Research on the Method of Soft-sensing Intelligent Compensation for BOD Biosensors in Sewage

PLS (Partial Least-Squares) is adopted to carry on non-linear compensation to the BOD (Biochemical Oxygen Demand) soft-sensing mechanism model on the basis of studying on Lawrence - McCarty formula’s BOD mechanism model. Compared with BOD biosensors adopting different materials and the least squares compensation method, the method has obvious advantages, improves the soft-sensing accuracy of BOD markedly and provides an effective way for the accurate measurement of water quality BOD in the process of waste water disposal.