Monday, November 10, 2008

Thanks for your great sense of timing, guys

Recycle sewage 'as a last resort' | The Australian

I don't get this. I don't know exactly when the Queensland government started working on its sewage recycling plan for Brisbane water, but it certainly got a lot of attention when the water levels in the dams got well below 20% (Wivenhoe got to 15%,) and people were losing well established plants and trees in their yards from the dry. No one could say with certainty at what level the remaining dam water might be too hard to treat. There was some speculation that maybe at around 5%, the dams would be effectively empty anyway.

With that situation, I think most people accepted the government reassurances that it was a safe process, and took the use of such water in Singapore as an example of its safety.

Now the dams are up to 40%, and if we have a relatively "normal" summer, that level could well increase over the next few months. But the government still wants to kick start the system and start pumping treated water into Wivenhoe dam in February.

As this was always the plan, (unless dams had got to 100%, I suppose), why is it only now that various scientist types are starting to say that it may not be a good idea after all? And we are hearing that the Singapore experience is not really similar: most of its recycled water goes into industrial use, apparently.

The only obvious reason to start pumping the water into Wivenhoe in February is likely to be so the government can avoid an accusation that it has wasted money on a facility that was not needed. But can't the treated water now be scaled down and somehow diverted into industrial use until we really do need it to ensure a drinking supply?

This is going to be a hot issue for sometime yet, one suspects.

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