Nano Oxidation Trial Results

Nano Oxidation found to be unsatisfactory for cleaning up larger streams of polluted water bodies but has shown good results in samples drawn from effluent-polluted water. So, it can be used by industries for vehicle washing, re-flushing and gardening  

The Goa State Pollution Control Board (GSPCB) has found the nano-oxidation technology, which promises to treat any kind of water for all pollutants, to be unsatisfactory for using it to clean up larger streams of polluted water bodies like the St Inez creek.

During the lab trials conducted using the nano-oxidation process on contaminated water considering all the parameters, the scientific team of the GSPCB found the result unsatisfactory.

Speaking to this daily, chairman of GSPCB Jose Manuel Noronha said, “With the results not fully satisfactory, the Board cannot go ahead using such a method for larger streams of water for which we would require more testing to gather more details. However, it is recommendatory for industries to adopt such technology in their effluent treatment plants and for hotels in their sewage treatment plants.”

The technology was offered by Ozo Nano Sciences, a Bangalore-based firm, which approached the GSPCB last month with the proposal to clean up the polluted St Inez creek water. The company claims to remove toxic or non-degradable material from water. It also claims the removal of pesticides, petroleum ingredient and VOCs (volatile organic chemicals) by just adding liquid incinerator into the polluted water that also neutralises bacteria, reduces chemical toxicity and precipitate heavy metals.

The GSPCB scientists tested several samples of contaminated water from various sources like industrial effluents and sewage water across Goa to test the efficacy of the technology and its usefulness in water bodies.

The test report revealed the presence of fecal coliform bacteria as well as the levels of BOD (biochemical oxygen demand) and COD (chemical oxygen demand) in the samples collected from the St Inez creek water reduced but not at par as per the prescribed standard. The study report of GSPCB found the level of fecal coliform falling from a range of 24,000 per ml to 130 per ml. The COD content that was supposed to become nil was found to be reduced to 90 mg/l from 160 mg/l. Similarly, BOD was recorded at 51.6 mg/l before treating the water but was reduced to 29 mg/l, which is at the permissible limit of 3 mg/l.

The analysis further indicated that water quality did not meet the desired criteria of various parameters except for the levels of BOD in the samples collected from effluent-polluted water bodies. The BOD reduced from 208 mg/l to 8 mg/l but other parameters like Ph, COD, oil and grease and suspended solid did not show much difference.

“Though it failed to achieve the standard, it has shown good results in samples drawn from effluent-polluted water. So, it can be used by industries for vehicle washing, re-flushing and gardening,” an official said.

Source: The Navhind Times

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Taxonomy

• Treatment
• Effluent
• Purification
• Environment
• Pollution
• Water Management
• Effluent Water