Case Study #267
1. Headline: New technology reduces effluent discharges in a
French pulp and paper plant.
2. Background: The AUSSEDAT-REY paper mill took advantage of
a site restructuring to adopt a new technology to decrease
the pollution discharged into the Vienne river. This case
study was carried out in 1994.
3. Cleaner Production Principle: New technology
4. Description of Cleaner Production Application:
Information about the process and wastes
The SPSV company decided to triple its capacity for
producing paper pulp (from 440 to 1100 t/day). A survey of
the Vienne river water quality showed it was necessary to
reduce COD discharges in half. In order to meet this
objective, and despite the increase in production, the
paper mill altered the treatment at the source of
pollution, by means of :
an extended continuous heating process,
washing using a washing press,
an alteration of the bleaching sequences,
the condensates stripping and recycling.
The continuous digester with extended heating ensures
maximum lignin removal. Thus, less lignin is in the
bleaching stages is reduced, leading to a significant
decrease in its derivates contained in the effluents.
Using chlorine dioxide instead of chlorine reduces the
discharges of organo-halogen compounds coming from the
bleaching sequences by a factor of 15.
Using a washing press ensures a decrease in the water
consumption and chemical products. The quantity of
dissolved organic and inorganic matters is reduced by 75 %
at this level.
Material / energy balance and substitution
BEFORE
AFTER
(for 400 t/d of pulp) (for 850 t/d
of pulp)
COD/day 42 t
23 t
SS/day 3.8 t
1.5 t
Flowrate/day 90 000 m3 62000 m3
5. Economics:
Cost of direct investment
Investments 276 000 000 FF (1994)
(Source : Water Agency Loire-Bretagne)
6. Advantages:
Decrease in the water consumption by 30 %.
Decrease in COD contained in the discharges by 50 %.
Contribution to the public image of the company, by means of
its decisive participation in the action plan of the Water
Agency for the Vienne river water quality.
7. Constraints: No information provided.
8. Contacts:
Agence de l'Eau Loire-Bretagne
M. FOURNIER
TEL: 33 38.51.73.73
M. GUIGUET
Responsible for the laboratory
SociÆtÆ des Papeteries de Saillat sur Vienne
(SPSV company)
87701 SAILLAT/VIENNE - France
TEL: 33 55.43.48.00
FAX: 33 55.43.48.40
Journal of the Water Agency Loire-Bretagne
N 53 - June 1994
Chief Editor : M. De Wroczynski
Avenue de Buffon - B.P. 6339
45043 ORLEANS CEDEX 02 - France
TEL: 33 38.51.73.73
FAX: 33 38.51.74.74
M. Maton
M. Chatenet
Office International de l'Eau
Direction de la Formation et des Etudes
rue Edouard Chamberland
87065 Limoges Cedex, France
TEL: 33 55114770
FAX: 33 55777115
9. Keywords: ISIC 3411, pulp and paper, France, new
technology, COD, bleaching, chlorine, water saving
10. This case study was submitted to UNEP IE in 1994 by the
French Office International de l'Eau. It has not undergone
a formal technical review.