In the original sewage mixed with many large volume of debris, such as: plastic bags, such as leaves, easily forming apparatus of infarction, the traditional filtering method can minimize debris, but not completely isolated.

Touch covers an area of, liquidation, debris transport and the surrounding environmental pollution, even the most simple water treatment process, its disposal costs will greatly higher than the pump from the water heating and cooling of the value, and in water disposal technology also covering problem. This gave the city sewage source heat pump has destroyed disaster, is also the skill development problems delayed locations.

Thus, bad water quality on the heat treatment equipment and pipeline jam and pollution problems and the traditional sense of the water disposal is not feasible. Because the original sewage water quality characteristics, and the other water source heat pump technology is more the two characteristics, but also the system key technology.