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Grencor,pesign <br /> Appendix 4A: Special Considerations for Greywater Treatment Systems (Application Type 6) <br /> Orenco has increased the permissible hydraulic loading rates when using AdvanTex treatment systems for greywater applications—compared to a <br /> standard stage wastewater treatment application—while retaining the organic and nitrogen loading parameters. <br /> Table 4A-1:Standard Advantex Stage Sizing For Greywater <br /> Design Avg Design Max. <br /> Hydraulic Loading Rate(HLR) 40 gpd/ftz * 80 gpd/ft2 <br /> Organic Loading Rate(OLR) 0.04 lbs BODS/ftz/day 0.08 lbs BODS/ftz/day <br /> Total Nitrogen Loading Rate(TNLR) 0.014 lbs TN/ftz/day 0.028 lbs TN/ftz/day <br /> Ammonia Loading Rate(ALR) 0.01 lbs NH3-NM/day 0.02 lbs NH3-N/ft2/day <br /> "This is the maximum rate allowed by Orenco,however local regulation may be more restrictive.Check local regulation. <br /> Determining Influent Constituent Concentrations: <br /> Orenco prefers sampled data to establish influent waste strengths for greywater applications.When sample data is unavailable, NSF350-1 is typi- <br /> cally used to estimate influent constituent concentrations.These concentrations are based upon what is being served and are listed in the tables <br /> below. <br /> Table 4A-2: Expected Range of Greywater Constituents,30-Day Average <br /> Application Type 6A, Application Type 6B, Application Type 6C, <br /> Shower/Bath Only Laundry Only Shower/Bath and Laundry <br /> Parameter <br /> TSS 50-100 mg/L 50-100 mg/L 80-160 mg/L <br /> BODS 100-180 mg/L 220-300 mg/L 130-180 mg/L <br /> Temperature 25-35° C 25-35° C 25-35°C <br /> pH 6.0-7.5 7.0-8.5 6.5-8.0 <br /> Turbidity 30-70 NTU 50-90 NTU 50-100 NTU <br /> Sodium n/a 50-90 mg/L 50-90 mg/L <br /> Total Phosphorous P 1.0-4.0 mg/L <2.0 mg/L 1.0-3.0 mg/L <br /> Total Kjeldahl nitrogen-N 3.0-5.0 mg/L 4.0-6.0 mg/L 3.0-5.0 mg/L <br /> COD 200-400 mg/L 300-500 mg/L 250-400 mg/L <br /> TOC 30-60 mg/L 50-100 mg/L 50-100 mg/L <br /> E.coli 102-103 cfu/100 mL 102-103 cfu/100 mL 102-103 cfu/100 mL <br /> Total coliforms 103-104 cfu/100 mL 103-104 cfu/100 mL 103-104 cfu/100 mL <br /> NDA-ATX-1 Orenco Systems"•800-348-9843•+1 541-459-4449•www.orenco.com <br /> Rev.8,©10/20 <br /> Page 38 of 38 <br />