Looking for consultants to rectify bad smell from STP

Hello,We have 100+ apartments in 4 blocks. We have our STP unit in the basement which is partially functioning. We get bad smell in our basement area and other places. We are looking for consultants who can provide solutions to our problems 1. Stop bad smell in basement and other area. 2. Improve treated water usage 3. Sludge machine Thanks, Ashish
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