Since the market launch of our first wastewater treatment plant in 1972, we have been one of the pioneers in maritime wastewater purification technology. Our plants achieve top performance in the treatment of wastewater and set standards with regard to simple operation, reliability and ease of maintenance.
We operate our own research and development laboratory near our headquarters in Hollenstedt, Germany, with direct connection to the municipal wastewater system. Here we test our plants for several thousand hours in continuous operation.
The knowledge gained in this way flows into the continuous further development of our current plant series and the new development of future plant generations and technologies. This is why we are among the forerunners in maritime advanced wastewater purification technology.
HERE IS HOW HAMANN ADVANCED WASTEWATER PURIFICATION WORKS:
STAGE 1: MACERATION
First, the waste water from the holding tank is macerated and thus prepared for the subsequent clarification stages.
SAGE 2: DISSOLVED AIR FLOTATION (DAF)
By means of our Dissolved Air Flotation (DAF) technology we separate the suspended solids (TSS) and reduce the chemical (COD) and biological (BOD) oxygen demand. The basic principle of our DAF technology can be observed when opening a bottle of sparkling water: Water can absorb gas under pressure,
which quickly escapes when the pressure is released. In our wastewater treatment systems, the macerated wastewater is saturated with compressed air. By suddenly releasing the pressure we create microbubbles that adhere to suspended solids in the sewage and float them to the top of the flotation tank.
STAGE 3: MOVING BED BIOREACTOR (MBBR; NITRIFIKATION)
Moving Bed Bioreactor (MBBR; Nitrification)In Moving Bed Bioreactors (MBBR), growth bodies for bacteria are kept permanently in motion by blowers in the wastewater to be treated. Bacterial processes metabolize the nitrogen compound and eliminate the carbon compound (Nitrogen, BOD5, COD and TOC).
STAGE 4: MOVING BED BIOREACTOR (MBBR; DENITRIFIKATION)
(OceanCruise systems only)
This second stage of the biological treatment is used in our OceanCruise plants to increase the purification effect.