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

Gordon Campbell: On Drone Strikes And Judith Collins‘ Last Stand

The news that a New Zealand citizen was killed last November in a US drone attack in Yemen brings the drones controversy closer to home.

To the US, drones are a legitimate response to the threat posed by the al Qaeda organisation and its franchisees... To the US, the drones carry the added advantage of not putting US troops at risk on the ground, and minimises the need for putting them in large numbers in bases in the countries concerned, always a politically sensitive point.

The counter-argument, well articulated by security analyst Paul Buchanan on RNZ this morning, is that this particular drone attack can be said to amount to an extra-judicial execution of a New Zealand citizen by one of our military allies, in circumstances where the person concerned posed no threat to New Zealand’s domestic security. More>>

 

Parliament Today:

Policies: Labour’s Economic Upgrade For Manufacturing

Labour Leader David Cunliffe has today announced his Economic Upgrade for the manufacturing sector – a plan that will create better jobs and higher wages. More>>

ALSO:

Gordon Campbell: On The Life And ACC Work Of Sir Owen Woodhouse

With the death of Sir Owen Woodhouse, the founding father of the Accident Compensation Scheme, New Zealand has lost one of the titans of its post-war social policy. More>>

ALSO:

Bad Transnationals: Rio Tinto Wins 2013 Roger Award

It won the 2011 Roger Award and was runner up in 2012, 2009 and 08. One 2013 nomination said simply and in its entirety: “Blackmailing country”... More>>

ALSO:

Select Committees: Tobacco Plain Packaging Hearings

The Stroke Foundation is today backing the Cancer Society and Smokefree Coalition who are making oral submissions to the Health Select Committee in support of proposed legislation to remove of all branding from tobacco products. More>>

ALSO:

Milk: Oravida Asked For Cabinet Help

New evidence released by New Zealand First today reveals Justice Minister Judith Collins used her position to manipulate the Government to help her husband’s company, Oravida, after the Fonterra botulism scare, says New Zealand First Leader Rt Hon Winston Peters. More>>

ALSO:

With Conditions: Ruataniwha Consents Approved In Draft Decision

The Tukituki Catchment Proposal Board of Inquiry has granted 17 resource consents relating to the $265 million Ruataniwha Water Storage Scheme in a draft decision that would open more of the Hawke’s Bay to irrigation. More>>

ALSO:

Fast Lanes, Campervans: Labour 'Making The Holidays Easier For Kiwi Drivers'

The next Labour Government will make the holidays easier and journeys quicker for Kiwi families driving on the roads, says Labour Leader David Cunliffe. More>>

ALSO:

Gordon Campbell: On Royalty And Its Tourism Spin-Offs

Ultimately the Queen’s longevity has been one of her most significant accomplishments. A transition to Prince Charles while the monarchy was in the pits of public esteem in the mid to late 1990s would have been disastrous for the Royal Firm. Far more congenial representatives have now emerged... More>>

ALSO:

Privacy (Again): ACC Demands Excessive Privacy Waivers

Labour: “This is just another example of ACC under National deliberately acting to deny treatment and compensation... Those who did fill in the form have effectively been victims of yet another ACC privacy breach. This time Judith Collins knew it was happening..." More>>

ALSO:

Get More From Scoop

 

LATEST HEADLINES

 
 
 
 
 
 
Regional
Search Scoop  
 
 
Powered by Vodafone
NZ independent news