Abstract
This paper presents a methodology for evaluating the water purification process efficiency attained by 1) jar tests, which are commonly used to determine the treatability of water, and 2) waterworks performance in different phases of the purification process as well as in its entirety. This methodology provides an important tool for the following: 1) determination of optimised reaction conditions under which water is treatable to its best attainable quality; 2) evaluation of the purification process efficiency attained by waterworks during different periods and under different operational conditions; 3) comparisons of performance efficiency of different waterworks; and 4) comprehensive commissioning of waterworks and identification of bottlenecks if any exist in process and plant design. This paper describes procedures for pre-processing of water samples to be analysed as well as mathematical formulas for processing of the results obtained. A few examples of the practical application of the methodology are included and the potential to obtain the optimization of waterworks’ purification processes is herein illustrated.
Highlights
The methods currently used for the evaluation of waterworks performance are based on monitoring the quality of purified water, visual observation of floc formation and in some cases particle counting using different types of electronic counters
Obtaining data required to inform upgrading of an existing works as well as for designing of a new waterworks. The purpose of such an investigation is for the design of optimised processes and reaction conditions which will ensure that water is purified to its best attainable quality in the most efficient and economical manner
The best attainable treatability of water is achieved under the optimised reaction conditions commonly established by jar tests
Summary
The methods currently used for the evaluation of waterworks performance are based on monitoring the quality of purified water, visual observation of floc formation and in some cases particle counting using different types of electronic counters. The methods and testing procedures of this methodology are founded on the study of the dynamics of the water purification processes and are based on the conception of the mechanisms of the formation of aggregates and their separation [1] [3] These methods and testing procedures take into consideration the complexity of the purification process in its entirety and the mutual interdependence of the single processes in the units operation of the waterworks. Obtaining data required to inform upgrading of an existing works as well as for designing of a new waterworks The purpose of such an investigation is for the design of optimised processes and reaction conditions which will ensure that water is purified to its best attainable quality in the most efficient and economical manner. These theoretical assumptions are seldom fully achieved under operational conditions and the individual processes for the formation of aggregates move into subsequent units operation, where optimum conditions for such a process do not exist
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