In this study, alkaline fermentation was applied to promote organics and P recovery from polyaluminum chloride (PACl)-enhanced primary sedimentation sludge. Coagulant results demonstrated that the optimum PACl dosage of 100 mg/L resulted in the effective concentration of 73% of organic matter and 90% of P from wastewater into sludge. Batch fermentation results highlighted the ability of alkaline fermentation in improving the biodegradability of PACl sludge. More specifically, at pH 11, 43.3% of soluble organics and 36.49% of P were released to the fermentation supernatant. Furthermore, P fractionation fermented sludge results revealed that partial Al-P dissolution and organic phosphorus hydrolysis were the main drivers of the released P. Finally, at pH 11, 85% of P was recovered as magnesium ammonium phosphate from the fermentation supernatant at the 2:1 Mg/P molar ratio. In conclusion, 24.9% of organics and 27.9% of P from raw wastewater were converted to valuable products via alkaline fermentation.

在这项研究中，应用碱性发酵来促进从聚氯化铝（PACl）增强的初沉污泥中回收有机物和磷。混凝剂结果表明，最佳的PACl剂量为100 mg / L时，有效浓度为73％的有机物和90％的P从废水进入污泥。分批发酵结果突出了碱性发酵在改善PACl污泥生物降解能力方面的能力。更具体地，在pH 11下，43.3％的可溶性有机物和36.49％的P释放至发酵上清液。此外，P分馏发酵污泥的结果表明，部分Al-P溶解和有机磷水解是释放P的主要驱动因素。最后，在pH 11下 从发酵上清液中以2：1 Mg / P摩尔比回收了85％的P，为磷酸铵镁。总之，通过碱性发酵将原废水中的24.9％的有机物和27.9％的P转化为有价值的产品。