an environmental assessment method for cleaner production technologies
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and packaging profiles that describe all material and energy flows related
for determining an integrated index for overall environmental assessment of cleaner production technologies.
The presented method can be employed to evaluate environmental nuisance of implemented, modernised and modified technological pro-cesses and products as well to perform comparative analyses of alternative technologies. 2005 Elsevier Ltd. All rights reserved.
Keywords: Cleaner production; Technology environmental assessment; Profile unit indices; Integrated index for environmental assessment of cleaner productiontechnologies
An environmental assessment, in particular a valuation ofenvironmental impact of technical facilities, is a relativelynew research subject. Previously, the related research studieson pollutant emission levels, volume of generated wastes ordischarged effluents, documented relationships between themanufacturing activity and deterioration of environmentalquality. As a result, increasingly pressures are being broughton companies and industrial regions to make dramatic im-provements in their environmental and economic performance,at the same time.
Currently, there is an increasing awareness and acceptanceof environmental problems caused by human activities andtherefore, the urgent need to reduce the adverse environmental
cleaner production strategy, to reduce such negative impacts,the author believes that an overall assessment of technologicalprocesses for their harmfulness to the environment to findrelationships between indices describing environmental nui-sance of industrial activities and the manufacturing processesis of great importance.
Therefore, to improve implementation of the concepts andapproaches of Cleaner Production, i.e. application of the over-all preventive environmental management strategy for pro-cesses and products, it is necessary to develop tools thatenable one to quantitatively analyse relative environmentalimpacts for proecological measures to be taken to replace cur-rent practices.
Several methods [1e13] are employed to perform such as-sessments, mainly those using the following procedures:An environmental assessment mtechno
Department of Technology and Ecology of Products, Cracow U
Received 4 February 2004; a
An environmental assessment method for cleaner production technosented.
The proposed method is based on material and energy flows and uses
Journal of Cleaner Productionimpacts of manufacturing processes and products. In order toassist corporate and regional leaders to make further progresswith implementing preventative approaches such as the
E-mail address: firstname.lastname@example.org
0959-6526/$ - see front matter 2005 Elsevier Ltd. All rights reserved.doi:10.1016/j.jclepro.2005.11.019ethod for cleaner productionlogies
iversity of Economics, Rakowicka 27, 31-510 Krakow, Poland
ccepted 11 November 2005
4 January 2006
logies enabling quantitative analysis of environmental impact is pre-
a set of profile indices, including raw material, energy, waste, productto the technology under investigation. The indices are used as a basis
15 (2007) 914e919www.elsevier.com/locate/jcleproe Environmental Impact Assessment (EIA) to evaluateplanned projects (including technological process);
e Life Cycle Assessment (LCA), i.e. environmental impactassessment related to the whole life cycle of product (facil-ity), including all life cycle steps.
Both methods are based on assessment of predicted envi-ronmental impacts related to the evaluated product (facility).
Regardless of facility to be assessed, both methods use thesame or similar tools, including, for example, checklists, ma-trix methods, networks, histograms or multi-criteria decision-making models [12,14].
In both methods an assessment includes important compo-nents such as:
e environmental characteristics of the technology, ande environmental characteristics of the product.
These procedures are most often used separately and con-sist of individual assessments of hazards of the analysed tech-nological process or manufactured product.
The concept of the new method for environmental assess-ment of cleaner production technologies enabling overall eval-uation of environmental hazards related to implementation oftechnological processes and impact of manufactured product ispresented in this paper.
2. Assumption of the method for environmentalassessment of cleaner production technologies
The proposed method for environmental assessment ofcleaner production technologies consists of evaluations of en-vironmental hazards while enabling quantitative analysis ofenvironmental loading expressed by material and energy flowsexchanged between the technological processes under investi-gation (including manufactured product) and the environment.The technological process is considered as a sequence of unitprocesses and operations required to manufacture the productunder consideration.
The method is based on analysis of materials and energyflows and uses a set of profile indices describing quantitatively,all materials and energy flows related to the analysed technol-ogy. A flow chart of such technological process including pro-files of analysed material and energy flows is presented inFig. 1.
To avoid any incorrect results of assessment, when prepar-ing the materials and energy characteristics (input andoutput balance), the materials and energy flows should
(raw material profile)
Energy Flows(energy profile)
Waste Flows(waste profile)
Product Flows(product profile)
Packaging Used(packaging profile)
T. Fija1 / Journal of Cleaner PFig. 1. Material and energy flows included into analysis of technological
processes.not be expressed in absolute quantities and must be referredto the production volume in the analysed period. Thisprevents false conclusions to be drawn related, for instance,to considerable improvement in the environment, while de-creasing the production volume and reducing the pollutionlevel.
When preparing the environmental characteristics for thetechnology under investigation the following items weretaken into account (according to the flow chart presented inFig. 1):
e raw material profile;e energy profile;e waste profile;e product profile;e packaging profile.
The raw material profile comprises raw material character-istics, including quantitative data related to all raw materialflows (primary raw materials, auxiliary raw materials, materi-als) assigned to the technology under consideration.
The energy profile contains an energy assessment, includ-ing quantitative data related to consumption of all powerraw material flows (solid, liquid and gaseous fuels) and anykind of energy (heat, electricity) used in the process.
The waste profile consists of the characteristics of wastegeneration by the technology, including quantitative data relat-ed to all waste flows (solid, liquid and gaseous wastes) gener-ated in the process.
The product profile contains an environmental assessmentof products, including quantitative data related to productflows of adverse environmental impacts resulting from thetechnological process.
The packaging profile comprises environmental character-istics of packaging materials used in the technological process,including quantitative data related to any kind of packaging,while considering its negative environmental impact.
In each profile the analysed technology is described withprofile unit indices that determine the quantity of individualmass and energy flows per unit mass of manufactured products.
3. Profile unit indices
3.1. Raw material unit index
In raw material profile the raw material unit index (Ws), de-fined in Table 1, is used.
Index Ws includes all raw materials involved in the techno-logical process (except for energy raw materials and raw ma-terials recovered by recycling), including primary rawmaterials, auxiliary materials and water used for technologicalor cooling purposes.
3.2. Energy unit index
915roduction 15 (2007) 914e919In energy profile the energy unit index (We), defined inTable 2, is used. Index We includes total consumption of direct
renergy (directly used in the technological process), being thesum of primary energy (fuel energy) and derivative energy(processed) e electricity and heat. The consumption of all en-ergy raw materials (solid, liquid and gaseous fuels) related tothe technological process as well as electric power and heatenergy used in the process is expressed in weight of standardfuel from the following formula:
1 t:p:u: 1Mt hard coalQw 29;3076MJ=kg; 1
t.p.u. e ton of standard fuel,Mt e metric ton 1000 kg,Qw e calorific value of hard coal (standard fuel).
The total consumption of energy (heat, electricity) used inthe technological process to manufacture product flows e ex-pressed in weight of standard fuel e is reduced by amount ofsecondary energy (wew), recovered and used in the process.
3.3. Waste generation unit index
In waste profile the waste generation unit index (Wo), in-cluding all types of wastes generated in the technological pro-cess, is defined in Table 3.
Gaseous wastes include all dust and gas pollutants emittedinto the atmosphere containing dusts and gases such as: SO2,
Set of formulas and factors taken into account when computing the raw mate-
rial unit index
Raw material unit index (Ws)
wsi e partial raw material unit index for i-th primary raw mate