Case: Aquaculture RAS Tasmania
Challenge
Proper treatment of effluent from the new facility was fundamental for assuring government approval of the project.
- Removal of sludge and feed waste
- Removal of organic material and phosphorous
- Dewatering of the removed slam fraction
Solution
AL-2 Separation System installed in a purpose-built facility with operation and maintenance friendly environment
- Chemical-mechanical treatment of effluent
- Automatic operation and start-stop of the system
- Robust instrumentation and automation with online access
Effluent Treatment
Fish farm effluent is a combination of several streams which vary over the course of the day depending on cleaning of bio filters, increased faeces during feeding etc. The collective effluent has a high content of organics, fat and phosphorous which is not allowed to be discharged to the river.
AL-2 employs a three-stage coagulation process with separation on belt filters for the
The effluent is collected in a balance tank and equalised before treatment through an AL-2 Separation System. The treatment process is flow- and sensor-controlled chemical-mechanical treatment with separation on belt filters. The process captures SS, COD and phosphor, so the treated water can be discharged to the river and meet the consents.
The sludge removed by belt filters is further dewatered before being sold to a third party who mixes it with eucalyptus bark chip which is used as fertiliser in the local cherry tree orchards.
