Pyrroloquinoline quinone (PQQ) is a small quinone molecule that has been gaining attention in the fields of nutrition and health due to its potential therapeutic effects. Discovered in the 1970s, PQQ is a redox cofactor that plays a crucial role in various biological processes, particularly in cellular energy metabolism and antioxidant activity. As research on PQQ continues to grow, its potential benefits for human health are becoming more evident.
Coagulants are essential in the coagulation and flocculation processes used in STPs. These chemicals help aggregate suspended particles in wastewater, forming larger clumps or flocs that can be easily removed. Common coagulants include aluminum sulfate (alum), ferric chloride, and polyaluminum chloride. The selection of a coagulant depends on the type of wastewater and the treatment goals. For instance, ferric chloride is often preferred for industrial wastewater due to its effectiveness in removing heavy metals.