Hi all,
Sorry to take so long to respond. I'm going to try to reply here in
one message to the "what's wrong with biomass" thread that developed
in response to my "New Incinerators Planned for CA" message. I'm
updating the subject line accordingly. In the future, please update
subject lines if you're changing the topic. It really helps those of
us who are on over 300 email lists. Thanks!
First, let's clarify terms. When I use the term "biomass," I'm
referring to burning of certain allegedly "bio" feedstocks for
electricity. The term "biofuels" refers to the conversion of these
feedstocks to liquid fuels to be burned in the transportation or
heating fuels sectors. Bioenergy refers to both biomass and
biofuels. If I'm referring to wood pellet stoves, or other
applications of "biomass" being directly combusted for heating, I'll
mention this specifically. I do not consider that part of "biomass"
when I use the term, since I'm speaking about the electricity
sector. This doesn't mean that I support wood burning for heating,
but in my writing, please don't confuse statements I make about
"biomass" with wood burned for heating. [Briefly, on this topic, I
really appreciated seeing what Jeffrey Morris had to share on this
topic on 11/13. For more on the health and environmental
consequences of burning wood, see
http://www.burningissues.org]
What are "biomass" feedstocks? The term "biomass" is defined
differently everywhere you look... in different state and federal
laws and in private certification programs. Environmental groups
have varying ideas on what they think it means, and their ideas are
usually not as dirty as the definitions that end up in the bills they
still find themselves supporting. The biomass term has been used to
refer to processes that make electricity by burning: municipal solid
waste (trash), tires, construction/demolition wood waste, other wood
and paper mill wastes (even black liquor), crop and animal wastes,
energy crops, trees, landfill gas, and gas from digestion of sewage
sludge or animal wastes or other organic materials. "Biogas" is a
confusing term used by some to cover both digester gas and landfill
gas. Please don't use/encourage it. It's important that agencies
track these separately, though some combine them.
Biomass can involve the combination of nearly any one of the
above-mentioned feedstocks plus numerous processing technologies
(mostly forms of incineration, including gasification, plasma and
pyrolysis). Biofuels can also be produced from this same set of
feedstocks, but with a different assortment of technologies, such as
pyrolysis, acid hydrolysis, Fischer-Tropsch gas-to-liquids, thermal
depolymerization and cellulosic ethanol.
Finally, on terminology... please don't say things like "burning
biomass for energy" when you mean electricity. There are three
energy consumption sectors: electricity, transportation and
heating. This is how the Energy Information Administration tracks
it, and it gets confusing when some use the word "energy" to mean
just electricity. It also gets confusing when some groups talk about
"buildings" as if they're an energy use sector, when they really are
referring to parts of the electricity and heating fuel sectors.
Yes, we (Energy Justice Network, and the preponderance of the
grassroots activists we work with) oppose biomass
categorically. That's why we host an email list for "Biomass Opponents."
Rather than recite the litany of materials written up on why these
feedstocks and technologies are a problem, let me refer you to
several websites, then focus the rest of this message on the topics I
saw come up in the responses to my initial posting.
Trash incineration, gasification, plasma and pyrolysis:
http://www.energyjustice.net/incineration/
Biomass:
http://www.energyjustice.net/biomass/factsheet.html
http://www.energyjustice.net/biomass/
http://www.maforests.org/Biomess.pdf
http://www.massenvironmentalenergy.org/forestry.html
http://www.stopspewingcarbon.com/biomass-facts.html
http://www.nobiomassburning.org/
Biochar (a.k.a. charcoal or wood pyrolysis)
http://www.biofuelwatch.org.uk/docs/biocharbriefing.pdf
Construction/demolition waste:
http://www.actionpa.org/waste/cd/
[I have some great materials on this that I don't have online yet,
but can easily forward by email on request.]
Tire incineration:
http://www.energyjustice.net/tires/
Poultry waste incineration:
http://www.energyjustice.net/fibrowatch/
Landfill gas:
http://www.energyjustice.net/lfg/factsheet-lfg.pdf
http://www.energyjustice.net/lfg/
http://www.energyjustice.net/lfg/mercury/
http://www.energyjustice.net/resources/lfgbiomass.ppt
http://www.competitivewaste.org/documents/LNDFL-LFG-GHG-CA-ARB-5_000.pdf
[Much more info on this available by email on request.]
Digesters
http://www.energyjustice.net/digesters/
Norm pointed out that he supports conservation as a top priority. I
totally agree. I believe it should be followed by efficiency, just
as we follow Reduce with Reuse in the solid waste hierarchy before
backing Recycling. In the energy sectors, after conservation and
efficiency, we must move directly to clean renewables (those that do
not continue to create pollution per kilowatthour by consuming
feedstocks and creating wastes). You'll find this reflected in our
hierarchies chart here:
http://www.energyjustice.net/technologies.pdf (this is the one
Oakland drew from, as Peter so kindly pointed out).
Norm wrote about biomass: "But compared to fuel oil, coal fired
electricity, tar sands oil, etc it's a good thing." I think that's a
false comparison. It's like choosing between Coke and Pepsi when
we'd really prefer juice, or between Democrats and Republicans when
we'd really prefer Greens. The real comparison is between dirty
energy technologies (including nukes and all combustion technologies,
whether biomass or fossil fuels) and the real
solutions: conservation, efficiency, wind, solar and ocean power.
Some prefer to think of natural gas and biomass as "transition"
fuels, as if we need to invest and rely on them because genuine
solutions aren't get available. I don't believe that these are
transition fuels. I believe they're false solutions and are an
investment dead-end. If we spend money to do any sort of change, we
need to be moving directly to clean solutions, not differently-dirty
false solutions. We don't have the time or the economic resources to
waste on such "transition" fuels. See
http://www.energyjustice.net/solutions/transition.html for more on
why we don't buy the "transition" arguments.
First, some general arguments:
1) There is no such thing as clean combustion. All "biomass" is
incineration. All involves pollution and requires feedstocks,
whether waste-based or purpose-grown. They require production
systems and produce air pollution and solid wastes that aren't needed
since we can meet all of our electricity needs without burning anything.
2) Even if you assume that there are "clean" types of biomass, it's
important to recognize that these "clean" burners have an economic
incentive to burn dirtier feedstocks, like waste streams, since they
can get paid to take waste rather than pay for whatever organic
switchgrass you'd like to think they're using. Even if a facility's
permit doesn't allow burning these dirtier feedstocks (and many
permits DO), it's not hard to get the permits changed. I've seen
examples where state environmental agencies are urging a wood burner
to burn tires. They've also tried burning plastics. Once you give
the "biomass" industry a foot in the door, they jam the door open and
burn more toxic feedstocks.
3) Coal plants are looking at fuel-switching to biomass. This is a
dangerous trend, as state renewable portfolio standard laws and
upcoming climate legislation push companies to make this switch,
converting huge amounts of megawatt generation into biomass-eating
monstrosities. In South Point, Ohio, there is a proposal for the
nation's largest biomass incinerator, which would be 200 MW. The
proposal came in 2004, in response to Pennsylvania's renewable energy
law (before the legislation even passed). More recently, there's
also now a proposal in Shadyside, Ohio for a 312 MW coal power plant
to switch to 80%-100% biomass. Also, in the same area, a proposed
coal-to-oil refinery would use up to 30% biomass. The scale of these
proposals could cause massive damage to forests in the region as they
get logged to supply the needed wood to these projects. Other coal
plants around the nation, like one in Salem Harbor, MA, are
considering fuel switching from coal to biomass. The magnitude of
these projects will dwarf the already dangerous emissions and wood
supply problems posed by conventional (smaller) "biomass" incinerators.
4) Burning biomass (whether landfill gas, wood, poultry litter or
trash) releases more global warming pollution than coal plants. Put
a monitor on the stack of comparable-sized plants and there is no
question that this is true. The only way the biomass promoters get
away with claiming otherwise is via their bogus claims that the CO2
emissions don't count because the planting of new trees (which
doesn't even happen for many types of "biomass") sucks up the
CO2. However, the very long time frame needed to make things carbon
neutral undermines the entire purpose.
Here are some points to counter the confusion and concerns raised
around our position on digesters and on landfill gas:
The gas-based biomass sources (digester gas and landfill gas) require
more nuanced positions. We're 100% against any use of solid fuel
biomass combustion. Our position on digesters and landfill gas is as
follows...
DIGESTERS
If we're talking about animal waste, it's important to recognize that
these are usually done on large-scale operations, not mom-and-pop
little farms. While using digesters on CAFO waste streams is better
than letting it sit in open lagoons, aerobic composting seems
preferable to anaerobic digestion. Looking at the larger picture,
it's important that we do not create economic incentives to help keep
factory farms viable. This means that renewable energy subsidies
should never go to digesters. Digesters are a waste management
technology that factory farm operators should have to use if they
don't use aerobic composting methods. Ideally, the "reduce" part of
the 3 R's should be applied, and these animal factories should be put
out of business -- preferably by people curtailing their consumption
of animals, but of course few want to be told what to eat... and few
want to face up to the fact that moving our society toward a vegan
diet is an environmental and human rights imperative.
If we're talking about sewage sludge, this is a really tough issue,
since there are no good solutions to the sludge problem -- just bad
and worse options. Digesters are one of the less bad options, but it
still leaves a toxic sludge residue. Subsidy-wise, I'm fine with the
government subsidizing sludge digesters as a waste management tactic,
but it should not be subsidized through programs for renewable energy
where it'll compete with wind.
In the case of food or other relatively clean organic waste streams,
let's have that aerobically composted, not digested.
Wherever digester gas is produced, it's best to use it to displace
the oil and gas used in the heating fuels sector. Let's heat
buildings with it, not use it to produce electricity. This is
because it's more efficient to do so, but also because we can meet
the entire electricity sector with non-burn technologies. It's not
as quick or easy to do the same for the heating fuel consumption
sector, so if we have a source of methane-rich gas from animal waste
or sludge digesters, let it be used for heating. Such a policy also
makes it clean and easy to define our policies -- keeping digesters
out of electricity policies altogether while still providing valid
places for their use, where appropriate.
LANDFILL GAS
Landfill gas is a very confused and complicated subject. If you
haven't read our factsheet or some of the other material on the topic
(see the landfill gas links above), I suggest reading them if you
expect the following to make sense.
First, recognize that only 10-20% of landfill gas is ever collected
over the collective life of U.S. landfills. Also, burning landfill
for energy releases 20-40% MORE greenhouse gas pollution than simply
flaring the gas, even when accounting for displaced coal power on the
grid. This is due to the ways that landfills are mismanaged when
used for energy production. Peter Anderson has exposed this quite brilliantly.
Because of this fact, communities are exposed to more methylmercury
than they'd otherwise be, because more landfill gas escapes
uncaptured (and thus unburned). This is because landfill gas is one
of only two human-made sources of methylmercury (sewage sludge is the other).
The way to deal with landfill gas is as follows:
1) Treat landfill gas as a waste management issue, not an energy
issue. Don't subsidize it as renewable energy (which harms both the
wind market as well as recycling/composting markets).
2) Divert clean organics (not sewage sludge) from landfills.
3) Digest waste to stabilize it before landfilling (but don't pretend
that it's fertilizer or soil amendment!).
4) For the landfill gas that is generated at existing landfills:
-Minimize gas generation.
-Maximize gas collection.
-Filter the toxins out of the gas into a solid medium like a
carbon filter and don't subsequently burn the filters in carbon
regeneration plants, but store them indefinitely instead.
-Use the methane and CO2 in the remaining gas for heating or for
industrial feedstocks (or, as a last resort, flare it).
So... I'll stop this long message here. I'll address a few other
(more random) topics in a separate message.
If anyone has specific questions on anything I wrote above, feel free
to ask for more details or documentation.
Mike Ewall
Energy Justice Network
cata...@actionpa.org
http://www.energyjustice.net