Selection of Suitable Filter Materials for Horizontal Subsurface Flow Constructed Wetland Treating Swine Wastewater

2020 ◽  
Vol 231 (2) ◽  
Author(s):  
Bui Thi Kim Anh ◽  
Nguyen Van Thanh ◽  
Nguyen Minh Phuong ◽  
Nguyen Thi Hoang Ha ◽  
Nguyen Hong Yen ◽  
...  
Keyword(s):  
Constructed Wetland ◽  
Subsurface Flow ◽  
Swine Wastewater ◽  
Filter Materials ◽  
Subsurface Flow Constructed Wetland ◽  
Horizontal Subsurface Flow ◽  
Selection Of

scholarly journals Coliform removal in a constructed wetland system used in post-swine effluent treatment

2019 ◽  
Vol 14 (5) ◽  
pp. 1 ◽  
Author(s):  
Fabiana De Amorim ◽  
Jaíza Ribeiro Mota e Silva ◽  
Ronaldo Fia ◽  
Luiz Fernando Coutinho de Oliveira ◽  
Cláudio Milton Montenegro Campos
Keyword(s):  
Constructed Wetland ◽  
Subsurface Flow ◽  
Experimental System ◽  
Effluent Treatment ◽  
Swine Wastewater ◽  
Subsurface Flow Constructed Wetland ◽  
In Series ◽  
Wetland System ◽  
Horizontal Subsurface Flow ◽  
Stage 1

This study evaluated the efficiency of a constructed wetland system (CWS) in removing total coliforms (TC) and thermotolerant coliforms (ThC) of swine wastewater, as a complementary treatment to an anaerobic system. At Stage 1, the experimental system was combined using a vertical flow constructed wetland system (VFCWS) cultivated with Tifton 85 grass in series with a horizontal subsurface flow constructed wetland system (HFCWS1) cultivated with Taboa. In HFCWS1, the hydraulic detention times (HDT) were 4.7, 3.1 and 2.3 days and the surface application rates (SAR) were 294, 319 and 397 kg ha-1 d-1 of COD, in Phases I, II and III, respectively. At Stage 2, the experimental system was combined using a horizontal subsurface flow constructed wetland system (HFCWS2) cultivated with Tifton 85 grass, HDT were 6.1, 2.0 and 0.5 days and the SAR were 850, 656 and 6.34 kg ha-1 d-1 of COD, in Phases I, II and III, respectively. In Stage 1, it was verified that the VFCWS was more efficient in coliform removal when compared to HFCWS1. When only HFCWS were compared, coliform removal in Stage 1 was between 1 and 2 log units in HFCWS1. In the stage 2, the HFCWS2 was more limited, with the highest removal efficiencies during Phase I of 1.6 and 0.8 log units for TC and ThC, respectively. In general, the association resulted in efficiencies that ranged from 96.4 to 99.0% for TC, 94.2 and 97.6% for ThC, equivalent to the average removal of 1.2 to 2 log units, considered satisfactory.

On-site treatment of domestic wastewater using a small-scale horizontal subsurface flow constructed wetland

2010 ◽  
Vol 62 (3) ◽  
pp. 603-614 ◽  
Author(s):  
G. D. Gikas ◽  
V. A. Tsihrintzis
Keyword(s):  
Constructed Wetland ◽  
Rural Areas ◽  
Subsurface Flow ◽  
Monitoring Program ◽  
Statistical Testing ◽  
Small Scale ◽  
Single Family ◽  
Subsurface Flow Constructed Wetland ◽  
Removal Efficiencies ◽  
Horizontal Subsurface Flow

A small-scale horizontal subsurface flow constructed wetland, located in North Greece, was designed and constructed to treat wastewater from a single-family residence. A three-year monitoring program was undertaken to evaluate the performance of this system. The monitoring campaigns were organized every 7 days. Water quality samples were collected at the inlet, at intermediate points (i.e. at the end of each treatment stage) and at the outlet of the system. Temperature, electrical conductivity, pH and DO were measured in-situ with the use of appropriate instruments at the same points of water sample collection. Water samples were analyzed for BOD, COD, TKN, ammonia, nitrate, nitrite, total phosphorus (TP), ortho-phosphate (OP), total suspended solids (TSS) and total coliforms (TC). Mean removal efficiencies for the monitoring period were: 86.5% for BOD, 84.6% for COD, 83.7% for TKN, 82.2% for ammonia, 63.1% for OP, 63.3% for TP, 79.3% for TSS and 99.9% for TC. Furthermore, based on statistical testing, TKN, ammonia and TP removal efficiencies showed dependence on temperature. The paper presents facility description, study details and monitoring results. The study shows that the use of constructed wetlands in wastewater treatment is a good option for single-family residences in rural areas.

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