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Archive for the ‘Pollution’ Category

Heavy industry in Iceland looks to CarbFix to become carbon-neutral

Iceland’s four largest CO2 emitters, three of which are aluminium smelters and the other a ferro-silicon plant, have signed a Letter of Intent with the Icelandic government to look for ways to become carbon neutral by 2040. The PCC silicon metal smelter at Bakki, which is another large emitter, is also expected to sign – “although our first priority is to get the operation running properly,” according to the environmental officer there.

The aim is to thoroughly investigate whether the CarbFix method for storing CO2 can become a viable option, both technically and financially, for storing CO2 emissions from these companies.

CarbFix was set up originally in 2007 in conjunction with the Hellisheidi geothermal power station, where CO2 is captured from steam and dissolved in water at pressure. The water is then injected into underground basalt rock at a depth of 500-800 m, where it forms carbonate minerals such as calcite within a few years. These carbonate minerals are stable on a geological time-scale.

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Annual capacity at the Hellisheidi plant is around 12,000 tonnes CO2, which accounts for about a third of the plant’s CO2 emissions. The Hellisheidi plant also removes hydrogen sulphide (H2S) from the steam, but this will not be an issue with the companies intending to become carbon-neutral by 2040.

In 2017, a pilot-scale Direct Air Capture unit was added to the system: this process is independent of location as it mostly relies on energy in the form of heat, which is available as a by-product in numerous industrial processes. Unfortunately the technique is currently too expensive to be used  for making heavy industry climate-neutral.

The project with heavy industry, which is expected to span five to ten years, will involve analysing the concentration of CO2 in emissions, so that similar removal techniques can be applied to those at Hellisheidi. The next step will involve design and manufacture of experimental equipment for capturing and injecting CO2, followed by design and manufacture of similar equipment on a larger scale.

The standard method of carbon capture and storage (CCS) involves pumping oil into old gas fields or using some form of carbon capture and usage (CCU). Edda Sif Aradóttir, who is project manager of CarbFix, says there are both advantages and disadvantages to traditional methods.

“The CarbFix method transforms CO2 into minerals within two years through a chemical process that happens naturally in nature, while traditional methods store CO2 in gas or liquid form. The procedure is thus of a completely different nature and CO2 is permanently removed,” she says.

She says that the main disadvantage is that it requires a considerable amount of water to dissolve the CO2 where chemical changes occur between water and rock. “On the other hand, the water needed by the procedure may be reused, which we in fact do up at Hellisheidi … we are working at developing the process even more so that seawater can be used,” she explained.

Funding for the CarbFix2 project has come from various programmes within the EU, including Horizon 2020, with collaborators in Toulouse, Barcelona and Zurich. CarbFix2 is designed to move the project on from a demonstration phase to one which will lead to an economically viable, complete CCS chain that can be used within Europe and globally.

Future research involves exporting the method to new injection sites in Germany, Italy and Turkey as well as Iceland, and further developing the method so it can be used offshore for permanent mineral storage of CO2 on the sub-sea floor. CarbFix proponents say that there is far more storage available in porous sub-marine basalts than required for the geologic storage of all the anthropogenic CO2 that will ever be produced.

I also wrote about this for ENDS Europe Daily today.

 

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Radioactive caesium in Danish district heating residues linked to Chernobyl

Repercussions are still being felt from the Chernobyl nuclear accident in 1986 in Ukraine, which at that point was still the USSR. See here for information in Danish.

Last year, radioactive caesium-137 was detected in ash from wood chips used in Danish district heating biomass plants. The wood chips were sourced from the Baltic countries, and the radioactivity is believed to have resulted from the nuclear accident. The burning process concentrates the radioactive material in the ash, which “might mean” that the ash must be treated as radioactive material according to Danish radiation protection law.

One of the district heating plants that use wood chips from the Baltics is Halsnæs Forsyning. There, about 30,000 tonnes of wood chips are handled annually, which results in approximately 800 tonnes of ash.

An Executive Order of the Danish Health Authority states that there are clear rules for how bio-ash should be handled and who is responsible. The individual district heating plant is obliged to know the ash content of radioactive substances.

The district heating organization District Heating DK have been researching the situation. Last year, a report that looked at 10 utilities showed that the radioactivity is so small that is is not likely to pose a health problem to workers or anyone else (!) but District Heating DK are doing another study that is designed to clarify the processes involved.

 

 

Call for Health Impact Assessment for Helguvik silicon smelter

I got a document yesterday from the Planning Agency (now available in Icelandic on the Net) because I’d made comments to a proposal for what should be covered in an environmental impact assessment concerning improvements to the closed-down silicon smelter formerly owned by United Silicon.

Besides allowing comments from the public (which they took no notice of, except to say that many residents had complained of health problems!), they’d asked for comments from bodies such as the Environment Agency, Directorate of Health, the local council, the Marine Research Institute, the Met Office and others.

Some of the information was particularly interesting. For instance, the Directorate of Health said that a Health Impact Assessment should be done because of all the complaints received from local residents. Stakksberg (the current owners) responded by saying that they were not aware of HIAs being done in Iceland, and until legislation was passed about HIAs, they were not going to do one!

When United Silicon was operating the plant, the temperature of the cooling water was 7°C and was discharged into the sea afterwards, when the temperature was not supposed to go over 10°C. Was this the case? No – the maximum recorded cooling temperature of the cooling water was 36°C! As a biologist, I was appalled by this. The draft EIA has to show how much area will be affected by the cooling water and what the temperature difference will be.

The Met Office were concerned about the aquifiers, which they said were very susceptible to disturbance in that area. They also said that there should be a scenario for when the worst possible weather conditions occur, i.e. calm weather/gentle breeze and also when there was high humidity.

They also had concerns about some of the substances emitted from the operation, some of which are bio-accumulative (or accumulate in soils) or do not change into less toxic materials. These substances include heavy metals such as arsenic, persistent organic compounds and sulphur compounds.

The Environment Agency said that because most of the odour problems occur when the smelter is not running at full capacity, a distribution model of pollutants should be done for volatile organic compounds (VOC) with different exhaust temperatures.

The EA also said that the option of not starting up the plant again should be considered.

Many other points came up too, and there were conflicting opinions from different agencies about whether a emergency chimney was needed or not.

I still suspect that the plant won’t start up again. Stakksberg announced long ago that they were trying to sell the plant, but they haven’t succeeded yet. They originally implied that they had no intention of running the plant themselves.

The document I received yesterday raised so many issues that I suspect it will take a long time to process them all.

Former United Silicon smelter rears its ugly head again

At a packed residents’ meeting last night over the future of the silicon metal plant in Helguvik formerly owned by United Silicon, Thordur Thordarson from Stakksberg said, in  response to a question about whether the thought had ever occurred to them to simply dismantle the plant, “Too much money has been spent on the silicon metal smelter already. If we abandon the aim of resurrecting the plant, it would be inexcusable handling of money.”

But the local campaigning group ASH say that they don’t want it to reopen.

Stakksberg is the company set up by Arion Bank to deal with the mess left by United Silicon. They intend to sell the plant when the extensive repairs and modifications have been completed. They say that the plant should be operational by 2020.

The meeting was called at two days’ notice. In the intervening period, considerable media attention was directed at the dormant plant, and the other silicon plant designed to be adjacent to the (Stakksberg) plant. The latter plant, which would be operated by Thorsil, had virtually disappeared off the drawing board as nothing had been heard about it for about two years – until someone from the local council said that the two silicon metal smelters would rescue Helguvik harbour.

The meeting, which lasted for almost three hours, consisted of explanations by Thordarson followed by powerpoint presentations by a Verkis engineer and a consultant from Norwegian firm Multiconsult. The first EIA for the Stakksberg/United Silicon plant was ostensibly prepared by Verkis, while Multiconsult were brought in last year to advise on problems – apparently, seven silicon metal smelters operate smoothly in Norway (though, unbeknown to the Multiconsult engineer, there appear to be health problems such as silicosis afflicting the workers).

Thordarson said that the “most able specialists” were advising Stakksberg. Note that United Silicon also said they had experts on hand to deal with any problems, and look what happened there.

Two of us brought up the matter of PCC Bakki, whose silicon smelter has been beset by problems and where start-up has not been easy, to say the least. Thordarson said he was not aware of the situation there, but “must look into it”. Unbelievable!!!

Other issues were brought up during question time. If Thorsil gets to operate with four furnaces and Stakksberg with four, how will anyone know which smelter is to blame if pollution levels rise sky high? No one knew the answer.

The Multiconsult person said that routine maintenance would mean that the furnaces would be shut down sometimes. Each time a furnace is restarted, there is the risk of burning odours. Multiply that by four (or eight) and there could be constant problems. One of the additions to the plant will be an emergency smoke stack that will operate during start-up. Some people are not convinced that this will make a difference.

Outside of the meeting, ASH is preparing a group lawsuit to call for a citizen’s referendum to try and stop the plant from becoming operational again.

A scoping document (in Icelandic) for a fresh EIA has been put forward and can be seen here.

 

 

High fluoride levels recorded again near Alcoa aluminium smelter in East Iceland

Routine measurements of fluoride in grass near Alcoa’s Fjardaal aluminium smelter in East Iceland have shown higher than permissible levels for June.

In East and Northeast Iceland, the summer of 2018 has been unusually warm and still, which causes thermal inversions in the fjord, Reydarfjordur, where the smelter is located. The thermal inversions can cause higher fluoride levels.

A 2013 report (in Icelandic) by the East Iceland Nature Research Centre (EINRC) and Innovation Centre Iceland mention thermal inversions and their effect on pollutants. The increase in concentration of pollutants is rapid and substantial when little or no vertical air mixing occurs. The lower the height of the inversion, the more rapid and greater is the concentration of pollutants. They say that the likelihood of thermal inversions is considerable. Also: “The effect of these conditions is probably greater than any other single factor in the measurement of pollutants in Reydarfjordur and affects all parameters as well as sulphur dioxide, such as air-borne particulates and fluorine/fluorides in the air, precipitation and vegetation. Special attention should be paid to the effects in the locality of the smelter.”

Alcoa say that it is important not to read too much into individual results as they can vary considerably for various reasons, including weather conditions. Measurements are taken twice a month by EINRC during the summer months of June, July and August. The average for June 2018 was 46.1 µg F/g, whereas the reference limit for sheep is 40 µg F/g – for horses, the level is much higher, Alcoa say. They say that sheep should not be affected unless they feed for a long time on grass or hay over the reference limits, based on consumption over a year.

However, “Fluoride is a cumulative poison, meaning that animals and plants often register higher levels of the element as they age,” I wrote in an article in Al Jazeera on fluoride pollution and farm animals. Levels of fluoride 12 times more than the reference limit were found in 2016 in the bones of lambs owned by Sigurdur Baldursson, a farmer I talked to for the Al Jazeera article. No doubt they will increase even more this year. He says that although he’s not concerned about the health of his animals because they are closely monitored, there are no Icelandic guidelines for fluoride in sheep bones.

Apparently hay samples did not show increased fluoride levels when samples were taken after the accidental release of fluorine from the plant in 2012, so maybe hay won’t be a problem this year either. However, it’s quite possible that fluoride levels in grass will be higher in July, too, due to the good weather in East Iceland, not to mention May which was also warm and sunny there but when recordings are not made.

We’ll see.

 

 

 

 

 

 

 

Micro-plastics from artificial turf prove problematic in Norway

Making use of recycled car tyres has its problems, as Norway has discovered.

Norway’s Environment Agency (EA) is proposing a new regulation to prevent the spread of micro-plastic from artificial turf into the environment. The regulation will call for the collection of rubber granules from artificial turf and will come into force in January 2019.

The granules, known as crumb rubber or styrene-butadiene rubber (SBR), are derived from used car tyres and are used as filler on synthetic ‘grass’ mats to get the grass to stand upright and to provide grip and damping. About 2 mm in size, the granules are used extensively in Norway’s many playing fields and are said to represent the country’s second-largest source of micro-plastic discharge, or up to 1500 tonnes annually.

The granules can be picked up by clothing and footwear and get carried down the drain when the clothing or shoes are washed. When snow is removed, crumb rubber is often removed too.

The EA propose that instead of removing snow and storing it outside of the field, the snow is stored in special snow ponds within the sports complex.

One of the proposals in the regulation is the requirement for a physical barrier around the course. The measure is effective, but can be expensive to implement.

The EA say that 10 percent of plastic infill is lost each year. “Many sports clubs are already making an effort to prevent micro-plastic discharge, but more needs to be done. It is possible to reduce emissions by up to 98 percent from such courses,” Ellen Hambro, Director of the EA, explains.

Crumb rubber is widely used in Europe for artificial turf. It has mostly been studied for its effects on health, as the granules can contain pollutants like PAH, phthalates, heavy metals and phenols, and is generally considered as safe, although a Norwegian report in 2006 concluded that it could have a significant impact on the indoor environment. Very little attention has been focused on its environmental effects up till now.

Some alternatives to crumb rubber, both chemical and organic, are already available but have their own problems. Others, such as sugar-cane granules, are currently under development and should be available soon.

Two interesting reports have been produced on the subject in the last year, one by the Norwegian EA on alternatives to crumb rubber and the other, environmental impact of artificial football turf, by the consultancy Eunomia for football association FIFA.

A modified version of this blog appeared in ENDS Europe Daily today.

Silicon metal plant at Helguvik may start operation in 2020

I didn’t think it was possible, but it looks like it is. Final touches are being made to designs for improvements to the  beleaguered silicon metal plant that was previously owned and operated by United Silicon. After United Silicon went into liquidation, Arion Bank took over and set up a new company, EB0117 ehf, that has the remit of getting the plant into a functional state again. img_0223

Apparently, some of the improvements will be subject to an EIA – I’d thought that the whole development would be subject to an EIA but it looks like this won’t happen.

The bank wants to sell the plant. Some buyers are said to have shown interest, including large companies that already operate silicon metal plants and are supposed to know what they’re doing.

The plan is for the plant to restart in 2020. Costs are expected to be around ISK 3 billion (almost 25 million Euros), but better estimates won’t be known until the autumn.

Meanwhile, PCC Bakki have announced that they intend to double the capacity of their silicon metal plant in the north as they will not necessarily have to invest in a great deal of extra equipment, with the exception of a building to house two extra furnaces. Admittedly, this expansion had been part of the original plan, but I suspect people are surprised that PCC is thinking about the expansion so soon, after experiencing various teething problems.

However, the expansion will need financing, and that process will take at least 1.5 years. Designing the expansion will probably take 4-6 months.

In the meantime, anything might happen.

Update: Recent council elections have led to a new majority in Reykjanesbaer, which includes Helguvik, which says it rejects the development of polluting industry at Helguvik and is opposed to the reopening of the silicon metal plant there. This might also mean that Thorsil will give up on its plan to set up a silicon metal smelter opposite the one previously owned by United Silicon.

Watch this space.

Update: It appears that the company known as EB0117 is now called Stakksberg and comments have been requested for a draft evaluation strategy (in Icelandic) (scoping document) for improvements to the plant. The deadline for comments is July 10.