Oxygenation and carbon dioxide control in water reuse systems
نویسندگان
چکیده
Control of dissolved gases, especially oxygen and carbon dioxide, is an essential component of intensive water reuse systems. Control of both dissolved oxygen and carbon dioxide concentrations is typically carried out by means of gas transfer processes, although chemical processes are also used to control carbon dioxide concentration. Theoretical and practical considerations of oxygenation and carbon dioxide removal are reviewed in this paper. The theory of gas transfer is presented in general terms, followed by a more detailed description of the basis for a new calculation procedure for carbon dioxide degassing processes. Equipment used for oxygen injection is described, and a new method for estimating packed column degassing parameters is introduced. © 2000 Elsevier Science B.V. All rights reserved.
منابع مشابه
Membrane Based Co2 Removal from Spacesuits
INTRODUCTION Closed loop life support systems, such as in spacecraft or space suits, require removal of carbon dioxide and water vapor from the atmosphere. A membrane device that separates CO2 from breathing air can effectively control CO2 levels by venting the carbon dioxide directly to the vacuum of space. Such a membrane device requires no regeneration and therefore imposes no limitation on ...
متن کاملCarbon footprint of water reuse and desalination: a review of greenhouse gas emissions and estimation tools
As population and water demand increase, there is a growing need for alternative water supplies from water reuse and desalination systems. These systems are beneficial to water augmentation; however, there are concerns related to their carbon footprint. This study compiles the reported carbon footprint of these systems from existing literature, recognizes general trends of carbon footprint of w...
متن کاملModeling of Combustion and Carbon Oxides Formation in Direct Injection Diesel Engine
When looking at the effects of diesel engine exhaust on the environment, it is important to first look at the composition of the exhaust gases. Over 99.5% of the exhaust gases are a combination of nitrogen, oxygen, carbon dioxide, and water. With the exception of carbon dioxide, which contributes about 5% of the total volume, the diesel engine exhaust consists of elements which are part of...
متن کاملAn Experimental Investigation of Reactive Absorption of Carbon Dioxide into an Aqueous NH3/H2O/NaOH Solution
In this research, the reactive absorption of carbon dioxide in an aqueous solution of NH3, H2O, and NaOH has experimentally been investigated. The experiments were carried out in an absorption pilot plant in different operational conditions. The composition and temperature of both gas and liquid phases were obtained during the column height. The concentration of molecular ...
متن کاملReuse of Refinery Treated Wastewater in Cooling Towers
In this report, experimental investigation of waste water treatment by reverse osmosis to enable its reuse in cooling tower is presented. A polyamide spiral wound RO membrane followed by three filters as RO pretreatment (two activated carbon and one cartridge filter) and samples of Tehran refinery treated waste water have been used. The effect of operating conditions such as pressure differ...
متن کامل