International Renewable Energy Magazine


twitter_bird   linkedin

New DOPPSTADT HS 401 Selector reliably sorts out oversize

10 November 2015

Doppstadt Selector

Trouble with undesired oversize grain in shredder or grinder output? Never again reports Doppstadt. The new HS 401 „Selector” separates oversize material from each output fraction achieving your desired product. Combined with the pre-shredder DW 3060 Type F the Selector forms a compact, time- and energy-efficient shredding and screening system.

The combination system is suited for various input materials: Depending on the requirement, the DW 3060 Type F shreds biomass and waste wood with 0-300 mm grain size. Afterwards the HS 401 Selector separates the unwanted oversize material from the finished fraction. An integrated conveyor returns it to the pre-shredder to be shredded once again. This method ensures a faultless final product without oversize.

Solutions by means of modular strategy

The HS 401 Selector was specially designed to be combined with the technologically upgraded DW 3060 Type F. The advantages of the new pre-shredder: Shredding roller, tooth bar, teeth and Limiter elements - can be exchanged individually according to the material requirements and the required grain size. "Quickchange", a Doppstadt quick-changing system for the shredding roller change, "Variomat" for the tooth bar change and the quick-changing system "Dopp-Lock™" for an uncomplicated shredding tool change enlarge the range of applications of the DW series. Depending on the application there are now four different tooth sizes available for the F series.

Final product with high purity

The DW 3060 Type F discharges the output material directly to the HS 401 Selector: The Selector reliably separates contaminants and oversize material from the material flow and transports them once again to the shredding unit. The result: A highly pure final product. By the way, the Selector does not need its own drive. It is supplied by the additional hydraulic connection of the DW.

Modular tool parts, that means: flexible train of machines

Thanks to the modular strategy Doppstadt can offer flexible solutions that meet the customers’ requirements. All the machines can be modified and combined. According to the required result the relevant parts of the machines can be exchanged or complete machines can be combined to form new, interconnected processing lines. "This modular architecture mobilizes our whole machinery. This enables us to react comprehensively to our customers’ requirements", reports Thomas Diekmann, Doppstadt product manager.

Drax pulls out of £1bln carbon capture project, cites government policy as reason

28 Sept 2015


The UK renewable energy company Drax has pulled out of a £1 billion (appr. €1.4 billion) project to introduce carbon capture technology to cut emissions.

The company says it remains committed to fulfilling its current work on a carbon capture and storage (CCS) feasibility and technology development project (FEED), but once completed, would not be investing further and will withdraw as a partner of Capture Power, the developer of the White Rose CCS project.

The withdrawal comes in the aftermath of the UK government’s decision earlier this summer to cut subsidies handed out to green energy companies, which Drax says resulted in a critical lack of profits.

Drax CEO Dorothy Thompson says she is ‘very sad’ to make the decision and the company the White Rose project had lots of potential.

‘The most recent effect has been the government has removed a tax exemption for renewable power that is sold to industrial companies and we’re the largest generator of renewable power in the UK and this has suddenly removed a stream of income,’ she told BBC.

Drax’ shares plummeted over 30% immediately after the government announced the removal of green energy subsidies in late July.

The White Rose CCS project – led by the Capture Power partnership made up of Drax, Alstom, and BOC – had the potential to trap up to 90% of carbon emissions from a new coal fired power station next to Drax’ existing power plant in Yorkshire and store them beneath the North Sea, Drax says.

The company was fully committed to the completion of the feasibility study which is due to conclude in the next 6-12 months.

‘We remain fully committed to completing what we’ve signed up to – the completion of a study into the feasibility and development of world leading technology that could result in dramatic reductions in carbon emissions produced by power stations and heavy industry,’ says Drax group operations director and Capture Power board director Pete Emery.

‘We are confident the technology we have developed has real potential, but have reluctantly taken a decision not to invest any further in the development of this project. The decision is based purely on a drastically different financial and regulatory environment and we must put the interests of the business and our shareholders first,’ he continues.

In statement, the Department of Energy & Climate Change (DECC) says the CCS is set to play a vital role in decarbonising the electricity sector and heavy industry.

‘The government remains committed to assisting the development of CCS in the UK and to the CCS competition, continuing to negotiate with the two preferred bidders,’ DECC says.

But the chair of the Energy and Climate Change Committee, Angus MacNeil, says the government must take responsibility for Drax’ decision.

‘They certainly didn’t consider what they were doing and they’ve left Drax in a very invidious position at the moment. Drax itself would have been actually carbon negative, in that they were burning biomass and then were going to be storing that capture, so they would have been taking carbon out of the atmosphere,’ MacNeil says.

However, he adds, Drax’ decision is not surprising considering the UK government’s ‘wrecking ball’ approach to clean energy.

ENER-G publishes farmers' guide to the financial benefits of waste energy

30 June 2015

Biogas generation specialist ENER-G has published a free guide to help British farmers gain financial benefits from turning farm waste into energy via anaerobic digestion.

‘The Essential Farmers’ Guide to the Financial Benefits of Waste Energy’ details the financial incentives on offer. These include the government’s Feed in Tariff (FiT) and Renewable Heat Incentive (RHI), which can provide an attractive 20-year income for renewable energy generation. Other incentives are also highlighted, such as grants to assess feasibility of on-farm anaerobic digestion and business planning.

Farmers can use the guide to find out what factors to consider when assessing the economic viability of anaerobic digestion, including costs and potential savings, funding, planning permission, types of organic feedstock, and the benefits of replacing chemical fertilisers with the nutrient rich digestate that is a by-product of the anaerobic digestion process.

"Renewable energy from waste offers farmers an opportunity to bring in extra revenue and stabilise costs," said Martin Wager, Business Development Manager for ENER-G Combined Power Ltd. "Evaluating the commercial case for anaerobic digestion is complex, so the guide covers the key questions farmers should ask and the support they can tap into."

He added: "Anaerobic digestion may appear to be a complex and high capital option, but the technology is well understood and public and private funding is readily available. Farmers must do the maths, but luckily grants are available to help develop a business plan."

Download the farmers’ guide to financial benefits from anaerobic digestion at:

Groundbreaking event marks start of new biomass heat plant project

May 2015

On 11 May the US Department of Energy (DoE) Savannah River Operations Office (SR) and Ameresco held a ceremonial groundbreaking for construction of a new biomass heating plant project at DoE’s Savannah River Site (SRS).

The event will mark the start of phase two to the original energy savings performance contract (ESPC) to increase critical steam security and provide additional green power to SRS.

The modification is a subsequent phase to the task order executed in 2009 for the 20MW biomass cogeneration facility that Ameresco constructed, operates and maintains at SRS. For phase two, Ameresco will build a second biomass heating plant with a new boiler, fuel yard, truck tipper and additional plant auxiliaries within the existing 35-acre Ameresco site at SRS. Construction is scheduled to begin in June 2015, with expected operations starting next year.

DONG Energy divests its last waste-fired CHP plant

DONG Energy May 2015

DONG Energy has entered into an agreement to divest its waste-fired Måbjerg combined heat and power (CHP) plant near Holstebro to the Danish utility companies Struer Forsyning Fjernvarme and Vestforsyning Varme.

Thomas Dalsgaard, executive VP of DONG Energy Thermal Power, says: ‘The divestment is part of our strategy to focus on the central power stations in Denmark. With the agreement concerning the Måbjerg CHP plant, we’re divesting our last local CHP plant.’ In 2011, DONG Energy decided to focus on its large central power stations and since then has divested eight local biomass- and gas-fired power stations as well as six waste-fired CHP plants.

Dalsgaard continues: ‘We’re in the process of converting a number of our central power stations to using wood pellets and woodchips as fuel instead of coal and gas so that they contribute to Denmark’s green conversion. This is our core competence and what we should concentrate our efforts on. Our target is that at least half of the electricity and heat generated at our power stations must originate from biomass in 2020.’

DONG says that the divestment of the Måbjerg CHP plant to Struer Forsyning and Vestforsyning does not change the plans for the Maabjerg Energy Concept biorefinery where the CHP plant will use the biofuel lignin from the biorefinery.Dalgsgaard concludes: ‘The Måbjerg CHP plant is an important factor in the plans for the biorefinery Maabjerg Energy Concept and it is therefore very positive in relation to the realisation of the project that the new owners of the CHP plant will be the local utility companies in Struer and Holstebro.

‘The realisation of the Maabjerg Energy Concept depends on whether the Danish government introduces a requirement stipulating that at least 2.5% second generation bioethanol should be added to the petrol in order to create a market for the sale.

The agreement concerning the divestment of the Måbjerg CHP plant, which has been signed on 7 May, is expected to be implemented during the first half of this year and is, among other things, subject to approval by the Danish competition authorities.