Study on the Effect of Bubbles on the Removal Efficiency of a Helical Tube Flocculator

Processes, Journal Year: 2025, Volume and Issue: 13(3), P. 758 - 758

Published: March 6, 2025

The tubular flocculation reactor is a new and efficient device for treating algae-containing wastewater. introduction of bubbles during the reaction process can effectively shorten time required floc separation. However, impact on formation removal in not well understood. To further clarify effect reactor’s operation, this study employed uniform experimental design, varying flow rate, chemical dosage, bubble distance, injection rate to examine influence under different operating conditions. results indicated that as distance increased from 0 m 7.6 m, efficiency 60% 70%, size 160 μm 165 μm, fractal dimension decreased 2.1 1.9. When volume 5% 30%, 50% 80%. Under constant conditions, rising speed flocs 0.4 mm·s−1 1.2 mm·s−1, while 30% 90%. A logarithmic correlation was observed between efficiency. linear relationship found size, with increasing 200 800 2.3 mm·s−1. An exponential speed, decreasing 1.93 2.02.

Language: Английский

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Integrating Ecological Footprint into Regional Ecological Well-Being Evaluation: A Case Study of the Guanzhong Plain Urban Agglomeration, China

Land, Journal Year: 2025, Volume and Issue: 14(4), P. 688 - 688

Published: March 25, 2025

This study incorporated ecological footprint (EF) consumption into a framework to assess well-being. A model and implementation for characterizing regional net well-being were then developed. Using the Guanzhong Plain Urban Agglomeration (GPUA) as case study, land use data from 2000 2020 utilized calculate ecosystem service value (ESV), representing supply side of functions. Simultaneously, EF was assessed demand side. Taking account level economic development characteristics people’s living, evaluation constructed arrive at deficit or surplus situation. The results indicated that: (1) overall ESV GPUA follows trend initial growth followed by decline. Woodland, grassland, farmland are main contributors total ESV, with regulating supporting services accounting more than 80% value. (2) in shows significant upward trend, increasing over 70% on average. carrying capacity has slightly increased, biologically productive area that can support human activities expanding 1909.49 million hectares. Additionally, urban agglomeration cities tended stabilize since 2015. (3) Since 2010, anthropogenic continued exceed capacity, resulting an deficit. average compensation per hectare increased 35.588 CNY 187.110 CNY. offers theoretical foundation definition research providing accurate assessment multiple scales. It is expected this approach will help reduce opportunity costs associated protection, while promoting balanced preservation.

Language: Английский

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Study on the Equity and Coupling Coordination of Ecosystem Services and Residents' Well-being in Jiangxi Province from the Perspective of Spatial Justice

Sustainable Cities and Society, Journal Year: 2025, Volume and Issue: unknown, P. 106395 - 106395

Published: April 1, 2025

Language: Английский

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