Effect of media variation on the removal efficiency of pollutants from domestic wastewater in constructed wetland systems

2020 ◽  
Vol 143 ◽  
pp. 105668 ◽  
Author(s):  
Magdi Ebrahim Khalifa ◽  
Yasmeen Gaber Abou El-Reash ◽  
Mohamed I. Ahmed ◽  
Fady W. Rizk
Keyword(s):  
Removal Efficiency ◽  
Constructed Wetland ◽  
Domestic Wastewater

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

Water ◽  
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.

Performance Evaluation of the Horizontal Subsurface Flow Constructed Wetland with Ipomoea Aquatica Plant for Rural Domestic Wastewater Treatment

2014 ◽  
Vol 1073-1076 ◽  
pp. 965-969 ◽  
Author(s):  
Ahmed Mohammed Osman ◽  
Xi Wu Lu
Keyword(s):  
Removal Efficiency ◽  
Constructed Wetland ◽  
Growth Parameters ◽  
Subsurface Flow ◽  
Operation Time ◽  
Domestic Wastewater ◽  
System Operation ◽  
Ipomoea Aquatica ◽  
Subsurface Flow Constructed Wetland ◽  
Horizontal Subsurface Flow

In this study, the performance treatment of horizontal subsurface flow constructed wetland (HSFCW) was evaluated. The HSFCW built as a tertiary treatment process after the biological reactors to improve the effluent quality. The HSFCW system was operated with different hydraulic loading rates (HLRs) ranged from 0.15 to 0.333 m3/ (m2.d) to assess their influence on removal efficiency. During the system operation time, the average temperature was ranged of 22.3 to 31.2 °C and pH ranges was 7.3 – 8.1. The Ipomoea aquatica (Chinese spinach) planted into HSFCW system and the growth parameters during the experimental operation observed. The Ipomoea aquatica growth parameters such as the plant height, a fresh and dry weights were monitored and measured. The influent and effluent of chemical oxygen demand (COD), ammonium nitrogen (NH4-N), total nitrogen (TN) and total phosphorus (TP) were examined. The removal efficiency for all parameters showed decreased with an increase in HLR from 0.15 to 0.333 m3/ (m2.day). The results demonstrated that the average removal efficiency of the COD, NH4-N, TN and TP during system operation is 52.9%, 64.6%, 58.2% and 72.8% respectively. These results confirm that the HSFCW has a good efficient in treatment and can be used for the nutrients and organic matter removal from the domestic wastewater.

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

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.

Treatment of domestic wastewater by vertical flow constructed wetland planted with umbrella sedge and Vetiver grass

2013 ◽  
Vol 68 (6) ◽  
pp. 1345-1351 ◽  
Author(s):  
Suwasa Kantawanichkul ◽  
Somsiri Sattayapanich ◽  
Frank van Dien
Keyword(s):  
Removal Efficiency ◽  
Constructed Wetland ◽  
Plant Biomass ◽  
Oxygen Demand ◽  
Domestic Wastewater ◽  
Nitrogen Accumulation ◽  
Vertical Flow ◽  
Vetiver Grass ◽  
Vetiveria Zizanioides ◽  
Vertical Flow Constructed Wetland

The aim of this study was to investigate the efficiency of wastewater treatment by vertical flow constructed wetland systems under different hydraulic loading rates (HLR). The comparison of two types of plants, Cyperus alternifolius (Umbrella sedge) and Vetiveria zizanioides (Vetiver grass), was also conducted. In this study, six circular concrete tanks (diameter 0.8 m) were filled with fine sand and gravel to the depth of 1.23 m. Three tanks were planted with Umbrella sedge and the other three tanks were planted with Vetiver grass. Settled domestic wastewater from Chiang Mai University (chemical oxygen demand (COD), NH4+-N and suspended solids (SS) of 127.1, 27.4 and 29.5 mg/L on average, respectively) was intermittently applied for 45 min and rested for 3 h 15 min. The HLR of each tank was controlled at 20, 29 and 40 cm/d. It was found that the removal efficiency of the Umbrella sedge systems was higher than the Vetiver grass systems for every parameter, and the lowest HLR provided the maximum treatment efficiency. The removal efficiency of COD and nitrogen in terms of total Kjeldahl nitrogen (TKN) was 76 and 65% at 20 cm/d HLR for Umbrella sedge compared to only 67 and 56% for Vetiver grass. Nitrogen accumulation in plant biomass was also higher in Umbrella sedge than in Vetiver grass in every HLR. Umbrella sedge was thus proved to be a suitable constructed wetland plant in tropical climates.

scholarly journals KINERJA SUBSURFACE CONSTRUCTED WETLAND MULTYLAYER FILTRATION TIPE ALIRAN VERTIKAL DENGAN MENGGUNAKAN TANAMAN AKAR WANGI (Vetivera Zozanoides) DALAM PENYISIHAN BOD DAN COD DALAM AIR LIMBAH KANTIN

2017 ◽  
Vol 1 (2) ◽  
Author(s):  
Ariani Dwi Astuti ◽  
Muhammad Lindu ◽  
Ramadhani Yanidar ◽  
Maria Manda Kleden
Keyword(s):  
Wastewater Treatment ◽  
Removal Efficiency ◽  
Constructed Wetland ◽  
Domestic Wastewater ◽  
Processing Unit ◽  
Vetiver Grass ◽  
Water Stream ◽  
K Value ◽  
Type Flow ◽  
High Concentrations

Wastewater from the canteen is a domestic wastewater that has high concentrations of organic matter that needs to <br />be processed before being released and not contaminating the water stream. The wastewater treatment  at canteen <br />SMA Negeri 34 Jakarta begins with collecting basin and aeration basin, and then it is pumped into two reactor that <br />is the subsurface constructed wetland multilayers filtration type flow vertical with Vetiver Grass unit (SCW-MLF) <br />and multilayers filtration type flow vertical unit without plants (MLF)  as a control. The purpose of this study was <br />to test the effectiveness of the vetiver grass in wastewater treatment with subsurface constructed wetland unit <br />multilayers filtration type vertical flow with vetiver grass to fulfill effluent standards before it is released into stream <br />water. Metodology of the study was conducted from acclimatization of plants, removal the plant to the SCW-MLF <br />unit, and analyze the quality of wastewater. Flowrate that goes into the processing unit is 6.9615 m3/day. The <br />detention time in SCW-MLF unit was 17.7 hours. The results showed that at steady state COD organic loading on <br />SCW-MLF unit is 917.08 to 4126.84 kg COD/ha/day for the removal efficiency around 69.2 to 80.0%, BOD organic <br />loading is 309.78 to 850,73 kg BOD/ha/day for the removal efficiency 61.2 to 70.8%. K value SCW-MLF unit <br />around 0.55 to 0.71 m/day for BOD, 0.57 to 0.89 m /day for COD. The concentration of the wastewater effluent <br />from WWTP are complied to effluent standart regulation (Pergub DKI Jakarta No. 112 Tahun 2005). <br /><br id="tinymce" class="mceContentBody " />

A Batch Activated Sludge Study of Pineapple Wastewater Using a Bioaugmentation Process

1991 ◽  
Vol 24 (5) ◽  
pp. 233-240 ◽  
Author(s):  
Nik Fuaad Nik Abllah ◽  
Aik Heng Lee
Keyword(s):  
Activated Sludge ◽  
Removal Efficiency ◽  
Treatment Plant ◽  
Domestic Wastewater ◽  
Ammonia Nitrogen ◽  
Batch Reactors ◽  
Organic Loading ◽  
Suitable Alternative ◽  
Organic Removal ◽  
Sludge Production

A laboratory study was conducted to determine the feasibility of batch activated sludge reactor for treating pineapple wastewater and to examine the effects of bioaugmentation on treatment performance. The experimental set-up consists of eleven batch reactors. Activated sludge obtained from a wastewater treatment plant treating domestic wastewater was used as seed for the reactors. Synthetic pineapple wastewater was used as feed for the reactors. The eleven reactors were arranged to evaluate the total organic removal, nitrification, and sludge production by bioaugmentation process. Three major factors considered were influent organic loading, ammonia-nitrogen, and dosage of bacterial-culture-product addition. Removal of TOG (total organic carbon), sludge production in terms of SS(suspended solids), and ammonia-nitrogen removal variation are used as evaluation parameters. The TOC removal efficiency after the end of a 48 hour reactor run, for influent TOC of 350.14 to 363.30 mg/l, and 145.92 to 169.66 mg/l, was 94.41 to 95.89%, and 93.72 to 94.73% respectively. Higher organic removal was observed in the bioaugmented reactors with higher organic loading. The better organic removal efficiency in the bioaugmented reactors was probably due to activities of bacteria added. The test results also indicated that sludge yield was enhanced by the bacteria additive and high bacteria dosage produced less sludge. Bioaugmentation was observed to be a suitable alternative for enhancing the biological treatment of pineapple wastewater.

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