Techniques for pollutant removal, nutrient recovery, and energy production from landfill leachates: a review

Environmental Chemistry Letters, Год журнала: 2025, Номер unknown

Опубликована: Янв. 22, 2025

Язык: Английский

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Treatment of landfill leachate wastewater by chemical coagulation‐flocculation, electro‐membrane bioreactor, and anaerobic hybrid system

Water Environment Research, Год журнала: 2025, Номер 97(2)

Опубликована: Фев. 1, 2025

In this study, the treatment of landfill leachate wastewater by chemical coagulation, an electro-membrane bioreactor (e-MBR), and anaerobic hybrid system was studied. First, coagulation process applied to wastewater, which is referred their high organic pollutants. Aluminum sulfate (alum), poly aluminum chloride (PAC), ferric (FeCl3), ferrous (FeSO4) were used as coagulants. After determining coagulant type, pH optimization (6-10) amount (0.5-2.5 g/l) optimized. coagulation-flocculation experiments, optimum conditions determined 1.0 g/l alum at 9. At these conditions, oxygen demand (COD), total phenolic contents (TPC), color analyses examined 31.16%, 35.32%, 24.42% removal efficiencies obtained, respectively. pretreatment, e-MBR obtain further treatment. Iron (Fe) electrode ultrafiltration membrane (UP150) in system. 5, 10, 20 V electric current time-dependent flux measurements carried out. COD, TPC, performed both mixed liquor permeate. The results indicated that over ˃90% efficiency for achieved when increased from 5 V. addition, it also observed fouling decreased increased. Since still did not meet discharge criteria, obtained subjected 10 days incubation, found be 99.25%, 100%, 99.57%, PRACTIONER POINTS: bioreactor, Optimum 1 9 coagulation. It color, TPC 99.5%, 99.6%,

Язык: Английский

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Exploring Mechanistic Insights Into Coagulation-flocculation-aided Adsorption Design: a Comprehensive Study On the Removal of Toxic Metals and Organic Pollutants From Vegetable Oil Processing Wastewater

Environmental Monitoring and Assessment, Год журнала: 2025, Номер 197(3)

Опубликована: Фев. 17, 2025

Язык: Английский

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Efficient Removal of Cyanobacteria Using Integrated Electrocoagulation-Flotation and Moringa Seed Coagulant: Optimization via Response Surface Methodology (RSM)

Water Conservation Science and Engineering, Год журнала: 2025, Номер 10(2)

Опубликована: Май 8, 2025

Язык: Английский

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Adaptive optimization of natural coagulants using hybrid machine learning approach for sustainable water treatment

Scientific Reports, Год журнала: 2025, Номер 15(1)

Опубликована: Май 8, 2025

The efficiency optimization methods for natural coagulants are often restricted due to non-scientific trial-and-error approaches. They inaccurate in predicting the complex interactions of jet mixing parameters, coagulant dosage, and environmental conditions. To overcome these obstacles, this research paper proposes advanced hybrid models machine learning enhance flocculation efficiency. We use CatBoost model with NTK learn intricate nonlinear among velocity, time, dose, pH, turbidity. is effective dealing categorical data like diverse coagulants. Meanwhile, boosts model's generalization capability, especially when sample size becomes small or experimental datasets applied. Lastly, SOMs MARS used identify pattern recognitions tracing crucial interaction parameters. Reinforcement techniques-that include DDPG SAC dynamic dosage-optimize real time. Utilizing NAS Hyperband automate tuning, timestamp was reduced by 40%. proposed heavily improve process 20-25% allow a good predictive accuracy 95-97%. Paramount, however, that has interpretability properties assured SHAP counterfactual explanations, which would give actionable insights into most influencing factors on flocculation. This work represents substantial advancement discipline since it introduces robust, interpretable, real-time offer practical tool through improvement water treatment processes be made both sustainable efficient.

Язык: Английский

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Optimization of calcined eggshell as an effective coagulant for treating colloidal particles in complex effluents in the CPCP industry: mechanistic insights, scale-up design, and comparative analysis with alum

Chemical Engineering Communications, Год журнала: 2024, Номер 211(12), С. 1842 - 1863

Опубликована: Авг. 12, 2024

Highly turbid industrial effluent poses significant challenges to environmental sustainability. In this study, we investigated the optimal aggregation kinetics for removal of colloidal and particles in Cosmetics Personal Care Products (CPCP) using calcined eggshell (CES) industrial-grade aluminum sulfate as flocculants. The characteristics were determined following ASTM specifications, process optimization was carried out a response surface design approach. operating conditions at settling time 3 min found be pH 8, 0.2 g/L dosage CES, 10, 0.3 alum dosage. flocculation efficiencies CES 80% 78%, respectively, demonstrating effectiveness both flocculants removing reducing turbidity CPCP effluent. Mechanistic studies revealed that achieved particle through enmeshment inter-particle bridging with rate (1.3 × 10−7) lower floc breakup tendency (2.8 10−14) compared alum-sweep flocculation. hydrodynamics velocity gradient 269s−1 ≤ G 29s−1 indicated spontaneous agglomeration within period ≤10 min, indicating rapid efficient removal. findings study justify use sustainable effective option colloid/turbid from optimized mechanistic insights into contribute establishing an sedimentation geometry, specified aspect ratio, detention time, hypothetical settling, sludge depth ensuring favorable stability finished before discharge.

Язык: Английский

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Optimization, Kinetics and Thermodynamic Modeling of Pulp Production from Plantain stem using the Kraft Process

Cleaner Chemical Engineering, Год журнала: 2024, Номер unknown, С. 100129 - 100129

Опубликована: Ноя. 1, 2024

Язык: Английский

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