Removal of Chemical Oxygen Demand, Nitrogen, and Heavy Metals Using a Sequenced Anaerobic-Aerobic Treatment of Landfill Leachates at 10-30°C

2003 ◽  
Vol 109 (1-3) ◽  
pp. 181-196 ◽  
Author(s):  
Sergey Kalyuzhnyi ◽  
Marina Gladchenko ◽  
Andrey Epov ◽  
Vasu Appanna
Keyword(s):  
Heavy Metals ◽  
Chemical Oxygen Demand ◽  
Oxygen Demand ◽  
Aerobic Treatment ◽  
Landfill Leachates

scholarly journals Phytoaccumulation of heavy metals from municipal solid waste leachate using different grasses under hydroponic condition

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Malik Muhammad Hassan ◽  
Noor Haleem ◽  
Muhammad Anwar Baig ◽  
Yousuf Jamal
Keyword(s):  
Heavy Metals ◽  
Electrical Conductivity ◽  
Municipal Solid Waste ◽  
Chemical Oxygen Demand ◽  
Solid Waste ◽  
Oxygen Demand ◽  
Elephant Grass ◽  
Vetiver Grass ◽  
Rhodes Grass ◽  
Waste Leachate

Abstract Grasses have been used widely to remediate contaminants present in domestic wastewater, but leachate generated from municipal solid waste that usually contain some concentrations of heavy metals has never been reported to be treated with grasses, especially Rhodes grass. A series of experiments was performed to investigate the contaminant uptake from municipal solid waste leachate by Chloris gayana (Rhodes grass) grown in combination with two commonly available grass varieties namely Vetiveria zizanioides (Vetiver grass) and Pennisetum purpureum (Elephant grass). Leachate used for the experiments had high values for chemical oxygen demand (5 g/L), pH (8.5), electrical conductivity (9.0 mS/cm), nitrates (182.1 mg/L), phosphates 6.4 mg/L along with heavy metals i.e. copper, zinc and manganese. Different dilutions of leachate ranging from 0 to 100% were applied in batches and their result showed that collectively all the grasses reduced overall contaminant concentrations. These were reported for chemical oxygen demand, electrical conductivity, nitrates, and phosphates reduced up to 67, 94, 94, and 73%, respectively. Metals uptake by grasses also showed a significant decrease in applied dose i.e. zinc (97%), copper (89%), and manganese (89%). Plant analysis showed that all grasses showed preference to heavy metals uptake e.g. Rhodes grass favoured up taking zinc, Elephant grass for copper and Vetiver grass preferred manganese. Overall growth performance of Rhodes grass was better in dilute leachate, whereas in more concentrated leachate, Rhodes grass did not perform better and production of biomass decreased. In Vetiver grass, root and shoot lengths decreased with increasing leachate strength, but the biomass did not change significantly.

scholarly journals Evaluation of Organic Loading Rate and Chemical Oxygen Demand Removal: A Coupled Anaerobic-aerobic Treatment Approach for Molasses Distillery Stillage Treatment

2020 ◽  
Author(s):  
Getachew D. Gebreeyessus ◽  
Andualem Mekonnen ◽  
Yonas Chebude ◽  
Asaithambi Perumal ◽  
Esayas Alemayehu
Keyword(s):  
Chemical Oxygen Demand ◽  
Sustainable Management ◽  
Loading Rate ◽  
Treatment Approach ◽  
Oxygen Demand ◽  
Complete Removal ◽  
Organic Loading Rate ◽  
Aerobic Treatment ◽  
Organic Loading ◽  
Promising Technique

Abstract The objective of the current study is to determine the optimum organic loading rate for a continuous anaerobic digestion (AD) of an ethanol distillery stillage with and without of feed pretreatment. The AD has been performed in scoria packed continuous reactors. The pretreatment of the molasses ethanol distillery stillage brought a significantly better chemical oxygen demand (COD) removal with an increased loading rate to 2000 mg/L-d, when compared with the raw. The results obtained also showed a complete removal of the BOD, which was realized after applying the coupling of AD and aerobic treatments. During aerobic treatment, 68% of the organics were removed within eight hours of retention time. Despite the persistence of color, the removal of organics from integrating the wet air pretreatment, continuous AD and aerobic remediations appear to be promising technique towards the sustainable management of stillage thereby meeting discharge limits.

scholarly journals THE EFFICIENCY OF CHARCOAL AS A FILTER MEDIA IN NON-VEGETATION CONSTRUCTED WETLAND SUBSURFACE-FLOW SYSTEM (SF) FOR AMMONIA, CHEMICAL OXYGEN DEMAND, AND IRON TREATMENT OF LANDFILL LEACHATES

2010 ◽  
Vol 3 (3) ◽  
pp. 135-140
Author(s):  
Ahmad Md. Noor ◽  
Pedy Artsanti ◽  
P.E. Lim ◽  
S. Suryani ◽  
H.P.S Abdul Khalil
Keyword(s):  
Chemical Oxygen Demand ◽  
Flow System ◽  
Oxygen Demand ◽  
Filter Media ◽  
Landfill Leachates ◽  
Standard Methods ◽  
Iron Treatment ◽  
Overall Performance ◽  
Set Up ◽  
Better Than

The thermal Charcoal for domestic used was crushed into powder and mixed with gravel. Four reactors of different proportion and size of charcoal and gravel were set up without vegetation. Sample of landfill leachates obtained from site of Pulau Burung Landfill, Penang, was introduced into the reactors. Ammonia, chemical oxygen demand (COD), and iron of inlet and outlet from four reactors were analyzed by standard methods. Result shows that overall performance of removing ammonia and iron were much better than COD.   Keywords: charcoal, leachate, filter media

scholarly journals THE "CHEMICAL OXYGEN DEMAND / TOTAL VOLATILE ACIDS" RATIO AS AN ANAEROBIC TREATABILITY INDICATOR FOR LANDFILL LEACHATES

2015 ◽  
Vol 32 (1) ◽  
pp. 73-86 ◽  
Author(s):  
R. C. Contrera ◽  
K. C. da Cruz Silva ◽  
G. H. Ribeiro Silva ◽  
D. M. Morita ◽  
M. Zaiat ◽  
...  
Keyword(s):  
Chemical Oxygen Demand ◽  
Oxygen Demand ◽  
Total Volatile ◽  
Landfill Leachates

Characterization of Landfill Leachates by Molecular Size Distribution, Biodegradability, and Inert Chemical Oxygen Demand

2009 ◽  
Vol 81 (5) ◽  
pp. 499-505 ◽  
Author(s):  
Míriam C. S. Amaral ◽  
Cynthia F. A. Ferreira ◽  
Liséte Celina Lange ◽  
Sérgio F. Aquino
Keyword(s):  
Chemical Oxygen Demand ◽  
Size Distribution ◽  
Oxygen Demand ◽  
Molecular Size ◽  
Landfill Leachates ◽  
Molecular Size Distribution

scholarly journals Phytoremediation of landfill leachate using Ipomoea aquatica and Pistia stratiotes

2021 ◽  
Vol 42 (3(SI)) ◽  
pp. 775-781
Author(s):  
M.M. Hanafiah ◽  
◽  
N.I.H.A. Aziz ◽  
A.A. Halim ◽  
L.S. Shamdin ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Chemical Oxygen Demand ◽  
Landfill Leachate ◽  
Suspended Solids ◽  
Oxygen Demand ◽  
Total Suspended Solids ◽  
Pistia Stratiotes ◽  
Ipomoea Aquatica ◽  
Physico Chemical ◽  
Significant Difference

Aim: In this study, Ipomoea aquatica and Pistia stratiotes were used to remove total suspended solids, chemical oxygen demand and ammoniacal nitrogen (NH3-N) from the landfill leachate collected at Ampar Tenang Closed Landfill (ATCL) site in Dengkil, Selangor, Malaysia. Methodology: The physico-chemical characteristics of landfill leachate (pH, temperature, NH3-N, dissolved oxygen, biochemical oxygen demand, chemical oxygen demand, total dissolved solids, total suspended solids, salinity, electrical conductivity and nitrite as well as selected heavy metals were determined before phytoremediation treatment. Results: The physico-chemical properties of leachate samples were found to be lower as compared to the standards set by the government, except for COD (>100 mg l-1). Heavy metals content, Na, Mg and Fe was high in leachate. It was found that the concentrations of NH3-N, COD and TSS in leachate decreased by 57.64%, 26.85% and 62.05% after treatment with Ipomea aquatica, respectively. Whereas, 61%, 32% and 74.7% removal rate was observed for NH3-N, COD and TSS, post-treatment by Pistia stratiotes. One-way ANOVA analysis for Ipomoea aquatica revealed insignificant difference (p>0.05) but for Pistia stratiotes there was a significant difference (p<0.05) in the reduction of TSS, COD and NH3-N concentrations. Interpretation: Based on the findings, Pistia stratiotes was found more effective than Ipomea aquatica for reducing TSS, COD and NH3-N concentrations from landfill leachate.

Coupled anaerobic–aerobic treatment of whey wastewater in a sequencing batch reactor: proof of concept

2007 ◽  
Vol 55 (10) ◽  
pp. 201-208 ◽  
Author(s):  
J.C. Frigon ◽  
T. Bruneau ◽  
R. Moletta ◽  
S.R. Guiot
Keyword(s):  
Chemical Oxygen Demand ◽  
Sequencing Batch Reactor ◽  
Batch Reactor ◽  
Oxygen Demand ◽  
Anaerobic Digester ◽  
Aerobic Treatment ◽  
Proof Of Concept ◽  
Ph Shock ◽  
Soluble Chemical Oxygen Demand ◽  
Different Levels

A proof of concept was performed in order to verify if the coupling of anaerobic and aerobic conditions inside the same digester could efficiently treat a reconstituted whey wastewater at 21 °C. The sequencing batch reactor (SBR) cycles combined initial anaerobic phase and final aerobic phase with reduced aeration. A series of 24 h cycles in 0.5 L digesters, with four different levels of oxygenation (none, 54, 108 and 182 mgO2 per gram of chemical oxygen demand (COD)), showed residual soluble chemical oxygen demand (sCOD) of 683±46, 720±33, 581±45, 1,239±15 mg L−1, respectively. Acetate and hydrogen specific activities were maintained for the anaerobic digester, but decreased by 10–25% for the acetate and by 20–50% for the hydrogen, in the coupled digesters. The experiment was repeated using 48 h cycles with limited aeration during 6 or 16 hours at 54 and 108 mgO2gCOD−1initial, displaying residual sCOD of 177±43, 137±38, 104±22 and 112±9 mg L−1 for the anaerobic and the coupled digesters, respectively. The coupled digesters recovered after a pH shock with residual sCOD as low as 132 mg L−1 compared to 636 mg L−1 for the anaerobic digester. With regard to the obtained results, the feasibility of the anaerobic- aerobic coupling in SBR digesters for the treatment of whey wastewater was demonstrated.

scholarly journals Removal of chemical oxygen demand (COD) and heavy metals by catalytic ozonation–microbial fuel cell and Acidithiobacillus ferrooxidans leaching in flotation wastewater (FW)

2019 ◽  
Vol 79 (12) ◽  
pp. 2328-2336 ◽  
Author(s):  
Zhenzhong Bian ◽  
Yali Feng ◽  
Haoran Li ◽  
Zhuwei Du
Keyword(s):  
Heavy Metals ◽  
Fuel Cell ◽  
Chemical Oxygen Demand ◽  
Microbial Fuel Cell ◽  
Acidithiobacillus Ferrooxidans ◽  
Platinum Catalyst ◽  
Oxygen Demand ◽  
Catalytic Ozonation ◽  
Standard Chinese ◽  
Leaching Parameters

Abstract A catalytic ozonation–microbial fuel cell and Acidithiobacillus ferrooxidans leaching process was used in treating flotation wastewater to remove chemical oxygen demand (COD) and heavy metals in this study. The results indicated that when adding 1 g/L of manganese/modified activated carbon catalyst and 1.5 g/min ozone flow, the COD could be degraded from 2,043.67 mg/L to 711.4 mg/L. After that, the COD could continue decreasing down to 72.56 mg/L through an air-cathode single chamber microbial fuel cell (SCMFCs), coated with 0.4 mg/cm2 platinum catalyst, after 15 days. Meanwhile, the maximum voltages and the ultimate power density of the SCMFCs reached 378.96 mV and 7,608.35 mW/m2, respectively. For filter residue, when 1.2 g/L Fe3+, 10% (m/v) filter residue, and 10% Acidithiobacillus ferrooxidans were added, the copper leaching rate could reach 92.69% after 7 days if the pH values were adjusted to 1.9. Furthermore, the other heavy metals were also decreased to a level lower than the pollution control standard (Chinese standard GB3838-2002). The leaching parameters in terms of pH, redox potential, and cyclic voltammetry showed that the addition of an appropriate concentration of Fe3+ to the leaching systems was beneficial to copper dissolution.

scholarly journals Assessment of Drain Water Used for Irrigation in the Delhi Region

2020 ◽  
Vol 10 (26) ◽  
pp. 200610 ◽  
Author(s):  
Deepak Gola ◽  
Arghya Bhattacharya ◽  
Priyadarshini Dey ◽  
Anushree Malik ◽  
Shaikh Ziauddin Ahammad
Keyword(s):  
Heavy Metals ◽  
Electrical Conductivity ◽  
Heavy Metal ◽  
Dissolved Oxygen ◽  
Chemical Oxygen Demand ◽  
Human Health ◽  
Oxygen Demand ◽  
Drain Water ◽  
Physico Chemical ◽  
Multiple Heavy Metals

Background. Industries such as electroplating, mining and battery production are major sources of heavy metal-rich waste entering nearby water bodies. Irrigation with heavy metal contaminated water can deteriorate soil quality as well as agricultural produce and have further toxic effects on human health. Objectives. The objective of the present study was to estimate the concentration of hazardous heavy metals such as chromium (Cr), cadmium (Cd), copper (Cu), nickel (Ni), zinc (Zn) and lead (Pb), as well as physico-chemical variables (pH, electrical conductivity, total dissolved solids, chemical oxygen demand and dissolved oxygen) at sampling locations along the Najafgarh and Loha mandi drains in Delhi, National Capital Region, India. Methods. The present study evaluated the quality of wastewater from the Najafgarh and Loha mandi drains, which are used for irrigational purposes in the Delhi region. Drain water quality was monitored for a period of 2 years for physico-chemical variables (pH, chemical oxygen demand, electrical conductivity and dissolved oxygen) as well as heavy metal concentrations (Cr, Cu, Cd, Zn, Ni and Pb). The two-year monitoring period (July 2012–March 2014) was chosen to represent three seasons: pre-monsoon, monsoon, and post-monsoon. Results. Varied concentrations of multiple heavy metals were found due to the extensive discharge of untreated industrial effluents into the drain water. Punjabi Bagh of Najafgarh drain was the most contaminated sampling site with the maximum concentration of Zn (12.040 ± 0.361 mg L−1), followed by Cr (2.436 ± 0.073mg L−1) and Cu (2.617 ± 0.078 mg L−1). Conclusions. Consumption of heavy metal-contaminated agricultural products can cause deleterious human health effects, leading to further health problems. The presence of multi-heavy metal ions above the Food and Agriculture Organization of the United Nations (FAO) permissible limits indicated that drain water was not suitable for irrigational purposes, and adequate measures are required to remove the heavy metal load from drain water. Competing Interests. The authors declare no competing financial interests.

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