Biosolids Production in New Zealand – 2015
The total biosolids production of New Zealand identified in the ANZBP commissioned 2015 biosolids survey was approximately 77,000 tonnes per year of dry solids. This is an increase on the 74,000 tonnes produced in 2013. The solids content of the dewatered biosolid ranges from 2% to 96%, with an average of 18%. Approximately 440,000 tonnes of dewatered biosolid is produced per year, which is comparable to the 400,000 to 500,000 tonnes produced in 2013.
Biosolids End Use in New Zealand – 2015
The end use of biosolids in New Zealand is presented below: In 2013 the total percentage of biosolids sent to landfill was 60%. This has remained approximately the same with 61% of biosolids going to landfill in 2015. The variety of biosolid end uses has also remained the same including land rehabilitation, agriculture and landscaping. The percentage used for land rehabilitations has reduced from 10% to 5%, and the percentage discharged to ocean increased from 10% to 18%.
ANZBP members can review these statistics in more detail and explore the other insights gained in this and previous surveys here.