Industrial solid waste landfill leachate treatment using electrocoagulation and biological methods

Dheeravath, Bhagawan; Poodari, Saritha; Chaitanya, N.; Ravi, Surya; Rani, Yamuna M.; Himabindu, V.; Vidyavathi, S.

doi:10.5004/dwt.2017.20335

Cited by 28 publications

(15 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Municipal solid waste (MSW) generation is increasing due to population growth, the modification of lifestyles and increased industrialization all around the world. Even landfilling is the last waste-management option; this option is still necessary for the disposal of non-recyclable materials; it has been extensively used extensively in the past due to its simplicity and lower management cost [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

Treatment of a Mature Landfill Leachate: Comparison between Homogeneous and Heterogeneous Photo-Fenton with Different Pretreatments

Tejera

Miranda

Hermosilla

et al. 2019

Water

View full text Add to dashboard Cite

This study focuses on the treatment of a mature landfill leachate by coagulation and photo-Fenton at different conditions. Optimal coagulation is carried out with ferric chloride in acid conditions; and with alum in near-neutral conditions, to minimize the use of sulphuric acid for pH adjustment (1 g/L vs. 7.2 g/L), the generation of sludge and the increase of conductivity in the final effluent. In both cases, a similar chemical oxygen demand (COD) removal is obtained, higher than 65%, which is high enough for a subsequent photo-Fenton treatment. However, the removal of absorbance at 254 nm (UV-254) was significantly higher with ferric chloride (83% vs. 55%), due to the important removal of humic acids at acid pH. The best results for coagulation are 2 g/L ferric chloride at initial pH = 5 and 5 g/L alum at initial pH = 7. After coagulation with ferric chloride, the final pH (2.8) is adequate for a homogeneous photo-Fenton using the remaining dissolved iron (250 mg/L). At these conditions, using a ratio H2O2/COD = 2.125 and 30 min contact time, the biodegradability increased from 0.03 to 0.51. On the other hand, the neutral pH after alum coagulation (6.7) allows the use of zero valent iron (ZVI) heterogeneous photo-Fenton. In this case, a final biodegradability of 0.32 was obtained, after 150 min, using the same H2O2/COD ratio. Both treatments achieved similar results, with a final COD, UV-254 and color removal greater than 90%. However, the economic assessment shows that the approach of ferric chloride + homogeneous photo-Fenton is much cheaper (6.4 €/m3 vs. 28.4 €/m3). Although the discharge limits are not achieved with the proposed combination of treatments, the significant increase of the pre-treated leachate biodegradability allows achieving the discharge limits after a conventional biological treatment such as sequencing batch reactor, which would slightly increase the total treatment cost.

show abstract

Section: Introductionmentioning

confidence: 99%

Treatment of a Mature Landfill Leachate: Comparison between Homogeneous and Heterogeneous Photo-Fenton with Different Pretreatments

Tejera

Miranda

Hermosilla

et al. 2019

Water

View full text Add to dashboard Cite

show abstract

“…Pesticide intermediate industrial waste water sample has been collected from pesticide intermediates industry located at Hyderabad, Telangana, India. The physicochemical characterization of wastewater samples has been carried out using "standard methods for the examination of water and wastewater 21st addition-2005, APHA" (Jotin et al 2012;Bhagawan et al 2017). The initial characterization of the sample has been given in Table 1.…”

Section: Waste Watermentioning

confidence: 99%

Treatment of pesticide intermediate industrial wastewater using hybrid methodologies

et al. 2021

View full text Add to dashboard Cite

Abatement of water pollution is being a major concern to be dealt with, as the scarcity of water for basic needs of human beings is increasing drastically. As a part of diminishing water pollution, treatment of industrial wastewater prior to disposal plays a paramount role. Due to the typical characteristics of pesticide, intermediate industrial waste water the treatment is also challenging issue. In this study three different sequential methodologies (Methodology-I: combined rotavapour distillation, fenton and anaerobic biological process, Methodology-II: combined rotavapour distillation, photo fenton and anaerobic biological process, Methodology-III combined coagulation, fenton, electro oxidation and anaerobic biological process) has been evaluated for the treatment of pesticide intermediate industrial wastewater. Among the three sequential methodologies opted in this study for the treatment of pesticide intermediate industrial wastewater, percentage removal of COD was 95% in methodology-1 (i.e. combined rotavapor distillation, fenton and anaerobic biological treatment).

show abstract

“…On further increase in the reaction time, no significant increase in the removal of COD and ammonia was observed. After 60 min, the formation of a passive layer on the electrodes may have occurred which reduces the effectiveness of electrooxidation [24][25].…”

Section: Electrooxidation Processmentioning

confidence: 99%

Sequential Treatment of Landfill Leachate By Advanced Oxidation Processes and Struvite Precipitation

lavudya

vodnala

Dheeravath

et al. 2021

Preprint

View full text Add to dashboard Cite

Landfill leachate contains organic, inorganic compounds, heavy metals, ammonia, and xenobiotic compounds which are considered unsafe for discharging into surface water which requires to be treated before its discharge into the water. In this paper, preliminary studies are reported on the application of Fenton, Struvite, and Electrooxidation processes for the removal of Chemical Oxygen Demand (COD) and ammonia from landfill leachate. Various operational parameters like pH, dosage, reaction time, and applied voltage were optimized in laboratory batch experiments and evaluated for removal of COD and ammonia. Results demonstrated that the Fenton process could effectively remove COD and ammonia by 75% and 23% respectively at 210 min for Fe+2:H2O2: 1:5 at a fixed pH 3. The Struvite process has been effective in the removal of ammonia by 74% at pH 9 with the dosage of Mg+2:PO43-:NH4+ at 1:1:1 ratio. Results from Electrooxidation for COD and ammonia were observed as 58.25% and 44% respectively at the applied voltage 8 V for a reaction time of 60 min. The efficiency of treatment processes was also evaluated in Sequential processes for COD and ammonia i.e., Sequence-I (Fenton-Electrooxidation-Struvite) and Sequence-II (Fenton-Struvite) at pre-optimized conditions. The sequential processes have been depicted, the removal efficiencies of COD and ammonia of 89% and 82% by Sequence-I; 76.77%, and 77% by Sequence-II respectively. The present study demonstrates that Fenton followed by Electrooxidation and Struvite is an effective treatment process that can enhance the treatment of landfill leachate.

show abstract

Industrial solid waste landfill leachate treatment using electrocoagulation and biological methods

Cited by 28 publications

References 13 publications

Treatment of a Mature Landfill Leachate: Comparison between Homogeneous and Heterogeneous Photo-Fenton with Different Pretreatments

Treatment of a Mature Landfill Leachate: Comparison between Homogeneous and Heterogeneous Photo-Fenton with Different Pretreatments

Treatment of pesticide intermediate industrial wastewater using hybrid methodologies

Sequential Treatment of Landfill Leachate By Advanced Oxidation Processes and Struvite Precipitation

Contact Info

Product

Resources

About