Human waste sludge being trucked to treatment plant in southern landfill # update 2 (20/03/2020)
High-tech repair solution for Moa Point pipelines delayed by Covid-19 response
"Wellington Water has worked with a leading international engineering firm to develop an innovative solution to repair the high pressure sludge pipelines between the Moa Point Wastewater Treatment Plant and the Carey’s Gully landfill. However the global response to the Covid-19 pandemic will delay its installation.
The repair presents a significant engineering challenge, as it must be completed within the 1.8 km section of the pipelines running through a tunnel deep beneath Mt Albert. The solution that has been developed is a polyester woven liner which will be winched from one end of each pipe to the other, then expanded to essentially act as a new pipeline within the old.
The liner will be installed through the full length of the pipelines under Mt Albert, where they are most inaccessible. This will be the largest-scale deployment of this technology in Australasia.
Once in Wellington, the estimated timeframe for installation of the pipe liner is eight days.
Wellington Water CEO Colin Crampton says due to restrictions on business imposed this week by the German government, delivery of the liner by the supplier has been pushed back.
“This is a high-quality, robust and resilient solution that will get the pipelines back up and running, and reduce the risk of further bursts. It’s a high-tech specialist product which is not manufactured in New Zealand. Unfortunately, due the importance of protecting their workforce and community from the spread of Covid-19, production at our supplier’s factory has slowed.”
Mr Crampton says that current estimates are for the liners to arrive in Wellington by mid-May.
“We appreciate the ongoing patience and understanding of the communities in the area. Trucking operations are not ideal from anyone’s perspective, but they are successfully keeping millions of litres of wastewater from flowing into Cook Strait,” says Mr Crampton.
Mr Crampton says the long-term approach should be to decommission the underground sludge pipelines entirely.
“The solution we have developed has a working life of 10 years. This provides an opportunity for Wellington City Council to receive advice on what is the best way to manage sludge going forward. We are now developing alternative options for Council to consider which would enable us to stop disposing of sludge into the landfill entirely.”
Alexander van Paassen Manager, Community Engagement
Wellington Water
Calling All Puzzle Masters! Can You Solve This?
When John was six years old he hammered a nail into his favorite tree to mark his height.
Ten years later at age sixteen, John returned to see how much higher the nail was.
If the tree grew by five centimetres each year, how much higher would the nail be?
Do you think you know the answer to our daily riddle? Don't spoil it for your neighbours! Simply 'Like' this post and we'll post the answer in the comments below at 2pm.
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What's your favourite recipe for courgettes?
Kia ora neighbours. If you've got a family recipe for courgettes, we'd love to see it and maybe publish it in our magazine. Send your recipe to mailbox@nzgardener.co.nz, and if we use it in the mag, you will receive a free copy of our January 2025 issue.
Live Q&A: Garden maintenance with Crewcut
This Wednesday, we are having another Neighbourly Q&A session. This time with John Bracewell from Crewcut.
John Bracewell, former Black Caps coach turned Franchisee Development Manager and currently the face of Crewcut’s #Movember campaign, knows a thing or two about keeping the grass looking sharp—whether it’s on a cricket pitch or in your backyard!
As a seasoned Crewcut franchisee, John is excited to answer your lawn and gardening questions. After years of perfecting the greens on the field, he's ready to share tips on how to knock your garden out of the park. Let's just say he’s as passionate about lush lawns as he is about a good game of cricket!
John is happy to answer questions about lawn mowing, tree/hedge trimming, tidying your garden, ride on mowing, you name it! He'll be online on Wednesday, 27th of November to answer them all.
Share your question below now ⬇️
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