NOVELTY - A groove-type fermentation biomass pool comprises a sewage inlet (1), an acidified settling tank (2), a sewage channel (3), a feed tank (5), a biomass pool body (7), a fermenting tank (8), a tank cover (11), and a gas outlet (12); where a stirring tube (14) is arranged in the fermenting tank (8); multiple jet holes are arranged on the stirring tube (14); a movable grid (10) is arranged at the upper part of the biomass pool body (7); and a hydraulic pressure tank (18) and a dreg-discharge tank (15) are arranged at the outer side of the biomass pool body (7).    USE - The groove-type fermentation biomass pool is useful for industrial and commercial applications.    ADVANTAGE - The groove-type fermentation biomass pool can efficiently prevent floating dregs from crusting, limiting pressure, and lowest liquid level. Moreover, it can increase gas producing rate by 15-25% in comparison with the normal groove-type tank. Additionally, it adopts fermentation with various materials and convenient deslagging.    DETAILED DESCRIPTION - A groove-type fermentation biomass pool comprises a sewage inlet (1), an acidified settling tank (2), a sewage channel (3), a feed tank (5), a biomass pool body (7), a fermenting tank (8), a tank cover (11), and a gas outlet (12); where a stirring tube (14) is arranged in the fermenting tank (8); multiple jet holes are arranged on the stirring tube (14); a movable grid (10) is arranged at the upper part of the biomass pool body (7); a hydraulic pressure tank (18) and a dreg-discharge tank (15) are arranged at the outer side of the biomass pool body (7); an overflow port (19) is arranged at the upper part of the hydraulic pressure tank (18) while an overflow tube (17) connected with the fermenting tank (8), is arranged at the lower part; and an automatic dreg-discharge tube (16) is arranged between the dreg-discharge tank (15) and the fermenting tank (8).    DESCRIPTION OF DRAWING(S) - The drawing shows a sectional view of the groove-type fermentation biomass pool.    Sewage inlet (1)    Acidified settling tank (2)    Sewage channel (3)    Feed tank (5)    Biomass pool body (7)    Fermenting tank (8)    Tank cover (11)    Gas outlet (12)