Biochar integrated reactive filtration of wastewater for P removal and recovery, micropollutant catalytic oxidation, and negative CO₂e: Process operation and mechanism

Water Environment Research, Journal Year: 2023, Volume and Issue: 95(9)

Published: Sept. 1, 2023

Biochar (BC) use in water treatment is a promising approach that can simultaneously help address societal needs of clean water, food security, and climate change mitigation. However, novel BC technology approaches require operational testing field pilot-scale scenarios to advance their readiness assessment. Therefore, the objective this study evaluate system performance integrated into hydrous ferric oxide reactive filtration (Fe-BC-RF) with without catalytic ozonation (CatOx) process laboratory scenarios. For investigation, Fe-BC-RF Fe-CatOx-BC-RF trials were conducted on synthetic lake variants at three municipal resource recovery facilities (WRRFs) flows 0.05 0.6 L/s, respectively. Three native two iron-modified BCs used these studies. The commercially available (Fe-RF BC) had 96%-98% total phosphorus (TP) removal from 0.075- 0.22-mg/L TP, as orthophosphate influent trials. With integration, yielded 94%-98% same process-influent conditions. In WRRF studies, removed 84%-99% concentrations varied 0.12 8.1 mg/L. Nutrient analysis showed recovered studies an increase TP its concentration, Fe-amended showing better P 110% than unmodified state, which was 16%. Lastly, successful destructive removals >90% for more 20 detected micropollutants, thus addressing critical human health environmental quality concern. research demonstrated integration Fe-CatOx-RF micropollutant removal, disinfection, nutrient encouraging tertiary sustainable recycling potential carbon-negative operation. PRACTITIONER POINTS: A sand integrating biochar injection typically yields ultralow levels. Biochar, modified iron, recovers wastewater, creating P/N upcycled soil amendment. Addition ozone stream enables biochar-iron-ozone oxidation demonstrating excellent (>90%) compounds tested. companion paper work explores life cycle assessment (LCA) techno-economic (TEA) explore impacts, costs, readiness. aid long-term carbon sequestration by reducing footprint advanced dose-dependent manner, including enabling overall process.

Language: Английский

Biochar‐integrated reactive filtration of wastewater for P removal and recovery, micropollutant catalytic oxidation, and negative CO₂e: Life cycle assessment and techno‐economic analysis

Water Environment Research, Journal Year: 2023, Volume and Issue: 95(12)

Published: Dec. 1, 2023

Life cycle assessment (LCA) and techno-economic analysis (TEA) models are developed for a tertiary wastewater treatment system that employs biochar-integrated reactive filtration (RF) approach. This innovative incorporates the utilization of biochar (BC) either in conjunction with or independently iron-ozone catalytic oxidation (CatOx)-resulting two configurations: Fe-CatOx-BC-RF BC-RF. The technology demonstrates 90%-99% total phosphorus removals, adsorption to recovery, >90% destructive removal observed micropollutants. In this work, we conduct an ISO-compliant LCA 49.2 m3 /day (9 gpm) field pilot-scale 1130 (0.3 MGD) water resource recovery facility (WRRF)-installed RF system, modeled BC addition at same rate 0.45 g/L quantify their environmental impacts. results indicated pilot is dose-dependent carbon-negative -1.21 kg CO2 e/m3 , where constitutes -1.53 kg/m3 e beneficial impact process. For WRRF-installed addition, overall process changed from 0.02 carbon negative -1.41 demonstrating potential as emissions technology. Using C100 100-year accounting approach rather than Cnet reduces these metrics by about 25%. A stochastic TEA cost using combinatorial P removal/recovery, micropollutant removal, disinfection advanced shows scale, mean treating WRRF secondary influent metric US$0.18 ± US$0.01/m3 achieve neutrality. dose estimation 3780 (1 facility, neutral reduced further US$0.08 $0.01 added US$0.03/m3 . Overall, demonstrate negativity become performance standard important attainable pollutant pathogen removal. PRACTITIONER POINTS: scale without ozonation global warming -1.21-kg CO2e/m3 while removing TP detected Biochar-integrated use can aid long-term sequestration reducing footprint manner, allowing carbon-neutral companion paper work (Yu et al., 2023) presents details related operation mechanism evaluates engineering laboratory research trials. Techno-economic Monte Carlo modeling forecasted low US$0.11/m3 0.01 3780-m3/day installation total. treatmentperformance

Language: Английский

Availability of Recycled Phosphorus on Biochar Reacted with Wastewater to Support Growth of Lactuca sativa

Soil Systems, Journal Year: 2024, Volume and Issue: 8(3), P. 93 - 93

Published: Aug. 28, 2024

The use of biochar in water resource and recovery facilities (WRRF) shows promise for phosphorus (P) to as a biochar-based fertilizer (BBF) that can replace conventional fertilizers, promote carbon sequestration, improve soil quality. In this study, was recovered after being dosed into secondary-treated discharge from municipal WRRF. value the BBF tested lettuce (Lactuca sativa) growth trial. compared an inorganic fertilizer, raw biochar, controls had either only nitrogen (N) or no amendment. ability treatments support plant determined by measuring height, biomass, leaf tissue total N P concentration, Plant quality Fe-modified used WRRF 9.05 (±0.44) on 10-point scale 9.61 (±0.46) treatment 2.22 (±0.82) untreated control. concentrations were 6.28 (±0.83), 9.88 (±0.90), 15.46 (±2.54), 6.36 (±1.91) g plant−1 WRRF, amendment treatments, respectively. Soil availability uptake amount leaves indicated released more slowly than fertilizer; however, it sufficiently available maturity. Results these experiments show supply adequate plants. slow release will reduce leaching surface waters.

Language: Английский