scholarly journals Options for Removing Refractory Organic Substances in Pre-Treated Process Water from Hydrothermal Carbonization

Water ◽  
2019 ◽  
Vol 11 (4) ◽  
pp. 730 ◽  
Author(s):  
Joachim Fettig ◽  
Ute Austermann-Haun ◽  
Jan-Felix Meier ◽  
Anna Busch ◽  
Eva Gilbert
Keyword(s):  
Activated Carbon ◽  
Granular Activated Carbon ◽  
Hydrothermal Carbonization ◽  
Treatment Method ◽  
Breakthrough Curves ◽  
Reaction Products ◽  
Adsorption Model ◽  
Molecular Weights ◽  
Spent Grains ◽  
Kinetic Tests

Granular activated carbon (GAC) adsorption, as well as ozonation in combination with biodegradation was investigated in order to remove refractory organics from biologically pre-treated process waters (PW) produced by the hydrothermal carbonization (HTC) of spent grains and fine mulch. Kinetic tests revealed that the organics in spent grains PW had much lower molecular weights than organics in fine mulch PW. Moreover, isotherms showed that they were more strongly adsorbable. This was confirmed in GAC column experiments, where the breakthrough curves could be predicted fairly well by a dynamic adsorption model. On the other hand, ozonation had a stronger effect on fine mulch PW with respect to an enhancement of the aerobic degradability. Thus, the type of input material determines the properties of soluble reaction products from the carbonization process that must be accounted for when selecting the most suitable post-treatment method for HTC PW. However, adsorption on granular activated carbon should always be the final stage.

scholarly journals Removal of organochlorine pesticides from water using virgin and regenerated granular activated carbon

2010 ◽  
Vol 75 (4) ◽  
pp. 565-573 ◽  
Author(s):  
Mirjana Ninkovic ◽  
Rada Petrovic ◽  
Mila Lausevic
Keyword(s):  
Activated Carbon ◽  
Granular Activated Carbon ◽  
Breakthrough Curves ◽  
Water Production ◽  
Saturation Point ◽  
Chlorinated Pesticides ◽  
Halogenated Aromatic Hydrocarbons ◽  
Adsorption Capacities ◽  
Public Water Systems ◽  
Derivatives Of

Public water systems use granular activated carbon in order to eliminate pesticides. After saturation, the used activated carbon is regenerated and reused in order to reduce the costs of water production and minimize waste. In this study, the adsorption of 10 different chlorinated pesticides from water using columns packed with commercial virgin and regenerated granular activated carbon was simulated in order to compare their adsorption capacities for different chlorinated pesticides. The breakthrough curves showed that chlorinated pesticides from the group of hexachlorocyclohexane (HCH) were poorly adsorbed, followed by cyclodiens as averagely adsorbed and the derivatives of halogenated aromatic hydrocarbons (DDT) as strongly absorbed. However, the adsorption capacity of regenerated granular activated carbon was considerably lower for tested pesticides compared to the virgin granular carbon. In addition, rinsing of the pesticides after the saturation point is a far more efficient process on regenerated carbon.

scholarly journals Behaviors of hydrogen sulfide removal using granular activated carbon and modified granular activated carbon

2018 ◽  
Vol 192 ◽  
pp. 03037 ◽  
Author(s):  
Songkiat Roddaeng ◽  
Pongjet Promvonge ◽  
Rewadee Anuwattana
Keyword(s):  
Activated Carbon ◽  
Fixed Bed ◽  
Surface Adsorption ◽  
Granular Activated Carbon ◽  
Breakthrough Curves ◽  
Fixed Bed Column ◽  
Hydrogen Sulfide Removal ◽  
Solid Adsorbent ◽  
Adsorption Capacities ◽  
H2s Adsorption

An experimental study on hydrogen sulphide (H2S) adsorption behaviours using amine-impregnated solid adsorbent (GAC/PEI) was carried out for H2S concentration in the range of 200 and 400 ppm. The dynamic adsorptions of GAC and modified GAC (2.0 and 1000 g/L PEI) in a fixed-bed column were investigated by determining the breakthrough curves and adsorption capacities of various adsorbents. The adsorbent exhibits an excellent adsorption capacity of 106.87 and 231.45 mgH2S/g-adsorbent for 200 ppm and 400 ppm H2S, respectively. The H2S breakthrough capacity is found to relate to the surface adsorption and chemical adsorption.

Rapid small-scale column testing of granular activated carbon for organic micro-pollutant removal in treated domestic wastewater

2014 ◽  
Vol 70 (7) ◽  
pp. 1271-1278 ◽  
Author(s):  
F. Zietzschmann ◽  
J. Müller ◽  
A. Sperlich ◽  
A. S. Ruhl ◽  
F. Meinel ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Pure Water ◽  
Treatment Plant ◽  
Domestic Wastewater ◽  
Granular Activated Carbon ◽  
Breakthrough Curves ◽  
Pollutant Removal ◽  
Small Scale ◽  
Hydrodynamic Conditions ◽  
Wwtp Effluent

This study investigates the applicability of the rapid small-scale column test (RSSCT) concept for testing of granular activated carbon (GAC) for organic micro-pollutants (OMPs) removal from wastewater treatment plant (WWTP) effluent. The chosen experimental setup was checked using pure water, WWTP effluent, different GAC products, and variable hydrodynamic conditions with different flow velocities and differently sized GAC, as well as different empty bed contact times (EBCTs). The setup results in satisfying reproducibility and robustness. RSSCTs in combination with WWTP effluent are effective when comparing the OMP removal potentials of different GAC products and are a useful tool for the estimation of larger filters. Due to the potentially high competition between OMPs and bulk organics, breakthrough curves are likely to have unfavorable shapes when treating WWTP effluent. This effect can be counteracted by extending the EBCT. With respect to the strong competition observed in GAC treatment of WWTP effluent, the small organic acid and neutral substances are retained longer in the RSSCT filters and are likely to cause the majority of the observed adsorption competition with OMPs.

scholarly journals Study on color removal of Sewage Treatment Plant (STP) effluent using granular activated carbon

2018 ◽  
Vol 156 ◽  
pp. 03011
Author(s):  
Anita Nurfida ◽  
I Nyoman Widiasa
Keyword(s):  
Activated Carbon ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Granular Activated Carbon ◽  
Continuous Treatment ◽  
Adsorption Model ◽  
Activated Carbon Adsorption ◽  
Isotherm Adsorption ◽  
True Color

Recycling of sewage treatment plant (STP) effluent is one of the attractive solutions to fulfill clean water for hotels and malls in Indonesia. STP effluent has average characteristics as follow: pH 6.8; color (true color) 107 PtCo; A254 (UV absorption) 0.36 cm-1 and COD 35.9 mg/L. Because of high color and organics contents, STP effluent needs further treatment such as activated carbon adsorption. Batch and continuous treatment of synthetic STP effluent by a commercial granular activated carbon (Filtrasorb 300) were investigated. The results show that adsorption capacity of the Filtrasorb 300 for color body of STP effluent was 184 PCU/g of carbon. Langmuir model is appropriate to describe the isotherm adsorption process in this study, with Qm: 476.2 PCU/g of carbon. The results of isotherm adsorption model evaluation, SEM photograph and FTIR analysis show that color adsorption occurred was physical adsoption.

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