Hazeldene’s Wastewater Treatment Plant Upgrade, VIC

The Client

Hazeldene’s Chicken Farm

Incorporated back in June of 1957, Hazeldene’s Chicken Farm is a proud family-owned and operated business. It is a major regional poultry processor. Hazeldene’s is the largest private employer in Bendigo, employing more than 750 locals directly as well as contracting more than 400 experts within the business in specialised roles. The company annually processes millions of chickens in its plant near Bendigo, Victoria and supplies the wholesale and retail markets with a wide range of whole birds, portions and valued added items.

The Client’s Needs

Hazeldene's Chicken Farms had an existing wastewater treatment plant that could manage the current effluent volumes and loads but had suffered from a lack of expansion capacity and age. Some of the wastewater treatment plant's major systems (the blowers) were at the end of their life and required replacement. Also the lack of an equalisation tank meant that the treated water quality was inconsistent. The existing DAF units were not allowed to operate efficiently due to poor initial design. The irrigation of the treated water was restricted by the high nutrient levels.

Veolia's Solution (1250 m³/day)

Veolia Water Technologies was awarded a contract to design, build and commission an upgrade of the existing wastewater treatment plant to produce treated waste water in compliance with Class C+ quality requirements. The original wastewater treatment plant consisted of primary DAF 1 + activated sludge (aerobic and anaerobic cycles) + secondary DAF 2. To achieve Hazeldene’s treated water quality requirements for discharge, Veolia proposed a solution that included:

  1. Installation of an Equalisation Tank for incoming wastewater
  2. New Hydrex™ chemistry program for both DAF units
  3. Installation of MBBR™ technology prior to the existing activated sludge tank
  4. Installation of a Hydrotech discfilter after DAF 2 for final effluent polishing 

The design included adequate redundancy at each process step to manage any plant process failure. This included practices such as duty/standby on all critical pumping equipment, extra storage/process capacity on EQ tank and MBBR, final suspended solids polishing after DAF 2, and by-pass options on all processes.

By improving the treated waste water quality, Hazeldene’s Chicken Farms avoided:

  • any production disruption and therefore production loss
  • the cost of connecting to the Municipal sewer network