Effects of design and operational parameters on ammonium removal by single-stage French vertical flow filters treating raw domestic wastewater

Millot, Yoann; Troesch, Stéphane; Eßer, Dirk; Molle, Pascal; Morvannou, Ania; Gourdon, Rémy; Rousseau, Diederik

doi:10.1016/j.ecoleng.2016.10.002

Cited by 34 publications

(18 citation statements)

References 23 publications

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“…The highest TN removal was observed in Darżlubie (91.7%). Achieved results are similar to data described previously in [14,6,15,16]. During measurement period facilities worked with various effectiveness of nitrogen removal.…”

Section: Hf + Vf Configurationsupporting

confidence: 84%

Effectiveness of pollutants removal in hybrid constructed wetlands – different configurations case study

2017

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In recent years, an increase in interest in hybrid constructed wetland systems (HCWs) has been observed. The aim of the paper is to compare different HCW configurations in terms of mass removal rates and efficiency of pollutants removal. Analysed data have been collected at multistage constructed wetlands in Poland, which are composed by at least two beds: horizontal subsurface flow (SSHF) and vertical subsurface flow (SSVF). The evaluation was focused on hybrid constructed wetlands performance with HF+VF vs. VF+HF configuration, where influent wastewater of the same composition was treated. In analysed HCWs, the effective removal of organic matter from 75.2 to 91.6% COD was confirmed. Efficiency of total nitrogen removal varied from 47.3 to 91.7%. The most effective removal of TN (8.3 g m-2 d-1) occurred in the system with VF+VF+HF configuration.

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Section: Hf + Vf Configurationsupporting

confidence: 84%

Effectiveness of pollutants removal in hybrid constructed wetlands – different configurations case study

2017

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“…Several studies have focused on nitrogen (N) removal using different media (e.g., Millot et al, 2016;Wu et al, 2015;Zhang et al, 2012;Zurita et al, 2009). Zhang et al (2015) reviewed the performance of CWs in tropical and sub-tropical regions and concluded that the media significantly affected the removal efficiencies of TN,and NO 3 -N in vertical flow constructed wetland (VFCW) systems.…”

Section: Introductionmentioning

confidence: 99%

Nitrogen removal from sewage and septage in constructed wetland mesocosms using sand media amended with biochar

Rozari

Greenway

Hanandeh

2018

Ecological Engineering

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Biochar has been identified as a media amendment to improve nutrient removal from wastewater, and N retention and plant growth in agroforestry. It therefore has the potential for treating domestic wastewater. The aim of this research was to compare nitrogen removal and plant growth in pure sand and sand amended with biochar, in wetland mesocosms (240 L) receiving sewage. There were seven media treatments based on the proportions of biochar in the sand media (100% sand, sand and coir peat, 5, 10, 15, 20, 25% biochar). The plant species were Paperback tree (Melaleuca quinquenervia) and Lemongrass (Cymbopogon citratus). The mesocosms were continuously loaded for 8 months with secondary clarified wastewater (SCW) (16 L/day). Septage was then intermittently loaded (20 L/2 days) for a further 8 months. Inflow and outflow samples were monitored for TN, NH 4-N, and NO x-N. All treatments showed good nitrogen removal efficiency. Average removal efficiencies of TN, NO x-N and NH 4-N in the mesocosms loaded with SCW ranged from 71 to 87%, 81 to 93% and 65 to 79%, for 100% Sand to 25% Biochar respectively. For septage, the removal efficiencies ranged from 63 to 81%, 69 to 87% and 66 to 81%, for 100% Sand to 25% Biochar respectively. Significant differences of nitrogen outflow concentrations were observed between pure sand and sand amended with biochar. Physical chemical properties of the biochar would have facilitated microbial processes and adsorption. Strong positive correlations were observed between biochar content in the media and nitrogen removal rates. The increased nitrogen removal may be attributed to higher mineralisation of organic nitrogen and NH 4-N, especially in the case of septage where strong correlation was observed between BOD 5 and TN removal. Total N biomass in the plants harvested after 21 months ranged from 13.4-14.0 g N. The addition of biochar did not increase plant N biomass in either species.

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“…Indeed, the effluent from the WWTP always respected the water quality target set in the design phase ( Figure 2). The t-tests confirm that outlet concentrations are significantly lower than influent concentrations for both OUT 1 and OUT 2, with a significance lower than 0.05 for COD, BOD 5 , TN, N-NH 4 + , and TSS, and lower than 0.1 for TP (see Table S1 in Supplementary online material).…”

Section: Water Quality Dataset Analysismentioning

confidence: 82%

“…Indeed, the solid materials from wastewater will create an organic top layer on the surface area and has to be removed after 10-15 years, i.e., when it is already stabilized and can be used as soil conditioner [4]. FRBs are very efficient in the removal of suspended, dissolved organic matter, and pathogens and have a high nitrification capability, with a relevant contribution due to the first stage [5]. Higher denitrification and total nitrogen removals are achievable with the adoption of a saturation bottom layer [6].…”

Section: Introductionmentioning

confidence: 99%

French Reed Bed as a Solution to Minimize the Operational and Maintenance Costs of Wastewater Treatment from a Small Settlement: An Italian Example

Rizzo¹,

Bresciani²,

Martinuzzi³

et al. 2018

Water

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French Reed Bed (FRB) is a particular constructed wetland (CW) solution which receives raw wastewater. Data from the full-scale FRB wastewater treatment plant of Castelluccio di Norcia (center of Italy) were collected to show the FRB capability to minimize the operational and management (O&M) costs. The system was designed to treat wastewater variable from 200 person equivalent (PE) in off-season up to 1000 PE. Data from 2014 up to 2016 showed high removal efficiency in line with French experiences with FRBs. An interview was conducted with the Water Utility to estimate the operational and maintenance (O&M) costs faced by the WWTP, which allowed us to detail the O&M costs for energy consumption, water quality samples, and personnel for inspection. Other O&M expenditure items were estimated on the basis of parametric costs from the executive design. The FRB O&M costs in euro for 500-1000 PE (6-11 € PE −1 year −1 ) resulted from 5 to 13 lower in comparison to those reported for classical activated sludge systems in an Italian context (45-90 € year −1 ). The low O&M costs are mainly due to the limited energy consumed and to the minimized costs of sludge management.

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Effects of design and operational parameters on ammonium removal by single-stage French vertical flow filters treating raw domestic wastewater

Abstract: 15Four pilot-scale single-stage vertical flow filters (of 2.25m² each), treating raw domestic 16 sewage, were studied over 20 months in order to assess the impact of different designs 17 and operational conditions on treatment efficiency.

Cited by 34 publications

References 23 publications

Effectiveness of pollutants removal in hybrid constructed wetlands – different configurations case study

Effectiveness of pollutants removal in hybrid constructed wetlands – different configurations case study

Nitrogen removal from sewage and septage in constructed wetland mesocosms using sand media amended with biochar

French Reed Bed as a Solution to Minimize the Operational and Maintenance Costs of Wastewater Treatment from a Small Settlement: An Italian Example

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