 2019 by The Authors
Phosphorus as phosphate and nitrogen as ammonium or nitrate are the main nutrients in wastewaters and agricultural sludges. They runoff easily to waterways and cause eutrophication in water bodies. However, ammonium and phosphate could be precipitated simultaneously and used as recycled nutrients. In this research, dolomite calcined at 650 °C, 750 °C, or 950 °C and commercial MgO were used as precipitants in simultaneous phosphate and ammonium removal from synthetic (NH4)2HPO4 solution and agricultural sludge. Calcination at 750 °C was the preferred option as dolomite was decomposed to MgO and CaCO3 for optimal struvite precipitation. Molar ratios of 1.1–1.6:1–2:2 (Mg:P:N) were employed in the experiments. Very robust ammonium removal was obtained with MgO (57%), dolomite 650 °C and dolomite 750 °C (75%). MgO removed almost all phosphate, while dolomite 650 °C removed 65%, and dolomite 750 °C removed 60% (70% from agricultural sludge). Some part of the phosphate was adsorbed, most likely by CaCO3, during dolomite precipitation. Struvite was the only identified reaction product in all samples after 24 h of precipitation. Calcined dolomite had great potential in ammonium and phosphate precipitation from both synthetic waters and agricultural sludges and the precipitates could be used as recycled fertilizers. ...
Publication in research information system
MetadataShow full item record
Showing items with similar title or keywords.
The use of calcined paper mill sludge as a chemical precipitant in the simultaneous removal of ammonium and phosphate : paper mill waste recycling and reuse Myllymäki, Pekka; Pesonen, Janne; Romar, Henrik; Hu, Tao; Tynjälä, Pekka; Lassi, Ulla (Desalination Publications, 2020)Currently, recycling and re-use of materials is extremely important due to the diminishing of natural resources. The objective of the European Union’s circular economy strategy is to increase recycling and ...
The Use of Industrial Waste Materials for the Simultaneous Removal of Ammonium Nitrogen and Phosphate from the Anaerobic Digestion Reject Water Myllymäki, Pekka; Pesonen, Janne; Nurmesniemi, Emma-Tuulia; Romar, Henrik; Tynjälä, Pekka; Hu, Tao; Lassi, Ulla (Springer, 2020)The European Union’s circular economy strategy aims to increase the recycling and re-use of products and waste materials. According to the strategy, the use of industry waste materials and side flows is required to be more ...
The Use of Ca- and Mg-Rich Fly Ash as a Chemical Precipitant in the Simultaneous Removal of Nitrogen and Phosphorus - Recycling and Reuse Myllymäki, Pekka; Pesonen, Janne; Romar, Henrik; Hu, Tao; Tynjälä, Pekka; Lassi, Ulla (MDPI AG, 2019)The European Union’s circular economy strategy aims to increase the recycling and re-use of products and waste materials. According to the strategy, the use of industry waste material should be more effective. A chemical ...
Rossi, Laura; Reuna, Sini; Fred, Tommi; Heinonen, Mari (IWA Publishing, 2018)
Monitoring WWTP performance using size-exclusion chromatography with simultaneous UV and fluorescence detection to track recalcitrant wastewater fractions Ignatev, Alexey; Tuhkanen, Tuula (Pergamon Press, 2018)A trial monitoring of a typical full-scale municipal WWTP in Central Finland was aimed to explore applicability of high performance liquid chromatography – size exclusion chromatography (HPSEC) with simultaneous UV and ...