COAG Tanks

Phosphorus Removal System

COAG Tanks are specialized units designed for phosphorus removal processes, consisting of two chambers equipped with top-mounted mixers operating at different speeds:

• Rapid Mixing Chamber:
  • Thorough mixing of wastewater with coagulants
  • Typically uses metal salts (ferric chloride or ferric sulphate)
  • High-speed mixer for optimal chemical dispersion
• Slow Mixing Chamber:
  • Dedicated to the flocculation process
  • Slower mixer speed for gentle particle combination
  • Promotes formation of larger "flocs" for easier separation

Alternative Configuration
COAG Tanks can be supplied with an inline mixing device for mixing of chemicals directly into the wastewater flow, which is then pumped into the Slow Mixing tank.

• Static inline mixing device
• Provides rapid mixing of chemicals directly into wastewater flow
• Eliminates need for rapid mixing chamber
• Reduces cost and space requirements
• Proven effectiveness in field applications

Downstream Treatment Options:

• Settlement in Lamella tanks
• Filtration through MITA Cloth Filters (particularly effective for fine suspended solids removal)

Standard System Configurations:

Model	Maximum Flow Rate (L/s)	Flow Rate (m³/hr)	Configuration Options
COAG-1	~18	~65	Dual chamber or inline mixing device
COAG-2	~33	~119	Dual chamber or inline mixing device
COAG-3	~50	~180	Dual chamber or inline mixing device
COAG-4	~68	~245	Dual chamber or inline mixing device

Note: The phosphorus removal process using ferric salts results in an increase in Total Suspended Solids (TSS). MITA filters are particularly effective in this application, as their cloth filter technology efficiently removes even very fine suspended solids.