By Mark M. Benjamin
Explains the basic concept and arithmetic of water and wastewater remedy processes
By conscientiously explaining either the underlying concept and the underlying arithmetic, this article permits readers to totally clutch the basics of actual and chemical remedy procedures for water and wastewater. through the publication, the authors use targeted examples to demonstrate real-world demanding situations and their options, together with step by step mathematical calculations. every one bankruptcy ends with a suite of difficulties that let readers to place their wisdom into perform through constructing and studying advanced approaches for the removing of soluble and particulate fabrics that allows you to make sure the safeguard of our water supplies.
Designed to provide readers a deep figuring out of ways water therapy strategies really paintings, Water caliber Engineering explores:
- Application of mass balances in non-stop circulate platforms, allowing readers to appreciate and expect adjustments in water quality
- Processes for removal soluble contaminants from water, together with therapy of municipal and business wastes
- Processes for removal particulate fabrics from water
- Membrane approaches to take away either soluble and particulate materials
Following the dialogue of mass balances in non-stop circulation platforms within the first a part of the publication, the authors clarify and examine water remedy procedures in next chapters by means of surroundings forth the correct mass stability for the method, reactor geometry, and circulate development below consideration.
With its many examples and challenge units, Water caliber Engineering is suggested as a textbook for graduate classes in actual and chemical remedy strategies for water and wastewater. via drawing jointly the newest learn findings and practices, this article can also be steered for pro environmental engineers looking for a modern viewpoint on water and wastewater remedy processes.
Read Online or Download Water Quality Engineering: Physical / Chemical Treatment Processes PDF
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Additional resources for Water Quality Engineering: Physical / Chemical Treatment Processes
Example text
8 MASS BALANCES Furthermore, the water is assumed to be well-mixed in the direction perpendicular to the flow as it crosses the system boundary; for example, if the flow is in the þx direction, the concentration of i may vary in the x direction, but not in the yÀz plane at the inlet or outlet. These assumptions are reasonable for many real systems, such as a mixed-tank reactor with inflow and outflow through pipes, a tubular reactor with no internal axial mixing (a plug flow reactor), or a section of a river.
073 mg/L ¼ 73 mg/L. THE MASS BALANCE FOR A SYSTEM WITH UNIDIRECTIONAL FLOW AND CONCENTRATION GRADIENT Combining the Terms into the Overall Mass Balance The overall mass balance for a system with unidirectional flow, a concentration gradient only in the direction of flow, and only one inlet and one outlet can be written by combining the terms described in the preceding sections for the individual processes as @ @t Z & ! @c cdV ¼ Qin cin À Qout cout þ ðD þ ex Þ A @x outlet ! ' Z @c þ ðrV þ rs aÞdV À A (1-26) @x inlet Although Equation 1-26 is applicable to any system with unidirectional flow, it is often quite daunting to use.
Schematic showing the inflows and outflow from the lake in the example system. 18 MASS BALANCES in the lake. On the other hand, the advective terms describe processes at the inlets and outlet, so the concentrations used to compute these terms are the concentrations at the system boundaries. However, because the lake is well-mixed, L in the outlet stream (L3) equals that in the lake (Lin lake).
