13+ YEARS 

Polyacrylamide (PAM) is a water-soluble polymer, often used as a flocculant in water and wastewater treatment. It is also known for its ability to bind soil particles, making it useful for erosion control and reducing runoff. 

Polyaluminum chloride (PAC) is a widely used coagulant in water treatment that effectively removes suspended solids, turbidity, and other contaminants from water. It's an acidic solution made of aluminum, chlorine, hydrogen, and oxygen, often known as Alum.

These carbon sources can be organic compounds, inorganic substances, or polymers, among other types of carbon sources. Composite carbon sources can provide a variety of nutrients for microbial growth and metabolic activities.

A custom carbon source refers to a carbon-containing material that is specifically designed or modified for a particular application or use. Involve tailoring the source's properties，customized development according to the actual situation of different sewage, to meet specific requirements.