Full-scale hybrid constructed wetlands monitoring for decentralized tertiary treatment of municipal wastewater

2021 ◽  
Vol 14 (14) ◽  
Author(s):  
Karim Ergaieg ◽  
Taieb Ben Miled
Keyword(s):  
Constructed Wetlands ◽  
Municipal Wastewater ◽  
Full Scale ◽  
Tertiary Treatment

Occurrence and die-off of indicator organisms in the sediment in two constructed wetlands

2001 ◽  
Vol 44 (11-12) ◽  
pp. 223-230 ◽  
Author(s):  
T.A. Stentström ◽  
A. Carlander
Keyword(s):  
Constructed Wetlands ◽  
Municipal Wastewater ◽  
Full Scale ◽  
Water Phase ◽  
Fecal Coliforms ◽  
Main Concern ◽  
Particle Removal ◽  
Stormwater Treatment ◽  
Indicator Organisms ◽  
Factors Affecting

The interest in constructed wetlands for municipal wastewater and stormwater treatment has recently increased but data for the reduction efficiency of indicator organisms are often restricted to the water phase. In a full-scale wastewater wetland in Sweden fecal coliforms and enterococci were reduced by 97-99.9% and coliphages by approximately 70%. The factors affecting the reduction are however less well understood. In two full-scale wetlands, for stormwater and wastewater treatment, an assessment has been done of the particle associated fraction of indicator organisms. No significant differences in the particle-associated numbers were seen between the inlet and the outlet of the wetlands, but the amounts of sedimenting particles varied between the two sites. In the stormwater wetland the amount of sedimenting particles at the outlet was 3% of the amount at the inlet, while the wastewater wetland had much lower particle removal efficiency. The reduction of suspended particles seems to be the main factor for bacterial elimination from the water phase, governed by vegetation and design. In the sediment, survival of presumptive E.coli, fecal enterococci, Clostridium and coliphages were long with T90-values of 27, 27, 252 and 370 days, respectively. The organisms can however be reintroduced by resuspension. Viruses in the water phase may be of main concern for a risk assessment of receiving waters.

Investigation of a Full-Scale Anaerobic-Aerobic and Constructed Wetlands Integrated System Treating Livestock Wastewater

2010 ◽  
Vol 113-116 ◽  
pp. 1189-1194
Author(s):  
Yong Ming Wu ◽  
Jin Bao Wan ◽  
Ji Hai Xiong ◽  
Shun Fa Wang ◽  
Ping Gu
Keyword(s):  
Constructed Wetlands ◽  
Biological Treatment ◽  
Large Scale ◽  
Wastewater Treatment Plants ◽  
Removal Rate ◽  
Full Scale ◽  
Integrated System ◽  
Tertiary Treatment ◽  
Livestock Wastewater ◽  
Aerobic Process

A full-scale integrated system of the IOC-SBBR and CWs for the biological treatment of livestock wastewater was carried out in this study, the combined IOC-SBBR process had the removal rates of COD, NH4+-N, TN reached 96.5%, 89% and 81.1%, respectively. CWs were used for the further tertiary treatment of livestock wastewater, which the average removal rate of the NH4+-N and TN was 61.3% and 60.2%, the overall integrated system was superior to the direct anaerobic or aerobic process for the treatment of large-scale livestock wastewater, would provide the valuable design and operation for the livestock wastewater treatment plants.

Considerations on the design and financial feasibility of full-scale membrane bioreactors for municipal applications

2010 ◽  
Vol 61 (10) ◽  
pp. 2461-2468 ◽  
Author(s):  
Ch. Brepols ◽  
H. Schäfer ◽  
N. Engelhardt
Keyword(s):  
Energy Consumption ◽  
Life Cycle Cost ◽  
Energy Demand ◽  
Municipal Wastewater ◽  
Membrane Bioreactors ◽  
Full Scale ◽  
Cost Comparison ◽  
Tertiary Treatment ◽  
Specific Investment ◽  
River Region

Based on the practical experience in design and operation of three full-scale membrane bioreactors (MBR) for municipal wastewater treatment that were commissioned since 1999, an overview on the different design concepts that were applied to the three MBR plants is given. The investment costs and the energy consumption of the MBRs and conventional activated sludge (CAS) plants (with and without tertiary treatment) in the Erft river region are compared. It is found that the specific investment costs of the MBR plants are lower than those of comparable CAS with tertiary treatment. A comparison of the specific energy demand of MBRs and conventional WWTPs is given. The structure of the MBRs actual operational costs is analysed. It can be seen that energy consumption is only responsible for one quarter to one third of all operational expenses. Based on a rough design and empirical cost data, a cost comparison of a full-scale MBR and a CAS is carried out. In this example the CAS employs a sand filtration and a disinfection in order to achieve comparable effluent quality. The influence of membrane lifetime on life cycle cost is assessed.

Occurrence and removal of ibuprofen and its metabolites in full-scale constructed wetlands treating municipal wastewater

2018 ◽  
Vol 120 ◽  
pp. 1-5 ◽  
Author(s):  
Tereza Dvořáková Březinova ◽  
Jan Vymazal ◽  
Milan Koželuh ◽  
Lumír Kule
Keyword(s):  
Constructed Wetlands ◽  
Municipal Wastewater ◽  
Full Scale

Comparison of microfauna communities in full scale subsurface flow constructed wetlands used as secondary and tertiary treatment

2007 ◽  
Vol 41 (8) ◽  
pp. 1645-1652 ◽  
Author(s):  
Jaume Puigagut ◽  
Humbert Salvadó ◽  
David García ◽  
Francesc Granes ◽  
Joan García
Keyword(s):  
Constructed Wetlands ◽  
Subsurface Flow ◽  
Full Scale ◽  
Tertiary Treatment ◽  
Subsurface Flow Constructed Wetlands

Costs of tertiary treatment of municipal wastewater by rapid sand filter with coagulants and UV

2003 ◽  
Vol 3 (4) ◽  
pp. 145-152 ◽  
Author(s):  
H. Heinonen-Tanski ◽  
P. Juntunen ◽  
R. Rajala ◽  
E. Haume ◽  
A. Niemelä
Keyword(s):  
Total Phosphorus ◽  
Municipal Wastewater ◽  
Pilot Scale ◽  
Treated Wastewater ◽  
Tertiary Treatment ◽  
Sand Filter ◽  
Physico Chemical ◽  
Bathing Waters ◽  
Filtration Unit ◽  
Microbial Groups

Municipal treated wastewater has been tertiary treated in a pilot-scale rapid sand filter. The filtration process was improved by using polyaluminium coagulants. The sand-filtered water was further treated with one or two UV reactors. The quality changes of wastewater were measured with transmittance, total phosphorus, soluble phosphorus, and somatic coliphages, FRNA-coliphages, FC, enterococci and fecal clostridia. Sand filtration alone without coagulants improved slightly some physico-chemical parameters and it had almost no effect on content of microorganisms. If coagulants were used, the filtration was more effective. The reductions were 88-98% for microbial groups and 80% for total phosphorus. The wastewater would meet the requirements for bathing waters (2,000 FC/100 ml, EU, 1976). UV further improved the hygiene level; this type of treated wastewater could be used for unrestricted irrigation (2.2 TC/100 ml, US.EPA 1992). The improvement was better if coagulants were used. The price for tertiary treatment (filtration + UV) would have been 0.036 Euro/m3 according to prices in 2001 in 22 Mm3/a. The investment cost needed for the filtration unit was 0.020 Euro/m3 (6%/15a). Filtration with coagulants is recommended in spite of its costs, since the low transmittance of unfiltered wastewater impairs the efficiency of the UV treatment.

scholarly journals Assessment of Microplastics in a Municipal Wastewater Treatment Plant with Tertiary Treatment: Removal Efficiencies and Loading per Day into the Environment

Water ◽  
2021 ◽  
Vol 13 (10) ◽  
pp. 1339
Author(s):  
Javier Bayo ◽  
Sonia Olmos ◽  
Joaquín López-Castellanos
Keyword(s):  
Wastewater Treatment ◽  
Wastewater Treatment Plant ◽  
Municipal Wastewater ◽  
Removal Rate ◽  
Treatment Plant ◽  
Source Control ◽  
Municipal Wastewater Treatment ◽  
Tertiary Treatment ◽  
Stable Performance ◽  
Wastewater Samples

This study investigates the removal of microplastics from wastewater in an urban wastewater treatment plant located in Southeast Spain, including an oxidation ditch, rapid sand filtration, and ultraviolet disinfection. A total of 146.73 L of wastewater samples from influent and effluent were processed, following a density separation methodology, visual classification under a stereomicroscope, and FTIR analysis for polymer identification. Microplastics proved to be 72.41% of total microparticles collected, with a global removal rate of 64.26% after the tertiary treatment and within the average retention for European WWTPs. Three different shapes were identified: i.e., microfiber (79.65%), film (11.26%), and fragment (9.09%), without the identification of microbeads despite the proximity to a plastic compounding factory. Fibers were less efficiently removed (56.16%) than particulate microplastics (90.03%), suggesting that tertiary treatments clearly discriminate between forms, and reporting a daily emission of 1.6 × 107 microplastics to the environment. Year variability in microplastic burden was cushioned at the effluent, reporting a stable performance of the sewage plant. Eight different polymer families were identified, LDPE film being the most abundant form, with 10 different colors and sizes mainly between 1–2 mm. Future efforts should be dedicated to source control, plastic waste management, improvement of legislation, and specific microplastic-targeted treatment units, especially for microfiber removal.

scholarly journals Performance of full scale constructed wetlands in removing antibiotics and antibiotic resistance genes

2021 ◽  
pp. 147368
Author(s):  
N.A. Sabri ◽  
H. Schmitt ◽  
B.M. van der Zaan ◽  
H.W. Gerritsen ◽  
H.H.M. Rijnaarts ◽  
...  
Keyword(s):  
Antibiotic Resistance ◽  
Constructed Wetlands ◽  
Resistance Genes ◽  
Antibiotic Resistance Genes ◽  
Full Scale

Area-based speciation kinetic analysis of the multipollutant removal in Constructed Wetlands to enhance its treatment efficiency

2021 ◽  
Author(s):  
Manoj Kumar ◽  
Rajesh Singh
Keyword(s):  
Wastewater Treatment ◽  
Kinetic Analysis ◽  
Constructed Wetlands ◽  
Municipal Wastewater ◽  
Zero Order ◽  
Pollutant Removal ◽  
Municipal Wastewater Treatment ◽  
Treatment Efficiency ◽  
First Order ◽  
Present Study Area

In the present study area-based, pollutant removal kinetic analysis was considered using the Zero-order, first-order decay and efficiency loss (EL) models in the constructed wetlands (CWs) for municipal wastewater treatment....

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