Chemical and Microbiological Processes in Gravel-Bed Hydroponic (Gbh) Systems for Sewage Treatment

May, Eric; Butler, John E.; Ford, MG; Ashworth, R.; Williams, J.; Bahgat, M.

doi:10.1016/b978-0-08-040784-5.50008-5

Cited by 21 publications

(9 citation statements)

References 2 publications

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“…The denitrification rate constant in PC medium was 30% more than that in sand layer and three times as much as in G medium. May et al (1990) found that most nitrifiers were associated with roots rather than the gravel layer. Similarly, we found higher specific yield of nitrification rate (u N /Y N ) in G medium, which is the root zone layer.…”

Section: Model Validationmentioning

confidence: 97%

Modeling Subsurface Upflow Wetlands Systems for Wastewater Effluent Treatment

Xuan

Chang

Daranpob

et al. 2010

Environmental Engineering Science

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Constructed wetlands have been popular in ecological engineering regime; yet, modeling the physical, chemical, and biological processes within these wetlands is a long-standing challenge in the past decades. In concert with our field-scale pilot testing of a new-generation subsurface upflow wetland (SUW) system, this article highlights an advancement of modeling the SUW system with a layer-structured compartmental simulation model. This is the first wetland model of its kind to address the complexity between plant nutrient uptake and medium sorption. Such a system dynamics model using STELLA Ò as a means for a graphical formulation was applied to illustrate the essential mechanism of the nitrification and denitrification processes within a sorption mediumbased SUW system, which can be recognized as one of the major passive on-site wastewater treatment technologies in this decade. Model calibration and validation received fairly good R-squared values of 0.9998 and 0.9644, respectively. Such good agreement with the measured data confirms that the developed system dynamics model may provide a reliable tool for designing this particular type of constructed wetland. This work also entails the significant movement of linking green building with green infrastructure as part of the urbanization for nature.

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Section: Model Validationmentioning

confidence: 97%

Modeling Subsurface Upflow Wetlands Systems for Wastewater Effluent Treatment

Xuan

Chang

Daranpob

et al. 2010

Environmental Engineering Science

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“…Many workers (Wolverton et al, 1983;Reddy et al, 1989;Batchelor et al, 1990;Christian, 1990;Coombes, 1990;Findlater et Fisher, 1990;Hiley, 1990;Mann, 1990;May et al, 1990;Radoux and Kemp, 1990;Wolstenholme and Bayes, 1990) have observed significant, if variable, improvements in water quality in these systems. Such systems have also been used in the treatment of a wide range of industrial effluents including those from abattoirs (Finlayson and Chick, 1983), dairies (Tanner et al, 1995), piggeries (Tanner, 1994), chemical plants (Gillette, 1989) and acid runoff from mining spoil (Dawson, 1989).…”

Section: Introductionmentioning

confidence: 98%

The Treatment of Aquaculture Wastewaters—A Botanical Approach

Redding

Todd

Midlen

1997

Journal of Environmental Management

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“…At any temperature above 0°C the mineralization rate increases with temperature (Hershkowitz, 1986). In a SF gravel bed planted with reed the ammonifying bacteria were mostly associated with roots (May et al, 1990;Williams et al, 1994). In this setup the ammonification activity was higher in the rhizome biofilms than in the gravel bed biofilms.…”

Section: Dominant N Cycle Processes In Constructed Wetlandsmentioning

confidence: 89%

NITROGEN ACCUMULATION IN A CONSTRUCTED WETLAND FOR DAIRY WASTEWATER TREATMENT¹

Shamir¹,

Thompson²,

Karpiscak³

et al. 2001

J American Water Resour Assoc

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: A free water surface (FWS) constructed wetland was installed at a dairy in Glendale, Arizona, to study the potential of such a wetland to remove nitrogen (N) from wastewater. The study objectives were: (1) to determine N removal from the wastewater, and (2) to evaluate N accumulation in soil and plant tissues. The system consisted of eight cells (70 × 9 × 1.5 m) planted with Typha domingensis, Scirpus validus, and Phragmites australis. The four cells in series were lined with plastic, and the four cells in a parallel series were lined with clay. Cells received approximately 180 m3/d of partially treated dairy effluent. Plant tissues and soil samples were collected above and below ground from 24 locations during one year. Total N removal from wastewater was about 17 percent. Clay‐lined cells accumulated more N in the soil and less N in plant biomass compared with plastic lined cells. Plant biomass accounted for approximately 60 percent of total N accumulated in cells with dense plant communities. Ninety percent of accumulated soil N was organic. Total N accumulated in soil reached a maximum (1,100 mg/kg) eight months after the introduction of wastewater.

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Chemical and Microbiological Processes in Gravel-Bed Hydroponic (Gbh) Systems for Sewage Treatment

Cited by 21 publications

References 2 publications

Modeling Subsurface Upflow Wetlands Systems for Wastewater Effluent Treatment

Modeling Subsurface Upflow Wetlands Systems for Wastewater Effluent Treatment

The Treatment of Aquaculture Wastewaters—A Botanical Approach

NITROGEN ACCUMULATION IN A CONSTRUCTED WETLAND FOR DAIRY WASTEWATER TREATMENT¹

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Chemical and Microbiological Processes in Gravel-Bed Hydroponic (Gbh) Systems for Sewage Treatment

Cited by 21 publications

References 2 publications

Modeling Subsurface Upflow Wetlands Systems for Wastewater Effluent Treatment

Modeling Subsurface Upflow Wetlands Systems for Wastewater Effluent Treatment

The Treatment of Aquaculture Wastewaters—A Botanical Approach

NITROGEN ACCUMULATION IN A CONSTRUCTED WETLAND FOR DAIRY WASTEWATER TREATMENT1

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NITROGEN ACCUMULATION IN A CONSTRUCTED WETLAND FOR DAIRY WASTEWATER TREATMENT¹