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Anonymous Poster

Selection Of Process

11/02/2007 4:38 AM

sir,

The treated effluent are contain TDS= 2500PPm, in this water to further to treated to reuses in the process section of the industry. So, which is the best method to treating for DM plant or RO plant.

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Guru
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#1

Re: selection of process

11/02/2007 4:40 AM

As a one-step process, consider the Membrane Bioreactor for converting effluent into semi-potable water.

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Anonymous Poster
#2
In reply to #1

Re: selection of process

11/02/2007 4:46 AM

for the cost of the MBR and RO plant,

which is the lowest.

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Guru
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#3
In reply to #2

Re: selection of process

11/02/2007 6:40 AM

There cannot be an answer from a forum as so much depends upon local circumstances.

Does 'do nothing' cost nothing?

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Guru
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#4

Re: selection of process

11/02/2007 8:22 AM

Treated effluent at 2500TDS could have a number of uses without further treatment:

  • WF3 - "water for fire fighting" in an emergency fire fighting storage reservoir
  • Flower bed irrigation
  • Water-borne transport
  • Hydraulic accumulator for energy storage facility
  • Toilet flush
  • Dust suppression
  • Plant floor washdown
  • Aquaculture
  • heat transfer fluid, though not in an evaporative cooling tower primary circuit.

In each of these, 1m3 reused is 1m3 not purchased and 1m3 not thrown away. The economics of doing any of the above in comparison with

  • Return it to a watercourse and draw borehole or fresh mains water to replace it
  • Re-use it, or part of, it via a membrane process, be it RO, MBR or similar as a precursor to boiler feedwater
  • Re-use it via a reed bed that removes nutrients and lowers the TDS

need to be determined locally.

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#5

Re: Selection Of Process

11/14/2007 10:13 AM

Dear friend,

Both methodes can be adopted that is first RO and then DM for best results.

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