Development of a Constructed Wetland for Greywater Treatment for Reuse in Arid Regions: Case Study in Rural Burkina Faso

Water, Journal Year: 2024, Volume and Issue: 16(13), P. 1927 - 1927

Published: July 6, 2024

This study implemented and assessed, over a period of four weeks, full-scale constructed wetland designed to collect treat the greywater for rural household located in an arid environment typical Africa’s Sahel region. The system was from local materials consisted shower room, receiving basin, pre-treatment filter, subsurface horizontal flow planted with Chrysopogon zizanioides. Results showed overall removal organic matter greater than 90%, orthophosphate ammonium were reduced by 73% 60%, respectively, allowing treated water retain some embedded nutrients. efficiency fecal bacteria varied 3.41 (enterococci) 4.19 (fecal coliforms) log10 units which meets World Health Organization Guidelines restricted irrigation. Our assessment technology adds relatively low number studies conducted outside laboratory setting. Furthermore, it supports efforts promote safe reuse underutilized resource at level Sub-Saharan Africa other regions developing world, supporting prospects using agricultural that experience scarcity, climate variability, land degradation.

Language: Английский

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Online Monitoring of a Long-Term Full-Scale Constructed Wetland for the Treatment of Winery Wastewater in Italy

Applied Sciences, Journal Year: 2020, Volume and Issue: 10(2), P. 555 - 555

Published: Jan. 12, 2020

Nature-based solutions, such as Constructed Wetlands (CWs), for the treatment of industrial wastewater can be more efficiently operated making use online monitored parameters inlet/outlet flows and concentrations specific substances. The present study compares different datasets acquired in a two-and-a-half-year-long period by normal laboratory methods also from COD/BOD sensor installed at winery CWs plant Tuscany, Italy. CW (WWTP) is composed of: equalization tank (70 m3); French Reed Bed (1200 m2); horizontal subsurface flow (HF) (960 m2): free water system (850 optional post-treatment sand filter (50 emergency recirculation. obtained average performances this last are COD 97.5%, MBAS 93.1%, N-NO2- 84.7%, NO3- 39.9%, TP 45.5%. has shown excellent performance following concentration patterns along observed period. qualitative quantitative validity measurements been assessed statistical analysis (t-test) reported paper. Online data, every 30 min, availability extreme importance optimization, understanding behavior WWTP operative scenarios, finally driving powering on or off eventual process enhancement tools.

Language: Английский

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Sustainable Dewatering of Industrial Sludges in Sludge Treatment Reed Beds: Experiences from Pilot and Full-Scale Studies under Different Climates

Applied Sciences, Journal Year: 2020, Volume and Issue: 10(21), P. 7446 - 7446

Published: Oct. 23, 2020

Sludge treatment reed beds (STRBs) are an established sludge technology with multiple environmental and economic advantages in dewatering generated during domestic wastewater treatment. However, little is reported regarding their appropriateness efficiency for the of produced industrial from water works. These types may have significantly different quality characteristics than typical contain constituents that could affect dewaterability. Therefore, these usually tested small-scale pilot STRBs before construction full-scale systems. This paper presents summarizes state-of-the-art experience existing STRB systems various countries climates treating sources, evaluates suitability this sustainable technology, proposes required dimensioning efficient operation performance.

Language: Английский

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Assessment of the Treatment Performance of an Open-Air Green Wall Fed with Graywater under Winter Conditions

ACS ES&T Water, Journal Year: 2020, Volume and Issue: 1(3), P. 595 - 602

Published: Dec. 11, 2020

Graywater (GW), i.e., the portion of household wastewater that excludes toilet flushes, is an interesting type because it requires only mild treatment. Green walls have been proposed as example a nature-based solution for GW treatment due to low energy requirement and high ecological/societal benefits; however, indications about their performances remain limited. This work presents experimental results laboratory modular green wall Experiments performed outdoors during winter season three months. Each panel included four vertical columns planted pots, was fed with 100 L synthetic per day. Removal efficiencies were follows (average values): 40% chemical oxygen demand, 97% biochemical 61% total Kjeldhal nitrogen, 56% NO3–-N, 57% phosphorus, 99% Escherichia coli, 63% anionic surfactants. proved potential open-air treating GW, even under challenging conditions biological processes hydraulic loading rates.

Language: Английский

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Microbial Electrochemically Assisted Treatment Wetlands: Current Flow Density as a Performance Indicator in Real-Scale Systems in Mediterranean and Northern European Locations

Frontiers in Microbiology, Journal Year: 2022, Volume and Issue: 13

Published: April 5, 2022

A METland is an innovative treatment wetland (TW) that relies on the stimulation of electroactive bacteria (EAB) to enhance degradation pollutants. The designed in a short-circuit mode (in absence external circuit) using electroconductive bed capable accepting electrons from microbial metabolism Although METlands are proven be highly efficient removing organic pollutants, study situ EAB activity full-scale systems challenge due two-electrode configuration. For first time, four independent were tested for removal pollutants and nutrients, establishing correlation with response generated by presence EAB. efficiency was enhanced plants mixed oxic-anoxic conditions, average 56 g chemical oxygen demand (COD) mbed material-3 day-1 2 total nitrogen (TN) Ørby (partially saturated system). estimated electron current density (J) provides evidence its relationship matter. reached max. values 188.14 mA m-2 (planted system; IMDEA 1), 223.84 (non-planted 2), 125.96 (full 123.01 2). These flow remarkable not energy harvesting unequivocally show how circulate even system. relation between load rate (OLR) at inlet coulombic (CE; %) showed decreasing trend, ranging 8.8 53% (OLR 2.0 16.4 COD day-1) 0.8 2.5% 41.9 45.6 systems. This pattern denotes complex mixtures such as real wastewater high variable OLR should necessarily result CE values. technology validated solution treating decentralized locations.

Language: Английский

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