Technical attainment of real-time control system for industrial wastewater management

摘要

Environmental protection is one of the today's most important concerns, therefore, firms are expected to reduce their environmental loads continuously whilst enhancing their productivity. In our study, a procedure was developed to manage the wastewater of a pharmaceutical process. The parameters of the wastewater, which flows into the sewerage system, are generally below the permitted threshold values, but occasionally exceed the limits. To improve this situation, online measuring equipment was deployed to estimate chemical oxygen demand (CODcr) on the basis of the sugar content of an aqueous solution (BRIX) refractometric method. A mathematical model was developed for data processing and a control module was designed for the decisions. The measuring module was tested for 45 d. The data received were used for testing and monitoring the control module. During the test period it was found that the volume of the water requiring transfer for CODcr removal fell by 50%, whilst no water with parameters above the threshold value flowed into the sewerage system.