Con­cern over wa­ter plant

Kapi-Mana News - - OPINION -

I write con­cern­ing the story (Oc­to­ber 28) about the pro­posed Porirua waste­water plant up­grade.

What is be­ing pro­posed will not work, be­cause the plant can­not take more than 800 litres per sec­ond go­ing through the mil­lis­creens.

If this fig­ure is ex­ceeded, the plant goes into by-pass and the ex­tra goes past the plant, down past the UV plant and into the sea at Old Mans Point.

This is un­treated sewage. A new clar­i­fier was added three years ago, and a fourth one will make no dif­fer­ence what­so­ever.

What is ur­gently needed is more mil­lis­creens to cope with the big­ger in­flows from a large pop­u­la­tion ex­plo­sion.

Clar­i­fiers only help to stop treated sewage dis­charges. Even heavy rain can put more than 800 litres per sec­ond through the plant, which hap­pened quite fre­quently when I was there.

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