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Green waste biosolids composting trial continues

17 February 2016

This summer we've been accepting green waste that we can put through our Council's Biosolids Composter in Whitianga to produce high-grade compost to use on our parks and reserve, and the response has been great - thank you!

Greenwaste clippings that are a good example of what we want to mulch and compost with bio-solids from the wastewater treatment plant.
Greenwaste clippings that are a good example of what we want to mulch and compost with bio-solids from the wastewater treatment plant.

So far we've put 25 cubic metres of your green waste through our mulcher to produce 4-5m3 of mulch. This gets mixed with the biosolid product that comes out of our wastewater treatment plant and put through the composter to produce clean and safe Grade Aa compost.

Where to take your green waste

Map of greenwaste drop-off site at Whitianga wastewater treatment plant

It's a trial to see if we can save on sorting and mulching costs by asking people to bring useable green waste directly to a new site adjacent to the composter at 48 Moewai Rd.

Please drop off suitable green waste on Wednesdays from 10am-12 noon and Saturdays and Sundays between 10am and 3pm.

What sort of green waste do we want?

Here's a reminder of what type of green waste we can take to put through the bio-solids composter:

What we want:

  • Grass clippings
  • Hedge and bush clippings including branches that are no greater in diameter than 100mm. Branches must have green, leafy bits still attached - just like in the photo. No bare branches please.
  • Weeds - if they're mixed in with hedge and bush clippings

What we don't want:

  • Branches that are more than 100mm in diameter
  • Branches that have no leaves attached
  • Flaxes
  • Root balls
  • Soft species (they can't be mulched)
  • Plastic, cardboard and other household rubbish. This should go in your recycling wheelie bin or blue Council rubbish bags or be taken to the Refuse Transfer Station for disposal. See www.tcdc.govt.nz/rts for hours and locations.

If our trial results in the capacity to produce more than our parks and reserves team requires, we may look at making our Grade Aa compost available to crop farmers and private residents for their gardens as well.

For more information on the biosolids composter, see our web page www.tcdc.govt.nz/biosolidcomposter

Mulched green waste ready for the bio-solids composter:

Mulched green waste ready to be mixed with biosolids from the wastewater treatment plant and put through the composter to produce clean and safe Grade Aa compost.
Mulched green waste ready to be mixed with bio-solids from the wastewater treatment plant and put through the composter to produce clean and safe Grade Aa compost.

No rubbish please!

Please don't drop off root balls and household rubbish such as cardboard boxes and plastic bags - take them to the Refuse Transfer Station please!
Please don't drop off root balls and household rubbish such as cardboard boxes and plastic bags - take them to the Refuse Transfer Station please!

No flaxes please

We don't want flaxes because they're no good for the mulcher - take them to the Refuse Transfer Station for disposal please!
We don't want flaxes because they're no good for the mulcher - take them to the Refuse Transfer Station for disposal please!