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ADVANTEX• O&M MANUAL. <br /> • Check to ensure retire ratio isdt too high <br /> • Check to see if influent flows are below normal <br /> • If influent flows are below normal or retire <br /> ratio is too high,reduce recirc ratio <br /> Troubleshooting Biotube• Filter : <br /> Clogging <br /> If a visual inspection of the Biotube•filter for <br /> biomass build-up shows the need for cleaning ' <br /> more often than once every 1-2 years(which <br /> is typical for recirculating systems),try the <br /> following- If the system user cant identify the probable <br /> source,try the following: <br /> • Verify the pump isnt running too long <br /> (typically 3 cycles/hour) • Sample/test effluent for BODS and Grease <br /> • Ensure the retire ratio isn't too high &Oil <br /> • Sample/test at all process steps, including <br /> • Verify normal DO levels;if high,reduce influent(if possible) <br /> retire ratio <br /> • Label, date,and photograph all samples <br /> • Check for below normal influent flows <br /> • Use standard glass beakers and set samples in <br /> • Check influent Grease&Oil and TSS;if front of a common,uniform background, <br /> excessive,a review of component sizes may <br /> be required when photographing <br /> • Check biomat accumulation at AdvanTee <br /> Filter <br /> " - • Note if biomat is yellowish and wax-like or <br /> lard-like.If so,scrape biomat sample for <br /> analysis: <br /> —Photograph/document biomat sample <br /> —Send to lab with effluent samples <br /> Note:Excessive Grease&Oil(>25 mg/L)is <br /> typically a design and management concern <br /> with commercial applications. <br /> Troubleshooting Foam <br /> Troubleshooting Oily Film <br /> Foam indicates that microbes are producing <br /> All signs of oil or grease anywhere in the system excessive gas byproducts.Foam rarely occurs in <br /> (in the tank,in the vault,on the effluent or tex- packed bed filters(and AdvanTex•is a packed <br /> tile filter)must be investigated.Ask the system bed filter).If foam is present: <br /> user to identify the probable source: <br /> - • Verify the pump isn't running too long <br /> • Recent change of car oil? • Ensure the retire ratio iset too high <br /> • Canning meat or poultry? . Ask residents about detergent use <br /> • Excessive use of garbage disposal? <br /> • Excessive use of bath or mineral oils? <br /> Ute•tub?) <br /> • Excessive use of detergents? <br />