The project is co-financed from the Sectoral Operational Programme – Improvement of the Competitiveness of Enterprises, Action 2.4: Support to undertakings in adaptation of businesses to environment protection requirements.
Arctic Paper Kostrzyn obtained financial means under the sub-action 2.4.2.: Support to businesses in water supply and sewage disposal.
The Implementing Body for this Action is the National Fund for Environment Protection and Water Management.
In 1999, the Company produced 175 thousand tons per year, but already in 2006 the production amounted to 239 thousand tons of paper and in 2007 to 246 thousand tons, whereas production of 350 tons of paper per year is assumed in our plans. Pursuant to above mentioned, the necessity to expand the waste water treatment plant had arisen.
The waste water treatment plant operates according to BAS technology (Biofilm Activated Sludge). The process is divided into two stages. In the first stage, effluents are prepared by living microorganisms, suspended on profiled carriers, which are in a basin in number of more than 4 million pieces, to further treatment. This process runs in the 1st stage reactor and consists in absorption of organic substances, present in effluents, by microorganisms suspended on carriers. In the next stage, there are bacteria of higher rank, which do not require carriers and move freely in the 2nd stage reactor. They form sludge. Effluents from the 2nd stage reactor flow under gravity into a clarifier where clarified water is collected at the top of a basin and discharged into a river. Microorganisms in form of deposit are settling on the bottom and next transferred back to a reactor. Living organisms are multiplying continuously and their excess if form of excess sludge is periodically removed from the system, dewatered and utilized downstream, e.g. by ceramic production plants. To survive, all organisms used in waste water treatment need oxygen, which is supplied to reactors by means of blowers. Apart from oxygen, nutrients, i.e. effluents, nitrogen and phosphorus are required, the last one being added to reactors. Also proper temperature is important, which should be at the level of 33 to 38 oC.
Design capacity of the waste water treatment plant is 640 m3 per hour, which offers the potential for production of 350 thousand tons of paper per year. Thus, it is 100 thousand tons of paper yearly more than presently. At the same time, basins that have been erected must endure 25 years at least. Durability of equipment used in the treatment plant is about 10 – 15 years. It must be also borne in mind that the treatment plant can be modified at any time to increase its capacity. The important thing is also the fact that every change in paper production technology results in change of effluents chemical composition, which in turn influences an increase or reduction of a treatment plant capacity.
Benefits for the environment owed to investment in expansion of the waste water treatment plant
In result of the project implementation, the following benefits for the environment have been obtained:
- Reduction of contaminant concentrations in waste water discharged to a river, in this BOD5 and COD5.
- Reduction of a total SS load discharged with waste water
- The increase of the waste water treatment plant capacity and thus enabling further growth of paper production at Arctic Paper Kostrzyn and Company development.
- Improvement of the borderland rivers condition.
- Reduction of a negative impact on tourist qualities of the area of the Warta River Estuary National Park.