Applying Natural and K-Enriched Zeolite Before Struvite Precipitation Improved the Recovery of NH4+ from Liquid Digestate and the Reagent Use Efficiency
Implementing nutrient recycling in wastewater treatment plants is essential for sustainable agriculture. In this study, we investigated a biphasic treatment system for anaerobic liquid digestate, which involved natural and K-enriched zeolite for NH4+ recovery (phase 1), followed by struvite crystallization under two conditions: NH4+ excess and Mg2+ excess (phase 2). The adsorption of NH4+ by natural zeolite enabled saving Mg and P reagents, used to achieve target Mg:NH4:PO4 ratios. The reagent use efficiency of struvite precipitation was highest with natural zeolite under NH4+ excess conditions (96%), whereas the other treatments exhibited lower yields. In this condition, the digestate enriched in Ca2+ released by zeolite; however, no P interferences occurred (Ca2+/Mg2+ < 0.5).
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LINK 4 - TÌM KIẾM SÁCH/TÀI LIỆU ONLINE (GIÁ ƯU ĐÃI NHẤT)
Implementing nutrient recycling in wastewater treatment plants is essential for sustainable agriculture. In this study, we investigated a biphasic treatment system for anaerobic liquid digestate, which involved natural and K-enriched zeolite for NH4+ recovery (phase 1), followed by struvite crystallization under two conditions: NH4+ excess and Mg2+ excess (phase 2). The adsorption of NH4+ by natural zeolite enabled saving Mg and P reagents, used to achieve target Mg:NH4:PO4 ratios. The reagent use efficiency of struvite precipitation was highest with natural zeolite under NH4+ excess conditions (96%), whereas the other treatments exhibited lower yields. In this condition, the digestate enriched in Ca2+ released by zeolite; however, no P interferences occurred (Ca2+/Mg2+ < 0.5).
LINK 3 - TÌM KIẾM SÁCH/TÀI LIỆU ONLINE (GIÁ ƯU ĐÃI NHẤT)
LINK 4 - TÌM KIẾM SÁCH/TÀI LIỆU ONLINE (GIÁ ƯU ĐÃI NHẤT)

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