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ADVANTEX• O&M MANUAL Troubleshooting Tips for Operators: Process Treatment Once you know the typical values for wastewater no water softener backwash is discharging treatment system performance(see pp.6,7, 16, into the processing tank!Water softener back- and ackand 17),you can be proactive and troubleshoot wash can be e:ttrem*high in salts,which can nontypical process indicators,before system disrupt system per&rtnance,especially nitro- performance is affected. gen reduction.'.p t Troubleshooting Effluent Quality If no system abuse is uncgvered,explore the fol- lowing design remedies,in this order. If your effluent samples are cloudy and colorltur- bidity is significantly higher than expected(15 to 1.Expanded tank(e.g.,additional grease/od 30 NTUs),do the following: tank) _ 2.Pretreatment(e.g.,additional aeration) 3 Larger filter area(e.g.,additional module) Troubleshooting Odor Fed If the tank or textile filter Smells like rotten eggs or cabbage: Septic Tank RecirdBlend Filtrate • Check Dissolved Oxygen levels ' • Use a DO meter or Colorimetric Kit, ; • Perform cBOD5 and TSS tests • Note filtrate DO levels,dw are • Check the effluent filter for clogging <2.5 or>6 mg/L • Check to see if the textile filter smells of chem- icals(medication,chlorine,erc.) or has a gran- ular or crusty appearance. (For example,a �'y white crystalline crust could signal that water r softener discharge or industrial strength deter- gents have been flushed into the system.) • Check to see if the recirc ratio is too high or the pump dose time is too long If the effluent cBOD is high and TSS low,a large Filtrate DO that's<2S mg/L indicates ittsuffx- amount o£soluble cBOD has not yet been con- tient oxygen.If the filtrate DO is<2.5 mg/L: sumed.That would likely be because the retire ratio is too low for the influent strength or insuf- • Check filter surface for evidence of clogging ficient start-up time has elapsed.Typical organic • reduction within the fust 24 hours in residential Check to ensure the pump is working systems is about 75%or greater.As the biomat • Check to ensure ventilation is occurring begins to develop,greater reductions in the solu- • Check to ensure the retire ratio isn't too low; ble cBOD will occur(typically within the first increase if too low 7-10 days).With a higher influent strength,the • Check to ensure influent strength isn't too high- soluble cBOD would not be readily removed until the biomat on the media is established. (see AdvanTex Design Criteria) • Check to ensure hydraulic retention time isn't If none of these troubleshooting steps made a dif- too high QY ferencei interview,the user m system abuse,espe- Filtrate;DO chat's>� cially in rea the aof harmful chemicals,sdlvents, mj/L m dk" excessIve or strong cleaning agents.Be stare to check that aeration.If the filtrate DO is>6 mg/L: