Chlorination Innovation News Feb. 2018
CHANGE FROM BATCH GENERATOR PUMPING TO 3-PRECURSOR VACUUM GENERATOR-FEEDER FOR INTRODUCING PRETREATMENT CLO2 IN WTP CUTS CHEMICAL COSTS, GAINS PLANT MANAGEMENT OF EQUIPMENT
Also Ends Maintenance Burden; Change to be Expanded to Second WTP
The water treatment plants (WTP’s) manager for the city of Midlothian, TX reports significant reduction in chemical costs, gaining new management control for their generation and feed equipment, and ending a pesky maintenance burden, by switching to three-precursor vacuum generator-feed, from batch-generator-pumping, for introducing chlorine dioxide (ClO2) into their 8 MGD plant #2. As a result, he plans to make the same change at their 12 MGD plant #1.
“We were generating our own chlorine dioxide on site,” explained Tim Walker, the WTP’s manager, “and the generator and peristaltic pumping to introduce the chlorine dioxide into our process was through a lease agreement that was part of our purchase of sodium chlorite as a raw material.”
“That agreement said we couldn’t work on the equipment ourselves; only the vendor could. Every couple of months we had to call in their technician to change the hose. But the major issue that emerged was when
I saw the annual cost of the agreement was getting too high. I was glad to hear there was an alternative way that would not only cut our chemical costs, but give us our own control over our equipment, and allow us to not have to continuously check for failing hoses and other problems."