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Additional testing is dicsused in the next section on the Clarifier, under the Waste Activated <br /> Sludge heading. <br /> 3.6.3b Aeration Emergency Operations: The following occurrences can cause the biological <br /> process in the aeration tank to fail. <br /> • Lack of air to the tank (blower(s) off or non-operational) <br /> Always maintain a back-up blower and keep up on the maintenance of the aeration <br /> piping. <br /> • Power out and generator not operational: Operator should put a standby generator into <br /> operation as soon as possible. <br /> • MLSS has gotten to high at say>5,000 mg/I (increase wasting/decrease aeration) <br /> • MLSS has gotten to low< 2,000 mg/I (decrease wasting/increase aeration) <br /> • Dissolved Oxygen levels are too low in the aeration tank (increase aeration/wasting) <br /> • Dissolved Oxygen levels are too high in the aeration tank (decrease aeration/wasting) <br /> l - <br /> f <br /> 1 <br /> I <br /> i <br /> 4 <br /> i <br /> .i <br /> i <br /> i <br /> -r <br /> t <br /> Q <br /> ' I <br /> .'r <br /> Aeration Process with Failed Blower Piping <br /> 3.6.3c Aeration Key Notes <br /> The picture above depicts what happens if the aeration/blower system fails. The biological <br /> system essentially dies.The system above was without aeration for about 18-hours.The effluent <br /> did not meet the permit requirements, and it took many weeks to get the system operational <br /> again. Again, always ensure there is a backup blower and the ability to secure a backup <br /> generator with-in a couple of hours of losing power, piping, aeriation, or blowers. <br />