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RE: level of effort for mass balance?
We did a study for the Roundtable in conjunction with the Business
Roundtable that looked at the costs and benefits of facility level and
process level materials accounting. There are two reports.
The Phase I report is not on the NPPR website, the Phase II is
The Phase I report is probably more along the lines of what you are
looking for. I can email it to you if you like.
It also summarizes studies looking at tAt 03:13 PM 1/8/03 -0500, Burt
all for these interesting comments. I should clarify our goal
(thanks TF for asking).
The national environmental
health agency regulates wastewater dischargers and imposes a fee for
discharges. They are interested in an approach that will encourage
P2. We suggested that they provide discounts based on improvement
in management that will lead to P2, without requiring extensive technical
TA and while providing maximum flexibility to business. We are
suggesting that firms begin with a process analysis of inputs and outputs
so they can learn what exactly they are losing to the wastewater. I
used the term mass balance in my email to P2Tech without appreciation of
the engineering history behind it. In fact, here we have been
using the term "eco-balance", which is popular in Europe and
for which we have some guidance tools.
Of course we dont expect a full
scale mass balance analysis from anyone, and thanks for the comments
about how hard that can be. I think that materials accounting or
materials balance is a lot closer to what we want to promote. My
web search shows a lot more info about materials accounting than about
eco-balance, so I think we might move in that direction since it will
help the national agency think about making some links to the EPA and
other orgs (Hey New Jersey, how about a field trip to Peru!) so they can
get some more help on this.
I have been searching for a
good manual on materials accounting on the web and have not come up with
anything yet that can be downloaded. Any suggestions?
I also found a very interesting
analysis of materials accounting developed for national policy in
Australia, it includes a survey of materials accounting around the world,
comparisons of various methods, and lots of food for thought. Of
course if you consume the food you must account for the
- -----Mensaje original-----
- De: firstname.lastname@example.org
nombre de Robert Pojasek
- Enviado el: Miércoles, 08 de Enero de 2003 02:41 p.m.
- Para: email@example.com
- Asunto: Re: level of effort for mass balance?
- Maybe we have some engineers in government as well. The RCRA
reauthorization in the USA was going to require every facility with
compliance issues in the USA to conduct a mass balance.
Fortunately, the National Academy of Engineers recommended against this
(aren't they engineers?). The Cleaner Production Centers UNIDO P2
protocol requires mass balance. Burt talked about a government
agency wanting to require mass balance in a program. For the
record, this is not "materials balance." This was the
point that I raised. I think we are confusing these terms and the
level of effort required to make the proper measurements.
- Bob Pojasek
- Hi P2techies,
- Thanks Melinda for the clarification of terms "mass" vs
"materials" balance. We have to help engineers we are
training to relax a bit when they first hear about materials balance
requirements in the Massachusetts program. Burt's estimate is
really pretty good, with more time needed to characterize the process for
an external consultant new to the company or an EHS officer. The
three days certainly allows time to confirm the process diagram on the
shop floor. This is a key step in the planning requirement in this
state because of discovery or materials, water, and energy lost -- and a
loose but pretty good quantification of that loss. It is highly
- Janet Clark
- Toxics Use Reduction Institute
- University of Massachusetts
- One University Ave
- Lowell, MA 0`854-2866
- Tel 978-934-3346, Fax 978-934-3050
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