Waste processing (recovery and/or neutralisation) is currently performed in three technologically interconnected installations, each of which can operate independently as well.
Thermal Waste Processing (TOO) Station – installation used for thermal processing hazardous and non-hazardous waste with simultaneous conducting activity in the range of recovery.
characteristics of the installation 1 During thermal waste processing, with high temperature, long period of keeping waste in the incineration zone and controlled air supply, all harmful organic substances are destroyed. Thermal waste processing is conducted in a state of so-called thermal balance (stable temperature, pressure and negative pressure in particular stations). During the incineration process, significant reduction of mass and volume of harmful substances take place which, in consequence, influences the mineralisation of adverse impact on the soil, water and atmospheric air. Combustion gases are also subject to multi-level treatment in order to obtain parameters consistent with standards.
In 2012 in the installation Thermal Waste Processing Station the system of continuous measurement of combustion gases was replaced with one of the most modern ones applied for this type of measurement. The system checks on the measurement of such parameters as: dust, carbon monoxide, sulphur dioxide, nitrogen dioxide, hydrogen chloride, hydrogen fluoride, organic substances, velocity of combustion gas flow, temperature and combustion gas pressure. The system allows for precise control of quality and volume of gases released to the atmosphere.
Maximum theoretical capacity: 20 000 Mg of waste/year
Maximum practical capacity: 16 000 Mg of waste/year
SThe Station of Recovery and Storage of Waste Oils (SOMO) – the installation used to conduct activity in the range of recovery of oils from oil-water mixes for the purpose of their further use as substitute fuel for the installation of Thermal Waste Processing Station or in order to subject them to regeneration.
The technology applied in the SOMO installation consists in separation performed in storage, separation tanks as well as sludge tanks. After gravity seperation the storage tanks still contain oil. Upon demulsifies are added, it will be transferred to two separation tanks where it is heated up with a heating coil (vapour heating). Separated oil with water content up to 10% is pumped to distribution containers from where it can be pumped to road tankers for sale or used as substitute fuel in TOO (Thermal Waste Processing) station installation. Separated, contaminated water is transferred to the installation of Ballast Water Treatment Plant (OWB). Upon treatment, it is stored in the purified water tank and collected from it to be used as process water for TOO Station installation.
Maximum theoretical capacity: 5 000 Mg/year
Water Treatment Plant (OWB) – Ballast the installation intended for treatment of liquid waste created as a result of cleaning separators, storage tanks for petroleum products, sewage from production plants as well as contaminated water coming from technological processes performed in other installations at Port Services site with simultaneous recovery of oils and water used in other installation as process water.
Oiled water is stored for a period of ca. 60 days in two steel containers of total capacity 40,000m³. During storing, oil and suspended solid particles are separated from treated sewage with a gravity method. Oil collects on the surface of the liquid and is periodically removed with ducts installed at different levels, whereas suspended solid particles fall down to the tank floor from where they are removed during tank cleaning.
Upon the process of gravity separation, the treated liquid is transferred to the depurator where mechanical filtration takes place. The depurator is made from a four-level floating machine with four rotors and dispersing mechanisms located in the number of independent goals. Subjecting liquid to processing in the depurator allows for removal of the major part of oil and suspended solid particles included in feeding sewage in the form of foam.
The next stage of processing is flocculation which affects the suspended particles of solid substances and oil parts which cannot be separated by sedimentation. A specially prepared mix of non-organic chemical compounds and polyelectrolyte is used for separation of these micro particles.
The last process to which contaminated liquid is subjected to is pressure floatation. Its aim is to clear discharge water by removing suspended particles of both oil and solid bodies. In order to achieve the intended result, air is fed under increased pressure to water flowing out of the flocculator. This water is next returned to the flocculator. Air is decompressed in the floatation pool at atmospheric pressure. Air isolated from water creates small bubbles which adhere to suspended particles, resulting in their floating on the sewage surface from where they are removed with surface scrapers.
Isolated contamination accumulates in the form of sediment or flows out through an overflow as process foam which is collected in the foam and sludge tank. Sediments are burnt in the incineration plant and purified water from our storage tank is used in the TOO installation as supplementation of the circuit of cooling water as well as to cool waste gases.
In the installation of the OWB Station also rain sewage coming from roofs of the buildings located at the site of the Plant, paved surfaces and waste storing squares as well as washings from cleaning ventilator dry coolers in the TOO Station installation are subject to treatment.
Theoretical capacity (ability to treat oiled waters): 100,000 Mg/year (including sewage from other Stations)
Practical capacity: ca. 60,000 Mg/year