Nutrient recovery from anaerobic membrane bioreactor permeate using ion exchange

摘要: Nutrient recovery from anaerobic membrane bioreactor permeate using ion exchange Patrick Mullen Marquette University, 2015 Phosphorus is a common element in wastewater streams and traditional treatment processes are often designed remove it to achieve low effluent limits. Such do not consider the potential value of nutrient. Currently, production phosphate fertilizers has dramatically risen causing concern for depletion rock reserves, bringing about exploration into alternative sources phosphorus agricultural use. Combining needs removal wastewaters securing alternate nutrient provide an opportunity recovery. This project evaluated process through with beneficial as precipitated struvite novel anion media loaded hydrated ferric oxide (HFO) copper (Cu) known literature Dow-HFO-Cu. Previous work defined capacity multiple cycles nor been tested permeates bioreactors (AnMBR). Batch tests were done determine Dow-HFO-Cu different regeneration solutions. Regeneration less alkaline solutions (pH=11) provided highest overall (PO4 ) 5 cycles, solution 2% NaCl + 0.5% NaOH providing Column treating lab-scale AnMBR performed over resulting capacities ranging 1.6 2.8 mg PO4-P/g media. From removed portion, PO4-P achieved 94% 79% mass was recovered during column synthetic real primary effluent, respectively. Ammonium (NH4 natural zeolite clinoptilolite batch demonstrated that more dilute sodium chloride regenerant concentrations could similar performance higher concentration NH4 showed decreased compared influent characteristics such organic matter likely reduced capacity. Precipitation eluate cation columns produced molar ratios Mg:NH4:PO4 best ratio 0.8:0.1:0.9, suggesting product may be struvite.