Biosolids - Reports
Biosolids Transport Management Plan
Biosolids Transport Management Plan
Biosolids - Reports
Annual Reports
Biosolids Management Annual Report 2002/03
Biosolids Management Annual Report 2001/02
WWTP Biosolids Averages
Annual reports for monitoring of fly emergence - Agriculture locations
The Water Corporation transports and directly applies to land about 80% of the biosolids produced at the three metropolitan wastewater treatment plants.
Under the Western Australian Health Act (Fly Eradication Regulation) legal action may be taken against agencies and people whose activities are found to be conducive to fly breeding. The extensive transporting and temporary stockpiling of biosolids has the potential to facilitate the transportation of different fly species between areas and contribute to an overall increase in fly population. The Water Corporation is investigating methods to control fly strikes and is preparing a management plan to deal with this issue.
Several research studies have been conducted into the relationship between biosolids and flies and the final conclusions are that biosolids do not support fly breeding if the solids content is greater than 40%, stockpiling of biosolids is conducted during the cooler months (May to October), the biosolids stockpile is covered to restrict fly emergence or the biosolids stockpile period is minimal (estimated to be less than 10 days) whereby potential fly emergence is considered to be very low.
The Corporation plans to construct a trial central storage facility in the Agricultural Region, where most of the biosolids are currently applied. In the interim, a consulting entomologist monitors the temporary biosolids stockpiles and reports potential fly emergence which assists the Corporation in initiating the required contingency.
The reports below summarise annual monitoring undertaken by the consulting entomologist.