Coagulation Flocculation Water Treatment

One of the challenges for any water or municipal wastewater treatment plant is being able to remove the vast majority of waste particles from the water quickly and efficiently.

Coagulation flocculation water treatment. Coagulation is a process used to neutralise charges and form a gelatinous mass to trap or bridge particles thus forming a mass large enough to settle or be trapped in the filter. Rapid sand filtration to enhance the ability of a treatment process to remove particles. Coagulation and flocculation water treatment chemicals are used to remove iron suspended solids organic color and hardness from influent water. In modern water treatment coagulation and flocculation are still essential components of the overall suite of treatment processes understandably because since 1989 the regulatory limit in the us for treated water turbidity has progressively reduced from 1 0 ntu in 1989 to 0 3 ntu today.

In water treatment coagulation flocculation involves the addition of compounds that promote the clumping of fines into larger floc so that they can be more easily separated from the water. Large heavy particles settle out readily but smaller and lighter particles settle very slowly or in some cases do not settle at all. Groundwater and surface water contain both dissolved and suspended particles. Written by aos treatment solutions on april 3 2018.

Coagulation and flocculation for wastewater treatment represent tested ways to improve. Coagulation and flocculation process fundamentals 1 coagulation and flocculation. Suspended particles cannot be removed completely by plain settling. Coagulation and flocculation are used to separate the suspended solids portion from the water.

What is coagulation and flocculation in water and wastewater treatment. Typical treatment processes consist of grates coagulation flocculation sedimentation granular filtration and disinfection. Worldwide a combination of coagulation sedimentation and filtration is the most widely applied water treatment technology and has been used since the early 20th century. Coagulation is a chemical process that involves neutralization of charge whereas flocculation is a physical process and does not involve neutralization of charge.

Coagulation flocculation is a chemical water treatment technique typically applied prior to sedimentation and filtration e g. Flocculation and sedimentation are widely employed in the purification of drinking water as well as in sewage treatment storm water treatment and treatment of industrial wastewater streams. Suspended particles vary in source charge particle size shape and density. Water supply system water supply system coagulation and flocculation.

Because of this the sedimentation step is usually preceded by a chemical process known as coagulation.