Clinoptilolite augmented electrocoagulation process for the reduction of high‐strength ammonia and color from stabilized landfill leachate

Abstract

The high-strength leachate produced from sanitary landfill is a serious issue around the world as it poses adverse effects on aquatic life and human health. Physio-chemical technology is one of the promising options as the leachate normally presents in stabilized form and not fully amendable by biological treatment. In this research, the effectiveness of natural zeolite (clinoptilolite) augmented electrocoagulation process (hybrid system) for removing high-strength ammonia (3,442 mg/L) and color (8,427 Pt-Co) from naturally saline (15 ppt) local landfill leachate was investigated. A batch mode laboratory-scale reactor with parallel-monopolar aluminum electrodes attached to a direct current (DC) electric power was used as an electrocoagulation reactor for performance enhancement purpose. Optimum operational conditions of 146 g/L zeolite dosage, 600 A/m 2 current density, 60 min treatment time, 200 rpm stirring speed, 35 min settling duration, and pH 9 were recorded with up to 70% and 88% removals of ammonia and color, respectively. The estimated overall operational cost was 26.22 $/m 3. The biodegradability of the leachate had improved from 0.05 to 0.27 in all post-treatment processes. The findings revealed the ability of the hybrid process as a viable option in eliminating concentrated ammonia and color in natural saline landfill leachate. © 2020 Water Environment Federation • Practitioner points • Clinoptilolite was augmented on the electrocoagulation process in saline and stabilized landfill leachate (15 ppt). • The high strength NH 3-N (3,442 mg/L) and color (8,427 Pt-Co) were 70% and 88% removed, respectively. • The optimum conditions occurred at 140 g/L zeolite, 60 mA/cm 2 current density, 60 min, and final pH of 8.20. • The biodegradability of the leachate improved from 0.05 to 0.27 after the treatment. • This hybrid treatment was simple, faster, and did not require auxiliary electrolyte.

Digital Twin-Driven Performance Optimization for Hazardous Waste Landfill Systems

“…Relevant scholars put forward the graphic overlay method based on geographic information system based on the specific situation of the current postevaluation of the environmental impact of municipal facilities projects and selected relevant software as the research and development platform to conduct postevaluation of the environmental impact of municipal facility projects [6]. ey have selected nine evaluation factors, such as air quality, water environment quality, acoustic environment, soil environment, ecological environment, etc., determined their weights, and used the data processing function and spatial analysis function of the geographic information system to produce the impact level map.…”

Leachate treatment via electrocoagulation–coal‐based powdered activated carbon process: Efficiencies, mechanisms, kinetics, and costs

“…In order to treat landfill leachate, a number of traditional chemical and physical processes have been suggested, such as adsorption with different adsorbent (Detho et al, 2021; Elgarahy et al, 2023; Kumara & Dayanthi, 2023; J. Liu et al, 2024; Salama et al, 2022), ion exchange with various resins (Aziz et al, 2020; Bashir et al, 2010; Scandelai et al, 2020), reverse osmosis (Bouchareb et al, 2022; Folino et al, 2024; García‐Pacheco et al, 2022), electrocoagulation (Guo et al, 2022; Hamid et al, 2021; R. Li et al, 2017; Ogedey & Oguz, 2024), electrochemical oxidation (Tang et al, 2022; Vocciante et al, 2021; Zhao & Zhao, 2021), fenton processes (Crispim et al, 2022; Feng et al, 2022; X. Li et al, 2018), advanced oxidation processes (Kanmani & Dileepan, 2023, Shuo Li et al, 2022, Y. Liu et al, 2022), dissolved air flotation (Adlan et al, 2011), and coagulation/flocculation (Lessoued et al, 2017; Reddy et al, 2022; Zakaria et al, 2022).…”

Development of Hybrid Systems by Integrating an Adsorption Process with Natural Zeolite and/or Palygorskite into the Electrocoagulation Treatment of Sanitary Landfill Leachate

“…Despite the high efficiency and reliability of the EC process, some recalcitrant pollutants remain in the leachate after EC treatment, such as organic substances and NH 3 -N [24,[32][33][34][35]. From the literature, it can be inferred that no single procedure, including EC, is effective for the treatment of leachate [5,36] due to the complexity of its composition, and therefore combined systems are essential to address environmental restrictions [8,37].…”