Ion Exchange for Nitrate Removal

Cliford, Dennis; Liu, Xiaosha

doi:10.1002/j.1551-8833.1993.tb05971.x

Cited by 105 publications

(54 citation statements)

References 12 publications

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“…Ion exchange is another form of sorption that is typically used to remove heavy metal ions [176,178,198] and other non-metal ions [183,[199][200][201][202][203][204][205][206][207][208] from solution and replace them with less toxic ions [176,209]. Depending on the ion exchange resin used, the cost can vary significantly.…”

Section: Adsorptionmentioning

confidence: 99%

Engineered nanomaterials for water treatment and remediation: Costs, benefits, and applicability

Adeleye

Conway

Garner

et al. 2016

Chemical Engineering Journal

670

229

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Section: Adsorptionmentioning

confidence: 99%

Engineered nanomaterials for water treatment and remediation: Costs, benefits, and applicability

Adeleye

Conway

Garner

et al. 2016

Chemical Engineering Journal

670

229

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“…One could assume that further reduction could be attained by simply reducing the SCOD concentration in the reactor influent. However, previous research (Dahab and Sirigina, 1994;Clifford and Liu, 1993) has suggested that serious increases in nitrite concentration could be experienced if the carbon concentration is decreased below recommended stoichiometric limits.…”

Section: Discussionmentioning

confidence: 98%

“…(SBR), and fluidized-bed reactors have been used successfully for removing nitrate-nitrogen from water even when concentrations are as high as 700-900 mg NO 3 À -N L À1 (van der Hoek and Klapwijk, 1987;Clifford and Liu, 1993;Mihaltz et al, 1997). These reactor designs have an advantage over static-bed processes in that better biomass control can be maintained within the reactors.…”

Section: Nitrate Removal Using Biodenitrificationmentioning

confidence: 99%

Comparison of conventional and two-stage reversible flow, static-bed biodenitrification reactors

Woodbury

Dahab

2001

Water Research

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Abstract}This paper compares the operation of a traditional single-stage system with a two-stage, reversible flow biodenitrification system for removing nitrates from drinking water. The purpose of this study was to investigate the ability of these two-stage systems to remove nitrate and residual organics from treated water as compared to single-stage units. In the reversible flow system, the second-stage (i.e. follow) reactor is operated in series with the first-stage (i.e. lead) reactor. After a given period of operation, the flow regime is reversed so that the follow reactor becomes the lead one and vice versa. The active solids remaining in the follow reactor (previously the lead one) are capable of removing residual soluble organics and nitrates to levels below the concentrations provided by single-stage units particularly at HRTs as low as 0.5 h. Nitrate-nitrogen removal efficiency improved slightly from 98 to 99.5% for the single-and twostage systems, respectively. Most notably, reversible flow reactors were found to reduce long-term effluent residual organics concentrations with an average of approximately 1/3 that of the single-stage system. Also the reversible flow system, with its design redundancy, demonstrated the ability to receive extreme shock loads with no sustained loss of treatment efficiency. #

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“…In marine environment, it induces plankton bloom destroying the native lora and fauna of the region [13]. In humans, it causes condition known as methemoglobinemia (blue baby syndrome) in infants and disorders of central nervous system, cardiovascular system as well as gastrointestinal system while posing to be carcinogenic [14].…”

Section: Introductionmentioning

confidence: 99%

Microbe-Based Strategy for Plant Nutrient Management

Chaudhuri¹,

Mishra²,

De³

et al. 2017

Biological Wastewater Treatment and Resource Recovery

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The rapid industrialization and urbanization of developing countries such as India have encroached on cultivable lands to meet the demands of an ever-increasing population. The altered land use paterns with increased fertilizer use has increased crop yields with leaching of major portion of the applied nutrients from the soil. Nitrates and phosphates are the agricultural pollutants that are discharged into aquifers due to anthropogenic reasons causing severe environmental and health problems. Production of these nutrients requires energy and inite resources (rock phosphate, which has gradually depleting reserves). An alternative management strategy would be to sequester excess nutrients within a biomass that is reused for agriculture. Two discrete enriched microbial consortia with the potential of simultaneous nitrate and phosphate sequestration upon application as biofertilizer restricted them within the plant root zone, ensuring prevention of eutrophication through leaching while making it available for uptake by plants. The nutrient accumulated biomass enhanced the crop yield by 21.88% during mung bean cultivation with maintained elemental content and other nutritional qualities. The major drawback of conventional biofertilizer application (slow release and action) could be overcome using this formulation leading to environmental protection, crop yield enhancement and soil fertility maintenance post-cultivation.

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Ion Exchange for Nitrate Removal

Cited by 105 publications

References 12 publications

Engineered nanomaterials for water treatment and remediation: Costs, benefits, and applicability

Engineered nanomaterials for water treatment and remediation: Costs, benefits, and applicability

Comparison of conventional and two-stage reversible flow, static-bed biodenitrification reactors

Microbe-Based Strategy for Plant Nutrient Management

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