As we move into the 1990's, upgrading of existing wastewater treatment plants is becoming a very important consideration. Although upgrading can take many forms, one of the most economic is to optimize the performance of the existing equipment and structures. In the realm of sludge dewatering, also an increasingly important topic, an area which has received little attention in the past is the control of the sludge conditioning process prior to dewatering. In conjunction with the Wastewater Technology Centre in Burlington, Canada, ZENON Water Systems Inc. has developed the Sludge Conditioning Controller (SCC) to fulfill this need in the wastewater marketplace. A description of both the hardware and software aspects of the SCC are presented. In addition, typical operating performance of the microprocessor-based system is shown. Experience with full scale systems has revealed that the benefits associated with the SCC far exceed the original objective of saving polymer. The others include automation of the dewatering device operation, increased capacity, and more uniform performance of the dewatering machine.
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The Technidyne PROFILE/Plus is designed as a modular system. It is a unique approach to the process of automating a laboratory. The PROFILE/Plus has been implemented in many installations. The method of implementation varies greatly. Many installations began as two or three instruments with additional instruments added at a later date. Many of the instruments are currently used as individual instruments with plans for automation in the future. Other installations have been full featured systems installed during the initial process as the budget provided while others have installed and later reconfigured their systems as their testing needs changed. This wide variation is a testament to the PROFILE/Plus concept, its affordability and flexibility. If the paper mills testing needs change, initial investment is not lost. Simply add, change or move instruments to meet the new testing requirements.
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