Introduction to the characteristics of wastewater: Emulsified wastewater is a common type of wastewater produced in factory production. It is characterized by a wide variety of types, high COD and oil content concentrations, and difficult treatment. In the mechanical manufacturing industry, large amounts of emulsified liquid are used for lubrication and cooling during metal cutting processes. After a period of use, the emulsified liquid turns into wastewater and is discharged. The emulsified liquid mainly contains organic oil and surfactants, which are prepared by diluting emulsified oil with water as needed and adding emulsifiers.
Conventional treatment process for emulsified wastewater: filtration + chemical demulsification + biochemical treatment + RO membrane + evaporation. This process is complex and unstable in operation. If there is a problem in any process step, the effluent will not meet the standards. Therefore, many customers prefer to outsource the treatment of emulsified wastewater, but the outsourcing cost is very high, approximately 4,000 to 8,000 yuan per ton.
After independent research and development and continuous small-scale and pilot-scale tests, Suzhou Rongxuan Environmental Protection has summarized a very stable and cost-controllable treatment process for emulsified wastewater: pretreatment + low-temperature heat pump evaporation. Its advantages are: 1. The treatment process is relatively simple and easy to operate and maintain. 2. The effluent is stable and meets the standards, and the condensate water can be directly reused. 3. The low-temperature heat pump evaporation achieves maximum energy conservation, with a treatment cost of 80 to 120 yuan per ton of water. 4. The equipment operates fully automatically and in a foolproof manner, solving the problem of labor for customers.
Project application: A certain automotive parts customer in Shanghai
Emulsified wastewater volume: 3 tons per day
Previous disposal method: Outsourced treatment
Cost savings for the customer: 3,000,000 yuan per year