Low-consumption sewage treatment equipment and sewage treatment system

The invention provides low-consumption sewage treatment equipment which comprises a membrane area, a fan and a reflux pump, a membrane assembly and an aeration pipeline are arranged in the membrane area, sewage in the membrane area is filtered by the membrane assembly to obtain treated water, and the treated water flows out of the membrane area. The reflux pump is used for pumping sludge in the membrane area into the sewage treatment area before the membrane area through a sludge reflux pipe, the fan is used for introducing air into the sewage treatment tank through an air inlet pipe for aeration. The equipment further comprises a plurality of water ejectors. A sludge branch pipe is arranged on the sludge reflux pipe behind the reflux pump, and the sludge branch pipe is connected with theinlet of the water ejectors. The air inlet pipe is further provided with an air inlet branch pipe, the air inlet branch pipe is connected with the inlet of the water ejectors, the outlet of the waterejectors is connected with