Objective
The pulp and paper industry has a great potential to develop its operation into a
truly ecocyclic production system. A higher degree of system closure of the
pulping process leads to problems due to the accumulation of different substances.
It is therefore necessary to introduce internal separation techniques which clean the
liquid flow in the mill. Another issue of great importance is to solve the water
balance in an reasonable way which means reuse of evaporator condensates. The
overall objective in this project proposal is by new separation techniques find
solutions to 'bottlenecks' earlier identified in closed-loop manufacture of bleached
chemical pulp. The reach the main objective, the project is divided into four parts
with their corresponding objectives :
1. Reuse of condensates from the black liquor evaporation : Condensates from
the black liquor evaporation have to be reused in a closed-loop process. The
smell is a critical parameter in products used in food packages. Bad smell
in process water can be transferred to pulp and paper. Consequently, the
black liquor condensates need further treatment to remove the smell-creating
substances. We intend to develop methods to produce washing water from
condensates for use in the bleach plant when filtrates are recycled.
2. Handling of accumulating inorganic elements : Inorganic non-process
elements, NPE's, will accumulate in a closed-loop process and cause very
severe negative effects such as scale, deposits, high content of inerts in lime
cycle and negative effects in TCF-bleaching. NPE's such as Al, Si, P, Ca,
Ba, Mn, etc can today only be purged in very limited ways or not sufficiently
effective. We suggest a technology which enables these elements to be
purged in a precipitation/separation-step from a flow of acidic or neutral
bleach plant filtrate which would offer an alternative way to solve the water
balance from the mill and at the same time purge accumulated substances.
However, it is not yet known how a high increase of dry solids content in
liquor affects the efficiency of NPE's precipitation and the separation of
precipitate. This will be clarified.
3. Handling of accumulating organic substances : We will develop and compare
two alternative ways to achieve a tight internal closure of a bleaching stage
possible - membrane filtration and biological treatment. Today we know that
this type of integration of a bleaching stage usually result in high chemical
consumptions and a lowered pulp brightness.
4. Process integration of separation technologies : The different separation
technologies studied in this project proposal will affect the water balances
in a closed-loop mill when they are integrated into the process. The main
objective is to study these consequences by mass balance calculations with
simulation programme, e.g. MOPS, PULPSIM or GEMS. Changes in the
water balance, scaling in the evaporation, and build up of organic substance
in the bleach plant are examples of consequences which will be illustrated
by an analysis of the whole process.
Fields of science (EuroSciVoc)
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
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Programme(s)
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Multi-annual funding programmes that define the EU’s priorities for research and innovation.
Topic(s)
Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
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Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
Funding Scheme
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Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
Coordinator
114 86 STOCKHOLM
Sweden
The total costs incurred by this organisation to participate in the project, including direct and indirect costs. This amount is a subset of the overall project budget.