Slow filtration operating conditions for the removal of opportunistic pathogens in a secondary effluent.

The secondary effluent of urban sewage treatment plants contains many opportunistic pathogens (OPs), which pose a potential threat to human health. In this study, the slow filtration technique is employed as the advanced treatment procedure, with the secondary effluent as the treatment object. The effectiveness of the operating conditions of the slow filtration process (filtration rate and Ca concentration) in removing OPs (Pseudomonas aeruginosa, Legionella and Mycobacterium avium) and Escherichia coli from water, as well as the dynamic deposition process of pollutants on the surface of the slow filtration biofilm, was investigated.

Emodin alleviates lung ischemia-reperfusion injury by suppressing gasdermin D-mediated pyroptosis in rats.

Background: Pyroptosis refers to programmed cell death associated with inflammation. Emodin has been reported to alleviate lung injuries caused by various pathological processes and attenuate ischemia-reperfusion (I/R) injuries in diverse tissues.

Methods: Lewis rats were assigned into the sham, the I/R, and the I/R + emodin groups.