The effects of different surfactants (rhamnolipid, trehalolipid and citrate) on phosphorus (P) release and acidogenic fermentation of waste activated sludge (WAS) containing different aluminium phosphate forms (AlPO₄, Al(PO₃)₃) were investigated. Results showed that rhamnolipid was the most effective surfactant to release P from aluminum phosphates (AlPs)-rich sludge. Al(PO₃)₃ was easier to release P than AlPO₄ in WAS due to their different crystal structures. Different surfactants promoted the production of different types of protein. The addition of rhamnolipid was conducive to produce propionate from WAS, while trehalolipid and citrate increased the production of n-butyrate and acetate, respectively. Citrobacter played an important role in producing phosphatase continuously for P release with rhamnolipid addition. Predictive functional profiling indicates that rhamnolipid greatly facilitated adenosine triphosphate (ATP)-binding cassette transporter and quorum sensing. These important discoveries help to enrich P recovery paths from sludge produced with Al-based coagulants in wastewater treatment plants.

研究了不同表面活性剂（鼠李糖脂、海藻脂和柠檬酸盐）对含有不同磷酸铝形式（AlPO ₄、Al(PO ₃ ) ₃）的废弃活性污泥（WAS）的磷（P）释放和产酸发酵的影响。结果表明，鼠李糖脂是从富含磷酸铝 (AlPs) 的污泥中释放 P 的最有效表面活性剂。Al(PO ₃ ) ₃比AlPO ₄更容易释放P在 WAS 中，由于它们的晶体结构不同。不同的表面活性剂促进了不同类型蛋白质的产生。鼠李糖脂的加入有利于从 WAS 产生丙酸盐，而海藻糖脂和柠檬酸盐分别增加了正丁酸盐和乙酸盐的产生。添加鼠李糖脂后，柠檬酸杆菌在持续产生磷酸酶以释放磷方面发挥了重要作用。预测功能分析表明鼠李糖脂极大地促进了三磷酸腺苷 (ATP) 结合盒转运蛋白和群体感应。这些重要发现有助于丰富废水处理厂铝基混凝剂产生的污泥中磷的回收途径。