Removal and recovery of phosphate anion as struvite from wastewater

A novel anaerobic digestion system coupling biogas recirculation with MgCl2 addition for multipurpose sewage sludge treatment

“…S1 and S2). The peak positions in the XRD pattern of the sludge samples from the reactor +Mg+biogasR matched well with the reported XRD pattern of struvite crystals (Prywer et al, 2012;Chen et al, 2018). The struvite-like crystals could also be clearly noticed from the SEM image of the sludge sample from the reactor +Mg+biogasR (Fig.…”

Using Chemical Precipitation to Recover Struvite from Household Wastewater for Agricultural Fertilizer Utilization

“…In our studies, the NH 4 + -N removal efficiency achieved 90% when a buffering reagent was administered after the addition of magnesium and orthophosphate. It was discovered that the residual PO 4 3 and TSS concentrations were less than those from prior trials.…”

“…Anaerobic digestion systems 2 of 10 are used in treatment plants. A wastewater treatment plant is an opportunity for using a variety of methods to treat wastewater from factories and reduce its contaminants [3]. However, an enormous quantity of acid is necessary to break and eliminate struvite, adding to the cost [4].…”

The Simultaneous Efficient Recovery of Ammonia Nitrogen and Phosphate Resources in the Form of Struvite: Optimization and Potential Applications for the Electrochemical Reduction of NO3−

“…2− in the solution [24,25], which does not reach the optimal conditions for producing struvite precipitates, resulting in a slower rate of struvite crystallization and possibly the precipitation of other phosphate by-products such as Mg(H 2 PO 4 ) 2 . However, when the initial pH is above 7.0, the concentration of OH − in the initial reaction solution increases, leading to a final solution pH greater than 10 after the reaction.…”