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Technical Description Complete control of the entire process can be based upon the SSV-30 and -60 tests. When the sludge flocculates well and settles rapidly, the 7-H TC2K Computerized Monitoring and Control System through process monitoring probes will allow for automatic sequencing of the batch cycle based upon current biomass conditions within the treatment plant. This change can increase or decrease aeration detention and the subsequent clarifier cycle surface settling rate. The clarifier has a dual-weir system for removal and return of floatables to aeration. The weir sys- tem is sized using hydraulic return/surface area (square feet). One hundred percent of all weir wastewater is returned to aeration and thus is contained within the internal detention time of the treatment process. Provisions are made to ensure that any residual floatable scum is not trans- ferred into any downstream process by SNT pump elevation control. FLOW EQUALIZATION Widely fluctuating influent flow rates are typical at nearly all wastewater treatment plants. This fluctuation can result in a loss of treatment efficiency. With higher degrees of treatment constantly being required, some method of flow equalization is a design necessity. The objective of flow equalization is to level of the daily flow variations in order to achieve a con- stant, batched flow rate at the downstream treatment process steps. This is accomplished by stor- ing influent which is in excess of the daily flow-rate average, and then discharging it to the system when the influent flow rate is less than that average. By achieving this objective, overall treatment plant efficiency is dramatically improved. Several methods are available for determining equalization volume; all require generating a daily flow pattern record. If possible, this should be based upon actual plant data. If actual flow data are not available, which is frequently the case, existing communities, developments, institutions, etc., with similar flow characteristics should be studied. Design example: A. Equalization tank for 0.05-MGD plant (50,000 gpd) B. Average hourly flow (ABF) 0.05 x 1,000,000 = 2,083 GPH 24 C. ABF percentage for consecutive periods of the typical 24-hour day are as follows: TIME PERIOD % of AHF 0001-0300 10% 0300-0600 20% 0600-0900 70% 0900-1200 250% 1200-1500 150% 1500-1800 100% 1800-2100 150% 2100-0000 50% D. All flows exceeding average hourly flows must be stored. Tabulate excess flows as fol- lows: PERIODS Less Sum of 14