Water Environment Federation (WEF) Discussion ForumsWater Environment Federation (WEF) Discussion Forumshttp://www.wef.org/TechnicalDiscussions/jfuller@wef.orgSun, 12 Oct 2008 11:14:25 GMT20http://www.wef.org/TechnicalDiscussions/Topic8706-14-1.aspxWe have a anaerobic contact basin used for treating industrial wastewater. We currently have VFAs of 23 and a total alkalinity of 1500 (without NaOH being added). Should I be concerned that the total alkalinity is 1500 (which some think is too low) or should I focus more on the VFA/TA ratio, which is .01 right now? I believe that adding NaOH is not necessary as long as my ratio stays below .1. I am not worried about a sudden increase in influent VFAs due to a large EQ tank ahead of the anaerobic contact basin.</P><P>THANKS!!Fri, 21 Mar 2008 08:35:15 GMTpat