STANDARD METHODS FOR THE EXAMINATION OF WATER AND WASTE-WATER (12th ed.)

McCrady, M. H.

doi:10.2105/ajph.56.4.684-a

Cited by 130 publications

(30 citation statements)

References 1 publication

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“…The concentrations of NH 4 + -N and NO 2 À -N were measured according to standard methods. 31 The Agilent 6890N Gas Chromatograph equipped with a TCD was used to analyse the content of N 2.…”

mentioning

confidence: 99%

Synthesis and characterization of ferric tannate as a novel porous adsorptive-catalyst for nitrogen removal from wastewater

Zhang

Liu

2015

RSC Adv.

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Ferric tannate has unique adsorption capacities for NH 4 + -N and NO 2 À -N simultaneously. So far, no normative method is available for synthesizing ferric tannate. In this work, an optimized method for synthesizing ferric tannate by using tannic acid and ferric chloride is established under the conditions of room temperature and neutral pH. The optimal molar ratio of tannic acid and ferric chloride were determined to be in the range of 1 : 20 to 1 : 25 based on the yield and stability of the ferric tannate composite. Scanning electron microscopy, the Brunauer-Emmett-Teller method, X-ray diffraction, andFourier transform infrared spectrometry were used to characterize the ferric tannate composite. The results showed that the ferric tannate has a rough and porous surface, a large surface area, and an -N was 98.1% and 96.2%, respectively, after 3.0 hours of reaction. The conversion rate of N 2 increased to 87.1%. Therefore, ferric tannate can be used as a potential material for removing nitrogen from wastewater in the future.

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confidence: 99%

Synthesis and characterization of ferric tannate as a novel porous adsorptive-catalyst for nitrogen removal from wastewater

Zhang

Liu

2015

RSC Adv.

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“…Sludge samples were centrifuged at 18,000× g for 15 min. The total solids (TS) and volatile solids (VS), capillary suction time (CST), total chemical oxygen demand (TCOD), and soluble chemical oxygen demand (SCOD) of the samples were measured by standard methods [21]. The methane produced in the reactor during the incubation was measured using a gas chromatograph (Auto System Perkin Elmer, Waltham, MA).…”

Section: Methodsmentioning

confidence: 99%

Steam Explosion Pretreatment of Sludge for Pharmaceutical Removal and Heavy Metal Release to Improve Biodegradability and Biogas Production

et al. 2020

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Steam explosion pretreatment was developed and evaluated to remove pharmaceuticals and heavy metals from wastewater sludge and to improve its biodegradability and methane yield. Effects of pressure (5–15 bar) and duration (1–15 min) during the pretreatment were examined, and the pretreatment efficiency was evaluated based on the solubilization degree, the capillary suction time (CST) test and anaerobic digestion. The removal efficiency of ibuprofen, acetaminophen, and amoxicillin was 65%, 69%, and 66% and 70%, 66%, and 70% in primary sludge (PS) and waste-activated sludge (WAS), respectively. The highest percent release efficiency of heavy metals, i.e., lead, cadmium, and silver, for PS and WAS was 78%, 70%, and 79% and 79%, 80%, and 75%, respectively. The highest methane yield was obtained after pretreatment at 10 bar for 15 min and at 15 bar for 10 min, with respective yields of 380 and 358 mL CH4/g volatile solids (VS) for the PS and 315 and 334 mL CH4/g VS for the WAS. The results of methane production indicated that the decreased concentrations of pharmaceuticals and heavy metals resulted in increased biodegradability of PS and WAS.

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“…Ammonium, nitrite, and nitrate were analyzed by colorimetric methods using spectrophotometer (UNIC, UV-2800, Danding International Trade Co., Ltd., Shanghai, China) [16]. Mixed liquor volatile suspended solids (MLVSSs) were determined using gravimetric method [17].…”

Section: Effluent Sampling and Chemical Analysis Methodsmentioning

confidence: 99%

Feasibility of Adjusting the S2O32−/NO3− Ratio to Adapt to Dynamic Influents in Coupled Anammox and Denitrification Systems

Hou

Cheng

Wang

et al. 2020

IJERPH

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In this study, anammox, sulfur-based autotrophic denitrification, and heterotrophic denitrification (A/SAD/HD) were coupled in an expanded granular sludge bed (EGSB) reactor to explore the feasibility of enhancing denitrification performance by adjusting the S2O32−/NO3− (S/N) ratio to accommodate dynamic influents. The results indicated that the optimal influent conditions occurred when the conversion efficiency of ammonium (CEA) was 55%, the S/N ratio was 1.24, and the chemical oxygen demand (COD) was 50 mg/L, which resulted in a total nitrogen removal efficiency (NRE) of 95.0% ± 0.5%. The S/N ratio regulation strategy was feasible when the influent COD concentration was less than 100 mg/L and the CEA was between 57% and 63%. Characterization by 16S rRNA sequencing showed that Candidatus Jettenia might have contributed the most to anammox, while Thiobacillus and Denitratisoma were the dominant taxa related to denitrification. The findings of this study provide insights into the effects of CEA and COD on the performance of the A/SAD/HD system and the feasibility of the S/N ratio regulation strategy.

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STANDARD METHODS FOR THE EXAMINATION OF WATER AND WASTE-WATER (12th ed.)

Cited by 130 publications

References 1 publication

Synthesis and characterization of ferric tannate as a novel porous adsorptive-catalyst for nitrogen removal from wastewater

Synthesis and characterization of ferric tannate as a novel porous adsorptive-catalyst for nitrogen removal from wastewater

Steam Explosion Pretreatment of Sludge for Pharmaceutical Removal and Heavy Metal Release to Improve Biodegradability and Biogas Production

Feasibility of Adjusting the S2O32−/NO3− Ratio to Adapt to Dynamic Influents in Coupled Anammox and Denitrification Systems

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