Effects of Ca 2+ on biological nitrogen removal in reverse osmosis concentrate and adsorption treatment

Kim, Hyun Gu; Kim, Sung Su; Kim, Sung Chul; Joo, Hyun Jong

doi:10.1016/j.jiec.2017.08.027

Cited by 21 publications

(6 citation statements)

References 32 publications

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“…Guo et al [75] investigated the effect of salinity on MBR performance and also found that the salinity shock caused a higher influence ion PS than on PN with a salinity concentration of 0.75% and 1.5% NaCl; the changes to PS in EPS were considered to be closely correlated with certain saline-resistance genera. Also, Kim et al [76] investigated the effects of the calcium ions in reverse osmosis (RO) concentrates on biological nitrogen removal and adsorption. They reported that depending on the injected concentration of calcium ions, the adsorption of calcium ions onto the negatively charged microbial surface boosted the production of PS, which increased the intercellular adhesion, played an important role in microbial flocculation, facilitated the AGS formation, and contributed to the growth of granules.…”

Section: Extracellular Polymeric Substancementioning

confidence: 99%

The effects of high salinity on nitrogen removal and the formation characteristics of aerobic granular sludge

Kim

Ahn

2019

Environmental Engineering Research

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This study investigated the biological treatment of high-salinity wastewater using aerobic granular sludge (AGS). The removal performance, AGS characteristics, and microbial community were examined under salinity conditions ranging from 0.5 to 3.0 wt.%. When the salinity was increased, the removal efficiency of the chemical oxygen demand did not change substantially. The mean removal efficiency of NH4+-N ranged from 43.7 to 72.6% during the operation period. As for the concentration of extracellular polymeric substances (EPS), the polysaccharide/protein (PS/PN) ratio increased from 0.37 to 0.57. The concentrations of the mixed liquor suspended solid (MLSS) and mixed liquor volatile suspended solid (MLVSS) were 4,560 and 3,170 mg/L, respectively, in the end phase, and the MLVSS/MLSS ratio decreased from 0.81 to 0.69. The sludge volume index (SVI30) decreased linearly from 88 to 58 mL/g. In the microbial community analysis, Nitrosomonas species accounted for 22.9% of the total bacteria in the initial phase, whereas Halomonas accounted for 43.2% in the end phase. Hence, the gradually increased salinity appears to facilitate the dominance of halophilic microorganisms in the long-term operation of an AGS-based biological treatment system and the stable retention of AGS.

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Section: Extracellular Polymeric Substancementioning

confidence: 99%

The effects of high salinity on nitrogen removal and the formation characteristics of aerobic granular sludge

Kim

Ahn

2019

Environmental Engineering Research

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“…Studies performed with husk powder and other natural wastes are presented in Tab. 4, which shows that the treatments performed on CP favored adsorption capacity of the residue.…”

Section: Adsorption Isothermsmentioning

confidence: 87%

“…In addition to the damage caused by these industrial wastes, inadequate management of solid agri-industrial waste has attracted considerable attention because of the serious risks related to soil, surface, and groundwater pollution. With a view to minimizing the environmental impacts, many researchers, such as Bhatnagar and Sillanpaa [2], Kang et al [3], Kim et al [4], and Silva et al [5], have studied the reuse of agri-industrial waste. The treatment of plant waste in order to add value has been the focus of a number of studies involving biofuels, chemical products, dispersants, additives, and surfactants [6], second-and third-generation alcohol production [7], and bioadsorbents [8].…”

Section: Introductionmentioning

confidence: 99%

Metal Ion Adsorption Using Coconut Shell Powder Activated by Chemical and Physical Treatments

et al. 2021

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A comparative evaluation is presented of physical and chemical treatments performed on coconut shell powder, in relation to the adsorption capacity of Cu 2+ /Cd 2+ ions. The chemical treatment consisted of impregnation with monoethanolamine (mass ratio of 1:1) or a microemulsion (composed of 10 wt % sodium octanoate). The physical treatment was through steam explosion (P = 5 bar, T = 210 °C). Treatment efficiency was assessed using physical characterization of the adsorber material. Assessment of the ion adsorption capacity was performed in batch mode. The comparative investigation was carried out based on the Langmuir model constants, kinetic constants, and thermodynamic parameters. The efficiency of the modifications was also evaluated through adsorptiondesorption cycles.

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“…Wei et al [51] reported that EPS strongly engaged in the sorption process between Zn(II) and the aerobic granular sludge. Kim et al [52] reported that Ca(II) ions (302 ± 54.7 mg/L) in the influent act as the bridges between the negatively charged active sites of microorganisms and EPS. Ca(II) ions were also promoted to increase the size of aerobic granular sludge by enhancing the production of polysaccharides, which played a significant role in increasing the adhesion forces between the microorganism aggregates [53].…”

Section: Tds Removal Mechanism By Biosorption Onto Aerobic Granular Smentioning

confidence: 99%

Removal of Total Dissolved Solids from Reverse Osmosis Concentrates from a Municipal Wastewater Reclamation Plant by Aerobic Granular Sludge

Kim

Park

Yoon

et al. 2018

Water

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Reverse osmosis (RO) has been widely utilized in water reclamation plants and produces a concentrated brine (or reject) stream as a by-product. RO concentrates (ROC) contain vast quantities of salts and dissolved organic matter, such as biomass and humic-like substances, which hinder biological wastewater treatment (such as biological nitrogen removal). In this study, we cultivated granular sludge in an aerobic sequencing batch reactor to treat municipal wastewater with an organic loading rate of 2.1-4.3 kgCOD/m 3 day at room temperature (25 • C), and remove total dissolved solids (TDS) from ROC by biosorption, with aerobic granular sludge as a novel biosorbent. The results of the kinetic experiments demonstrated that TDS removal by aerobic granular sludge was more rapid than that by other coagulants and adsorbents (i.e., calcium hydroxide, polyaluminum chloride, activated sludge, powdered activated carbon, granular activated carbon, and zeolite) under optimal treatment conditions. The biosorption of TDS on the aerobic granular sludge was well-modeled by the Lagergren first-order model, with a maximum biosorption capacity of 1698 mg/g. Thus, aerobic granular sludge could be effective as a regenerable biosorbent for removing the TDS in ROC from municipal wastewater.

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Effects of Ca 2+ on biological nitrogen removal in reverse osmosis concentrate and adsorption treatment

Cited by 21 publications

References 32 publications

The effects of high salinity on nitrogen removal and the formation characteristics of aerobic granular sludge

The effects of high salinity on nitrogen removal and the formation characteristics of aerobic granular sludge

Metal Ion Adsorption Using Coconut Shell Powder Activated by Chemical and Physical Treatments

Removal of Total Dissolved Solids from Reverse Osmosis Concentrates from a Municipal Wastewater Reclamation Plant by Aerobic Granular Sludge

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