The EVAC MBR wastewater treatment plant is capable of handling all black (sewage)
and grey waters (from galleys, sinks, showers and laundry).
“We are very proud to be among the first companies, perhaps even the first, to have achieved this type approval certification,“ said Mika Karjalainen, chief operating officer of Evac Oy. “Thanks to our membrane bioreactor technology, where the activated sludge process is combined with the sophisticated membrane separation process, it was not difficult to fulfil these requirements. The Evac MBR also reduces nutrition discharged into the sea according to IMO and HELCOM requirements. With our systems on board, shipowners can look beyond year 2016 with confidence.”
The IMO MEPC.227(64) Resolution enters into force for new ships on 1 January 2016, and on existing ships from January 2018. It takes into account the possibility of diluted water being incorporated into the discharged liquid, when determining the discharge limits for the various pollutants, the requirements are tightened in the same ratio as clean water is added.
Thanks to its cleaning process, based on a membrane bioreactor, EVAC MBR fulfilled the requirements with 'good margins'. Sewage treatment plants shall meet set effluent standards for Thermotolerant Coliforms, Total Suspended Solids (TTS), Biochemical oxygen (BOD5) demand and pH.
Another requirement of IMO MEPC 227(64) is that of limiting the amount of nutrition in the discharged wastewater within the Baltic Sea special area, a requirement strongly promoted by The Helsinki Commission (HELCOM). The new IMO regulations require that the nitrogen and phosphorus content in the treated waste water is reduced to 20mg/l, or at least 70 per cent, and to 1.0mg/l, or at least 80 per cent, respectively. EVAC MBR fulfils these requirements.
In order to receive the type approval certificate (EC-Type Examination Certificate for Sewage Treatment Plants for Ships, acc. Marpol 73/78 Annex IV and Helsinki Convention) for the requirements of IMO’s MEPC 227(64), tests were conducted at the Aachen University Test Laboratories.
Concurrently, the type approval testing for the certificate for operating the Evac MBR system on the Rhein River was also undertaken. This included continuous testing of the MBR system for a period of 30 days.