1 February 2018
Take a moment to watch our EnviroNZ company profile video to discover some of the fantastic things we're doing with waste, and to learn a little about our people and
Follow this link and click the Watch Video button.
7 December 2017
Congratulations to Foodstuffs NZ Limited for winning the Efficiency Champion award, at the 2017 NZI Sustainable Business Network Awards, for a waste minimisation programme managed by EnviroWaste.
Foodstuffs, New Zealand's largest retail grocery organisation, has implemented a waste minimisation programme with a holistic approach to waste.
The company aims to maximise diversion of waste from landfill, with targets of 80% diversion for stores after 12 months on the programme, and 90% after 24 months.
For the 12 months to May 2017, the average diversion rate across stores on the programme was 82%, which equates to over 30,000 tonnes of waste diverted from landfill. Food waste comprised a third of this tonnage. The equivalent of 2.7 million meals were donated to food rescue organisations.
To achieve this, EnviroWaste manages the separate collection of up to 10 different waste streams from stores. In addition to the more 'traditional' recyclables such as cardboard, plastic wrap, co-mingled recycling and mixed paper, there is a strong focus on solutions for food waste. This includes food good enough to eat but not to sell, and wastage from food preparation or foods past their use-by dates.
The programme is constantly evolving. The recent focus has been on developing partnerships with food rescue organisations, and facilitating the recovery of food to help people in need in preference to animal feed or reprocessing.
MEDIA RELEASE - 5 September 2017
Associate Environment Minister Scott Simpson is sending a strong message of support to help New Zealand’s rural recycling programme meet an ambitious target to clear more waste. The minister announced his decision to extend accreditation of Agrecovery as a product stewardship programme at an accreditation ceremony in Auckland yesterday.
“This is a vote of confidence for our scheme which, since 1 July, is being solely managed by the Agrecovery Foundation,” says its general manager, Simon Andrew.
Since the programme commenced, Agrecovery has diverted 1,800 tonnes of plastic from landfill or from harmful disposal practices like burning. But Andrew says this is not enough and aims to boost recycling efforts to clear 60 percent of farm containers and drums by 2020. “This is a significant increase on the 40 percent we are clearing today,” he says.
The accreditation coincides with the launch of innovative, state-of-the-art equipment for collection of plastic from the agricultural sector nationally. Purpose-built mobile shredding units were developed by EnviroWaste Services Limited – the organisation charged with collecting the used chemical containers and drums across the country. The first of two mobile shredding units were unveiled at Agrecovery’s accreditation ceremony.
“By introducing this new technology to collect used containers, EnviroWaste will help drive greater levels of participation in recycling for the rural sector.”
The shredders have a greater capacity, a quicker processing time and are much quieter. “This allows EnviroWaste to respond quickly, especially in the busy season, where farmers and growers are returning lots of empty chemical containers and drums,” says Andrew.
Farmers and growers are able to drop off empty plastic containers, free of charge, at 74 drop off points across New Zealand through the programme. For those with high volumes, on-farm pick-ups can be arranged. Agrecovery also offers farmers and growers free disposal of large drums and unwanted chemicals.
25 July 2017 – Media Statement – Hon. Scott Simpson, Assoc. Minister for the Environment
The Government’s Waste Minimisation fund has granted $1.25 million to support the upgrade and recommissioning of EnviroNZ’s plastic extrusion plant in Christchurch, Associate Environment Minister Scott Simpson announced today while visiting the site.
The plant will be able to recycle over 1,000 tonnes of woven polypropylene bulk fertiliser bags into high quality pellets each year. These polypropylene pellets will then be used by New Zealand companies to make locally manufactured products such as irrigation tubing and rope.
The plant was originally acquired as part of EnviroNZ’s purchase of Christchurch-based Mastagard in 2014, but had been mothballed since 2012.
“This funding will enable EnviroNZ to carry out polypropylene recycling. The company will install additional bulk fertiliser bag processing and storage equipment, such as a shredder, wash plant, blowers and silos.
“By establishing essential infrastructure in New Zealand to recycle the used bags, EnviroNZ will help reduce the quantity of woven polypropylene bulk fertiliser bags currently being disposed of on farms.”
Fertiliser manufacturers and distributors Ballance and Ravensdown produce about 1 million single-use bulk fertiliser bags, approximately 3,000 tonnes. EnviroNZ has worked with Ballance and Ravensdown to establish a successful collection system to recover these bags from farms. Farmers are now sending on average 100 tonne of bags per month for recycling
To date the collected bags had been baled and stored, waiting to be exported offshore. Now they will be able to be processed onshore once the upgrade and re-commissioning of EnviroNZ’s plastics recycling plant is completed.
“It’s exciting to see EnviroNZ working with other New Zealand companies to recycle these bags in an environmentally safe way, and at the same time provide a primary source of material to another industry. Recycling and minimising waste is a key strategy for protecting New Zealand’s environment for future generations.”
The Government’s Waste Minimisation Fund was established in 2009 and is funded by a levy of $10 per tonne charged on waste disposed of at landfills. Over $80 million has been awarded to more than 130 projects to date.
1 March 2017
Too often, the words “sustainable living” and “landfill” are diametrically opposed. However, as New Zealand’s population ticks over 4.7 million, the humble and often derided landfill provides critical infrastructure to support the great lifestyle we enjoy within our communities.
The number of landfills in New Zealand has reduced markedly over the last 20 years. Back in 1995 there were 327 local landfills and today there are less than 50. Landfills perform an important role for New Zealand by providing an environmentally secure means for the disposal of residual waste.
There is a growing appreciation that waste is a resource and more materials are being recovered from the waste stream than ever before, with science and technology being used to recapture the value from these discarded materials. Furthermore, recent legislation (Waste Minimisation Act 2008, Climate Change Response Act 2002 and the Emissions Trading Scheme) provide additional drivers for greater waste minimisation and protection of the environment.
Waste volumes are linked to population and economic growth. When there is high GDP, waste generation typically outgrows waste recovery operations (hence, there needs to be an emphasis on not producing waste in the first place). Consequently, there is a continuing role for landfill disposal of residuals in our society. Landfills are no longer considered to be part of the linear disposal model but now are part of the circular model where wastes are stored long term until economic to be recovered. Landfill mining of historically disposed resources is now a growing trend across the world and recovery of landfill gas and its conversion to power is a common practice.
At EnviroNZ we believe in protecting the environment and minimising the use of non-renewable resources. We are actively involved in building circular solutions with our clients. Together with Foodstuffs, we are proud to have jointly won the 2016 WasteMinz Excellence Award for Best Project or Initiative in the Commercial or Public Sector. The initiative is the Foodstuffs waste minimisation programme designed to divert 80 to 90 percent of their stores’ waste materials away from landfill and into ten recycling streams. The programme is currently operated at approximately 100 stores nationwide. In the year to 30 June 2016 more than 23,500 tonnes of waste materials were repurposed and recycled.
Even with all the good work being done, there is still residual waste arising from today’s communities, commercial businesses and industries. It is regarded as residual waste because it is unable to be treated, recycled or recovered cost effectively (or energy efficiently). Its complexity, heterogeneity and randomness (both in quality and quantity) challenge the cost effective processing of this stream. As residual wastes arrive at the transfer station and/or landfill, any materials that are easily and cost effectively removed are recovered. What is left is disposed to landfill for long term storage. The challenge is to recover whatever is useful during this storage period.
Landfills have successfully managed the secure storage of residual solid waste in an environmentally responsible and cost effective manner for many years. There has been considerable technological advancement in landfill engineering and operation over the past decade. EnviroNZ believes landfills provide the optimal solution for the secure storage of residual waste for most locations within New Zealand and will continue to do so for the foreseeable future. There is unlikely to be a ‘one-size-suits-all’ technological silver bullet that outperforms the flexibility and cost effectiveness of an engineered landfill facility.
EnviroNZ owns and operates a number of highly engineered landfill facilities. Each of these facilities has been designed, consented, constructed and is operated to provide a high degree of environmental protection along with providing social and economic benefits to the communities they serve.
One increasingly important benefit from the landfill storage of residual waste, is the generation of landfill methane gas from the anaerobic biodegradation of its organic waste components. This methane can then be utilised for energy, either as a liquid or gaseous fuel, combusted to generate electricity or used as a raw material in chemical manufacture.
In today’s modern landfill, this gas is managed to ensure safety and to protect the environment. The gas is extracted from the landfill under vacuum via a reticulation network and used to generate electricity. Any extracted gas not used is flared. The production of gas within landfills typically increases as refuse is placed and then peaks as it decomposes. This is followed by a slow decline over subsequent years. The commercial lifetime of a landfill gas field is typically 10 to 20 years from closure.
Back in 1989, EnviroNZ (its predecessors and partners) installed and operated the first landfill gas to electricity (LFGTE) systems at the Rosedale and Greenmount landfills in Auckland. Both of these landfills are now closed. At their peak, the combined generation from these sites was approximately nine megawatts (MW), which was sufficient electricity to power approximately 7,200 homes per year. The electricity was generated by burning landfill methane gas in Waukesha VHP 7100 series, 12-cylinder gas engines. Today, the gas generation from these closed landfills has reduced considerably as both facilities ceased receiving waste in the mid 2000’s. Ten years later in 2016, the Greenmount LFGTE facility continues to generate approximately 1 MW, equivalent to the electrical demand of approximately 800 households. Now, at the end of its lifecycle, having played a critical role in residual waste management in South Auckland since 1980 and after 11 years as a cleanfill, the spectacular 54-hectare site has been returned to the local Council and will be developed into a public park. As demand for housing grows in Auckland and we see an increase in high-density housing, the park will provide greenspace with walking and cycling tracks for thousands of residents.
At our Hampton Downs Landfill facility (called “Hampton PARRC” for ‘Power and Resource Recovery Centre’) we have a very new and modern landfill gas to energy installation, which consists of a gas processing plant and seven specialist biogas engines. Each containerised engine generates approximately 1 MW of electricity and together the seven engines are capable of generating approximately 7 MW, which is sufficient to meet the electricity demand from approximately 5,600 households per year.
As the volume of residual waste stored at Hampton PARRC increases, the quantity of landfill gas will increase and more gas engines or additional landfill gas processing technology will be required to beneficially reuse the gas e.g. landfill gas to vehicle fuel.
At Hampton PARRC, landfill gas is extracted from the landfill using a complex system of gas wells and connecting pipework reticulated to the gas processing plant, via a series of blowers which draw the gas from the landfill under vacuum. This negative pressure on the landfill helps mitigate fugitive landfill gas emissions and odour. Before the landfill gas can be fed to the engines, it needs to be dried to remove any moisture, filtered, compressed, reheated and any silica contaminants removed.
The processed landfill gas is fed to the engines to generate electricity. The generation is equivalent to baseload as it is generally produced 24 hours per day, seven days per week, unlike other forms of renewable energy such as solar and wind. The 11kV electricity produced is transmitted under the Waikato River using the Counties Power Network to the Bombay grid exit point, where it enters the national grid network for distribution. The electricity is sold under a term contract at wholesale rates via an electricity retailer.
Hampton PARRC is at the forefront of where we see the future. A landfill site, which is a regional residual waste processing and storage site.
Hampton PARRC precinct is a large rural site of 350 Ha, appropriately consented with a buffer distance from neighbours of more than a kilometre. Already at Hampton PARRC we have the landfill gas to energy business, a greenwaste to high quality compost business using in-vessel GORE technology and a reverse osmosis leachate treatment plant that can recover up to 300,000 litres per day of high purity water. We also have a large worm farm, with approximately 12 million worms, to compost food waste. In the future we hope to build the country’s first regional (Auckland, Waikato and Bay of Plenty) food waste anaerobic digestion plant.
It’s easy to demonise waste, but it is also important that we approach waste as a resource that with continued innovation, can have significant environmental and economic benefits to New Zealand.
1 February 2017
Waiuta Prohibition Mine Site Remediation Case Study
From one of the richest gold mines on the West Coast in the early 1900’s to New Zealand’s most toxic contaminated site, remediation work on the Waiuta Prohibition Mine involved a combination of decontamination work and historic preservation.
Department of Conservation
EnviroWaste was contracted by the Department of Conservation (DOC) to carry out remediation of the Prohibition mine site at Waiuta.
1st August 2016
28th October 2016
Waiuta Prohibition Mine was opened in 1938 and was the site of a ‘roasting plant’ where arsenic-bearing ore was heated to release gold. Residue from this process contained high concentrations of arsenic which accumulated on the ground throughout the site.
The site was abandoned in 1951, but was later inherited and cordoned off by Department of Conservation (DOC) in 1987. It was not until 2005, that the full extent of the contamination from the historic mine was realised. The arsenic levels in surface water were among the highest recorded in the world, posing a serious risk to people and the environment.
EnviroWaste was contracted by DOC to carry out remediation of the Prohibition mine site at Waiuta. The remediation plan had four objectives:
Health and Safety was an extremely important aspect of this project, with a large amount of time and cost allocated to the protection of personnel health and site specific safety compliance.
The remediation of the site began on the 1st of August 2016. The work consisted of the removal of 96 drums of high level arsenic contaminated material for treatment at a hazardous waste facility, and the construction of a lined and capped containment cell, for the safe onsite disposal of lower level arsenic contaminated soil and other debris.The site was then capped with a layer of mullock to isolate any remaining residual arsenic contaminated soil, providing a safe layer of protection for the public. The concrete foundations of the historic mine were cleaned, removing contaminated dust and sediment. Some of the concrete areas which still contained elevated levels of arsenic after high pressure water cleaning, were coated with a concrete sealer to provide additional protection for visitors. Stormwater was diverted around the site via a series of swale drains, some lined with cement, to prevent further water contamination and erosion issues.
Following completion of the physical remediation works, the entire Prohibition mine remediation area was checked and validated for the presence of arsenic. Over 260 individual tests were carried out using x-ray fluorescence (XRF) soil testing technology. Results showed that arsenic levels were well below the target levels specified in the Remediation Action Plan. On-going testing of the area wlll safeguard both the surrounding environment and visitors to the site.
Feedback from Mark Davies, DOC Director Operations, Western South Island; “The EnviroWaste Technical Services team has worked in partnership with DOC, bringing their expertise, their commitment to worker and public safety, and their integrity to bear in the remediation activities for the Waiuta Prohibition mine site. They have delivered a timely and cost effective remediation solution to very high standards that paves the way for DOC to re-open the site so that visitors can safely explore, understand and appreciate its historic value.”
14 December 2016
Today marks a milestone for EnviroNZ returning the Greenmount landfill site to Council to develop it into parkland.
A truck delivered one of the last loads of topsoil to the site as part of an official ceremony attended by Lushington Estate members, Ngai Tai Ki Tamaki iwi, Panuku Development Auckland, the Howick Local Board and EnvironNZ staff.
The 54ha former quarry site in East Tamaki was decommissioned as a landfill in 2005. Since then it has been restored to close to its original landform through an extensive fill operation. Once remedial works are complete, the site will consist of a 70m high grassed dome with a flat peak. This peak has unique and spectacular 360 degree views of Auckland.
Managing Director of EnviroNZ, Gary Saunders, says the company's 11-year project to restore the site has been done with respect for the past and excitement for the future.
"We are very mindful of the Ngai Tai Ki Tamaki tribe's historic guardianship and involvement here, as well as the generous bequest to the local Council by the Lushington estate in 1932.
"Now, as we see the Howick Local Board take the leading role in the land's development into a place for everyone, EnviroNZ feels very proud to have been part of that process. Our commemorative gift to the people of East Tamaki to mark today's milestone is $10,000 of trees to enhance the park," says Mr Saunders.
The Howick Local Board will continue its planning to develop the site into a public park, plans for which it shared publically in April this year. Plans include areas for play, to walk and cycle, native planting and features to enhance the landscape and celebrate its history.
"This place has come a long way in recent years, and the board is excited about the prospect of being able to transform the land in to a public space for everyone to enjoy – including the many people who work in the Greenmount and East Tāmaki area," says Howick Local Board chair, David Collings.
"We've got funding committed to allow the first stage of works to start once the land is available to work on but it could still be a few years before the full vision of for the park is realised, but today marks a very significant step towards that vision becoming a reality. The community is really looking forward to it."
The park will opened to the public in stages as funding allows.
In the New Year there will be works to complete closure and removal of infrastructure not required for the future to prepare the site for development of the park.
27 October 2016
EnviroNZ is proud to have won a joint award with Foodstuffs, at the WasteMINZ Awards for Excellence last week, for Best Project or Initiative in the Commercial or Public sector. The initiative is the Foodstuffs' waste minimisation programme, developed by EnviroNZ in partnership, and is currently operated at almost 100 Foodstuffs' stores nationwide.
Since 2014, EnviroNZ has worked closely with Foodstuffs to divert 80 to 90 percent of their store's waste away from landfills and into up to ten recycling streams. These include the longstanding recycling of cardboard, paper and plastic waste, as well as the newer repurposing of surplus food fit for human consumption, plus bakery and produce waste for animal feed or reprocessing. In the year to 30 June 2016, more than 23,500 tonnes of waste was diverted away from landfills.
Foodstuffs reported that the programme isn't just good for the environment, but also makes financial sense. What was once seen as worthless rubbish is now a valued commodity, something other companies are prepared to pay for. Foodstuffs' average store is now saving more than $2,000 per month on its waste bill, which in turn ensures the programme's viability. Where possible the programme also aims to have materials utilised within New Zealand, thus further supporting the local economy.
EnviroNZ has put a huge effort into the programme to ensure that Foodstuffs is seen as a leader in sustainability. We will continue to pursue additional innovations for Foodstuffs that provide a point of difference, but more importantly, we will also provide an environmental outcome that all Foodstuffs stores can be proud of.
Congratulations and well done to everyone involved in helping us to achieve this esteemed award.
Waste collection in South and West Auckland is about to get a lot more colourful with the unveiling of a new EnviroNZ waste collection truck design in support of Cancer Society.
Today the team at EnviroNZ's Onehunga corporate office got a sneak peek of the new sunshine yellow and dark blue waste collection truck, featuring a giant Cancer Society daffodil. The truck is part of a new sponsorship relationship with Cancer Society Auckland Northland that will see EnviroNZ provide sponsorship to the Society over the next two years. The sponsorship will go towards funding research into the causes and treatment of cancer, as well as providing support services for people affected by cancer.
EnviroNZ managing director, Gary Saunders, says the 900-strong EnviroNZ team is proud to support a cause that touches the lives of
"Cancer does not discriminate. We all know someone who has been touched by cancer whether it be a family member, friend or colleague. EnviroNZ is proud to support Cancer Society and the incredibly important work they do in supporting Kiwi's living with cancer. We hope this will just be the beginning of a long-term partnership with Cancer Society," he says.
Cancer Society Auckland Northland Chief Executive, John Loof, says support from organisations like EnviroNZ is important in helping to support the Society's crucial work.
"We love the bright and beautiful truck and can't wait to see it out on the streets raising awareness for Cancer Society. Support from organisations like EnviroNZ helps us to continue to provide free practical support and care to people going through cancer treatment, fund vital cancer research and helps to reduce cancer for future generations."
The truck was unveiled at a fundraising event at EnviroNZ's corporate office today, the day before Daffodil Day on Friday 26 August.
EnviroNZ encourages everyone to give generously to street collectors for Daffodil Day, at their local ANZ branch or donate online at www.daffodilday.org.nz
In September this year, EnviroNZ completed its contracted work on the Rena clean-up. We've had a presence in Tauranga since offering our support to Maritime New Zealand on the 5th October 2011, when the MV Rena, the Greek owned container/cargo ship, ran aground on the Astrolabe reef.
Since then we've played a leading role in the clean-up, working alongside Maritime New Zealand, Oiled Wildlife Response Unit, Environment Bay of Plenty, Braemar Howells, Resolve Salvage & Fire and P&I Services.
Some of our clean-up work has included:
When you think about EnviroNZ, most people just imagine the rubbish or recycling truck coming down their street once a week. But our expertise is far broader than this, which is why we've been on-the-ground since day one, assisting other companies to play their part in helping to restore, as best as possible, the Astrolabe reef back to its original, prestine condition.
EnviroNZ was the first operator in New Zealand to generate electricity from methane gas produced from the degradation of waste in landfills. We started in 1992 at the Rosedale and Greenmount landfills in Auckland where we had 4 megawatts and 6 megawatts of generation capacity installed respectively.
Today we have 7 megawatts of generation capacity installed at our Hampton PARRC (power and resource recovery centre) facility in the North Waikato, where we produce sufficient electricity to power 5,000 households.
Landfills produce methane gas as a result of the natural anaerobic decomposition of organic refuse. In today's modern landfill, this gas is managed to ensure safety and protect the environment. The gas is extracted from the landfill under vacuum via a reticulation network and used to fuel engines that generate electricity. Any extracted gas not used to generate electricity is flared.
At Hampton PARRC the electricity produced is transmitted under the Waikato River to Bombay, where it enters the national grid.
The production of gas within landfills typically increases as refuse is placed and then peaks shortly after the landfill's closure. This is followed by a slow decline over subsequent years. The commercial lifetime of a landfill gas field is typically 10 to 20 years from closure. We still generate approximately 1 megawatt of electricity every hour from the closed landfill at Greenmount some 10 years after its closure.
EnviroNZ is extremely proud of the role we have played in developing innovative gas to energy technology in New Zealand.
EnviroNZ Corporate Office
345 Neilson St, Onehunga,
Private Bag 92810, Penrose,
Phone: 09 636 0350
Fax: 09 636 3561