Effluent Screening and Equalisation Systems
topic
Textile effluent pre-treatment uses coarse screening to remove fibre and solid debris followed by equalisation tanks with submerged aerators and mixers that blend batch effluents from different dyeing processes into a uniform average composition flow, damping the flow rate and concentration peaks from batch dyeing operations that would otherwise shock biological treatment systems and prevent stable aerobic digestion operation.
Role
Provides the equalisation of flow rate and pollutant concentration required for stable downstream treatment by buffering the variable batch effluent composition from dyeing operations into a consistent average feed to biological and physical-chemical treatment stages, with inadequate equalisation causing treatment system upsets from concentration peaks that reduce effluent treatment effectiveness and risk regulatory discharge limit violations.