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thanks kenlach

kenvlach Could you help me remember to estimate quantitties of HCl needed to neutralize? The concern we have with HCl is hazardous gas.

Thanks Saxon

By the way, we are looking for a simple approach that avoids acids such as sulfuric, addition. Flows are 500 gpd and 50,000 gpd

The wastewater has alkalinity of 150 - 300 ppm as CaCO3 and is alkaline due to passing thru limestone filter

Has anyone any experience with neutralizing alkaline wastewaters of 11 - 12 pH for low flows with carbon dioxide or other acidifying techniques?

There is no need for a standpipe. The hydraulic analysis should tell you what to do. The line will probably change form gravity to pressure during pump on - off cycles, so adequate flushing velocities need to be maintained periodically - should not be an issue. We have engineered systems that...