Nowadays, people's awareness of environmental protection is increasing, our country has begun to clean up the garbage, many cities also put forward requirements for the catering industry, especially catering wastewater, which must be separated from the oil and water before discharging into the city sewage. pipes, otherwise it contains a lot of oil. Wastewater treatment is very difficult in China, so many catering businesses have now started to install rubber impellers, which is a mandatory national requirement. However, after installing rubber impellers, many catering companies have reported uneven oil treatment. Today, we will look at how to determine the quality of a rubber impeller.? 1. Check if the oil is clean. Different brands and models of rubber impellers are available in the market and are flooded with advertisements. Since restaurant wastewater contains a lot of waste oil, it is a recyclable resource that can be refined into biodiesel after recycling. Therefore, a good rubber impeller must be able to quickly recover animal and vegetable oils from wastewater and the collection must be clean. When purchasing a rubber impeller, experiments must be conducted to prepare some restaurant wastewater for discharge into the rubber impeller. If the wastewater is discharged without oil, the rubber impeller works well. If the catering wastewater flows through the rubber impeller but no oil is collected at all, it proves that the device is a lie and cannot collect animal or vegetable oil at all. Next, check to see if the wastewater meets standards. After treating catering wastewater with rubber impellers, we must bring the wastewater to a laboratory to check whether the oil content meets the state-licensed discharge standards. Many heads of environmental protection departments have repeatedly emphasized that the water must be clean and meet standards before it can be discharged into urban rivers. Restaurant wastewater that meets the standards can only be discharged into city sewers. Otherwise, it will violate national laws and regulations and be punished. Currently, the rubber impeller technology on the market can quickly separate oil and water, and also reduce the rapid coagulation of oil and grease in wastewater. The oil recovery rate can reach 5%-10%, and the oil content of the final discharged wastewater is no more than 5%, which is very effective. Above are some methods to judge the quality of rubber impeller. If you buy or install rubber impeller, please remember to conduct experiments to ensure that you can buy qualified products.