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EEB Comments to the
Commission Working Paper on Biological Treatment of Biodegradable
Waste from 20.10. 2000
Brussels, December 19,
2000
Foreword
EEB
welcomes this Working Paper, as it includes many of the
environmentalist positions e.g. as to:
o
The promotion of source segregation
o
The definition of common standards for the quality of compost, in the
view of a conservation of
the quality of soils across Europe
o
The promotion of decentralised approaches to composting, in order to
make it consistent with
the “proximity principle” whenever possible.
EEB
therefore asks for this Working Paper to be the premise for the
issuing of a Directive.
Some
remarks on the text do follow.
Cross-reference
to the Sludge Directive
Throughout
the process of defining the Directive on Biological Treatment, it
should be carefully kept a sharp difference among limits for:
-
compost from source separated, clean materials to be used as a product
(not subject to permitting)
-
sludge to be used in agriculture (subject to permitting requirements)
-
Stabilised Biodegradable Waste, if complying with limit values as set
out in annex III, to be used (under permitting conditions) only in
land reclamation and landscaping
As
to sludge we have to set a sharp difference between the Sludge
Directive and the Composting Directive. The former should cover less
qualified sludge, either composted or not; the latter should cover
high quality sludge, when composted. The composting process should
appear in both Directives, and when adopted under the scope of the
Sludge Directive (i.e. for less qualified sludge) its end product
should be allowed applications (such as public parks) restricted to
thermally or chemically treated sludge.
The
compost directive should anyhow include limits for detergents used in
food processing industry (LAS and NPE).
Definitions
We
would like to better define the following:
(8)
stabilised biodegradable waste- means the waste resulting from the
mechanical/biological treatment of municipal waste or residual
municipal waste
(9)
“composting” should also include in the definition its nature as a
“thermophilic process”
(13)
“community composting” should also include the concept of the use
of end product by the same group of people and should be defined more
completely as the “composting of biodegradable waste by a group of
people in a locality with the aim to produce their own compost to
be used by they themselves”.
(14)
mechanical/biological treatment - means the stabilisation of residual
municipal waste, municipal waste or any (as in the original text).
(19)
“residual municipal waste” - means the fraction of municipal waste
left over after source separation
including that of organic
waste
Community-,
home- and on-site Composting
We
support the views of the EC, that is meaning to “allow” and “promote”
Community Composting wherever social, urban and cultural conditions
are suitable. Community and On-Site Composting plays a key role in
many Regions in the UK, in Austria (rural composting run by farmers
for some hundreds families at some 50-100 tonnes per year)
sometimes in Luxembourg and outside the EU in Switzerland. It boosts
public awareness and complies with the proximity principle.
We
do agree that community composting, as long as the yearly compost
production does not exceed 100 tonnes (fresh weight) should be
exempted from certain provisions (permit requirement, reduced
frequency for analyses, labelling).
Home
composting and on-site composting should always be exempt from permit
requirement.
Separate
collection
We
support the Working Paper where it bans sink grinders; sink grinders
have always proven to be a
troublesome device as they:
o
Send biowaste into sewers, thus having much worse feedstocks as
biowaste gets “polluted”
along sewers by road dust, industrial waste waters, etc. In the view
to Composting Directive preserve the quality of soils as much as
possible, this pollution would then carry an additional pool –
beyond background concentrations and quantities - of heavy metals
towards the soil
o
When generally applied, put sewers under the threat of misfunctioning
o
They give a much lower public perception of the waste problem
o
They do not give any advantage – contrary to what dealers usually
boast – as to the collection of waste; only a minor part of biowaste
gets actually shredded, and only a minor part of households can apply
those (not to have the sewers misfunctioning ); therefore the
collection has to be run with same features as before and this leads
to overall higher costs.
Anaerobic
Digestion and application of the Digestate
We
think that some definitions and the cross-references to such concept
throughout the Paper, could be a bit misleading. Readers could be led
to think that it is mandatory to post-compost digestate, that is not
always the case, and – as a reaction - this could lead to a claim
for an unrestricted application of digestate
In our opinion, digestate could be directly applied on land, though it
should be considered as a “sludge”, thus submitted to restrictions
to its use (and consequently the need for a permit), due to its
phytotoxicity still relatively high, its high concentration in ammonia
and mineral N, etc. This doesn’t mean it has to be composted in
any case.
We
do know that in some Member states – contrary to what happens in
most situations
–
AD plants yield a digestate that is then being spread on land with no
further maturation / stabilisation (composting); this holds valid (and
sustainable) only as long as there’s a proper planning for
applications over the fields of many farmers. Should it be considered
as a “product”, being allowed application without any further
treatment as it happens with composted materials (provide they fall
within limit values for heavy metals, inerts, etc) we would loose any
control on applications; this would jeopardise the agro-ecological
situation in those many sites where farmers could be ready to get a
fee to have the digestate spread on their land, even at loads much
higher than needed
When
post-composted, the digestate could acquire the status of a “product”
and the further cost for its
treatment (meant to fix much of the mineral N onto humus-like
molecules, to loose residual phytotoxicity, etc.) would make not
feasible any more the payment of “spreading fees” to farmers;
instead it would push plant managers to develop marketing conditions
for the composted end-products therefore it would be used only as far
as its utility equals its cost, and over-loading would be
avoided.
Hence
we think that definitions and governance of Digestate should be
partially modified:
o
We could accept that digestate could be directly land-applied, but
only with restrictions and
under permitting requirements (the same as applies to sludge)
o
Only when stabilised (post-composted), it could be used with no
further restrictions neither the need for a permit, provide it meets
the tight quality requirements for heavy metals as defined for compost
in Annex 3.
Stabilised
biodegradable waste
The
use of stabilised biodegradable waste – when complying with limit
values as set out in Annex III - must be kept as restricted to land
reclamation and landscaping in oneoff applications.
Annex
I
Annex
I is missing the code 20 03 01
Sampling
requirements
They
should not apply to the stabilised biodegradable waste to be
landfilled.
On
the contrary, when stabilised biodegradable waste is to be used as a
substitute of soil in those applications that are not destined to food
and fodder crop production, sampling requirements should hold valid
and SBW should comply with limit values as set out by Annex III.
As
co-composting could be used as a way to dilute less qualified waste
streams, the Directive should define conditions (sampling frequency
and limit values) to control each waste input for composting to avoid
the dilution effect (before the mixture).
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