Oxygenation and carbon dioxide control in water reuse systems

Summerfelt, Steven T.; Vinci, Brian J.; Piedrahita, Raul H.

doi:10.1016/s0144-8609(00)00034-0

Cited by 111 publications

(64 citation statements)

References 13 publications

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“…Aeration is a method where bubbling air is pumped into the water or when water droplets are forced into contact with air. Oxygenation is where pure oxygen gas is injected into the water [57].…”

Section: Controlling Do and Comentioning

confidence: 99%

Taxonomy of Means and Ends in Aquaculture Production—Part 1: The Functions

Björnsdóttir

Oddsson

Thorarinsdottir

et al. 2016

Water

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Abstract:The aquaculture sector has been increasing its share in the total fish production in the world. Numerous studies have been published about aquaculture, introducing a variety of techniques and methods that have been applied or could be applied in aquaculture production systems. The purpose of this study is to present a systemic overview of the functions of aquaculture production systems. Each function of an aquaculture system is applied to carry out a certain purpose. The results are divided into three sets of functions: input, treatment, and output. Input functions deal with what happens before the rearing area, treatment functions are about what happens inside the rearing area, and output functions is what comes out of the system. In this study, five input functions, ten treatment functions, and five output functions are indentified. For each function the controlling parameters or indicators were identified and then a list of possible methods or technological solutions in order to carry out the function was compiled. The results are presented in a system map that aggregates all functions used in different types of aquaculture systems along with their methods of solution. This is the first of four articles that together generate taxonomy of both means and ends in aquaculture. The aim is to identify both the technical solutions (means) that solve different functions (ends) and the corresponding functions. This article is about the functions.

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Section: Controlling Do and Comentioning

confidence: 99%

Taxonomy of Means and Ends in Aquaculture Production—Part 1: The Functions

Björnsdóttir

Oddsson

Thorarinsdottir

et al. 2016

Water

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“…These bases are either carbon-containing (such as sodium bicarbonate) or not (such as sodium hydroxide). Carbon-containing bases also increase the total carbonate carbon in the system [31]. However, this requires careful monitoring and needs to be in conjunction with the management of the pH and alkalinity in the system.…”

Section: Controlling Do and Comentioning

confidence: 99%

“…Some types of biofilters also provide aeration and some CO 2 stripping. Trickling filters can aerate the water and provide some CO 2 stripping [31,32]. Floating microbead biological filters can provide CO 2 stripping.…”

Section: Controlling Do and Comentioning

confidence: 99%

Taxonomy of Means and Ends in Aquaculture Production—Part 4: The Mapping of Technical Solutions onto Multiple Treatment Functions

Vilbergsson¹,

Oddsson²,

Unnþórsson³

2016

Water

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Designing aquaculture production units will require decisions on which treatment to include, e.g., the intensification of the system, and then a decision on a technical solution for each treatment function selected to implement. To complicate matters, each technical solution is not unique to each treatment function, but has a multiple effect on the system. This interaction of a technical solution to multiple treatment functions will play a part in the decision making process. Previous work by the authors has made a taxonomy of all technical solutions for the treatment function, and in this article, how technical solutions affect treatment functions is mapped. The article views the aquaculture production system as a transformation process with three sets of functions, input, treatment and output. Based on a comprehensive literature review where all technical solutions were found and categorized into a taxonomy, their effect on treatment function was mapped using a quality function deployment (QFD). The result is a matrix that gives an evaluation on the interaction. This work is a step towards an aquaculture engineering design methodology.

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“…Theoretical background can be found in Boyd (1998), Summerfelt et al (2000) and Vinatea & Carvalho (2007) 3.4 Nitrogen compounds Ebeling et al (2006) pointed out the following: for every gram of ammonia-nitrogen converted to nitrate-nitrogen, 4.18 of dissolved oxygen and 7.05 g of alkalinity (1.69 g of inorganic carbon) are consumed and 0.20 g of microbial biomass (0.105 g organic carbon) and 5.85 g of CO 2 (1.59 g inorganic carbon) are produced. So the nitrogen cycle in pond water affects the physical, chemical and biological components present in the system.…”

Section: Dissolved Oxygenmentioning

confidence: 99%