An apparatus for collecting floating marine debris comprises a frame, a debris collection container in communication with a rear opening of the frame, a pair of helicoidal screws mounted to the frame in a symmetrical V-arrangement that tapers inwardly from a front opening of the frame to the rear opening, and at least one prime mover rotationally coupled to the pair of helicoidal screws. The prime mover is operable to rotate the helicoidal screws in opposite directions at the same angular velocity in water to move the apparatus forward through the water, such that floating marine debris enters the apparatus through the front opening, passes through the rear opening and is collected in the debris collection container.

An apparatus for collecting floating marine debris comprises a frame, a debris collection container in communication with a rear opening of the frame, a pair of helicoidal screws mounted to the frame in a symmetrical V-arrangement that tapers inwardly from a front opening of the frame to the rear opening, and at least one prime mover rotationally coupled to the pair of helicoidal screws. The prime mover is operable to rotate the helicoidal screws in opposite directions at the same angular velocity in water to move the apparatus forward through the water, such that floating marine debris enters the apparatus through the front opening, passes through the rear opening and is collected in the debris collection container.

The invention discloses an automatic maintenance apparatus for cleanliness of river surface, which includes a processing device housing. The processing device housing is provided with a working chamber, and the working chamber is provided with a lifting mechanism. The lifting mechanism can collect garbage on the river surface. In this device, the garbage collected is simply sorted. A conveying mechanism is provided on the right side of the lifting mechanism, and a storage mechanism is provided on the lower side of the conveying mechanism. The storage mechanism includes the trapezoidal block. The storage frame between the right end surface and the right end wall of the working cavity. When there is too much waterweed in the storage frame, the device will stop working. The device is easy to operate, and the two devices are fixed at a certain position on both sides of the hull. Then, turn on the motor and start the boat.