Hi Nicolas most important ...

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Hi Nicolas most important point what;s the capacity of STP you are talking about. If it's small capacity decentralized plant then using the pumps with crushing devices are the best installed in the equalization tank. I have used such pumps for the capacity of STP 750 m3/day.

But if the plant is high capacity & centralized plant then you have to use Screen & grit removal system with special care of odor generation & emission. For odor control you may use a biological product also but it should contain anaerobic bacteria to control odor because odor generation is strict anaerobic process.