Municipal Landfill Leachate Treatment Using the Combined Action of Activated Carbon and Ozone

2013 ◽  
Vol 35 (1) ◽  
pp. 55-62 ◽  
Author(s):  
Franco Cataldo ◽  
Giancarlo Angelini
Keyword(s):  
Activated Carbon ◽  
Landfill Leachate ◽  
Leachate Treatment ◽  
Municipal Landfill ◽  
Combined Action

Anodic Oxidation of Effluents from Stages of MBR-UF Municipal Landfill Leachate Treatment Plant

2020 ◽  
Vol 37 (10) ◽  
pp. 702-714
Author(s):  
Zubeda Ukundimana ◽  
Mehmet Kobya ◽  
Philip Isaac Omwene ◽  
Erhan Gengec ◽  
Orhan Taner Can
Keyword(s):  
Anodic Oxidation ◽  
Landfill Leachate ◽  
Treatment Plant ◽  
Leachate Treatment ◽  
Municipal Landfill

Effects of mixed liquor pH on membrane fouling and micro-pollutant removals in membrane bioreactors for municipal landfill leachate treatment

2015 ◽  
Vol 72 (5) ◽  
pp. 770-778 ◽  
Author(s):  
Samunya Sanguanpak ◽  
Chart Chiemchaisri ◽  
Wilai Chiemchaisri ◽  
Kazuo Yamamoto
Keyword(s):  
Landfill Leachate ◽  
Membrane Fouling ◽  
Membrane Surface ◽  
Membrane Bioreactors ◽  
Leachate Treatment ◽  
Mixed Liquor ◽  
Municipal Landfill ◽  
Inorganic Substances ◽  
Ph Level ◽  
Ph Variations

This research investigated the membrane fouling and micro-pollutant removals in treatment of municipal landfill leachate at various pH levels (i.e. 5.5, 6.5, 7.5, and 8.5) using membrane bioreactors. The findings revealed that membrane fouling was influenced by the pH level of mixed liquor, with pH 5.5 exhibiting the most severe membrane fouling. At pH 5.5, proteins and carbohydrates were predominant in the membrane foulants, while at pH 8.5 humic-like and inorganic substances constituted the largest proportion of the foulants on the membrane surface. The removal efficiencies of micro-pollutants (bisphenol-A; 2,6-di-tert-butylphenol and 2,6-di-tert-butyl-4-methylbutylphenol) were nevertheless insignificantly influenced by the pH levels of mixed liquor. In addition, the removal rates of the compounds at pH 5.5 were slightly lower vis-à-vis at the higher pH levels. The micro-pollutant retention on the fouled membranes was also significant and highest under the mixed liquor pH of 8.5. Furthermore, the experiments demonstrated that the varying degrees of rejection by the fouled membranes could be attributed to the alteration of foulant characteristics as a result of the pH variations.

Treatment of landfill leachate - high tech or low tech? A case study

2004 ◽  
Vol 48 (11-12) ◽  
pp. 277-284 ◽  
Author(s):  
N. Schwarzenbeck ◽  
K. Leonhard ◽  
P.A. Wilderer
Keyword(s):  
Activated Carbon ◽  
Landfill Leachate ◽  
Cold Weather ◽  
High Tech ◽  
Individual Treatment ◽  
Leachate Treatment ◽  
Treatment Unit ◽  
Nitrite Production ◽  
Degradation Rates

At the sanitary landfill of the city of Penzberg (Germany), two diverse approaches to leachate treatment were studied as parts of a three-stage treatment concept. The performance of a simple aerobic pond was compared to that of an advanced multistage treatment unit, the latter comprising a membrane biological reactor and a two-stage activated carbon filter. For 274 days of the year (75%) the pond was able to provide sufficient treatment even under cold weather conditions. For temperatures lower than 5°C, a higher biomass content and temporal storage of the raw leachate (e.g. increasing hydraulic retention time) could close the gap of insufficient treatment. In contrast, the advanced treatment system could only accomplish limited treatment capabilities due to insufficient maintenance, low loading conditions and deficient coordination between the individual treatment steps. As a result, degradation rates were low and operational problems frequent. Limits for Ntot were exceeded regularly (Ntot,e = 60–70 mg/L), throughput broke down and excessive nitrite production occurred (NO2-Ne = 10 mg/L) as a result of microbial activity inside the activated carbon filters. This case study clearly suggests aerobic ponds as an appropriate solution for the treatment of landfill leachate in areas where operational independence is essential.

Treatment of landfill leachate by preozonation and adsorption in activated carbon columns

1996 ◽  
Vol 34 (9) ◽  
pp. 33-40 ◽  
Author(s):  
J. Fettig ◽  
H. Stapel ◽  
C. Steinert ◽  
M. Geiger
Keyword(s):  
Activated Carbon ◽  
Landfill Leachate ◽  
Fixed Bed ◽  
Breakthrough Curves ◽  
Operating Conditions ◽  
Practical Case ◽  
Leachate Treatment ◽  
Homogeneous Surface ◽  
Adsorption Processes ◽  
Cost Efficient

Landfill leachate pretreated in an aerobic biological stage was studied with respect to the adsorption behaviour of its organic components with and without preoxidation by different amounts of ozone. Isotherm data evaluated by adsorption analysis showed that the fractions of non-adsorbable and weakly adsorbable species had been increased after preoxidation. As a result, the carbon capacity in a fixed-bed adsorption process was expected to be significantly lower for preoxidized leachate. This conclusion was confirmed by data from column experiments. The breakthrough curves under operating conditions typical for leachate treatment could be predicted quite well by the homogeneous surface diffusion model when no preoxidation was applied. After preozonation about 40% of the remaining organic substances were biodegradable. Data evaluation revealed that biodegradation took place inside the activated carbon beds. Therefore the total removal of ozonated leachate in activated carbon columns will be higher than the removal due to adsorption processes. An economic analysis must show in any practical case whether a combination of preoxidation and adsorption will be more cost-efficient than either of the single processes. The modelling technique applied in this study can be a useful tool for that purpose.

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