A maize
(corn) field in Treviso ,
20th September 2019. (Davide Bonaldo, Alamy)
The Big
Biogas Business in the Veneto countryside
Elia
Cavarzan, journalist - translated from the Italian by Paul Tout
(from Internazionale magazine)
(from Internazionale magazine)
16th July
2020
This reportage was
possible thanks to a prize awarded during the Impact Journalism workshop,
organized by the NGOs Terra! All in the same dish and the Non profit network.
They supervised Fabio Ciconte and Stefano Liberti.
As you
wander through the countryside around Padua you immediately notice something.
The large green cylinders with white domes. There are lots of them and they’re
everywhere, surrounded by vast fields of maize (corn) and wheat. These are the
most visible signs of the industrial plants that produce biogas on the farms,
and that is gas obtained through the decomposition of a range of organic
substances. This decomposition process takes place inside the cylinders that
dot the countryside around the provincial capital of the Veneto . In the absence of oxygen and at
controlled temperatures, the vast number of bacteria break down the substances
and release biogas and digestate, a natural liquid fertiliser. This biogas is
then transformed into electricity using generator, while the digestate is used
as fertiliser on the surrounding fields. Built a decade ago to dispose of farm
waste and generously subsidized using public funds, many of these plants have
brought about a real agricultural upheaval in various areas of northern Italy .
“I’m
selling chopped maize to two one-megawatt plants” explains one supplier who prefers
to remain anonymous. Fifty years old and with an unconditional love for his
land, explains that “we are talking about five hundred tons of corn a day”. To
do this, the plants require 53 hectares (131 acres ) of land each
month. To get an idea, this is an area equivalent to 74 football fields. “It is
an impressive business, devouring agricultural land and disposing of very
little animal manure from farms because the ‘diets’ of biogas plants are
now all based on plant products.” This refers to the original idea behind the
state funding allocated in 2008 which was to create a virtuous agricultural
circuit capable of disposing of the sewage from intensive farms in the biogas
plants. This did not happen.
Now as
then, the biogas entrepreneurs work mainly with subcontractors. “They tell us
which fields to work on and we provide them with the product their company
needs,” explains the supplier. The owners of the fields are not usually
farmers, but entrepreneurs who own large tracts of land. They sell maize to
power the plants because it suits them much more, so much so that even the
smallest farmers, when the year is uncertain, are tempted to turn to biogas
entrepreneurs. This role play works and pays off. This is explained by a young
farmer from Treviso, also preferring to remain anonymous: “For about five years
I have only been working to bring corn, harvested a few months before ripening,
to nearby biogas plants. My 25 hectares of land are entirely
dedicated to this. And to tell you the truth, everything now revolves around
these biodigestors, and only in this way do we farmers survive”.
Few
answers
In the
Region Veneto (which includes Venice )
there are 256 biogas plants with a total power of 178.815 megawatts of
electricity (the abbreviation is Mwe, the unit of measurement for the amount of
energy supplied). The Region Lombardy (capital, Milan ) led the way in 2009. Today there are
554 plants, which produce 381.203 MWe. Emilia-Romagna (Bologna ) follows with 209 plants and Piemonte (Turin ) with 189.
In these regions a new agro-industrial team has been created which, over
the years and with ups and downs, has been able to interweave three parallel
universes of intensive animal husbandry, agriculture, and renewable
energy.
The
numbers are remarkable, although difficult to obtain. In Veneto, according to
the Regional Agency, Veneto Agricoltura, 61.6 percent of the plants
are entirely fed with maize, wheat, sorghum and triticale (a hybrid cereal),
and only 37 percent with manure.
In the
rest of the country it is difficult to quantify which substances the
biodigestors are consuming on a daily basis and which are the most important
ones and just how much farmed slurry they actually dispose of? The response
from the communication office of the Italian Biogas Consortium (the Cib) - the
first voluntary association bringing together biogas producing farms in Italy -
was a lapidary: “We are carrying out analyses and processing data in this
period. So these numbers are not currently available.”
A step
back
To join
up the dots that render the energy chain produced with biogas a unique one, you
need to take a step back. In 2008, the then government led by Silvio Berlusconi
tried to solve the problem of the disposal of livestock slurry by granting huge
incentives to agricultural biogas plants, paying 28 cents per kilowatt hour,
that is, four times the commercial value of the electricity
A
biogas plant that produces one-megawatt hour collects 280 euros per hour,
almost seven thousand euros in just 24 hours of fermentation. In 2008, building
a biogas plant cost around 1.6 million euros. With these incentives, you could
repay your investment in just two years.
The
2008 decree, voted and introduced in Italy seven days before
Christmas, provided for 28 cents per kilowatt-hour “for 15 years”. In 2013,
this unprecedented pay-out was curbed, reducing incentives by up to 50 percent,
based on the type of plant and its energy production capacity.
Some
farmers remember that back in 2008 people were seen running around the countryside
in Porsches.
The aim
of the decree was to help farmers who dispose of manure produced during animal
rearing. But entrepreneurs were to use the biogas plants as machines to make
money and take a breather during the economic crisis that began in 2008.
Everyone working on it immediately realised that maize harvested before
ripening or grains were better feedstock for the plants than manure because
starch ferments faster. And the Regions and public administrations adapted,
approving these types of projects. As one supplier, who (again) prefers to
remain anonymous says, “sometimes I have seen flour thrown directly into the
digesters to speed up the fermentation”. In many plants in Lombardy and Emilia-Romagna , it
was mostly maize, wheat, and sorghum that ended up being fermented.
Some
farmers remember that at the time people could be seen driving around the
countryside of the Po Valley in Porsches, getting out into the middle of
nowhere with a briefcase in hand, looking around and saying: “Here’s where you
have to build the plant”.
After
the bubble
After
the great bubble of 2009-2012, efforts were made to curb the speculation and
put the small agricultural concerns that actually used - and still use - small
biogas plants to create virtuous circuits of self-sufficient and circular
agro-industry back on their feet.
If we
take a look at the 2019 budget law, the incentives are mainly directed to those
producing only 300 kilowatt-hours and that can demonstrate a feedstock for the
plant composed of 80% of livestock slurry and the remaining 20% from crops
produced during the second harvest. Support is higher still if the energy is
reused for business processes and not sold on. In this way they have tried to
help those farming with a maximum of one hundred animals and who thus decide to
build their own small digesters for the disposal of the animal waster.
In spite of this, most of the plants produce around 999 kilowatt-hours. In Veneto more than
75% do so. This is because the state subsidies outlined in the 2008 decree
strongly incentivized the plants that were able to produce 1-megawatt hour of
energy.
A
challenge
Yet
biogas remains a valid and current challenge. David Bolzonella, Professor of
Chemical Plants at the University of Verona and a researcher in the
field of anaerobic biogas digestion, is convinced of this and speaks of “an
extremely relevant challenge”. According to his studies, many of which have
been conducted together with various agencies of the European Union, “the
potential that biogas has shown has been phenomenal in helping the Po Valley
agricultural sector and renewable sources, as well as the whole bioeconomy
sector in general”.
Bolzonella
explained that “after the big bubble two paths have become apparent. One of
these is speculative and the other innovative, the latter having reached very
high levels of excellence Italy .
I am thinking of a whole series of local agricultural concerns that have
decided to form consortia to create experiences that could become examples to follow
in order to make the agricultural world more sustainable”.
One
example is the cooperative La Torre in the province of Verona, which has
thirteen animal rearering businesses, seven thousand head of cattle and a
turnover of around €11 million a year ($USD 13 million, £GBP 10 million). With
its two biogas plants of one megawatt-hour it manages to dispose of almost all
the manure it produces. What remains, together with the wastewater that comes
out of the plants, is used across its thousand hectares of land.
But
there are also many other breeders who, using their biogas plants, manage to
completely dispose of the manure produced in their animal sheds, producing
electricity for their activities and saving thousands of euros in fertiliser
bills annually every year. All this takes place without them taking anything
away from agricultural production for animal feeds and even from products
intended for human consumption.