**6.3 Prepared of the sewage treatment plant screen**

This screen displays the different preparations which are going to add to water for physicalchemical treatment of flocculation and coagulation. Fig. 15 shows this treatment

Thus, from this screen is possible to control the levels of the different machines needed to perform the different functions in the purification process, such as the pumps and motors.

Fig. 15. Prepared of Sewage Treatment Plant Screen

#### **6.4 Warnings**

80 Emerging Informatics – Innovative Concepts and Applications

Fig. 12. Menu of Main Screen Sewage Treatment Plant

Fig. 13. Main Screen Sewage Treatment Plant in status operation normal

Fig. 14. Main Screen Sewage Treatment Plant. Powered emergency shutdown

This screen displays warnings and system alarms set up. In both cases, shown in Fig. 16, apart from the source, reflects the date and time.

In the proposed control system, in addition to the specific warnings of the system HMI that reports the state of service, are defined the following:


#### **6.5 Histogram screen**

Fig. 17 shows the two analogue variables, Ph level and temperature, depending on the time, when the system is on, and Fig. 18 shows when the system there is an emergency shutdown.

Expert System Design for Sewage Treatment Plant 83

This work has been carried out using a process of control, supervision and monitoring of a purification plant intended for the wood Industry. It has been initiated to implement an expert system in the total control of the process and has been complemented with a set of records and alarms. This has revealed in real time the operation state of the process, which

The choice of a PLC as a control device, not only has guaranteed the interconnectivity and compatibility of the various equipments through interfaces and protocols, but also has also facilitated the interoperability with the used SCADA implementation. At the same time, there are advantages of allowing using industrial PLC, and especially in this project, it gives flexibility for future upgrades or modifications of the process. The WinCC SCADA with which has been developed the Human-Machine Interface ("HMI") of the system, in addition to its compatibility with the PLC, has helped reduce the processing times of the project due

The reduction of the presence in human staff to a single operator, is not detrimental to the operation of the installation, because the expert system proposed improves the quality of work of the operator and minimizes "human error". All this has an impact on increasing the security of the installation, and in short, prioritises environmental protection, the main

Bouza-Fernandez, J. (2012). "Development and optimization methodologies for the design

Cao, L. (2009). Wireless mesh monitoring system for sewage treatment plant, *Computing,* 

Jiayu, K. , Linan, M. (2009). An expert system for anaerobic wastewater treatment process,

Kang S., Yan-min S., Guo-chuan F (2009). The Application of the Fuzzy Controller Based on

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Lira, V.V. , da Rocha Neto, J.S., Barros, P.R. & van Haandel, A.C. (2003). Automation of an

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Ph.D. dissertation, Uppsala University, Uppsala, Sweden

and efficient implementation of electro-hidraulic and electro-pneumatic systems" Ph.D. dissertation, Dept. Naval and Oceanic Engineering, University of A Coruña,

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PLC in Sewage Disposal System. *2009 International Conference on Artificial Intelligence and Computational Intelligence*, pp.154-158. ISBN: 978-0-7695-3816-7/09.

*Communication, Control, and Management, 2009. CCCM 2009. ISECS International* 

anaerobic-aerobic wastewater treatment process, *Instrumentation and Measurement,* 

allows us to carry out analysis functions, correct them and act appropriately.

**7. Conclusion** 

to its versatility and ease of programming.

A Coruña, Spain, 2011.

Zhuhai, Macau, 22-24 June

DOI 10.1109/AICI.2009.403.

objective of this process.

**8. References** 


Fig. 16. Warnings Screen Sewage Treatment Plant


Fig. 17. Histogram Screen when the system is on


Fig. 18. Histogram Screen when the system is down
