Cost-effective, chemical-free biological sewage treatment for marine applications
Picture 1: Evac EcoTreat is a 100% biological system for the efficient treatment of black and gray wastewater.Operating principle Evac EcoTreat uses the submerged fixed-film bacteria principle. Black and gray water waste streams are fed to the inlet mixing tank either by gravity or by a vacuum pump. From there, the wastewater is transferred to the bioreactor tank by a macerating pump, which mixes gray and black water and cuts up solids. The wastewater is then driven through the matrix in the bioreactor tank by compressed air that is supplied by diffusers in the bottom of the tank. The air supplies oxygen and also enhances the biological process. The treated water flows from the bioreactor tank into the settling tank by gravity, where it passes through the settling matrix. Before being transferred to the clean water tank, the water is exposed to an advanced UV light filter to eradicate all heat-resistant coli bacteria. Any organic or mineral sludge that accumulates in the settling tank is transferred back to the bioreactor tank for further treatment or removal from the system. Meeting and exceeding the latest standards Evac EcoTreat is type approved and wheel-mark certified by DNV in accordance with IMO MEPC 227(64). Furthermore, the plant is also approved by the U.S. Coastguard and Transport Canada. “We’re delighted to introduce Evac EcoTreat to our extensive range of biological wastewater treatment solutions,” says Mats Riska, Product Manager, Wastewater Treatment Systems at Evac. “This new solution together with our existing advanced wastewater treatment solutions such as Evac EcoOcean MBBR (moving bed biofilm reactor) and Evac MBR (membrane bioreactor) means we can address the various needs of all our customers in the marine sector.”
Picture 2: “We’re delighted to introduce Evac EcoTreat to our extensive range of biological wastewater treatment solutions,” says Mats Riska, Product Manager, Wastewater Treatment Systems at Evac.