Treatment of WASTEWATER from the Tannery Industry in a Constructed Wetland Planted with Phragmites australis

Constructed wetlands (CWs) can remove a high amount of pollutants from wastewater, and therefore play an important role in water purification. In this study, a pilot system to improve the traditional treatment of industrial wastewater from the tannery industry was tested. The main objective of this research was to remove nitrogen, phosphorus, boron, and chromium from a tannery’s industrial wastewater using a horizontal subsurface flow constructed wetland (HSSFCW) formed from three cells, planted with Phragmites australis and operated in batch mode as an ecofriendly system. P. australis was selected due to its ability to adapt to climatic conditions, its wetland and management characteristics, and its high capacity for pollutant absorption. The concentrations of total Kjeldahl nitrogen (TKN), total phosphorus (TP), boron (B), and chromium (Cr) were analyzed in both wastewater and purified water, and the removal efficiencies were calculated. In addition, both the absorption capacity of P. australis in the aerial and root parts and the adsorption capacity of substrates (gravel and washed sand) were analyzed. Results showed that the concentrations of TP and Cr decreased in the wastewater at both hydraulic retention times (HRTs) tested (3 and 7 days), with 3 days being the most effective, showing removal efficiency values of 78% and 48% for TP and Cr, respectively. However, concentrations of TKN and B were not statistically reduced at either HRTs. Regarding the absorption capacity of P. australis, the highest absorption efficiencies for TKN and TP were reported at 7 days in the aerial part of the plants. In contrast, B was retained in roots at HRT of 3 days. Finally, Cr was more significantly absorbed at 3 days by P. australis. Moreover, the substrates also played important roles in the adsorption of nitrogen and boron. Therefore, CWs planted with P. australis could be used as an ecofriendly technique to the reduce pollution load of the wastewater from tannery industry, especially for P and Cr, although in order to increase the removal efficiency of B and N, the combination with other plant species and different retention times should be tested.

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Performance of sewage treatment plant with septic tank, anaerobic filter and constructed wetland with Typha spp

Ambiente e Agua - An Interdisciplinary Journal of Applied Science ◽

10.4136/ambi-agua.2305 ◽

2019 ◽

Vol 14 (7) ◽

pp. 1

Author(s):

Paulo Fortes Neto ◽

Nara Lucia Perondi Fortes ◽

Elizabeth Da Costa Neves Fernandes de Almeida Duarte ◽

Rita Do Amaral Fragoso ◽

Ana Catarina Marcos Henriques ◽

...

Keyword(s):

Removal Efficiency ◽

Constructed Wetland ◽

Sewage Treatment ◽

Sewage Treatment Plant ◽

Treatment Plant ◽

Climatic Conditions ◽

Effluent Treatment ◽

Septic Tank ◽

Anaerobic Filter ◽

Before And After

The study reports the performance of a sanitary effluent treatment constituted by a septic tank, anaerobic filter and constructed wetland. The study monitored nutrient’s, carbonaceous material’s and thermotolerant coliform’s (CT) removal efficiency during 12 months. The treatment system included a septic tank, an anaerobic filter and a horizontal subsurface flow constructed wetland cultivated with Typha spp. Effluent samples were monthly collected before and after the septic tank, anaerobic filter and wetland. The removal efficiency for N-NH+4 was 37.6%, 66.3% for total P, 37% for COD, 54% for BOD and 99.4% for CT. The anaerobic filter and wetland were more efficient than the septic tank. P-total reduction was higher in the constructed wetland than in the anaerobic filter. Climatic conditions influenced the evaluated constituent’s removal being the highest values during hot months.

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PENYISIHAN KADAR AMONIAK PADA LIMBAH CAIR DOMESTIK DENGAN MENGGUNAKAN SISTEM CONSTRUCTED WETLAND BIO-RACK

Jukung (Jurnal Teknik Lingkungan) ◽

10.20527/jukung.v6i1.8235 ◽

2020 ◽

Vol 6 (1) ◽

Author(s):

Muhammad Al Kholif ◽

Sugito Sugito

Keyword(s):

Phragmites Australis ◽

Removal Efficiency ◽

Residence Time ◽

Constructed Wetland ◽

Typha Latifolia ◽

Domestic Wastewater ◽

Ammonia Content ◽

Test Parameters ◽

Laboratory Procedures ◽

Wetland System

Penelitian ini bertujuan mengkaji efisiensi jenis tanaman dan waktu tinggal dalam menurunkan kandungan amoniak pada air limbah domestik menggunakan Bio-Rack Wetland. Bio-rack merupakan sistem baru dalam media pengolahan constructed wetland. Bio-rack wetland dijalankan dengan variasi waktu tinggal selama 15 jam dan 20 jam. Media bio-rack terbuat dari pipa PVC dengan ukuran diameter 22 mm. Tumbuhan yang ditanam pada media bio-rack adalah Typha latifolia dan Phragmites australis. Efisiensi penyisihan suhu, pH, dan amoniak pada reaktor bio-rack wetland dilakukan berdasarkan prosedur laboratorium. Efisiensi sistem bio-rack wetland yang terbaik dalam menyisihkan pencemar amoniak yaitu tanaman Typha latifolia dengan efisiensi penyisihan sebesar 35,2% pada waktu tinggal 20 jam. Sedangkan pada tanaman Phragmites australis mampu menyisihkan kadar amoniak sebesar 28,4% dengan waktu tinggal 20 jam. Efisiensi penyisihan parameter uji terbukti lebih baik pada bio-rack wetland dengan tanaman Typha latifolia pada waktu tinggal 20 jam. Kata Kunci: Amoniak, Bio-rack Wetland, Phragmites australis, Typha latifolia, Waktu Tinggal. This study aims to assess the efficiency of plant species and residence time in reducing ammonia content in domestic wastewater using Bio-Rack Wetland. Bio-rack is a new system in the constructed wetland processing media. Wetland bio-rack is run with a variation of the residence time of 15 hours and 20 hours. Bio-rack media is made of PVC pipes with a diameter of 22 mm. Plants grown on bio-rack media are Typha latifolia and Phragmites australis. The removal efficiency of temperature, pH, and ammonia in the wetland bio-rack reactor is carried out based on laboratory procedures. The best efficiency of the bio-rack wetland system in removing ammonia pollutants is Typha latifolia plants with a removal efficiency of 35.2% at a residence time of 20 hours. Whereas the Phragmites australis plant can set aside ammonia levels of 28.4% with a residence time of 20 hours. The removal efficiency of the test parameters was proven to be better in the wetland bio-rack with Typha latifolia plants at a residence time of 20 hours. Keywords: Ammonia, Bio-rack Wetland, Phragmites australis, Typha latifolia, the length of time.

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Treatment of municipal wastewater by vertical subsurface flow constructed wetland: Data collection on removal efficiency using Phragmites Australis and Cyperus Papyrus

Data in Brief ◽

10.1016/j.dib.2020.105584 ◽

2020 ◽

Vol 30 ◽

pp. 105584

Author(s):

Fernando García-Ávila

Keyword(s):

Data Collection ◽

Phragmites Australis ◽

Removal Efficiency ◽

Constructed Wetland ◽

Municipal Wastewater ◽

Subsurface Flow ◽

Cyperus Papyrus ◽

Subsurface Flow Constructed Wetland

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HARVESTING EFFECTS ON BIOMASS AND NUTRIENT RETENTION IN Phragmites australis IN A FREE-WATER SURFACE CONSTRUCTED WETLAND IN WESTERN IRELAND

Biology & Environment Proceedings of the Royal Irish Academy ◽

10.3318/bioe.2007.107.3.139 ◽

2007 ◽

Vol 107 (3) ◽

pp. 139-145 ◽

Cited By ~ 2

Author(s):

M. G. Healy ◽

J. Newell ◽

M. Rodgers

Keyword(s):

Phragmites Australis ◽

Constructed Wetland ◽

Water Surface ◽

Free Water ◽

Nutrient Retention ◽

Free Water Surface ◽

Western Ireland

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Treatment of Combined Dairy and Domestic Wastewater with Constructed Wetland System in Sicily (Italy). Pollutant Removal Efficiency and Effect of Vegetation

Water ◽

10.3390/w13081086 ◽

2021 ◽

Vol 13 (8) ◽

pp. 1086

Author(s):

Mario Licata ◽

Roberto Ruggeri ◽

Nicolò Iacuzzi ◽

Giuseppe Virga ◽

Davide Farruggia ◽

...

Keyword(s):

Plant Growth ◽

Organic Compounds ◽

Removal Efficiency ◽

Constructed Wetland ◽

Organic Pollutant ◽

Dairy Farm ◽

Domestic Wastewater ◽

Pollutant Removal ◽

Dairy Wastewater ◽

Giant Reed

Dairy wastewater (DWW) contains large amounts of mineral and organic compounds, which can accumulate in soil and water causing serious environmental pollution. A constructed wetland (CW) is a sustainable technology for the treatment of DWW in small-medium sized farms. This paper reports a two-year study on the performance of a pilot-scale horizontal subsurface flow system for DWW treatment in Sicily (Italy). The CW system covered a total surface area of 100 m2 and treated approximately 6 m3 per day of wastewater produced by a small dairy farm, subsequent to biological treatment. Removal efficiency (RE) of the system was calculated. The biomass production of two emergent macrophytes was determined and the effect of plant growth on organic pollutant RE was recorded. All DWW parameters showed significant differences between inlet and outlet. For BOD5 and COD, RE values were 76.00% and 62.00%, respectively. RE for total nitrogen (50.70%) was lower than that of organic compounds. RE levels of microbiological parameters were found to be higher than 80.00%. Giant reed produced greater biomass than umbrella sedge. A seasonal variation in RE of organic pollutants was recorded due to plant growth rate Our findings highlight the efficient use of a CW system for DWW treatment in dairy-cattle farms.

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Highly absorbent hydrogels comprised from interpenetrated networks of alginate–polyurethane for biomedical applications

Journal of Materials Science Materials in Medicine ◽

10.1007/s10856-021-06544-4 ◽

2021 ◽

Vol 32 (6) ◽

Author(s):

Jesús A. Claudio-Rizo ◽

Nallely Escobedo-Estrada ◽

Sara L. Carrillo-Cortes ◽

Denis A. Cabrera-Munguía ◽

Tirso E. Flores-Guía ◽

...

Keyword(s):

Biomedical Applications ◽

Degradation Rate ◽

High Capacity ◽

Hydrolytic Degradation ◽

Absorption Capacity ◽

Amide Bonds ◽

E Coli ◽

Swelling Capacity ◽

And Storage ◽

Potential Area

AbstractDeveloping new approaches to improve the swelling, degradation rate, and mechanical properties of alginate hydrogels without compromising their biocompatibility for biomedical applications represents a potential area of research. In this work, the generation of interpenetrated networks (IPN) comprised from alginate–polyurethane in an aqueous medium is proposed to design hydrogels with tailored properties for biomedical applications. Aqueous polyurethane (PU) dispersions can crosslink and interpenetrate alginate chains, forming amide bonds that allow the structure and water absorption capacity of these novel hydrogels to be regulated. In this sense, this work focuses on studying the relation of the PU concentration on the properties of these hydrogels. The results indicate that the crosslinking of the alginate with PU generates IPN hydrogels with a crystalline structure characterized by a homogeneous smooth surface with high capacity to absorb water, tailoring the degradation rate, thermal decomposition, and storage module, not altering the native biocompatibility of alginate, providing character to inhibit the growth of E. coli and increasing also its hemocompatibility. The IPN hydrogels that include 20 wt.% of PU exhibit a reticulation index of 46 ± 4%, swelling capacity of 545 ± 13% at 7 days of incubation at physiological pH, resistance to both acidic and neutral hydrolytic degradation, mechanical improvement of 91 ± 1%, and no cytotoxicity for monocytes and fibroblasts growing for up to 72 h of incubation. These results indicate that these novel hydrogels can be used for successful biomedical applications in the design of wound healing dressings.

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