Wastewater grinder can be installed in the inlet channels or wells of the water treatment plant, rainwater or sewage lift stations for intercepting and shredding the solid waste in the water. Besides, it can be used for shredding waste in biogas, environmental sanitation, paper making, and chemical engineering industry pipelines, or be used in rubbish processing industries for shredding rubbishes. It can be also used for shredding the solid waste in the drainage pipes of mall, restaurants, hotels, residential areas, villa, and soon. It guarantees the pipes are unobstructed and ensure equipment in the following process like pumps are under normal operation. It is an advanced waste intercepting and shredding equipment.