A citizen group called FOAM (friends of Arcata marsh) developed an integrated wastewater treatment process along with the biologists of Humboldt State University.
The sewage water is treated in an integrated manner by utilizing both artificial and natural processes.
The process occurs in four steps:
•Conventional sedimentation, filtration and treatments with chlorine are carried out.
•Next, an innovative approach is taken to remove dangerous pollutants like dissolved metals.
•A series of six connected marshes is developed across 60 hectares of marshland.
•Lastly, certain plants, algae, fungi and bacteria are seeded into the marshland to neutralize and absorb the pollutants.
Thus, as the water flows through the marshes, it gets purified naturally.
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