(84aa) Demonstration of a Batch Electrochemical System for Phosphorus Recovery from a Real Municipal Wastewater Recycle Stream

2) Energy Conversion

3) Water Splitting

4) Water Treatment

Phosphorus is an essential nutrient for both animals and plants, but it has an adverse effect on the ecosystems of water streams due to eutrophication [1]. Phosphorus recovery from wastewater streams is an essential part of wastewater treatment plants to curb the destruction of ecosystems in downstream water bodies. The idea of recirculation of phosphorus from wastewater treatment plants to grain fields will not only provide a continuous fertilizer supply but it will also minimize the scarcity issues associated with phosphorus in the world of growing phosphorus demand [2]. Sustainable process of the phosphorus recovery in the form of fertilizer from wastewater treatment plants requires optimal reactor design, high recovery rates, and minimum energy consumption [3]. Electrochemical systems have an additional advantage of being utilized using renewable energy resources. In this study we have established a rational design for the sustainable removal of phosphorus using an electrochemical system in the form of struvite or brushite, which are magnesium-based and calcium-based phosphates, respectively [4]. A complete range of experiments were performed for the investigation of phosphorus recovery efficiency and the specific energy consumption during recovery. Chronoamperometry, Cyclic voltammetry and Impedance analysis were performed for a real wastewater sample to investigate the reaction mechanism, and energy consumptions. Liquid Chromatography (LC) and Inductively Coupled Plasma (ICP) were utilized to quantify the recovery rates in the liquid streams. Scanning Electron Microscopy (SEM), X-ray Diffraction (XRD) and Raman analysis were performed for quantitative and qualitative analysis of recovered solid products. These results will be presented at the upcoming conference.

References.

• Wang Yingmu, Ziyuan Lin, Yue Wang, Wei Huang, Jiale Wang, Jian Zhou, and Qiang He. Sulfur and Iron Cycles Promoted Nitrogen and Phosphorus Removal in Electrochemically Assisted Vertical Flow Constructed Wetland Treating Wastewater Treatment Plant Effluent with Jigh S/N Ratio. Water research 151, (2019), 20-30.
• Devos Perrine, Ahlem Filali, Paloma Grau, and Sylvie Gillot. Sidestream Characteristics in Water Resource Recovery Facilities: A Critical Review. Water Research 232, (2023) 119620.
• Pindine Garrett P., Jason P. Trembly, and Damilola A. Daramola. Equilibrium-Based Temperature-Dependent Economic Analysis of the Recovery of Phosphorus from Different Wastewater Streams via Chemical Precipitation. ACS ES&T Water 1, No. 11 (2021) 2318-2326.
• Belarb, Zineb, Damilola A. Daramola, and Jason P. Trembly. Bench-Scale Demonstration and Thermodynamic Simulations of Electrochemical Nutrient Reduction in Wastewater Via Recovery as Struvite. Journal of The Electrochemical Society 167, No. 15 (2020): 155524.