PURPOSE:To perform treatment according to an upward flow anaerobic sludge blanket process (UASB), by diluting raw excretion so as to adjust the concns. of ammonia nitrogen and suspended solid contained in said raw excretion to specific values or less before performing methane fermentation treatment. CONSTITUTION:Raw excretion is diluted so that the concn. of ammonia nitrogen contained therein is a...

PURPOSE:To treat sewage according to an upward flow type anaerobic sludge bed process (UASB process), by absorbing carbon dioxide by the outflow liquid from an acid fermentation tank before supplying said outflow liquid to a methane fermentation reactor. CONSTITUTION:Sewage of an excretion system is introduced into an acid fermentation tank 1 from distribution inflow ports 6. Not only acid ferment...

PURPOSE:To treat sewage of an excretion system according to an upward flow type anaerobic sludge bed process (UASB process), by adding hydrochloric acid to the sewage of the excretion system corresponding to the concn. of ammonia nitrogen before introducing water to be treated subjected to acid fermentation into the sewage of the excretion system. CONSTITUTION:In a first stage, the fermentation of...

A brake apparatus has an actuator mechanism for bringing a friction member into tight contact with a braking member to generate a braking force, the actuator mechanism comprising: a main actuating unit for moving the friction member to a position where the friction member is in contact with the braking member; a subactuating unit for further urging the friction member which is in contact with the ...

The invention relates to a display device intended to be inserted into an optical path, including a photoemissive transparent display screen which can be flat and comprises a stack of transparent substrate layers and of transparent electrodes defining the shape of the lettering of the information displayed on the screen. According to another characteristic, the screen can include opaque zones perm...

A reflector antenna with a dish-shaped main reflector (10), and a self-supporting feed (11) for the transmission or reception of polarized electromagnetic waves. The feed (11) consists of a tube (12) which is attached to the middle of the main reflector (10) and is terminated by a subreflector (13) so that an intermediate space (14) is formed between the subreflector and the end of the tube. The p...