As Clear as Water
The US company Clearas has developed a biological, algae-based method by which water can be purified for reuse and, at the same time, valuable biomass as a byproduct can be obtained. Photobioreactors that contain glass tubes demonstrate their ability to perform in a test facility.
The view from space clearly shows why our earth is also called the ”blue planet.” 29 percent of the earth’s surface is occupied by land, the greater share (71 %) by the oceans which contain more than 97 percent of the earth’s total water. More than 70 percent of the 2.5 percent fresh water is in frozen form. All living beings on earth, except for marine life, thus share the remaining 0.75 percent of the total water. With the world’s population increasing to currently nearly 7.3 billion and an estimated nine billion in 2050, the world’s water has to be shared among more people. At the same time, in recent decades the proportion of water used for agriculture and for growing food has tripled to 70 percent of the world’s water supply. And industry requires water, amounting to about 22 percent. The remaining eight percent of the world’s water is used by households.
Global need for clean water
According to the UN’s 2015 World Water Report, water efficiency needs to be increased and contamination of water reduced by adopting stricter regulations. “Vision for 2050: Water for a Sustainable World,” also points out that “waste water should be viewed as a resource that provides energy, nutrients and fresh water for reuse.”
Clearas Water Recovery in Missoula, Montana, is a company that pursues this very goal with great commitment. With its patented ”Advanced Biological Nutrient Recovery” (ABNR™) solution, the Clearas team has been offering innovative biological wastewater treatment technology for industrial, municipal and agricultural customers since 2011. Substances such as nitrogen and phosphorus in wastewater pose a particular challenge for these consumers. Other advantages for the user include the fact that the system is modular and if necessary can be connected to an existing water treatment infrastructure as a retrofit system.
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