SR0084912_LIQUID WASTE PLAN CHECK

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Pressure gauge Pump Buffer chamber Mass flow meter Valve Figure 1 8.2 Testing conditions, hydraulic loading and schedules 8.2.1 Influent wastewater characteristics Except as required by NSF/ANSI 40 for systems seeking concurrent NSF/ANSI 40 and Nitrogen Reduction certification, the average wastewater characteristics delivered to the system over the course of the testing shall fall within: - BOD5: 100 to 300 mg/L - TSS: 100 to 350 mg/L - TKN: 35 to 70 mg/L as N - alkalinity: > 175 mg/L as CaCO3 (alkalinity may be adjusted if inadequate) - temperature: 10 to 30 °C (50 to 86 °F) - pH: 6.5to9SU Unless requested by the manufacturer, the raw influent shall be supplemented with sodium bicarbonate if the wastewater is found to be deficient in alkalinity. In addition, the influent shall be supplemented with urea to meet the required influent TKN concentration. The influent may also be supplemented with methanol to maintain a carbon:nitrogen ratio of no less than 5:1. NOTE— For this testing, minimum alkalinity may be calculated as described in Annex A. If the influent temperature drops below 10°C(50°F), impacting the nitrification process,sample collection may be suspended until the influent temperature returns to 10°C (50°F). 8.2.2 Hydraulic loading The performance of the system shall be evaluated for a minimum of 26 wks. During the testing and evaluation period, the system shall be subjected to 16 wks of design loading, followed by 7.5 wks (52 d) of stress loading, and an additional period of design loading to obtain a minimum of 55 influent and effluent data sets collected during non-stress dosing period. 8.2.2.1 Design loading The system shall be dosed 7 d/wk with a wastewater volume equivalent to the daily hydraulic capacity of the 15/10/055/0030 This report may not be reproduced in whole or in part Page 28 of 64 Final Nitrogen Report without the expressed written consent of NSF International June 2019