Cleaner Technology Projects in Denmark 1997
Environmental Management of a Waterworks
Miljørigtig projektering ved renovering af vandværk
Arbejdsrapport nr. 34, 1997, Miljøstyrelsen
The demonstration project, DP16, forms a part of a number of demonstration projects under phase 2 of the outline project Environmental Management in Project Design. The primary result of phase 2 is "Håndbog i miljørigtig projektering" which contains methods, descriptions, guidelines, environmental data and examples. Under the demonstration project the principles of Environmental Management in Project Design have been tested and experience is continuously communicated to the outline project.
The purpose of the present demonstration project is:
 | To test and assist with the further development of the methods for environmental management constructions/plants on a total modernisation of Kasted Waterworks |
| To assist with a specification of the model in guidelines on procedure for the implementation of environmental study and assessment in the planning and programme phase of a construction/plant |
| To test the usage of GIS (Geographical Information System) in connection with Environmental Management in Project Design |
| To incorporate environmental assessments in connection with the operational phase (technical plants, the groundwater resource, water treatment, security etc.) in the project |
| To incorporate exterior environment and working environment at the same level of other essential conditions in connection with the renovation of the waterworks |
Apart from above mentioned experience will be gathered in with the superior mapping of environmental impacts, ranking of environmental impacts, environmental ail, preparation of environmental programme and preparation of an environmental plan for a total renovation of the waterworks.
Especially for this project the assessments are included in connection with the operational phase (technical plants, the groundwater resource, water treatment, security etc.) as an essential part, as this is a technical plant.
The project deals with a total renovation of Kasted Waterworks from the well field to the clean water storage and a possible extension of the elevated storage capacity and consequent possibility of better exploitation of the 3-point tariff.
Kasted Waterworks supplies app. 3.5 million m3 a year, corresponding to app. 15% of the total water consumption in the Municipality of Aarhus. The waterworks was established in 1952 and till now only ordinary maintenance and 2 smaller extension of the filter plant has taken place. A thorough survey of the well field has been undertaken and the maximum pumping capacity is 3.7 million. m3 a year.
The detail led survey of project proposal as well a main project is based on the detailed input-output statements, where the environmental impacts are quantified for each of the possible means.
During the project phases the communication of environmental conditions to the client had a high priority in order to make the client able to evaluate environmental conditions on equal form with financial situation, quality, aesthetics etc.
On the basis of superior inventory of the guidelines in the manual an environmental programme for the project was set up and an environmental plan comprising a time and activity list and a strategy for controlling the environmental effort.
An exact statement of the total reduction of the environmental impact of the project is of course difficult to prepare, but on the basis of the listed means and the purpose of the project the environmental result of the work with Environmental Management in Project Design can be described in text and figures as follows:
Material: Exclusive of the material consumption from the establishment of a new water treatment plant in Ristrup the total material reduction of the project is about 300 tonnes (covering the projects economic life) and apart from the selected membrane all the rest of the material is well known in connection with water treatment.
Energy: A reduction of app. 65 GJ/year (material and operation) of the energy consumption has been attempted. Furthermore the total outlets of C02, S02 and NOx has been reduced with app. 85 tonnes/year over an economic life of 50 years.
Water: A reduction of 67,000 m3/year of the water consumption has been attempted.
Health: In the future the effort is systematically concentrated about reducing the risk of deterioration of the drinking water quality. The project comprises an improvement of the working environment and the indoor climate at the waterworks, reducing the strain caused by heavy lifting, damp and noise.
Furthermore the strain on the external environment has been reduced as:
| The risk of discharge of ochre-containing rinsing water to streams is smaller |
| Construction changes reducing the noise strain in the surroundings have been carried out. |
In the project response to the manual has been prepared within:
| Method - ranking/score, the cyclic sequence, environmental effects and impacts, partners, survey of health effects and the life cycle supply. |
| Help tools - gross lists, legislation, environmental data, GIS (Geographical Information System), application and working environment. |
| Environmental programme/plan - contents. |
Author/ institution
COWI and Århus Kommunale Værker
This report is subsidised by the National Council for Recycling and Cleaner Production
ISSN no. 0908-9195
ISBN no. 87-7810-781-4