But this area in southern Sweden, best known as the home of Absolut vodka, has not generally substituted solar panels or wind turbines for the traditional fuels it has forsaken. Instead, as befits a region that is an epicenter of farming and food processing, it generates energy from a motley assortment of ingredients like potato peels, manure, used cooking oil, stale cookies and pig intestines.

A hulking 10-year-old plant on the outskirts of Kristianstad uses a biological process to transform the detritus into biogas, a form of methane. That gas is burned to create heat and electricity, or is refined as a fuel for cars.

Once the city fathers got into the habit of harnessing power locally, they saw fuel everywhere: Kristianstad also burns gas emanating from an old landfill and sewage ponds, as well as wood waste from flooring factories and tree prunings.

Over the last five years, many European countries have increased their reliance on renewable energy, from wind farms to hydroelectric dams, because fossil fuels are expensive on the Continent and their overuse is, effectively, taxed by the European Union’s emissions trading system.

But for many agricultural regions, a crucial component of the renewable energy mix has become gas extracted from biomass like farm and food waste. In Germany alone, about 5,000 biogas systems generate power, in many cases on individual farms.

Kristianstad has gone further, harnessing biogas for an across-the-board regional energy makeover that has halved its fossil fuel use and reduced the city’s carbon dioxide emissions by one-quarter in the last decade.

“It’s a much more secure energy supply — we didn’t want to buy oil anymore from the Middle East or Norway,” said Lennart Erfors, the engineer who is overseeing the transition in this colorful city of 18th-century row houses. “And it has created jobs in the energy sector.”

Both natural gas and biogas create emissions when burned, but far less than coal and oil do. And unlike natural gas, which is pumped from deep underground, biogas counts as a renewable energy source: it is made from biological waste that in many cases would otherwise decompose in farm fields or landfills and yield no benefit at all, releasing heat-trapping methane into the atmosphere and contributing to global warming.

In Kristianstad, old fossil fuel technologies coexist awkwardly alongside their biomass replacements. The type of tanker truck that used to deliver heating oil now delivers wood pellets, the major heating fuel in the city’s more remote areas. Across from a bustling Statoil gas station is a modest new commercial biogas pumping station owned by the renewables company Eon Energy.

The start-up costs, covered by the city and through Swedish government grants, have been considerable: the centralized biomass heating system cost $144 million, including constructing a new incineration plant, laying networks of pipes, replacing furnaces and installing generators.

But officials say the payback has already been significant: Kristianstad now spends about $3.2 million each year to heat its municipal buildings rather than the $7 million it would spend if it still relied on oil and electricity. It fuels its municipal cars, buses and trucks with biogas fuel, avoiding the need to purchase nearly half a million gallons of diesel or gas each year.

The operations at the biogas and heating plants bring in cash, because farms and factories pay fees to dispose of their waste and the plants sell the heat, electricity and car fuel they generate.

A municipal fire inspector making a fuel stop. Kristianstad’s municipal cars, buses and trucks now run on biogas fuel.

Kristianstad’s energy makeover is rooted in oil price shocks of the 1980s, when the city could barely afford to heat its schools and hospitals. To save on fuel consumption, the city began laying heating pipes to form an underground heating grid — so-called district heating.

Such systems use one or more central furnaces to heat water or produce steam that is fed into the network. It is far more efficient to pump heat into a system that can warm an entire city than to heat buildings individually with boilers.

District heating systems can generate heat from any fuel source, and like New York City’s, Kristianstad’s initially relied on fossil fuel. But after Sweden became the first country to impose a tax on carbon dioxide emissions from fossil fuels, in 1991, Kristianstad started looking for substitutes.

By 1993, it was taking in and burning local wood wastes, and in 1999, it began relying on heat generated from the new biogas plant. Some buildings that are too remote to be connected to the district heating system have been fitted with individual furnaces that use tiny pellets that are also made from wood waste.

Burning wood in this form is more efficient and produces less carbon dioxide than burning logs does; such heating has given birth to a booming pellet industry in northern Europe. Government subsidies underwrite purchases of pellet furnaces by homeowners and businesses; pellet-fueled heat costs half as much as oil, said Mr. Erfors, the engineer.

Having dispensed with fossil fuels for heating, Kristianstad is moving on to other challenges. City planners hope that by 2020 total local emissions will be 40 percent lower than they were in 1990, and that running the city will require no fossil fuel and produce no emissions at all.

Transportation now accounts for 60 percent of fossil fuel use, so city planners want drivers to use cars that run on local biogas, which municipal vehicles already do. That will require increasing production of the fuel.

Kristianstad is looking into building satellite biogas plants for outlying areas and expanding its network of underground biogas pipes to allow the construction of more filling stations. At the moment, this is something of a chicken-and-egg problem: even though biogas fuel costs about 20 percent less than gasoline, consumers are reluctant to spend $32,000 (about $4,000 more than for a conventional car) on a biogas or dual-fuel car until they are certain that the network will keep growing.

“A tank is enough to get you around the region for the day, but do you have to plan ahead,” Martin Risberg, a county engineer, said as he filled a biogas Volvo.

via: The New York Times

The project to build 2,000 wind turbines is intended to add 10 terawatt hours (TWh) a year. One terawatt is one trillion watts.

"This would be the highest share in the world," Olofsson said. No other country has such a high share of renewable energies. Actually, Sweden is already one of the most advanced countries in terms of usage of renewable energy. “Renewable energy makes up 40 percent of our energy consumption”.

Oil accounts for one third of Sweden’s energy system. In the 70s, oil represented more than 70% of the total energy supply. Thanks to diversification of fuels and an increasingly efficient use of energy, this percentage keeps going down.

Nowadays, around half of the electricity comes from hydropower, and nuclear power also plays an important role.

Among the renewable energies that have been growing in Sweden are biomass and wind energy. Biomass is very much used for heating. In fact, bio-energy has been growing very much in the last decades. In the 80s, it accounted for around 10% of the total energy supply; in 2004 that share had risen to 16% or 100 TWh. Some of the biofuels used include wood fuels, black liquors and tall oil pitches, and ethanol.

An interesting tool which is used by the Swedish government is the green electricity certificate system. Energy suppliers need to have a quota of renewable energy. The goal of this Renewable electricity with green certificates Bill is to foster the development of renewable electricity production. There are established targets of renewable energy growth rates which help determine quotas. Renewable energy producers are given certificates for every MWh of electricity produced, which can be bought by electricity suppliers, who need to complete their quota obligation.

VIA: Treehugger

Sweden Energy Policy

• US President Barack Obama was awarded the Nobel Peace Prize, and in his acceptance speech he emphasized the need for fighting climate change. He mentioned that from scientists and environmental activists to military leaders, the knowledge that “our common security hangs in the balance” is widespread.
• 100 nations are demanding more ambitious targets in terms of combating climate change. Among these, the 43-member alliance of Small Island States (AOSIS) is particularly concerned about the effect rising sea levels can have on them. The least developed countries (LDCs) and the AOSIS support the goal of limiting global warming to 1.5 degrees temperature rise. This would require at least a 45% reduction of greenhouse gas emissions by rich nations, from 1990 levels by 2020.
• A new draft, the “Copenhagen Accord” has surfaced, prepared by China, India, South Africa and Brazil, the four major emerging economies. The draft suggests that rich countries should reduce their emissions by more than 40% compared to 1990 levels, and that the Kyoto Protocol should include a “binding” amendment. The draft was posted by French newspaper “Le Monde” in its website. The “Copenhagen Accord” aims at keeping temperatures from increasing more than two degrees compared to pre-industrial levels. An interesting proposal is that emissions reductions should be achieved “mainly through domestic measures” and not so much through paying for offsetting in other countries.

• 
• Russian president Dmitry Medvedev will attend Copenhagen, on December 17-18. The fact that Medvedev has decided to participate in the conference means that leaders from the 15 most emitting countries will attend the COP15.
• Guess which was the most searched word in Google these past days? Copenhagen. This is yet another proof that the world is turned to this potentially revolutionary event, which will affect our world, and the world we leave to future generations.
• And last but… certainly not least; we have Sweden’s promise to give 800 million euro to help developing countries in their fight against climate change.

VIA: COP15

One of the latter is Malmo, a city located in the south of Sweden, with a population of about 280,000 people. Malmo has set itself the target of reducing carbon dioxide emissions by 25% between 2008 and 2012. By 2030, the city plans to run entirely on renewable energies. To achieve this, different measures are being applied.

To start with, sustainable transport is being promoted. Public transportation is being fostered, as well as car-pooling, a more eco-friendly way of driving, and more sustainable cars and buses. Regarding buses, these are connected to traffic lights, so as to get green lights faster than cars, and they have separate lanes. 42% of them run on biogas created from the city’s waste.

Eco-driving is taught to municipal employees; it is also offered in several driving schools, and it has been spread to some of the largest truck companies.

Besides, the city encourages the use of bicycles; it has more than 410 km of cycle ways, and in 2004 it was named Bicycle City of the year in Sweden. So far, one fourth of the city’s daily trips are made by bike!

Renewable sources of energy are being developed in Malmo. Among them, solar energy, specifically photovoltaic panels are being deployed all over the city. Malmo has the largest area of PV installations in Sweden, around 3400 m2. The city is investing a lot in solar energy. Also, the Swedish government funds PV technology, so the conditions are quite optimal. Other renewable sources of energy being developed in Malmo include wind energy, and bioenergy. About 25% of the heat energy comes from the city’s incinerator which transforms waste to energy. And 16% of the city’s heating comes from water warmed by the excess heat released from industrial plants in the area.

Attention is also being paid to energy efficiency. An interesting example is Sadelmakarbyn’s preschool, which is the municipality’s first low-energy preschool. Its walls are a half meter thick, to help insulate, and reduce the energy consumed for heating and cooling. Plus, in this preschool, lights are controlled by sensors. On the whole, since 2001, energy consumption has been reduced 20% in municipal properties.

Another interesting initiative is that schools will increasingly be offering healthier, greener food to its students. Nowadays, 50% of the food offered in schools is ecological, and the aim is to reach 100%.

Concerning recycling, 96% of household waste is collected. Whatever can be recycled, is in fact recycled. The rest is used to generate biogas, including food waste.

There are three main neighborhoods that are specifically being led to greater sustainability. These are Western Harbor, Sege Park, and Augustenborg.

Western Harbor runs exclusively on renewable energy, produced locally. Its main sources of energy are the sun, the wind, the water and organic waste. With the organic waste, biogas is produced, and with it some buses are powered.

Augustenborg is well-known for its green roofs. These reduce water runoff, help insulate buildings, and add vegetation to the area. The district also has photovoltaic panels, some of them used for shading. Besides, the world’s first emissions-free electric street trains were created there.

Way to go Malmo! A truly inspiring initiative.

VIA: HowStuffWorks (PDF)

Malmo

Fortunately, the scientific community is struggling to find new ways to store energy. Many are working to develop batteries made with non-metallic components. Among these compounds, conducting polymers are very promising.

Researchers at Uppsala University are looking to algae as a component for batteries. The so-called Cladophora algae produces an unusual type of cellulose, characterized by a large area, 100 times the area of cellulose found in paper. This creates a greater availability of conducting polymers, which allows to load, store and discharge electricity better.

One of the researchers on the project, Maria Strømme, who is working with nanotechnology at Uppsala University, Sweden, said that “This creates new possibilities for large scale production of environmentally friendly, cost effective and lightweight
energy storage systems.”

Apparently, one of the advantages of algae is that its conductive polymers are thin, allowing energy to be more easily loaded. They can store between 50 and 200% more energy than similar batteries that work with conducting polymers. And once they start working better they could even compete with commercial lithium batteries. Besides, this type of algae-based batteries are recharged faster than conventional rechargeable batteries.

Another benefit of algae batteries is that they have a much higher ability to hold energy even if used, charged and discharged several times. A similar battery loses 50% of its energy storage capacity after 60 cycles of loading and unloading. While the new battery decreases this ability in only 6% after 100 cycles.

Via:

LiveScience

Inhabitat