Enhanced Pretreatment of Natural Rubber Industrial Wastewater Using Magnetic Seed Coagulation with Ca(OH)2

Water, Journal Year: 2024, Volume and Issue: 16(6), P. 847 - 847

Published: March 15, 2024

The efficiency of magnetic seed coagulation (MSC) with pH adjustment by NaOH and Ca(OH)2 as a pretreatment for high-strength natural rubber industrial wastewater (NRIWW) was compared in this study. high content suspended solids (SSs) other inhibitory substances NRIWW is primary issue which affects its subsequent secondary tertiary treatment processes. MSC process polyaluminum chloride (PAC), anionic polymer (polyacrylamide—PAM)), seeds (MS) (ferric oxide (Fe3O4)) proven to be cost-effective NRIWW, showed improved performance, turbidity, COD, TSS removals 95%, 56%, 64%, respectively. Sedimentation enhanced from 30 min conventional less than 5 the MSC. organic components reacted MS generate Fe–OH/Fe–OH+ linkages through processes surface complexing hydrogen bonding. According fractal analysis, optimized produces complex flocs that are uniform densely packed. Additionally, served an adsorbent promoted development boosting their density size. presents robust NRIWW.

Language: Английский

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Circular And Sustainable: Evaluating Lithium‐Ion Battery Recycling using a Combined Statistical Entropy and Life Cycle Assessment Methodology

ChemSusChem, Journal Year: 2024, Volume and Issue: unknown

Published: April 24, 2024

While there has been a growing interest on the concept of Circular Economy (CE), its correlation with sustainability remains controversial. In this work, combination Statistical Entropy Analysis (SEA) and Life Cycle Assessment (LCA) is proposed as new methodology to evaluate recycling processes from perspective materials circularity environmental impacts using Li-ion battery process case study. This work addresses need quantitative indicators, SEA evaluates concentration at systems level, while LCA measures impact in comparison virgin raw production. It was found that optimization points can be by simultaneously accounting for recovery categories global warming potential, ozone depletion mineral resource scarcity. Furthermore, strong first time between critical elements The thus offers robust analysis product lifecycle aids design CE perspective.

Language: Английский

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Carbon footprint analysis of wastewater treatment processes coupled with sludge in situ reduction

Water Research X, Journal Year: 2024, Volume and Issue: 24, P. 100243 - 100243

Published: July 26, 2024

The goal of this study was to assess the impacts or benefits sludge in situ reduction (SIR) within wastewater treatment processes with relation global warming potential plants, a comprehensive consideration and treatment. anaerobic side-stream reactor (ASSR) process activated (SPRAS), two typical SIR technologies, were used compare carbon footprint analysis results conventional - anoxic oxic (AAO) process. Compared AAO, ASSR efficiency (SRE) 30 % increased greenhouse gas (GHG) emissions by 1.1 1.7 %, while SPRAS SRE 74 reduced GHG 12.3 17.6 %. Electricity consumption (0.025 0.027 kg CO2-eq/m3), CO2 (0.016 0.059 N2O (0.009 0.023 CO2-eq/m3) for removal secondary substrates released from decay major contributor system. By lowering production organic matter content sludge, significantly decreased footprints associated disposal. threshold SREs 27.7 34.6 advanced dewatering sanitary landfill drying-incinerating routes, respectively. Overall, could be considered as cost-effective sustainable low-carbon technology

Language: Английский

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Decoding China's anthropogenic typical pollutant discharge patterns: Long-term dynamics and hotspot transitions driven by population, diet, and sanitation

Water Research, Journal Year: 2023, Volume and Issue: 250, P. 121049 - 121049

Published: Dec. 21, 2023

Language: Английский

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Integrating topographic factors for effective urban sponge construction in mountainous regions: A case study

Journal of Environmental Management, Journal Year: 2024, Volume and Issue: 366, P. 121693 - 121693

Published: July 8, 2024

Language: Английский

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Comparison of Thermophilic–Mesophilic and Mesophilic–Thermophilic Two-Phase High-Solid Sludge Anaerobic Digestion at Different Inoculation Proportions: Digestion Performance and Microbial Diversity

Microorganisms, Journal Year: 2023, Volume and Issue: 11(10), P. 2409 - 2409

Published: Sept. 27, 2023

This study investigated the performance of thermophilic-mesophilic (T-M) and mesophilic-thermophilic (M-T) two-phase sludge anaerobic digestion at different inoculation proportions after a change in temperature. After temperature change, pH, total ammonia nitrogen (TAN), free (FAN), solubility chemical oxygen demand (SCOD), alkalinity (TA) levels digesters were between thermophilic control mesophilic digesters. However, volatile fatty acid (VFA) higher than those or The bacteria communities M-T more diverse T-M. temperature, bacterial community was dominated by Coprothermobacter. relative abundance (RA) Methanobacterium, Methanosaeta, Methanospirillum that T-M In comparison, RA Methanosarcina ultimate methane yields greater Nevertheless, yield all presented an earlier increase later decrease trend with increasing proportion. Optimal production condition achieved when 15% (T-M15) inoculated under conditions, which promoted 123.6% (based on control) 27.4% control). An optimal proportion (about 15%) balanced number activity methanogens high-solid digestion.

Language: Английский

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Quantitative analysis of spatiotemporal coverage and uncertainty decomposition in OCO-2/3 XCO2 across China

Atmospheric Environment, Journal Year: 2024, Volume and Issue: 333, P. 120636 - 120636

Published: June 6, 2024

Language: Английский

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Strategic carbon emission assessment in sludge treatment: A dynamic tool for low-carbon transformation

Environment International, Journal Year: 2024, Volume and Issue: 193, P. 109124 - 109124

Published: Nov. 1, 2024

The carbon-neutral target presents a significant challenge for the sewage sludge treatment and disposal (SSTD) industry, necessitating strategic planning low-carbon transition. However, flexible comprehensive carbon emission analysis tools to support this goal remain lacking. This study tool evaluate characteristics future mitigation potentials of SSTD. integrates life cycle inventory (LCI) modeling-based analysis, sensitivity regression scenario analysis. Carbon emissions are dynamically calculated based on properties, technological level, industry external parameters, providing foundation adaptable evaluation tailored local conditions. framework considers potential effects multi-parameter multi-aspect changes in scene design, both within outside achieve dynamic simulations. A case conducted Wuhan, China, demonstrated usability application processes framework. results indicated that from SSTD projected more than double 2021 2060 without interventions. Among measures, energy chemical savings would yield largest reduction potential, followed by technical layout adjustment promotion efficiency. Operational optimization contribute least. With all measures applied, could decrease -82.91 kt CO

Language: Английский

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Optimizing anoxic/oxic intervals in intermittent aeration for STHP-AD filtrate treatment: Restoring partial nitrification and community dynamics in the SPNAD system

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 501, P. 157631 - 157631

Published: Nov. 12, 2024

Language: Английский

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Comparative life cycle assessment of landfill sludge treatment technologies in China

Environmental Science and Pollution Research, Journal Year: 2024, Volume and Issue: 31(28), P. 41208 - 41220

Published: June 7, 2024

Language: Английский

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