Industrial wastewater treatment by constructed wetland to estimate water quality index (WQI) of treated wastewater based on fuzzy interface technique

The Integrated Water Resources Management regulations aim to ensure a good status of surface water quality and its sustainable use. Water quality monitoring of various water users supports the identification of pollution sources and their environmental impacts. The priority pollutants generated by wastewater discharges from municipal, industrial wastewater treatment plants or agricultural areas are of great interest due to their eco-toxicological effects and bio-accumulative properties. The aim of this study was to monitor the priority organic and inorganic pollutants from the Siret River basin, in Romania, with the purpose of assessing the surface water quality status and evaluating it by the Water Quality Index (WAWQI) method. The monitoring of inorganic priority pollutants (e.g., As, Cd, Hg, Ni, Pb) and organic priority pollutants (e.g., Naphthalene, Anthracene, Phenanthrene, Fluoranthene, Benzo(a)anthracene, Benzo(b)fluoranthene, Benzo(k)fluoranthene, Benzo(a)pyrene, Benzo(ghi)perylene, Indeno(1,2,3-cd)pyrene, α, β, and γ-Hexachlorocyclohexane, and Di-2-ethyl-hexyl-phthalate) was conducted within the Siret River basin, during the period 2015–2020. With this purpose, 21 sampling points (18 river sections and 3 lakes) were considered to assess the water quality. The results of this study proved that the water quality within the Siret River basin is generally classified in the 2nd or 3rd class. The spatial distribution of the water quality index values, using ARCGIS, also highlighted the fact that the water quality is mostly unsuitable for drinking water supplies, being influenced by the quality of its main tributaries, as well as by the effluent of wastewater treatment plants.

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Membrane Processes For Industrial Wastewater Treatment – Demineralization Station / Membránové Procesy V Technologii Úpravy Průmyslových Odpadních Vod – Demineralizační Stanice

GeoScience Engineering ◽

10.2478/gse-2014-0063 ◽

2013 ◽

Vol 59 (4) ◽

pp. 11-16 ◽

Cited By ~ 1

Author(s):

Jitka Hajduková ◽

Jan Thomas ◽

Petra Malíková ◽

Veronika Matúšková

Keyword(s):

Wastewater Treatment ◽

Water Treatment ◽

Surface Water ◽

Industrial Wastewater ◽

Laboratory Tests ◽

Total Dissolved Solids ◽

Energy Industry ◽

Treated Wastewater ◽

Membrane Processes ◽

Industrial Wastewater Treatment

Abstract The paper deals with treatment of wastewater produced by the energy industry using a membrane processes (electrodialysis). Prior to application of this technology, the influence of wastewater on the chosen type of membranes is solved. Specifically, it means eliminating the influence of formation soluble (insoluble) salts which could negatively affect water treatment by the chosen technology. The paper also summarizes the results of laboratory tests of electrodialysis with the aim to acquire treated wastewater of such quality meeting legislative limits for discharges to surface water (i.e. total dissolved solids below 1g.l-1)

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Evaluation of Water Quality Index (WQI) Performance in Newly Constructed Free Water Surface (FWS) Constructed Wetland for Stormwater Treatment

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.802.623 ◽

2015 ◽

Vol 802 ◽

pp. 623-628

Author(s):

Syafiq Shaharuddin ◽

Aminuddin Ab Ghani ◽

Nor Azazi Zakaria

Keyword(s):

Water Quality ◽

Constructed Wetland ◽

Water Quality Index ◽

Quality Index ◽

Water Surface ◽

Treatment Process ◽

Oxygen Demand ◽

Free Water ◽

Class Ii ◽

Free Water Surface

The newly design free water surface (FWS) constructed wetland (CW) was based on the design recommended in the Urban Stormwater Management Manual for Malaysia (MSMA) 2nd Edition, 2012. The design was apply and completed it construction in April 2014 in Engineering Campus, USM, with approximate area 5166m2. Thus the aim of this study was to evaluate the initial performance of CW, which was evaluated based on the water quality index (WQI). The sampling was conducted from November 2014 until March 2015 and consist of fourteen (14) sampling points into three (3) different zones; forebay zone, macrophytes zones and micropool zone. The parameters measured include percentage saturation dissolved oxygen (DO %), pH, total suspended solid (TSS), biochemical oxygen demand (BOD), chemical oxygen demand (COD) and ammoniacal nitrogen (AN). Based on the result obtained, the highest WQI value was obtained at micropool zone with the range of 78.98-85.45 (82.71±3.35) as the lowest WQI value was obtained at macrophytes zone with the range of 68.13-77.96 (73.25± 3.42). The main treatment process occur in the macrophytes zone is nutrient uptake by emergent plants species as for forebay and micropool zones, main treatment process occur settlement and sedimentation. The result also showed that the removal rate showed difference among each zone; forebay zone was 0.93%, macrophytes zone was 2.79% and micropool zone was 5.64%. Based on the WQI value obtained, forebay and micropool zones fall in Class II and macrophytes fall in Class II and III.

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