Nutrient Removal Through Autumn Harvest ofPhragmites australisandThypha latifoliaShoots in Relation to Nutrient Loading in a Wetland System Used for Polishing Sewage Treatment Plant Effluent

2005 ◽  
Vol 40 (6-7) ◽  
pp. 1133-1156 ◽  
Author(s):  
SYLVIA TOET ◽  
MEIKE BOUWMAN ◽  
ANNECHIEN CEVAAL ◽  
JOS T.A. VERHOEVEN
Keyword(s):  
Nutrient Removal ◽  
Nutrient Loading ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Wetland System

Possibilities for increased nutrient removal with a final filtration stage

1996 ◽  
Vol 33 (12) ◽  
pp. 147-153
Author(s):  
M. Rothman ◽  
J. Hultgren
Keyword(s):  
Activated Sludge ◽  
Nitrogen Removal ◽  
Nutrient Removal ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
High Concentrations ◽  
Winter Time ◽  
Filtration Stage

Bromma sewage treatment plant (STP) is one of three plants in Stockholm. To meet more stringent requirements for nutrient removal the plant has been extended with a final filtration stage. Earlier it has not been possible to operate the plant with nitrification during winter time. Bad settling properties of the activated sludge have led to bulking sludge and high concentrations of BOD and phosphorus in the effluent. With the filter stage it is now possible to reduce the load on the biological stage by by-passing part of the flow directly to the filters. The result has been very promising and it seems that the plant can meet the new demands for nitrogen removal without extension of the aerated volumes.

The effect of hydraulic retention time on the removal of pollutants from sewage treatment plant effluent in a surface-flow wetland system

Wetlands ◽  
10.1672/13 ◽  
2005 ◽  
Vol 25 (2) ◽  
pp. 375-391 ◽  
Author(s):  
Sylvia Toet ◽  
Richard S. P. Logtestijn ◽  
Ruud Kampf ◽  
Michiel Schreijer ◽  
Jos T. A. Verhoeven
Keyword(s):  
Retention Time ◽  
Hydraulic Retention Time ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Surface Flow ◽  
Wetland System

scholarly journals Preliminary Investigation of an Installed Pilot-Scale Biological Nutrient Removal Technology (BNRT) for Sewage Treatment

2021 ◽  
Vol 333 ◽  
pp. 12002
Author(s):  
Regina Damalerio ◽  
Aileen Orbecido ◽  
Michael Angelo Promentilla ◽  
Ramon Christian Eusebio ◽  
Liza Patacsil ◽  
...  
Keyword(s):  
Nutrient Removal ◽  
Preliminary Investigation ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Pilot Scale ◽  
Biological Nutrient Removal ◽  
Nitrogen And Phosphorus ◽  
Removal Technology ◽  
New Treatment

Water utilities, commercial and industrial establishments are required to upgrade or install new treatment systems to comply with the revised effluent standards issued by the Department of Environment and Natural Resources – Environment Management Bureau (DENR – EMB) which now includes removal and monitoring of nutrients (nitrogen and phosphorus components). One solution is to utilize a biological nutrient removal technology (BNRT) system capable of removing nutrients from sewage. The on-going study aims to investigate the performance of the pilot-scale system in the removal of nutrients from sewage. The designed pilot-scale anaerobic-anoxic-oxic (A2O) process with a total hydraulic retention time of 8.37 hrs. was operated in an existing sewage treatment plant (STP). System modification was adapted to ensure continuous operation. Dissolved oxygen (DO) and temperature of each compartment were evaluated after 45 days of system modification. The DO of the anaerobic and oxic compartment remained within the required range, while the internal recycling flowrate and/or aeration must be adjusted to achieve a DO concentration of 0.20 – 0.50 mg/L in the anoxic compartment. The research is financially supported by the Philippine Council for Industry, Energy and Emerging Technology Research and Development of the Department of Science and Technology (PCIEERD Project No. 04176).

The functioning of a wetland system used for polishing effluent from a sewage treatment plant

2005 ◽  
Vol 25 (1) ◽  
pp. 101-124 ◽  
Author(s):  
Sylvia Toet ◽  
Richard S.P. Van Logtestijn ◽  
Michiel Schreijer ◽  
Ruud Kampf ◽  
Jos T.A. Verhoeven
Keyword(s):  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Wetland System

Nutrient Removal in a 2-Stage Biological Sewage Treatment Plant

1992 ◽  
Vol 25 (4-5) ◽  
pp. 135-142
Author(s):  
E. Sickert
Keyword(s):  
Nutrient Removal ◽  
Combined Treatment ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Distribution Channel ◽  
Operating Conditions ◽  
Phosphorus Concentration ◽  
Legal Regulations ◽  
Excess Sludge

The Dradenau sewage treatment plant consists basically of a large activated sludge plant which supplements the treatment stages of the Köhlbrandhöft plant. Although built to mainly oxidize ammonia and despite unfavourable operating conditions - the different locations of the Köhlbrandhöft and Dradenau plants - considerable amounts of nitrogen have successfully been eliminated. Denitrification takes place in the distribution channel of the Dradenau plant and in one of the biological stages of the Köhlbrandhöft plant. This stage takes over the excess sludge from the Dradenau plant resulting in nitrifying - and denitrifying - part of the nitrogen load already here. There is an average overall reduction of 70 %. Simultaneous precipitation at the Köhlbrandhöft treatment plant reduces the phosphorus concentration in the effluent of the combined treatment plants Köhlbrandhöft/Dradenau to values recently set by legal regulations (1 mgP/l).

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.

The use of constructed wetlands to upgrade treated sewage effluents before discharge to natural surface water in texel island, The Netherlands – pilot study

1997 ◽  
Vol 35 (5) ◽  
pp. 231-237 ◽  
Author(s):  
M. Schreijer ◽  
R. Kampf ◽  
S. Toet ◽  
J. Verhoeven
Keyword(s):  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Chemical Precipitation ◽  
Pilot Scale ◽  
E Coli ◽  
System A ◽  
Treated Sewage ◽  
Wetland System ◽  
High Degree

Since 1988 experiments have been carried out on a pilot scale on polishing of sewage treatment plant (STP) effluent in a constructed wetland system, a combination of a macrophyte bed and a lagoon. The hydraulic retention time (HRT) has been between one and ten days. At HRTs of 2-3 days a favourable oxygen regime and a high degree of removal of E. coli bacteria could be obtained. The natural alternation of low and high oxygen levels resulted in an extra nitrogen removal from the low levels of nitrogen in the effluent of the STP. Phosphorus removal in the wetland system under these conditions was low, therefore chemical precipitation has to take place in the STP. The favourable results of the study have led to the construction of a full scale 3.5 ha wetland system for the treatment of 3500 m3 effluent day−1 in 1994. The HRT is 2.1 days at dry weather flow. The purpose of this wetland is to further polish the STP effluent in order to match the water quality of the natural local surface waters.

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