Nitrosamine removal: Pilot-scale comparison of advanced oxidation, nanofiltration, and biological activated carbon processes

Chemosphere ◽  
2021 ◽  
pp. 130249
Author(s):  
Hye J. Kang ◽  
Jeongeem Ahn ◽  
Hyeona Park ◽  
Kwang-Ho Choo
Keyword(s):  
Activated Carbon ◽  
Advanced Oxidation ◽  
Pilot Scale ◽  
Biological Activated Carbon

scholarly journals Effect of advanced oxidation on N-nitrosodimethylamine (NDMA) formation and microbial ecology during pilot-scale biological activated carbon filtration

2017 ◽  
Vol 113 ◽  
pp. 160-170 ◽  
Author(s):  
Dong Li ◽  
Ben Stanford ◽  
Eric Dickenson ◽  
Wendell O. Khunjar ◽  
Carissa L. Homme ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Microbial Ecology ◽  
Advanced Oxidation ◽  
Pilot Scale ◽  
Biological Activated Carbon ◽  
Carbon Filtration

Removal of algal taste and odour compounds by granular and biological activated carbon in full-scale water treatment plants

2018 ◽  
Vol 18 (5) ◽  
pp. 1531-1544 ◽  
Author(s):  
Aisha Faruqi ◽  
Milann Henderson ◽  
Rita K. Henderson ◽  
Richard Stuetz ◽  
Brendan Gladman ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Algal Blooms ◽  
Pilot Scale ◽  
Full Scale ◽  
Biologically Active ◽  
Removal Rates ◽  
Biological Activated Carbon ◽  
Treatment Processes ◽  
Water Treatment Plants ◽  
Service Life Modelling

Abstract The occurrence and severity of cyanobacterial and algal blooms in water supplies has been increasing due to the effects of eutrophication and climate change, resulting in more frequent taste and odour (T&O) events. Conventional treatment processes have been found to be inefficient in removing the two most commonly detected algal T&O compounds, geosmin and 2-methylisoborneol (MIB), though granular activated carbon (GAC) and biological activated carbon (BAC) contactors have achieved high T&O removal rates. Literature on the performance of GAC and BAC for T&O removal in full-scale treatment plants, however, is limited. This review collates and assesses pilot-scale and full-scale studies which focus on removal of geosmin and MIB, with the aim of understanding the factors which influence T&O removal and determining knowledge gaps in the use of GAC and BAC. Age and empty bed contact time (EBCT) were found to have a significant impact on GAC performance, with removal efficiency decreasing with increased age and increasing with longer EBCTs. BAC contactors have achieved higher removal rates than non-biologically active GAC contactors and were not impacted by age, EBCT and/or carbon type. From these observations, implementation of BAC for T&O removal would be favourable; however, further investigations are required to understand full-scale performance of BAC and service life modelling.

The Combination Process of Ozone/Ultraviolet/Biological Activated Carbon Filter for Treatment of Huaihe Micro-Polluted Water

2013 ◽  
Vol 295-298 ◽  
pp. 1384-1388 ◽  
Author(s):  
Dao Ji Wu ◽  
Xiao Xiang Cheng ◽  
Xue Dong Zhai ◽  
Yan Jie Wang
Keyword(s):  
Activated Carbon ◽  
Removal Efficiency ◽  
Pilot Scale ◽  
Polluted Water ◽  
Biological Activated Carbon ◽  
Combination Process ◽  
Activated Carbon Filter ◽  
Scale Test ◽  
Biological Activated Carbon Filter ◽  
Uv Oxidation

Aim at experimenting the micro-polluted characteristic of Huaihe River water, a pilot-scale test by the combination process of ozone/ultraviolet (UV) /biological activated carbon (BAC) filter for advanced treatment of drinking water was applied. The removal efficiency of general pollution indexes by combined process with different ozone dosages (1.0~3.0 mg/L) was investigated. Along with the increase of ozone dosage, the removal efficiency of CODMn and UV254 generally increased in ozone/UV oxidation process; The removal effect of NO2--N by ozone/UV oxidation was obvious; The removal of turbidity and NH3-N was mainly in BAC filter phase; When the ozone dosage was 2.0~2.5 mg/L, the general pollution indexes had gotten satisfying results, thus it was not necessary to increase the ozone dosage.

scholarly journals Mesoporous structure regulation of activated carbons and effects on the synergistic efficacy of synchronous adsorption and Bio-degradation in biological activated carbon process

2020 ◽  
Author(s):  
Xu-Jin Gong ◽  
Yu-Qi Dong ◽  
Wei-Guang Li
Keyword(s):  
Activated Carbon ◽  
Activated Carbons ◽  
Mesoporous Structure ◽  
Pilot Scale ◽  
Small Scale ◽  
Organic Matters ◽  
Biological Activated Carbon ◽  
Adsorption Capacities ◽  
Natural Organic Matters ◽  
Degradation Ability

Abstract Mesoporous activated carbon MCGL-4 was tailored for simultaneous enhancement of adsorption and bio-degradation by multistage depth-activation (MDA). Synergistic efficacy of synchronous adsorption and bio-degradation was evaluated in pilot-scale bio-enhanced activated carbon (BEAC) system. Results identified that MCGL-4 obtains synchronously well-developed meso- (0.7605 cm3/g), micro- (0.2655 cm3/g) and macro-porous (0.143 cm3/g) structures. Higher volume during 20.4–208.2 Å (0.6848 cm3/g) ensured higher adsorption capacities for natural organic matters (NOM). The initial immobilized biomass and stabilities on MCGL-4 were also significantly promoted. Rapid small-scale column tests system (RSSCTs) tests showed that adsorption capacities for humic-like organics were 67,725.32 mg·DOC/(kg·carbon) at 39.50 m3·H2O/(kg·carbon). In BEAC system, MCGL-4 achieved higher removal efficiency for fulvic acid, humic acid and aromatic organic matters than commercial carbons. At 39.50 m3·H2O/(kg·carbon), cumulative uptake of organic-pollutants achieved by MCGL-4 was 94,850.51 mg·DOC/(kg·carbon). The proportion occupied by bio-degradation were 31,674.70 mg·DOC/(kg·carbon). It also confirmed that bio-degradation ability was much higher than commercial carbons after mesoporous structures regulation by MDA process.

The performance of an ozonation-biological activated carbon process under long term operation

1998 ◽  
Vol 38 (6) ◽  
pp. 163-169 ◽  
Author(s):  
Wataru Nishijima ◽  
Woo Hang Kim ◽  
Eiji Shoto ◽  
Mitsumasa Okada
Keyword(s):  
Drinking Water ◽  
Activated Carbon ◽  
Water Supply ◽  
Water Temperature ◽  
Seasonal Changes ◽  
Pilot Scale ◽  
Raw Water ◽  
Biological Activated Carbon ◽  
Term Operation

The objective of this study is to evaluate removal of DOC and THMFP during long term operation of an ozonation-biological activated carbon (BAC) process. A pilot scale plant with raw water in an eutrophic reservoir for drinking water supply was operated for 910 days. High DOC and THMFP removal were maintained at 36% and 57%, respectively, in the ozonation-BAC process even after saturation of BAC by DOC. DOC and THMFP removal by ozonation were only 8% and 24%, respectively. High DOC and THMFP removal after saturation was due to the increase in biodegradable DOC by ozonation from 7% to 32% and the subsequent biodegradation by bacteria attached on BAC. Although water temperature changed in the range from 5 to 30°C, seasonal changes in DOC and THMFP removal were not observed in the ozonation-BAC process.

Removal of micropollutants in WWTP effluent by biological assisted membrane carbon filtration (BioMAC)

2011 ◽  
Vol 63 (1) ◽  
pp. 72-79 ◽  
Author(s):  
M. Weemaes ◽  
G. Fink ◽  
C. Lachmund ◽  
A. Magdeburg ◽  
D. Stalter ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Complete Removal ◽  
Pilot Scale ◽  
Iodinated Contrast Media ◽  
Biological Activated Carbon ◽  
Iodinated Contrast ◽  
Wwtp Effluent ◽  
Androgenic Activity ◽  
Set Up ◽  
Carbon Filtration

In the frame of the European FP6 project Neptune, a combination of biological activated carbon with ultrafiltration (BioMAC) was investigated for micropollutant, pathogen and ecotoxicity removal. One pilot scale set-up and two lab-scale set-ups, of which in one set-up the granular activated carbon (GAC) was replaced by sand, were followed up during a period of 11 months. It was found that a combination of GAC and ultrafiltration led to an almost complete removal of antibiotics and a high removal (>80%) of most of the investigated acidic pharmaceuticals and iodinated contrast media. The duration of the tests did however not allow to conclude that the biological activation was able to extend the lifetime of the GAC. Furthermore, a significant decrease in estrogenic and anti-androgenic activity could be illustrated. The set-up in which GAC was replaced by sand showed a considerably lower removal efficiency for micropollutants, especially for antibiotics but no influence on steroid activity.

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