Oyster Shells for Waste Water Treatment

by OldSailor on March 17, 2009


Oyster shells can be used as an ideal medium for the purification of sewage water. Eiwa Land Environment Co., Ltd. of Japan has demonstrated this in oyster their “AquaMake” waste water recycling system using Oyster shells. The company is also planning to sell this water-saving toilet unit for use in dry areas in Australia, China and the United States.

Some of the interesting reasons to consider Oyster shells as an ideal, high-capacity medium for sewage water treatment are:

  • Oyster shells have a high settlement rate for microorganisms due to their large surface area.
  • Oyster shells have a complex and intricate composition giving protozoa and other microorganisms ample space to thrive.
  • Oyster shells offer higher affinity for microorganisms compared with conventional plastic contact medium.
  • When the pH level decreases as the oxidation treatment progresses, the oyster shells naturally dissolve to adjust the pH level.

Here is the system outline of AquaMake, using Oyster shells for waste water treatment.


For more details, log on to Aquamake System.

Post in MarineBuzz on this day a year before:

How Marine Electrical Equipment are Rated for Ingress Protection

Australians Successfully Locate HMAS Sydney II Sunk during World War II

Did you enjoy this article? Please subscribe to RSS Feed to receive all the updates!

Related Posts:

  • No related posts found

{ 1 comment… read it below or add one }

Cindy Rose Diabordo October 12, 2012 at 4:34 AM

Is the oyster used here is alive or the oyster shell alone processed such as powdered or granulated?

Leave a Comment

Previous post:

Next post: