Comparison of Organic Matter Removal from Synthetic and Real Wastewater in a Laboratory-Scale Soil Aquifer Treatment System

Ak, Mesut; Gündüz, Orhan

doi:10.1007/s11270-013-1467-7

Cited by 21 publications

(12 citation statements)

References 32 publications

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“…The top 20 cm also played an important role in COD removal for different hydraulic conditions. This finding was consistent with previous researches [36]. In this experiment, the removal efficiency of COD by the top 20 cm soil columns was between 34% and 53% for the saturated and unsaturated condition, respectively.…”

Section: Cod Removalsupporting

confidence: 93%

“…The top 20 cm also played an important role in COD removal for different hydraulic conditions. This finding was consistent with previous researches [36]. In this experiment, the removal efficiency of COD by the top 20 cm soil columns was The decreased NH 4 -N concentrations in the columns indicated that a high NH 4 -N removal efficiency occurred in the simulated SAT system even though a large amount of NH 4 -N is reproduced through mineralization of the organic nitrogen.…”

Section: Cod Removalsupporting

confidence: 92%

“…Compared with the impact of DO on the microorganism distribution, the COD concentration played a more significant role in their distributions for both soil columns. The distribution of microorganisms along soil depths was consistent with the findings of Ak and Gunduz [36]. Relatively small quantities of microorganisms in current experiments may be attributed to the water quality of the influent [47].…”

Section: Cod Removalsupporting

confidence: 89%

“…Güngör and Ünlü [34] found that the denitrification performance of the SAT columns decreased significantly when the infiltration operation schedule was switched from 7 days wetting/7 days drying cycles to 3 days wetting/4 days drying cycles. Ak and Gunduz [36] have detected that removal of complex organic matter in treated wastewater is related to the wetting period. Thus, hydraulic conditions have different impacts on the removal of various contaminants and biogeochemical processes.…”

Section: Introductionmentioning

confidence: 99%

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Removal of Nitrogen and COD from Reclaimed Water during Long-Term Simulated Soil Aquifer Treatment System under Different Hydraulic Conditions

Pan

Xiong

Huang

2017

Water

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Abstract:Reclaimed water is an important supplementary source for fresh water. Purification is necessary prior to utilization in order to minimize the pollution and human-health risk. A three-year experiment was carried out to study the removal of nitrogen and organics through a simulated soil aquifer treatment (SAT) system under continuous wetting and wetting/drying conditions. The removal performance of nitrogen and chemical oxygen demand (COD) was improved in the wetting/drying column. The average removal efficiencies of the three years were 51% and 78% for the NO 3 -N, 41% and 51% for the NH 4 -N, and 40% and 50% for the COD in the continuous wetting and wetting/drying columns. Nitrogen and COD removal mainly took place within the top 20 cm of the columns, which was highly correlated with the distribution of microorganisms. The amount of microorganisms was also positively correlated with the content of organic matter and dissolved oxygen (DO) in both soil columns. NO 3 -N can be removed effectively via aerobic denitrifying bacteria as the DO concentration was 3-6 mg/L. DO and NO 3 -N were simultaneously reduced as the electron acceptors for COD degradation, and DO only accounted for 40% of total electron acceptor in COD degradation for the continuous wetting column. Nitrogen and COD can be effectively and steadily removed from reclaimed water during the long-term operation of a SAT system.

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“…The top 20 cm also played an important role in COD removal for different hydraulic conditions. This finding was consistent with previous researches [36]. In this experiment, the removal efficiency of COD by the top 20 cm soil columns was between 34% and 53% for the saturated and unsaturated condition, respectively.…”

Section: Cod Removalsupporting

confidence: 93%

“…The top 20 cm also played an important role in COD removal for different hydraulic conditions. This finding was consistent with previous researches [36]. In this experiment, the removal efficiency of COD by the top 20 cm soil columns was The decreased NH 4 -N concentrations in the columns indicated that a high NH 4 -N removal efficiency occurred in the simulated SAT system even though a large amount of NH 4 -N is reproduced through mineralization of the organic nitrogen.…”

Section: Cod Removalsupporting

confidence: 92%

Section: Cod Removalsupporting

confidence: 89%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Removal of Nitrogen and COD from Reclaimed Water during Long-Term Simulated Soil Aquifer Treatment System under Different Hydraulic Conditions

Pan

Xiong

Huang

2017

Water

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“…To investigate the effect of pH on the phosphate adsorption capacities, 0.050 g of the adsorbent was added The phosphate removal performance of adsorbent in synthetic secondary treated wastewater was also studied, which was prepared according to the reference [35], with the respective carbon (as COD), nitrogen (N), and phosphate (P) concentrations of 100 mg/L, 12 mg/L, and 2 mg/L, respectively. D-glucose, urea, and potassium phosphate were used as C, N, and P sources.…”

Section: Phosphate Adsorption Experimentsmentioning

confidence: 99%

Kinetics, isotherm, thermodynamic, and adsorption mechanism studies of La(OH) 3 -modified exfoliated vermiculites as highly efficient phosphate adsorbents

Huang

Liu

et al. 2014

Chemical Engineering Journal

286

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This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. Abstract:La(OH) 3 -modified exfoliated vermiculites were fabricated, characterized, and investigated for phosphate removal in batch tests for the first time. The BET surface area of the La 5 EV adsorbent, which was synthesized in the solution consisting of 5.00 mmol/g La/exfoliated vermiculite (EV), was significantly increased, accompanied with a larger pore diameter and greater total pore volume, as compared with the unmodified EV. The phosphate adsorption capacity of La 5 EV was approximately one order of magnitude higher than that of EV. Effects of initial phosphate concentration, contact time, temperature, pH, and 2 co-existing ions on the adsorption capacity of La 5 EV were investigated in detail. The experimental equilibrium data were fitted better by using the Langmuir model (maximum adsorption capacity of 79.6 mg P/g) than the Dubinin-Radushkevich or the Freundlich model, suggesting that the adsorption feature be monolayer. Meanwhile, the phosphate adsorption kinetics could be well described by the pseudo-second-order model, and the adsorption process might be controlled by boundary layer (film) diffusion. ∆G°, ∆H° and ∆S° were also determined, in which it was found that the phosphate adsorption , and SO 4 2-had neglectable effects on its phosphate removal capacities. In the synthetic secondary treated wastewater with a low phosphate concentration of 2 mg P/L, 97.9 % of its final adsorption capacity reached in the first 10 min and the phosphate concentration dramatically decreased below 50 µ g P/L. The spent La 5 EV could be regenerated and reused in phosphate adsorption; that could remove more than 70 % phosphate in the 3 rd adsorption-desorption cycle.

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A Wastewater Reclamation Using Soil Aquifer Treatment (SAT) Technology to Enhance Groundwater Recharge

Chandrakanthamma,

Prasanna

2024

Lecture Notes in Civil Engineering

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Comparison of Organic Matter Removal from Synthetic and Real Wastewater in a Laboratory-Scale Soil Aquifer Treatment System

Cited by 21 publications

References 32 publications

Removal of Nitrogen and COD from Reclaimed Water during Long-Term Simulated Soil Aquifer Treatment System under Different Hydraulic Conditions

Removal of Nitrogen and COD from Reclaimed Water during Long-Term Simulated Soil Aquifer Treatment System under Different Hydraulic Conditions

Kinetics, isotherm, thermodynamic, and adsorption mechanism studies of La(OH) 3 -modified exfoliated vermiculites as highly efficient phosphate adsorbents

A Wastewater Reclamation Using Soil Aquifer Treatment (SAT) Technology to Enhance Groundwater Recharge

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