The invention belongs to the field of microbial
electrochemistry, and discloses a method for in-situ
recovery of high-purity
struvite through a microbial
electrolytic cell. The method comprises the steps that at least one of
phosphorus-containing
wastewater and
phosphorus-containing
sludge is added into the microbial
electrolytic cell after microbial acclimation, an external
voltage is applied tocarry out a microbial
electrolysis reaction for a period of time, and then
struvite sediment can be separated out, wherein the external
voltage is smaller than the electrolytic
voltage of water. According to the method, a microbial
electrolytic cell (MEC) technology is utilized, and micro-voltage less than that of electrolytic water is adopted so that the problems that the time for obtaining the
struvite through ectopic
crystallization is long, the purity is low, particles are small and the
sedimentation and separation performance is poor can be effectively solved, and the
electric energy consumption is greatly reduced. Moreover, the method is based on an in-situ reaction, on the premise that stirring is not needed, the
nucleation rate of
struvite crystals is increased, the growth rate ofthe
struvite crystals is increased, the limit of the growth of the
struvite crystals is broken through, the particle size of the struvite is increased, the purity of the struvite is improved, and in-situ
crystallization recovery of the high-purity struvite is achieved.