Why Your ETP Meets Pollution Limits but Still Costs Too Much to Operate
An operator pulls up last month’s lab report. BOD is within the consent limit. COD is fine. TSS is fine. The compliance file is clean, and it has been clean for months. Then the accounts team sends over the electricity bill, the chemical purchase register, and the sludge disposal invoice, and none of them look fine. Power consumption has crept up over the last two quarters. The coagulant drum that used to last three weeks now lasts two. The tanker for sludge removal is coming more often than it used to. Nothing on the compliance side explains any of this. The plant is doing its job. So why is it getting more expensive to run? Direct answer: Meeting your discharge limits only confirms that the treated water leaving your ETP is within the parameters set by your Consent to Operate. It says nothing about whether you’re using the least electricity, chemicals, and manpower needed to get there. A plant can be fully compliant and still be running its blowers longer than necessary, overd...