NOVELTY - A fiber glass reinforced plastic (FRP) biogas pool includes: a FRP upper pool (3) fixed onto a lower pool (4) and the two pools form an airtight chamber. The upper pool is provided with a gas vent (2); a feeding passage (1) that extends into the bottom of the lower pool through upper pool; a push rod (11) mounted in the feeding passage; a discharge passage (10) set at the bottom of side wall of the lower pool; and a pressure gauge (13) mounted on surface of the upper pool. The pressure gauge is provided with alarm device.    USE - As fiber glass reinforced plastic (FRP) biogas pool (claimed).    ADVANTAGE - The fiber glass reinforced plastic (FRP) biogas pool has simple structure, is light weight, has high aging resistance, high corrosion resistance, convenient feeding and discharge, and long service life; and has automatic alarm and automatic feeding functions. The feeding passage is set in the upper pool and a push rod is mounted in the passage, such that the feeding is convenient and thorough, and maintenance is convenient. The discharge passage is set at the bottom of side wall of the lower pool, which make easy to clean the lower pool, and the discharge is also very convenient. The audible and visual alarm facilitates instant handling, which can effectively avoid explosive disruption of the pool due to excessively high pressure inside the pool.    DETAILED DESCRIPTION - A fiber glass reinforced plastic (FRP) biogas pool includes: a FRP upper pool (3) fixed to a lower pool (4), and the two pools form an airtight chamber. The upper pool is provided with a gas vent (2); a feeding passage (1) that extends into the bottom of the lower pool through the upper pool; a push rod (11), mounted in the feeding passage; a discharge passage (10) set at the bottom of side wall of the lower pool; and a pressure gauge (13) mounted on the surface of the upper pool. The pressure gauge is provided with an alarm device. The biogas pool includes a motor (16), a connecting belt, a supporting frame (18) and a control circuit.    DESCRIPTION OF DRAWING(S) - The figure shows the structural schematic diagram of the FRP biogas pool.    Feeding passage (1)    Gas vent (2)    Upper pool (3)    Lower pool (4)    Discharge passage (10)    Push rod (11)    Pressure gauge (13)    Motor (16)    Supporting frame (18)