Local Govt | National News Video | Parliament Headlines | Politics Headlines | Search

 


Start Made on Napier’s Wastewater Treatment Upgrade


Start Made on Napier’s Wastewater Treatment Upgrade

Ground works are underway for the $30m upgrade of Napier’s waste water treatment at Awatoto.

The Waitangi Road site is being prepared for building a biological trickling filter (BTF) plant, scheduled for commissioning at the end of next year.

Planning for the development – one of biggest projects undertaken by the Napier City Council – started in 2007. In granting it a 25-year consent, the Hawke’s Bay Regional Council requires the new plant to be commissioned by 31 December next year.

Over a 10-week period, Holcim Hastings Quarry are delivering 30,000 cubic metres of crushed rock quarried in Mere Road, Fernhill, onto the site. Another month will be needed to compact the structural fill in 250mm layers, bringing the site for the planned new pump station up to ground level.

The site was excavated in 2004 as part of ground improvements required for the previous planned expansion of the plant. The new development is being built at the same location, next to the existing milliscreen plant, so the earthworks previously carried out are being utilised.

The Napier City Council expects a start will be made on constructing the main effluent pump station, the first major component of the plant infrastructure, in autumn next year.

Meanwhile, the High Court has instructed the Environment Court to hear the matter of Wayne Church’s appeal on the outfall discharge resource consent being lodged within the statutory time frame.

Tandem Treatment for Wastewater

The existing milliscreen plant has been treating the city’s wastewater since 1991. The BTF plant will provide a secondary treatment process to follow milliscreening and a new grit removal process.

BTF is a fixed-film biological treatment process that is very well established, both in New Zealand and overseas. Compared to many other treatment processes, it is relatively economical and simple to operate. Wastewater flows through tanks with plastic filter media on which an active bacterial mass establishes to feed on and transform human waste into a non-offensive bacterial biomass.

The Napier BTF plan will use structured media, which is used in the Gisborne BTF plant and has also been trialled in the pilot plant at Napier. The two tanks containing the media will be covered to control odour, with air treated in a biofilter field of chipped bark.

The system’s only moving part is a sprinkler arm for distributing the wastewater. Other major advantages of the BTF process are that there will be no sludge transportation or disposal costs and it avoids the use of chemicals, which would eventually become part of the discharge.

As the final stage in the process, the treated wastewater will flow through a Papatuanuku channel (an open channel filled with rocks) as a spiritual cleansing before discharge via a 1.5km outfall into Hawke Bay, south of the city at Awatoto. Scientific studies show that the receiving environment is well able to accept such a discharge.

A pilot plant has already been successful trialled on the Awatoto site under local climatic conditions and using Napier sewage.

The design will allow for other treatment stages to be added in the future if needed.

Preparatory work undertaken at the milliscreen plant earlier this year includes the installation of a new upgraded electrical system, new draft tubes for outfall pumps, the relocation of the internal wash water tank to outside the building, an upgrade of the ventilation system and cleaning down and repairing internal surfaces affected by corrosion.

At all stages in progressing plans for the upgrade, the Council has consulted with the Kaitiaki Liaison Group.
ends

© Scoop Media

 
 
 
 
 
Parliament Headlines | Politics Headlines | Regional Headlines

Open Source // Open Society - Full Coverage

Gordon Campbell:
On The Reserve Bank And Auckland Housing

The ‘crisis – what crisis?’ response by the government to the Auckland housing price bubble is no longer acceptable.

So says Reserve Bank governor Grant Spencer – who used unusually frank language in his speech and subsequent interviews yesterday to call for a capital gains tax, and to generally chastise central and local government for their inaction on a threat to the country’s economic health and financial stability.

That threat has been real for some time. The housing price bubble has already created a currency bubble... Undaunted, the government keeps calling this situation a success story. More>>

 

PARLIAMENT TODAY:

Bangladesh: GCSB Dragging NZ Into Human Rights Abuses

The New Zealand government should stop providing intelligence assistance to Bangladeshi security agencies that are known to systematically engage in human rights abuses, said the Green Party today. More>>

ALSO:

Troops Heading To Iraq: Government Must Come Clean On Deployment

New Zealanders deserve more than to hear about their troops’ deployment overseas from Australian media, Opposition Leader Andrew Little says. “News from Australia that Kiwi troops are on their way to Iraq this week is another example of the culture of secrecy and unknown protections around the deployment.” More>>

ALSO:

Image: Strikers And Protestors Join Outside McDonald's

A group of protestors took to McDonald’s Manners St today as a part of the international fast food workers day of action to end zero hour contracts. More>>

ALSO:

Greens: Special Education Funds Not Spent

More than $32 million of funding for children with special needs has not been spent by the Government, despite families of children with special needs complaining for years that they’ve been denied the support they deserve. More>>

ALSO:

John Key: Pre-Budget Speech To Business NZ

So this Government will remain relentlessly focused on improving the competitiveness of our economy... We will continue to give businesses a platform to invest, grow and create jobs in the knowledge they will be backed by a clear and consistent government policy programme. More>>

ALSO:

Multimedia: Andrew Little’s Response To John Key’s Pre-Budget Address

Labour Party leader Andrew Little spoke today on John Key’s pre-budget address this afternoon in Wellington. Little said National has had seven years to achieve a surplus and Kiwis have “fufilled their end of the bargain.” More>>

Surplus Baggage: Key Backs Off ‘Artificial Target’

John Key’s attempt to redefine his cornerstone promise of two election campaigns as an artificial target suggests his other promises are works of fiction, says Labour’s Finance spokesperson Grant Robertson. More>>

ALSO:

Gordon Campbell: On UE Pass Rates And University Dropout Rates

Houston, there is clearly a problem with (a) the plunge in pass rates for University Entrance qualifications, which has been especially steep among Maori students and also a problem with (b) the failure rates for Maori students among those who reach university... Unfortunately the two problems seem related. More>>

Get More From Scoop

 

LATEST HEADLINES

 
 
 
 
 
More RSS  RSS
 
 
 
 
Regional
Search Scoop  
 
 
Powered by Vodafone
NZ independent news