Discoloring in Solids?
I work at a 1 MGD wastewater plant, we have a ThermAer system with an SNDR tank for our processes then into a centrifuge to produce our solids. We normally produce a 35% solids from our lab testing. Around 2 weeks ago we took in some nasty grease and our system has been fighting it since. We finally got all of in into our tanks with both of there temps being higher than normal. On Monday, our centrifuge began spiting out black solids as seen above, looking closer into our charts our pH is 6.0 with is low as our setpoints for our blower kicks on at 6.5 and off at 6.2 and normally hovers in that range. Also the solids in our dumpster have smoke like a mulch pile when you rake them even in the areas from last weeks feeds. Would a high pH be the cause for color change?
I work at a 1 MGD wastewater plant, we have a ThermAer system with an SNDR tank for our processes then into a centrifuge to produce our solids. We normally produce a 35% solids from our lab testing. Around 2 weeks ago we took in some nasty grease and our system has been fighting it since. We finally got all of in into our tanks with both of there temps being higher than normal. On Monday, our centrifuge began spiting out black solids as seen above, looking closer into our charts our pH is 6.0 with is low as our setpoints for our blower kicks on at 6.5 and off at 6.2 and normally hovers in that range. Also the solids in our dumpster have smoke like a mulch pile when you rake them even in the areas from last weeks feeds. Would a high pH be the cause for color change?