scholarly journals Effect of step feeding on the performance of multi-stage vertical flow constructed wetland for municipal wastewater treatment

2017 ◽  
Vol 29 (5) ◽  
pp. 1084-1090
Author(s):  
SHEN Linya ◽  
◽  
WU Juan ◽  
ZHONG Fei ◽  
XIANG Dongfang ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Constructed Wetland ◽  
Municipal Wastewater ◽  
Vertical Flow ◽  
Municipal Wastewater Treatment ◽  
Multi Stage ◽  
Vertical Flow Constructed Wetland

Design and operation of an eco-system for municipal wastewater treatment and utilization

2006 ◽  
Vol 54 (11-12) ◽  
pp. 429-436 ◽  
Author(s):  
L. Wang ◽  
J. Peng ◽  
B. Wang ◽  
L. Yang
Keyword(s):  
Wastewater Treatment ◽  
Constructed Wetland ◽  
Municipal Wastewater ◽  
Activated Sludge Process ◽  
Municipal Wastewater Treatment ◽  
Annual Average ◽  
Total Capital ◽  
Dongying City ◽  
Final Effluent ◽  
Better Than

An eco-system consisting of integrated ponds and constructed wetland systems is employed in Dongying City, Shandong Province for the treatment and utilization of municipal wastewater with design capacity of 100,000 m3/d. The total capital cost of this system is 680 Yuan (RMB) or US$82/m3/d, or about half that of the conventional system based on activated sludge process, and the O/M cost is 0.1 Yuan (RMB) or US$ 0.012/m3, only one fifth that of conventional treatment systems. The performance of the wastewater treatment and utilization eco-system is quite good with a final effluent COD, BOD, SS, NH3-N and TP of 45–65 mg/l, 7–32 mg/l, 12–35 mg/l, 2–13 mg/l and 0.2–1.8 mg/l respectively and the annual average removals of COD, BOD, SS, NH3-N and TP are 69.1%, 78.3%, 76.4%, 62.1% and 52.9% respectively, which is much better than that of conventional pond system or constructed wetland used separately and illustrates that the artificial and integrated eco-system is more effective and efficient than the simple natural eco-system.

Potential use of mangrove plantation as constructed wetland for municipal wastewater treatment

2003 ◽  
Vol 48 (5) ◽  
pp. 257-266 ◽  
Author(s):  
K. Boonsong ◽  
S. Piyatiratitivorakul ◽  
P. Patanaponpaiboon
Keyword(s):  
Wastewater Treatment ◽  
Constructed Wetland ◽  
Municipal Wastewater ◽  
Free Water ◽  
Avicennia Marina ◽  
Pilot Scale ◽  
Natural Forest ◽  
Municipal Wastewater Treatment ◽  
Detention Time ◽  
Bruguiera Cylindrica

The study evaluated the possibility of using mangrove plantation to treat municipal wastewater. Two types of pilot scale (100 × 150 m2) free water surface constructed wetland were set up. One system was a natural Avicennia marina dominated forest system. The other system was a newly planted system in which seedlings of Rhizophora spp., A. marina, Bruguiera cylindrica and Ceriops tagal were planted in 4 strips. Municipal wastewater was retained within the systems for 7 and 3 days, respectively. The results indicated that the average removal percentage of TSS, BOD, NO3-N, NH4-N, TN, PO4-P and TP in the newly planted system were 27.6-77.1, 43.9-53.9, 37.6-47.5, 81.1-85.9, 44.8-54.4, 24.7-76.8 and 22.6-65.3, respectively. Whereas the removal percentage of those parameters in the natural forest system were 17.1-65.9, 49.5-51.1, 44.0-60.9, 51.1-83.5, 43.4-50.4, 28.7-58.9 and 28.3-48.0, respectively. Generally, the removal percentages within the newly planted system and the natural forest system were not significantly different. However, when the removal percentages were compared with detention time, TSS, PO4-P and TP percentages removed were significantly higher in the 7-day detention time treatment. Even though the removal percentages were highly varied and temporally dependent, the overall results showed that mangrove plantation could be used as constructed wetland for municipal wastewater treatment in a similar way to the natural mangrove system.

scholarly journals Performance monitoring of a vertical flow constructed wetland treating municipal wastewater

2013 ◽  
Vol 9 (3) ◽  
pp. 277-285
Keyword(s):  
Water Quality ◽  
Constructed Wetland ◽  
Performance Monitoring ◽  
Municipal Wastewater ◽  
Monitoring Program ◽  
Vertical Flow ◽  
Total Coliforms ◽  
Vertical Flow Constructed Wetland ◽  
Reliable Performance ◽  
Removal Efficiencies

A two-year monitoring program was undertaken in a vertical flow constructed wetland treating wastewater from Gomati, a village in Chalkidiki, North Greece. This constructed wetland operates since 2003. The monitoring campaigns were organized every 15 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. Measured mean removal efficiencies were as follows: 92.3% for BOD, 91.7% for COD, 80.3% for TKN, 87.5% for ΝΗ4 +, 61.3% for TP, 45.7% for ortho-phosphates, 93.2% for TSS and 99.9% for total coliforms, which suggests a satisfactory and reliable performance of such systems in Greece. The paper presents facility description, study details and monitoring results.

Treatment of olive mill and municipal wastewater mixture by pilot scale vertical flow constructed wetland

2020 ◽  
Vol 198 ◽  
pp. 126-139
Author(s):  
Ayoub El Ghadraoui ◽  
Naaila Ouazzani ◽  
Abdelaali Ahmali ◽  
Tawfiq El Hakim El Mansour ◽  
Faissal Aziz ◽  
...  
Keyword(s):  
Constructed Wetland ◽  
Municipal Wastewater ◽  
Pilot Scale ◽  
Vertical Flow ◽  
Vertical Flow Constructed Wetland ◽  
Olive Mill

scholarly journals Innovative Multistage Constructed Wetland for Municipal Wastewater Treatment and Reuse for Agriculture in Senegal

Water ◽  
2020 ◽  
Vol 12 (11) ◽  
pp. 3139
Author(s):  
Antonina Torrens ◽  
David de la Varga ◽  
Abdou Khafor Ndiaye ◽  
Montserrat Folch ◽  
Adrien Coly
Keyword(s):  
Constructed Wetland ◽  
Water Reuse ◽  
Municipal Wastewater ◽  
Cost Effective ◽  
Vertical Flow ◽  
Waterborne Diseases ◽  
Municipal Wastewater Treatment ◽  
Saint Louis ◽  
Egg Removal ◽  
Microbiological Indicators

This paper reports on the performance of using a multistage constructed wetland (CW) to treat municipal raw wastewater and an analysis of its suitability for agricultural irrigation. The pilot plant consists of two stages of vertical flow CWs plus one stage of a horizontal CW built in 2018 with different local materials at the Gaston Berger University Campus, Saint Louis (Senegal). Each CW stage is composed of several filters with different type of media (silex, granite, or river gravel), filtering media depths, and macrophytes (Phragmites and Typha). The physicochemical and microbiological indicators were monitored over six months at each bed inlet and outlet to evaluate the efficiency and achievements of the Senegalese, European, and WHO regulations/recommendations for disposal or reuse in irrigation. This study demonstrates the viability of this new multistage CW design to treat raw municipal wastewater and produce an effluent of good quality suitable for reuse in agriculture. The removal of organic matter, suspended solids, and nutrients was very high (>95% for SS, BOD5 and N-NH4+, >90% for COD and P-PO43−), as was the reduction of microbiological indicators (fecal coliform reduction >5 log units and helminth egg removal of 100%). First, trends related to the influence of design (the type of gravel, filter depth, and type of macrophyte), operational modes, and the CW treatment efficiency were determined. The use of non-crushed gravel and Typha spp. seemed to provide better removal rates. On the contrary, no differences were found between the use of silex or granite gravel. For the studied Senegalese conditions under dry and hot climates, the preliminary results indicate that no resting periods are necessary for vertical flow CWs (VFCWs), thus resulting in a reduction in construction and operation costs. The main outcome of our study is evidence that multistage CWs can provide robust, cost-effective treatments, as well as allow for safe water reuse, which is imperative in areas with severe water scarcity and endemic microbiological waterborne diseases.

MUNICIPAL WASTEWATER TREATMENT IN AN ANAEROBIC DIGESTER‐CONSTRUCTED WETLAND SYSTEM

2008 ◽  
Vol 29 (11) ◽  
pp. 1249-1256 ◽  
Author(s):  
I. Ruiz ◽  
J. A. Álvarez ◽  
M. A. Díaz ◽  
L. Serrano ◽  
M. Soto
Keyword(s):  
Wastewater Treatment ◽  
Constructed Wetland ◽  
Municipal Wastewater ◽  
Anaerobic Digester ◽  
Municipal Wastewater Treatment ◽  
Wetland System
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