You need JavaScript to view this

Utilization of internal purification rejects; Sisaeisen puhdistuksen rejektikonsentraattien kelvollistaminen - KLT 02

Abstract

This was a preliminary study which is part of a larger programme. The aim of the programme is to determine the properties and process ability of the concentrates which come from the internal purification of waters from the papermaking process. It is very important to know the properties and process ability of these purification concentrates in order to find the best methods of separating, reprocessing and utilizing them. The objective of this preliminary study was to ascertain the basic properties of these internal purification concentrates. It was also of interest to analyse the properties of papermaking waters and the state of internal purification today in paper mills. The state of papermaking waters and their internal purification were clarified by a literature review and by analyses of different types of waters. It was found that in mechanical pulping organic dissolved and colloidal substances were present in the water. Also there was a lot of dissolved and colloidal substances in waters from machines producing wood-containing paper grades. The salt content and chemical oxygen demand are critical values concerning the reuse of circulation waters. In mechanical pulping the convection of dissolved and colloidal substances to the paper machine can be reduced by the  More>>
Publication Date:
Dec 31, 1998
Product Type:
Technical Report
Report Number:
NEI-FI-362
Reference Number:
SCA: 320303; 320305; PA: FI-99:003408; SN: 99002156346
Resource Relation:
Other Information: PBD: 1998; Related Information: Is Part Of CACTUS technology programme. Yearbook 1998; Alakangas, E. [ed.]; PB: 300 p.
Subject:
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; PAPER INDUSTRY; PAPER; PRODUCTION; WASTE WATER; PURIFICATION; FILTRATION; MEMBRANES; COLLOIDS; CLOSED-CYCLE SYSTEMS; CIRCULATING SYSTEMS; INDUSTRIAL WASTES
OSTI ID:
703410
Research Organizations:
VTT Energy, Jyvaeskylae (Finland)
Country of Origin:
Finland
Language:
Finnish
Other Identifying Numbers:
Other: ON: DE99771568; TRN: FI9903408
Availability:
OSTI as DE99771568
Submitting Site:
FI
Size:
pp. 277-293
Announcement Date:
Jan 25, 2004

Citation Formats

Manner, H, and Nissen, M. Utilization of internal purification rejects; Sisaeisen puhdistuksen rejektikonsentraattien kelvollistaminen - KLT 02. Finland: N. p., 1998. Web.
Manner, H, & Nissen, M. Utilization of internal purification rejects; Sisaeisen puhdistuksen rejektikonsentraattien kelvollistaminen - KLT 02. Finland.
Manner, H, and Nissen, M. 1998. "Utilization of internal purification rejects; Sisaeisen puhdistuksen rejektikonsentraattien kelvollistaminen - KLT 02." Finland.
@misc{etde_703410,
title = {Utilization of internal purification rejects; Sisaeisen puhdistuksen rejektikonsentraattien kelvollistaminen - KLT 02}
author = {Manner, H, and Nissen, M}
abstractNote = {This was a preliminary study which is part of a larger programme. The aim of the programme is to determine the properties and process ability of the concentrates which come from the internal purification of waters from the papermaking process. It is very important to know the properties and process ability of these purification concentrates in order to find the best methods of separating, reprocessing and utilizing them. The objective of this preliminary study was to ascertain the basic properties of these internal purification concentrates. It was also of interest to analyse the properties of papermaking waters and the state of internal purification today in paper mills. The state of papermaking waters and their internal purification were clarified by a literature review and by analyses of different types of waters. It was found that in mechanical pulping organic dissolved and colloidal substances were present in the water. Also there was a lot of dissolved and colloidal substances in waters from machines producing wood-containing paper grades. The salt content and chemical oxygen demand are critical values concerning the reuse of circulation waters. In mechanical pulping the convection of dissolved and colloidal substances to the paper machine can be reduced by the washing stage. Thus, the amount of dissolved and colloidal substances in the paper machine circulation waters can be reduced. In a paper machine, a disk filter removes fibers and fines from the circulation waters, but dissolved and colloidal substances are not removed. Also the properties of different kind of membrane filtration concentrates were analyzed. The total residue of membrane concentrates is low. For example, they can not be burned purely. The chemical oxygen demand of membrane concentrates is high. The most important subjects for further investigation are the improvement of fractionation and condensability. Furthermore procedures must be found to lower the chemical oxygen demand. One promising way to achieve this could by using wet oxidation. (orig.)}
place = {Finland}
year = {1998}
month = {Dec}
}