Liquid purification or separation – Structural installation – Geographic
Patent
1985-04-19
1987-02-24
Wyse, Tom
Liquid purification or separation
Structural installation
Geographic
210180, 2105321, 210539, C02F 1104
Patent
active
046455949
ABSTRACT:
An anaerobic digester system for biodegradable materials comprises a closed generally cylindrical digester tank supported with its axis vertical and with the majority of its height below ground. The tank includes a gas collecting region at its top above a predetermined normal liquid level within the tank. Spaced inlet and outlet openings are provided near the bottom of the tank and substantially straight inlet and outlet channels are connected to those openings providing a flow inlet to and a flow outlet from the digester tank, and a deflector surroundes the outlet opening to inhibit direct flow from the inlet to the outlet while allowing digested material to proceed to the flow outlet, and an agitating device is fitted in the tank. An input basin, having a relatively small volume with respect to the tank, is supported with its bottom at the predetermined normal liquid level in the digester tank, and is connected to the inlet channel for gravity flow of material loaded into the input basin under atmospheric pressure into the digester tank. An outlet basin, having a volume no less than said input basin, is located with its top approximately at the same level as the normal liquid level of the digester tank and is connected to the outlet channel. Anaerobically digestable material may be loaded into the input basin and will proceed by gravity and atmospheric pressure into the digester tank, the effluent of digested material will flow into the outlet basin, and gases resulting from the digestion will rise through the material and agitate the same and then proceed to the gas collecting region where the gases can be removed.
REFERENCES:
patent: 4157958 (1979-06-01), Chow
patent: 4256837 (1981-03-01), Fluri et al.
patent: 4323367 (1982-04-01), Ghosh
patent: 4372856 (1983-02-01), Morrison
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