Technology
The sewage
treatment method that uses water treatment membrane is called membrane separation
bioreactor (MBR). The MBR started to spread for wastewater recycling in foreign
countries because the quality of water treated by this method is excellent.
However, it consumes two times more energy than the conventional activated
sludge method for treatment. Kubota will start the demonstration operation of a
new plant that reduces energy consumption of the MBR by 40% this year. The
company opened up the way to reduce energy consumption by more than 30% through
the newly developed water treatment membrane with two times more disposal
capacity and control approach that adjusts air supply depending on the
treatment condition. While running the new plant, it plans to decrease energy
consumption by as much as 40% and put it on the sewage and wastewater recycling
market in 2014.
The new
plant is equipped with a water treatment membrane that permeates one ton of
water per square meter daily. Because water permeate flow doubled, the required
number of water treatment membranes halved. Subsequently, this halved the
energy flushing air consumes to eliminate the contamination attached to the
treatment membranes. Ultimately, the company plans to decrease the energy
consumption to a quarter of the present level with the aid of the system to
monitor the contamination of the membranes and adjust the air volume. Kubota is
the world second largest producer of water treatment membranes for the MBR. The
company is strengthening its competitive edge in the energy-saving plant
market. The world wastewater recycling market is estimated to increase 20 times
over the current level to 2 trillion yen in 2025.
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