Phosphorus removal from lagoon-pretreated swine wastewater by pilot-scale surface flow constructed wetlands planted with Myriophyllum aquaticum

2017 ◽  
Vol 576 ◽  
pp. 490-497 ◽  
Author(s):  
Pei Luo ◽  
Feng Liu ◽  
Xinliang Liu ◽  
Xiao Wu ◽  
Ran Yao ◽  
...  
Keyword(s):  
Constructed Wetlands ◽  
Phosphorus Removal ◽  
Pilot Scale ◽  
Surface Flow ◽  
Swine Wastewater ◽  
Myriophyllum Aquaticum ◽  
Scale Surface ◽  
Surface Flow Constructed Wetlands

scholarly journals Myriophyllum aquaticum-Based Surface Flow Constructed Wetlands for Enhanced Eutrophic Nutrient Removal—A Case Study from Laboratory-Scale up to Pilot-Scale Constructed Wetland

Water ◽  
2018 ◽  
Vol 10 (10) ◽  
pp. 1391
Author(s):  
Shugeng Feng ◽  
Shengjun Xu ◽  
Xupo Zhang ◽  
Rui Wang ◽  
Xiaona Ma ◽  
...  
Keyword(s):  
Constructed Wetlands ◽  
Scale Up ◽  
Plug Flow ◽  
Pilot Scale ◽  
Surface Flow ◽  
Laboratory Scale ◽  
Myriophyllum Aquaticum ◽  
Nitrogen And Phosphorus ◽  
Promising Alternative ◽  
Scale Surface

Water pollution caused by various eutrophic nutrients such as nitrogen (N) and phosphorus (P), such as outbreaks of eutrophication in rivers and lakes, has become a serious environmental problem in China. Such problems have spurred extensive studies aiming at finding environmentally friendly solutions. Various constructed wetlands (CWs), planted with different macrophytes, have been considered as environmentally safe technologies to treat various wastewaters for several decades. Due to their low energy and operational requirements, CWs are promising alternative solutions to water eutrophication problems. Within the CWs, macrophytes, sediments, and the microbial community are indispensable constituents of such an ecosystem. In this study, a laboratory-scale surface flow CW (LSCW) was constructed to investigate the effects of two different plants, Eichhornia (E.) crassipes (Mart.) Solms and Myriophyllum (M.) aquaticum, on the removal of eutrophic N and P. The results showed that both plants could significantly reduce these nutrients, especially ammonium (NH4+), and LSCW planted with M. aquaticum performed better (82.1% NH4+ removal) than that with E. crassipes (66.4% NH4+ removal). A Monod model with a plug flow pattern was used to simulate the relationship of influent and effluent concentrations with the kinetic parameters of this LSCW. Based on the model, a pilot-scale surface flow CW (PSCW) was designed, aiming to further enhance N and P removal. The treatment with M. aquaticum and polyethylene materials showed the best removal efficiency on NH4+ as well as on total nitrogen and phosphorus. In general, the enlarged PSCW can be a promising solution to the eutrophication problems occurring in aquatic environments.

The integration of constructed wetlands into a treatment system for airport runoff

2001 ◽  
Vol 44 (11-12) ◽  
pp. 469-476 ◽  
Author(s):  
D.M. Revitt ◽  
P. Worrall ◽  
D. Brewer
Keyword(s):  
Constructed Wetlands ◽  
Surface Runoff ◽  
Pilot Scale ◽  
Surface Flow ◽  
Pollutant Removal ◽  
Treatment System ◽  
Effluent Water ◽  
Surface Areas ◽  
Scale Surface ◽  
Surface Flow Constructed Wetlands

A new surface runoff treatment system has been designed for London Heathrow Airport, which incorporates separate floating constructed wetlands or reedbeds and sub-surface flow constructed wetlands as major pollutant removal systems. The primary requirement of the newly developed treatment system is to control the concentrations of glycols following their use as de-icers and anti-icers within the airport. The ability of reedbeds to contribute to this treatment role was fully tested through pilot scale, on-site experiments over a 2 year period. The average reductions in runoff BOD concentrations achieved by pilot scale surface flow and sub-surface flow reedbeds were 30.9% and 32.9%, respectively. The corresponding average glycol removal efficiencies were 54.2% and 78.3%, following shock dosing inputs. These treatment performances are used to predict the required full scale constructed wetland surface areas needed to attain the desired effluent water quality. The treatment system also incorporates aeration, storage and, combined with reedbed technology, has been designed to reduce a mixed inlet BOD concentration of 240 mg/l to less than 40 mg/l for water temperatures varying between 6°C and 20°C.

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