Critical review on operation mechanisms to recover phosphorus from wastewater via microbial procedures amalgamated with phosphate-rich in side-stream to enhance biological phosphorus removal. (October 2022) - Habyarimana, Jean Luc
Abstract: Phosphorus is an essential nutrient needed for agriculture and the agro-industry. Excess discharges in water bodies are the leading cause of eutrophication, and phosphorus deposits worldwide are rapidly depleting. Numerous studies have been conducted to recover phosphorus from wastewater. However, its assessment is still necessary and urgent. The purpose of this review is to give an in-depth investigation of alternative phosphorus restoration techniques. Hence, the EBPR combined with side-stream phosphorus removal has demonstrated a more significant contribution to phosphorus recovery in different forms. The procedure relies on phosphorus-accumulating organisms (PAO) richness in activated sludge to rack up many poly-phosphate within their cell interior and then recover in the side-stream. In addition, the effects of various operational parameters on side-stream phosphorus recovery efficiency and the performance of the mainstream system were detailed, including volatile fatty acids, hydraulic retention time, the amount of oxygen in aerobic conditions, nitrite, and temperature and pH conditions. Ultimately, this review will help future research on phosphorus recovery to solve the severe issues of eutrophication and reduction of P resources. Highlights: EBPR is a wastewater treatment method to extract P from the activated sludge process. The effect of various operational parameters on side-stream phosphorus recovery. Enriching DPAO constitutes a potential strategy to balance the competition of VFA in BPR systems. DPAOs play a role in EBPR, specifically in removing phosphorus in wastewater. P-recovery helps to solve the severe issues of eutrophication and reduction of P resources.