Is Non-Thermal Plasma Appropriate as Odor Control Treatment for Sewage Treatment Plants?

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I have seen suppliers offering NTP as a treatment solution for odor control at sewage treatment plants (STPs). Are they really effective and more cost effective as claimed vs. traditional technologies such as biofilters and scrubbers? 

How can one evaluate objectively if one product is better than another brand? Are there industry standards for this product type? Thanks