Nutrient Removal in a Reed Bed System

1991 ◽  
Vol 23 (4-6) ◽  
pp. 729-737 ◽  
Author(s):  
R. Haberl ◽  
R. Perfler
Keyword(s):  
Plant Physiology ◽  
Soil Properties ◽  
Nutrient Uptake ◽  
Removal Efficiency ◽  
Nutrient Removal ◽  
Loamy Soil ◽  
Reed Bed

Since 1984 investigations concerning sewage technology, plant physiology and soil properties have been carried out on the reed bed system at Mannersdorf/Leithagebirge (local loamy soil, Phragmites, planted area 3×150 m2, influent 30 - 50 mm/d). The removal efficiency of COD and BOD5 amounts to 80-90 % and 90 - 98 %, respectively. Elimination of nutrients (NTOT and PTOT) varies from 3 0 to 60 %, in general. Total nitrification cannot be reported for any of the plots fed with different sewage qualities. Nutrient uptake of NTOT and PTOT by Phragmites a. reaches 30 or 15 % of influent sewage load during July and August but is of no importance with respect to the average of the year. The proportion of PTOT in the soil is still increasing every year and now amounts to about 450 mg/100g soil. The concentration of phosphorus essentially stagnates at the level of 50 mg/100g soil.

Evaluation of extremely shallow vertical subsurface flow constructed wetland for nutrient removal

2009 ◽  
Vol 59 (2) ◽  
pp. 295-301 ◽  
Author(s):  
T. Taniguchi ◽  
K. Nakano ◽  
N. Chiba ◽  
M. Nomura ◽  
O. Nishimura
Keyword(s):  
Removal Efficiency ◽  
Nitrogen Removal ◽  
Nutrient Removal ◽  
Phosphorus Removal ◽  
Sewage Treatment ◽  
Subsurface Flow ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Basic Nitrogen ◽  
Reed Bed

Mesocosm-scale vertical subsurface flow constructed wetlands (SSF, 0.5 m length, 0.3 m width) with different reed-bed thickness, including standard SSF (SD, 0.6 m deep), shallow SSF (S, 0.3 m deep) and extremely shallow SSF (ES, 0.075 m deep) were set up at sewage treatment plant and their nutrient removal efficiencies from the sewage plant effluent were compared under three hydraulic loading rate (HLR) conditions of 0.15, 0.45 and 0.75 m3 m−2 d−1. A very interesting characteristics was found for the extremely shallow SSF, in which a high nitrogen removal efficiency was obtained despite the effective hydraulic retention time was only 1/8 times as long as the standard SSF. The results of kinetic analysis confirmed that the high volumetric nitrogen removal efficiency observed in the extremely shallow SSF did not depend on high response against the water temperature but on much higher basic nitrogen removal activity compared with other SSF. The phosphorus removal depending on the adsorption to sand in the reed-bed filter was, however, the lowest in the extremely shallow SSF although the volumetric removal efficiency was much higher compared with other SSF. Results of morphological analysis of rhizosphere collected from respective reed-bed suggested that the extremely shallow SSF lead to a very high-density rhizosphere, resulting in a high basic nitrogen removal activity and volumetric phosphorus removal efficiency.

scholarly journals The Optimal Width and Mechanism of Riparian Buffers for Storm Water Nutrient Removal in the Chinese Eutrophic Lake Chaohu Watershed

Water ◽  
2018 ◽  
Vol 10 (10) ◽  
pp. 1489 ◽  
Author(s):  
Xiuyun Cao ◽  
Chunlei Song ◽  
Jian Xiao ◽  
Yiyong Zhou
Keyword(s):  
Removal Efficiency ◽  
Nutrient Removal ◽  
Eutrophic Lake ◽  
Riparian Buffers ◽  
Nutrient Level ◽  
Nitrification Rate ◽  
Lake Chaohu ◽  
Potential Nitrification ◽  
Different Types ◽  
Nutrient Removal Efficiency

Riparian buffers play an important role in intercepting nutrients entering lakes from non-point runoffs. In spite of its ecological significance, little is known regarding the underlying mechanisms of riparian buffers or their optimal width. In this study, we examined nutrient removal efficiency, including the quantity of nutrients and water quality, in the littoral zone of different types of riparian buffers in the watershed around eutrophic Lake Chaohu (China), and estimated the optimal width for different types of riparian buffers for effective nutrient removal. In general, a weak phosphorus (P) adsorption ability and nitrification-denitrification potential in soil resulted in a far greater riparian buffer demand than before in Lake Chaohu, which may be attributed to the soil degradation and simplification of cover vegetation. In detail, the width was at least 23 m (grass/forest) and 130 m (grass) for total P (TP) and total nitrogen (TN) to reach 50% removal efficiency, respectively, indicating a significantly greater demand for TN removal than that for TP. Additionally, wetland and grass/forest riparian buffers were more effective for TP removal, which was attributed to a high P sorption maximum (Qmax) and a low equilibrium P concentration (EPC0), respectively. The high potential nitrification rate (PNR) and potential denitrification rate (PDR) were responsible for the more effective TN removal efficiencies in grass riparian buffers. The nutrient removal efficiency of different types of riparian buffers was closely related with nutrient level in adjacent littoral zones around Lake Chaohu.

Small wastewater treatment plants in Flanders (Belgium): standard approach and experiences with constructed reed beds

2000 ◽  
Vol 41 (1) ◽  
pp. 57-63 ◽  
Author(s):  
S. Vandaele ◽  
C. Thoeye ◽  
B. Van Eygen ◽  
G. De Gueldre
Keyword(s):  
Wastewater Treatment ◽  
Removal Efficiency ◽  
Wastewater Treatment Plants ◽  
Treatment Plant ◽  
Pilot Scale ◽  
Surface Flow ◽  
Limiting Factor ◽  
Vertical Flow ◽  
Reed Beds ◽  
Reed Bed

In Flanders (Belgium) an estimated 15% of the population will never be connected to a central wastewater treatment plant (WWTP). Small WWTPs can be a valuable option. Aquafin bases the decision to build SWWTPs on a drainage area study. To realise an accelerated construction the process choice is made accordingly to a standard matrix, which represents the different technologies in function of the size and the effluent consents. A pilot scale constructed two-stage reed bed is used to optimise the concept of the reed beds. The concept consists of a primary clarifier, two parallel vertical flow reed beds followed by a sub-surface flow reed bed. The removal efficiency of organic pollutants is high (COD: 89%, BOD: 98%). Phosphorus removal is high at the start-up but diminishes throughout the testing period (from 100% to 71% retention after 7 months). Nitrogen removal amounts to 53% on average. Nitrification is complete in summer. Denitrification appears to be the limiting factor. In autumn leakage of nitrogen is assumed. Removal efficiency of pathogens amounts to almost 99%. Clogging forms a substantial constraint of the vertical flow reed bed. Problems appear to be related with presettlement, feed interval and geotextile.

Performance of pilot Hybrid Reed Bed constructed wetland with aeration system on nutrient removal for domestic wastewater treatment

2020 ◽  
Vol 19 ◽  
pp. 100891 ◽  
Author(s):  
Omar Hamed Jehawi ◽  
Siti Rozaimah Sheikh Abdullah ◽  
Setyo Budi Kurniawan ◽  
Nur ‘Izzati Ismail ◽  
Mushrifah Idris ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Constructed Wetland ◽  
Nutrient Removal ◽  
Domestic Wastewater ◽  
Aeration System ◽  
Domestic Wastewater Treatment ◽  
Reed Bed
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