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i Design and Specifications the 600-gallon oversizing effectivelygives the system an internal flow equalization and safety factor of 1,832 gpd. Since the system feed pump is located near the bottom of the 2,000-gallon front-end buffer tank, at least 1,900 gallons of additional volume are available as added flow- equalization capacity. Adding this 1,900 gallons to the above 1,832-gallon safety factor raises the total safety factor to 3,732 gallons, or over 74% of the 24-hour design flow capacity. Bio-Pure systems are designed for unmanned operation. The microprocessor-controlled operation is smooth and error-free and, once programmed, the operation will continue reliably until repro- grammed. There are many Bio-Pure systems which have been in continuous operation for more than 25 years. , Anticipating an average level of state mandated reporting requirements, the system operation, maintenance, and testing should take no more than one hour a day. These services will be per- formed under contract with a state-registered sanitarian. Selected operators and plant owner will receive a minimum of 8 hours' training in Bio-Pure"system theory, maintenance, and operation by AquaClear. During normal sequence of operations, the collection system will deliver the wastewater from the generating facilities to the buffer tank'! From the buffer tank, the wastewater is lifted into the aeration chamber. In the unlikely eventthat the reserve area of the aeration chamber is filled, an override switch will prevent operation of the system feed pump and the influent will collect in the buffer tank for a maximum of 100 minutes. This is the longest period of time a Bio-Pure system operating at maximum flow capacities can stay in idle mode before batching. Float controls are used to start and stop the system feed pump in the buffer tank. Under normal conditions, the major concern would be to set the controls and system timing to prevent wastewa- ter from remaining in the buffer tank in'an anaerobic state for a long period of time. This cannot happen with this system, as the buffer tank is aerated. Under maximum daily flow conditions,.'the system batch sequencing processes a batch from the aeration chamber at least once every 97 minutes, and the fill rate of the total reserve capacity during the twice-daily peak flows is, on average, less than 10.42 gpm. The maximum amount of incoming waste over the 97-minute batching period would total 1,010 gallons; subtracting that from the 3,732-gallon reserve/safety capacity leaves a 2,722-gallon minimum safety capacity during peak flows, thus assuring the system cannot overflow. The digestion process in the aeration chamber is carried out with the introduction of air into the incoming wastewater. The soluble material, oxidized material, settleable solids and suspended solids form a mixed liquor. Aeration chamber mean:cell-residence-time for the digestible material is a minimum of 16 hours and is dependent on the final system timing, which is based on effluent testing. This shorter-than-normal mean.-cell-residence-time is possible due to higher-than-normal temperatures maintained in the aeration chamber. These higher temperatures make the waste more readily digestible by the microorganisms. The temperature is elevated by a combination of three things: the heat dissipation/transfer of the submerged pump, the energy conversion which takes place during the digestion process, and the retention of both of these heat sources by closed tanks. 3