Landfill leachate treatment using the sequencing batch biofilm reactor method integrated with the electro-Fenton process

2014 ◽  
Vol 68 (6) ◽  
Author(s):  
Dao-Bin Zhang ◽  
Xiao-Gang Wu ◽  
Yi-Si Wang ◽  
Hui Zhang
Keyword(s):  
Landfill Leachate ◽  
Oxygen Demand ◽  
Ammonia Nitrogen ◽  
Biological Oxygen Demand ◽  
Biofilm Reactor ◽  
Electrolysis Time ◽  
Fenton Process ◽  
Optimal Conditions ◽  
Leachate Treatment ◽  
Sequencing Batch Biofilm Reactor

AbstractA study was conducted on the treatment of landfill leachate by combining the sequencing batch biofilm reactor (SBBR) method with the electro-Fenton method. The reduction of chemical oxygen demand (COD), biological oxygen demand (BOD5), and ammonia nitrogen (NH4+-N) from the leachate by the SBBR method was investigated. For the electro-Fenton experiment, the changes in COD and total organic carbon (TOC) with the increase in H2O2 dosage and electrolysis time under optimal conditions were also analysed. The results showed that the average efficiencies of reduction of COD, BOD5, and NH4+ -N achieved using the SBBR method were 21.6 %, 54.7 %, and 56.1 %, respectively. The bio-effluent was degraded by the subsequent electro-Fenton process, which was rapid over the first 30 min then subsequently slowed. After 60 min of the electro-Fenton treatment, the efficiencies of reduction of TOC, COD, and BOD5 were 40.5 %, 71.6 %, and 61.0 %, respectively. There is a good correlation between the absorbance of leachate at 254 nm (UV254) and COD or TOC during the electro-Fenton treatment.

scholarly journals The comparison of efficiency of Fenton and photo-Fenton treatment of stabilised landfill leachate / Porównanie efektywności oczyszczania odcieków z ustabilizowanego składowiska odpadów komunalnych w procesie Fentona i foto-Fentona

2015 ◽  
Vol 26 (3) ◽  
pp. 49-53 ◽  
Author(s):  
Anna Kwarciak-Kozłowska ◽  
Aleksandra Krzywicka
Keyword(s):  
Landfill Leachate ◽  
Fenton Reaction ◽  
Ferrous Sulphate ◽  
Oxygen Demand ◽  
Ammonia Nitrogen ◽  
Ammonia Removal ◽  
Mass Ratio ◽  
Leachate Treatment ◽  
Initial Ph ◽  
Removal Efficiencies

Abstract The goal of this article was to compare the efficiency of Fenton and photo-Fenton reaction used for stabilised landfill leachate treatment. The mass ratio of COD:H2O2 was fixed to 1:2 for every stages. The dose of reagents (ferrous sulphate/hydrogen peroxide) was different and ranged from 0.1 to 0.5. To determine the efficiency of treatment, the BOD (biochemical oxygen demand COD (chemical oxygen demand), TOC (total organic carbon) , ammonia nitrogen and BOD/COD ratio was measured. The experiment was carried out under the following conditions: temperature was 25ºC, the initial pH was adjusted to 3.0. Every processes were lasting 60 minutes. The most appropriate dose of reagents was 0.25 (Fe2+/H2O2). It was found that the application of UV contributed to increase of COD, TOC and ammonia removal efficiencies by an average of 14%.

Effects of ion exchange resins in different mobile ion forms on semi-aerobic landfill leachate treatment

2010 ◽  
Vol 61 (3) ◽  
pp. 641-649 ◽  
Author(s):  
Mohammed J. K. Bashir ◽  
Hamidi Abdul Aziz ◽  
Mohd Suffian Yusoff ◽  
A. A. M. Huqe ◽  
Soraya Mohajeri
Keyword(s):  
Ion Exchange ◽  
Landfill Leachate ◽  
Oxygen Demand ◽  
Ammonia Nitrogen ◽  
Ion Exchange Resins ◽  
Leachate Treatment ◽  
Cationic Resin ◽  
Exchange Resins ◽  
Sodium Form ◽  
Cationic Exchanger

Landfill leachate is one of the major contamination sources. In this study, the ability of synthetic ion exchange resins which carry different mobile ion for removing color, chemical oxygen demand (COD), and ammonia nitrogen (NH3-N) from stabilized leachate was investigated. The synthetic resin INDION 225 Na as a cationic exchanger and INDION FFIP MB as an anionic exchanger were used in this study. INDION 225 Na was used in hydrogen form (H+) and in sodium form (Na+), while INDION FFIP MB resin was used in hydroxide form (OH−) and in calcium form (Cl−) form. The results indicated better removal of color, COD and NH3-N by using INDION 225 Na in H+ as compared with Na+ form, while no performance differences were observed by using INDION FFIP MB in OH− or Cl− form. Applying cationic resin followed by anionic resin achieved 97, 88 and 94, percent removal of color, COD and NH3-N. The residual amounts were 160 Pt-Co, 290 mg/L and 110 mg/L of color, COD and NH3-N respectively.

scholarly journals Molecular weight distribution of pollutants in leachate from full scale landfill site

2016 ◽  
Vol 18 (2) ◽  
pp. 360-370
Keyword(s):  
Molecular Weight ◽  
Molecular Weight Distribution ◽  
Landfill Leachate ◽  
Weight Distribution ◽  
Oxygen Demand ◽  
Ammonia Nitrogen ◽  
Treatment Technology ◽  
Leachate Treatment ◽  
Treatment Processes ◽  
Appropriate Treatment

<div> <p>The main objective of this study was to investigate the differences between the main pollutants in young and intermediate age landfill leachate in terms of molecular weight distribution (MWD). Parameters of chemical oxygen demand (COD), five day - biochemical oxygen demand (BOD<sub>5</sub>), ultraviolet-visible spectrophotometry (UV-VIS spectrum), total kjehldahl nitrogen (TKN), ammonia nitrogen (NH<sub>4</sub>-N) and colour were fractioned by membranes with the nominal pore size of 1&micro;m, 0.05 &micro;m, 100 kDa, 50 kDa, 10 kDa, 1 kDa and 0.5 kDa. According to the MWD results appropriate treatment technology could be choosen easily. According to the MWD results the ratio of soluble fractions (&lt; 0.5 kDa) to total COD was 34% in young leachate (YL), whereas low molecular weight (MW) fractions were dominant in intermediate leachate (IL) having this ratio of 71%. Presence of lower MW compounds in IL was also confirmed with UV-VIS absorbance spectra and its spectrum was higher than the YL. According to the specific ultraviolet absorption (SUVA) values, the organic contents of all of these processes were hydrophilic. TKN and NH<sub>4</sub>-N analysis showed that in IL all the nitrogen present is in ammoniacal form, instead in YL there is still the presence of organic nitrogen. Furthermore more than half of the TKN was less than 0.5 kDa while 6 % and 16 % TKN found in wastewater from IL and YL was higher than 1 &micro;m respectively. The observations of this study may provide useful criteria to choose a suitable landfill leachate treatment processes.</p> </div> <p>&nbsp;</p>

scholarly journals Electrocoagulation Treatment for Removal of Color and Chemical Oxygen Demand in Landfill Leachate using Aluminum Electrode

2019 ◽  
Vol 8 (4) ◽  
pp. 89-92
Keyword(s):  
Chemical Oxygen Demand ◽  
Landfill Leachate ◽  
Applied Voltage ◽  
Research Work ◽  
Oxygen Demand ◽  
Experimental Result ◽  
Aluminum Electrode ◽  
Electrolysis Time ◽  
Leachate Treatment ◽  
Electrode Distance

The present research work mainly deals with the removal percentage of Color and Chemical Oxygen Demand (COD) on landfill leachate by using electrocoagulation (EC) process. An EC process was carried out with an aluminium electrode and it act as both anode and cathode. The study mainly targets the factors affecting on electrode material, electrolysis time, initial pH, applied voltage, inter-electrode distance. The experimental result reveals that there was raise in BOD/COD ratio from 0.11 to 0.66 and the maximum percentage removal achieved were COD and Color 78.4% and 77.0% respectively. The optimum inter-electrode distance 1cm with electrode surface area 35 cm2 and optimum electrolysis time of 90 min at optimum applied voltage 10V, stirring speed 250 rpm and pH is 9.3. These results showed that the EC process is appropriate and well-organized approach for the landfill leachate treatment.

Integration of US/Fe2+ and photo-Fenton in sequencing for degradation of landfill leachate

2015 ◽  
Vol 73 (2) ◽  
pp. 260-266 ◽  
Author(s):  
F. G. Zha ◽  
D. X. Yao ◽  
Y. B. Hu ◽  
L. M. Gao ◽  
X. M. Wang
Keyword(s):  
Removal Efficiency ◽  
Landfill Leachate ◽  
Oxygen Demand ◽  
Gas Chromatography Mass Spectrometry ◽  
Fenton Process ◽  
Optimal Conditions ◽  
Initial Concentration ◽  
Toc Removal ◽  
The Us ◽  
Initial Ph

The landfill leachate treated by sonication in presence of Fe2+ (US/Fe2+) and then by photo-Fenton achieved the highest total organic carbon (TOC) removal efficiency among the screened processes. The lower initial pH, dosage of Fe2+ and initial concentration of leachate were helpful in raising TOC removal efficiency of leachate by US/Fe2+. The optimal conditions for the US-photo-Fenton process were as follows: initial pH at 3.0, [H2O2]/[TOC0] at 2, [H2O2]/[Fe2+] at 5 and initial concentration of landfill leachate at 600 mg/L. The removal efficiency of TOC, chemical oxygen demand (COD) and 5-day biochemical oxygen demand (BOD5) were 68.3, 79.6 and 58.2%, while the BOD5/COD rose from 0.20 to 0.43 at optimum condition. Based on gas chromatography–mass spectrometry (GC-MS) results, 36 of a total of 56 pollutants were completely degraded by US-photo-Fenton treatment.

scholarly journals The performance and associated mechanisms of carbon transformation (PHAs, polyhydroxyalkanoates) and nitrogen removal for landfill leachate treatment in a sequencing batch biofilm reactor (SBBR)

RSC Advances ◽  
2018 ◽  
Vol 8 (74) ◽  
pp. 42329-42336 ◽  
Author(s):  
Wenjun Yin ◽  
Kai Wang ◽  
Jingtao Xu ◽  
Daoji Wu ◽  
Congcong Zhao
Keyword(s):  
Nitrogen Removal ◽  
Landfill Leachate ◽  
Biofilm Reactor ◽  
Leachate Treatment ◽  
Sequencing Batch Biofilm Reactor

A modified sequencing batch biofilm reactor (SBBR, adding a pre-anoxic phase before the aeration phase) was used to treat landfill leachate.

Landfill leachate treatment by electrocoagulation: Effects of current density and electrolysis time

2020 ◽  
Vol 8 (5) ◽  
pp. 104368
Author(s):  
Neanderson Galvão ◽  
Jeanette Beber de Souza ◽  
Carlos Magno de Sousa Vidal
Keyword(s):  
Current Density ◽  
Landfill Leachate ◽  
Electrolysis Time ◽  
Leachate Treatment

Comparison of Luffa Cylindrical Sponge and Plastic Sponge as Carriers in Sequencing Batch Biofilm Reactor for Sewage Treatment

2012 ◽  
Vol 518-523 ◽  
pp. 2431-2438
Author(s):  
Ying Zhang Wang ◽  
Shang Hua Zhang ◽  
Chang Qing Pang ◽  
Jie Li
Keyword(s):  
Chemical Oxygen Demand ◽  
Sewage Treatment ◽  
Oxygen Demand ◽  
Suspended Solid ◽  
Biofilm Reactor ◽  
Environment Friendly ◽  
Sequencing Batch Biofilm Reactor ◽  
Removal Efficiencies

Luffa cylindrical sponge and plastic sponge were used as carriers in sequencing batch biofilm reactor (SBBR) for sewage treatment in this paper. The removals of suspended solid (SS), chemical oxygen demand (COD) and NH3-N in sewage were studied. The average removal efficiencies of SS, COD and NH3-N with luffa cylindrical sponge were 96%, 89% and 90%, respectively, while these with plastic sponge were 94%, 83% and 80%, respectively. As a natural, cheap and environment friendly biocarrier, luffa cylindrical sponge was easy to get a biofilm with enriched microbes during the first few days of sewage treatment. It was much more suitable as a carrier than the plastic sponge for SBBR.

Sign in / Sign up

Export Citation Format

Share Document