Traditionally pumps for the transfer of sludges and slurries within the wastewater and process waste industries have relied upon progressive cavity and rotary lobe type pumps. Recent years have seen a move from more traditional pumps to energy efficient diaphragm pumps according to Heath Waring of Energy Pumps.
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机译：传统上，用于在废水和工艺废料行业中转移污泥和泥浆的泵依赖于螺杆泵和旋转叶片式泵。近年来，根据Heath Waring of Energy Pumps的研究，从更传统的泵转向了节能隔膜泵。
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