Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Study on automatic control of dechlorination agent dosage for wastewater treatment
The dechlorination effect of sodium thiosulfate and the DCM model for wastewater dechlorination were investigated in order to achieve the automatic control of the dosage of dechlorination agent. Meanwhile，the model calibration was carried out by the nonlinear fitting. The automatic control system of the dosage of dechlorination agent was also developed. The results showed that sodium thiosulfate could be used for dechlorination in the influent of a waste water treatment plant （WWTP），and 90% of residual chlorine in the sewage could be removed within one minute of the dechlorination reaction. The dichlorination efficiencies were mainly determined by the dosage of sodium thiosulfate. The DCM model could be described by CtC0=k21+k1CR+k3. The DCM model curves had a good correlation with the test data. The square values of the fitting correlation coefficients were greater than 0.99，and the residual sums of square were less than 0.000 5. The imitative effect of the DCM model was best while the dechlorination time was one minute. Meanwhile，according to the DCM model，the automatic control of the dosage of dechlorination agent was described with programmable logic controller（PLC） as the main controller，with the on-line monitoring instrument of residual chlorine as the measuring element and with diaphragm pump as the executive equipment. The dosing point was set at the water-collecting well of influent pump station of the WWTP. The residual chlorine values of the influent in biological treatment unit were used for real-time feedback to determine whether the automatic control system of wastewater dechlorination was running correctly or not.
Study on automatic control of dechlorination agent dosage for wastewater treatment
The dechlorination effect of sodium thiosulfate and the DCM model for wastewater dechlorination were investigated in order to achieve the automatic control of the dosage of dechlorination agent. Meanwhile，the model calibration was carried out by the nonlinear fitting. The automatic control system of the dosage of dechlorination agent was also developed. The results showed that sodium thiosulfate could be used for dechlorination in the influent of a waste water treatment plant （WWTP），and 90% of residual chlorine in the sewage could be removed within one minute of the dechlorination reaction. The dichlorination efficiencies were mainly determined by the dosage of sodium thiosulfate. The DCM model could be described by CtC0=k21+k1CR+k3. The DCM model curves had a good correlation with the test data. The square values of the fitting correlation coefficients were greater than 0.99，and the residual sums of square were less than 0.000 5. The imitative effect of the DCM model was best while the dechlorination time was one minute. Meanwhile，according to the DCM model，the automatic control of the dosage of dechlorination agent was described with programmable logic controller（PLC） as the main controller，with the on-line monitoring instrument of residual chlorine as the measuring element and with diaphragm pump as the executive equipment. The dosing point was set at the water-collecting well of influent pump station of the WWTP. The residual chlorine values of the influent in biological treatment unit were used for real-time feedback to determine whether the automatic control system of wastewater dechlorination was running correctly or not.
Study on automatic control of dechlorination agent dosage for wastewater treatment
LI Zhenhua (Autor:in)
2024
Aufsatz (Zeitschrift)
Elektronische Ressource
Unbekannt
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