National Science and Technology Development Agency : NSTDA - Thailand

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From Waste to Environmental Research

December 15, 2010

Through the environment cluster management program, NSTDA developed technology to produce porous material which is resistant to low temperature, made from rice husk ash and other waste materials.  This material can be used in diverse industries ie: construction, aquaculture and soil-less planting.  The products from this research include:

  • A porous material for waste water treatment - The product is as porous as 60 percent of its mass with holes from micron-to millimeter-sized.  The holes provide living space for beneficial bacteria that naturally break down the excretions of aquatic animals.
  • Lightweight rocks - The materials are made from foam with the density of only 0.6-1.0 grams and 1-1.3 gram per cubic centimeter.  They can be used in place of natural rocks for decoration or for construction that requires light weight structure.  Due to its non-toxic quality, the rocks are popularly used in aquarium.
  • “Hortimedia” growing material – A very porous water-retentive like coconut husk, perlite or vermiculite, yet more durable.  It is available in several formulae with different water retention qualities for growing various kinds of plants.  The low electrical conductance of less than 0.4 mS/cm, make it suitable for hydroponics or soil-less growing systems.

    The porous material for waste water treatment won the gold medal in the Protection of the Environment & Energy category from the 38th International Exhibition of Inventions held in Geneva, Switzerland.
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