Preliminary research on efficiency of organic substances removal from wastewater in selected constructed wetlands

2011 ◽  
Vol 6 (3) ◽  
Author(s):  
K. Pawęska ◽  
B. Malczewska
Keyword(s):  
Wastewater Treatment ◽  
Development Strategy ◽  
Constructed Wetlands ◽  
High Efficiency ◽  
Waste Treatment ◽  
Organic Pollution ◽  
Pollutant Removal ◽  
Economic Resources ◽  
Treatment Efficiency ◽  
Rural Regions

Protection of ground water is one of basic purposes of suitable development strategy. The technical infrastructure is one of examples of this strategy realization. However, in rural regions, that are characterized by housing dispersion, it is difficult to construct conventional sewage system. This problem has to do with violent changes of wastewater discharge and effluent concentration as well as economic resources. Constructed wetlands could be a good solution for rural regions. They enable waste treatment and protecting receiving water. Constructed wetlands work like a marsh and they act as biofilters removing environmental effluents from wastewater. They can be a solution for rural regions and allow rational and inexpensive method of wastewater treatment. The main purpose of this research was to determine efficiency of decontamination of organic pollution, expressed as BOD5 and COD. The data was collected from constructed wetlands in Kletno and Brzezno in order to extract design criteria for BOD5 and COD removal. The research was executed on two object assigned to popular touristic places. Constructed wetlands keep high pollutant removal efficiency on the same level all year round. The research was conducted in 2008. Constructed wetlands do not ensure high efficiency of treatment. Unsuitable exploitation is the primary reason for decreasing efficiency. Proper exploitation of settler (septic tanks) in constructed wetlands is responsible for high wastewater treatment efficiency.

Area-based speciation kinetic analysis of the multipollutant removal in Constructed Wetlands to enhance its treatment efficiency

2021 ◽  
Author(s):  
Manoj Kumar ◽  
Rajesh Singh
Keyword(s):  
Wastewater Treatment ◽  
Kinetic Analysis ◽  
Constructed Wetlands ◽  
Municipal Wastewater ◽  
Zero Order ◽  
Pollutant Removal ◽  
Municipal Wastewater Treatment ◽  
Treatment Efficiency ◽  
First Order ◽  
Present Study Area

In the present study area-based, pollutant removal kinetic analysis was considered using the Zero-order, first-order decay and efficiency loss (EL) models in the constructed wetlands (CWs) for municipal wastewater treatment....

Evaluation of Small Wastewater Treatment Plants in the County of Århus – Denmark

1993 ◽  
Vol 28 (10) ◽  
pp. 33-41
Author(s):  
Jes la Cour Jansen ◽  
Bodil Mose Pedersen ◽  
Erik Moldt
Keyword(s):  
Wastewater Treatment ◽  
Constructed Wetlands ◽  
Biological Treatment ◽  
Wastewater Treatment Plants ◽  
Chemical Precipitation ◽  
Common Type ◽  
Treatment Efficiency ◽  
Effluent Quality ◽  
Different Types

Influent and effluent data from about 120 small wastewater treatment plants (100 - 2000 PE) have been collected and processed. Seven different types of plants are represented. The effluent quality and the treatment efficiency have been evaluated. The most common type of plant is mechanical/biological treatment plants. Some of them are nitrifying and some are also extended for chemical precipitation of phosphorus. Constructed wetlands and biological sandfilters are also represented among the small wastewater treatment plants.

Seeking a way to promote the use of constructed wetlands for domestic wastewater treatment in developing countries

2011 ◽  
Vol 63 (4) ◽  
pp. 654-659 ◽  
Author(s):  
F. Zurita ◽  
M. A. Belmont ◽  
J. De Anda ◽  
J. R. White
Keyword(s):  
Developing Countries ◽  
Wastewater Treatment ◽  
Constructed Wetlands ◽  
Subsurface Flow ◽  
Domestic Wastewater ◽  
Treatment Efficiency ◽  
Zantedeschia Aethiopica ◽  
Domestic Wastewater Treatment ◽  
Anthurium Andreanum ◽  
Strelitzia Reginae

The aim of this study was to evaluate the domestic wastewater treatment efficiency as well as the survivability of commercially valuable ornamental plants in subsurface flow wetlands (SSFW) for domestic wastewater (DWW) treatment in laboratory and pilot wetland studies. The laboratory scale study included five different species (Zantedeschia aethiopica, Strelitzia reginae, Anthurium andreanum, Canna hybrids and Hemmerocallis dumortieri) that were evaluated in horizontal flow subsurface treatment cells. All the plants survived during the 6-month experimental period demonstrating high wetland nutrient treatment efficiency. In order to validate and expand these preliminary results, a pilot-scale wetland study was carried out in SSFWs under two different flow regimes (horizontal and vertical flow). Four ornamental species were tested during a 1-year period: Zantedeschia aethiopica, Strelitzia reginae, Anthurium andreanum and Agapanthus africanus. The removal efficiencies were significantly higher in the vertical subsurface-flow constructed wetlands (VFCW) for all pollutants, except for nitrate (NO3-N), total nitrogen (TN) and total suspended solids (TSS). These results show that it is feasible to use select non-wetland plants with high market value in SSFWs without reducing the efficiency of the wastewater treatment system, although future work should continue in order to apply this technology in a large scale. The added value of floriculture in treatment wetlands can help to promote the use of constructed wetlands (CW) for domestic wastewater treatment in developing countries where economical resources are scarce and water pollution with DWW is common.

scholarly journals Effects of Elevated Atmospheric CO2 Concentration on Phragmites australis and Wastewater Treatment Efficiency in Constructed Wetlands

Water ◽  
2021 ◽  
Vol 13 (18) ◽  
pp. 2500
Author(s):  
Zongshuai Wang ◽  
Shuxin Li ◽  
Shengqun Liu ◽  
Fahong Wang ◽  
Lingan Kong ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Phragmites Australis ◽  
Constructed Wetlands ◽  
Co2 Concentration ◽  
Atmospheric Co2 ◽  
Treatment Efficiency ◽  
Monooxygenase Activity ◽  
Physiological Performance ◽  
Elevated Atmospheric Co2 ◽  
Atmospheric Co2 Concentration

Elevated atmospheric CO2 concentration (e[CO2]) has been predicted to rise to more than 400 ppm by the end of this century. It has received extensive attention with regard to the pros and cons of e[CO2] effects in terrestrial and marine ecosystems, while the effects of e[CO2] on wastewater treatment efficiency in constructed wetlands (CWs) are rarely known. In this study, the atmospheric CO2 concentration was set as 400 ppm (that is, ambient [CO2]) and 800 ppm (that is, e[CO2]). The physiological performance of Phragmites australis and microbial enzyme activities in constructed wetlands in response to e[CO2] were tested. Significantly higher net photosynthetic rate and plant growth were found under e[CO2]. The concentrations of nitrate, total anions, and total ions in the xylem sap of Phragmites australis were reduced, while the uptake of N and P in plants were not affected under e[CO2] condition. In addition, the ammonia monooxygenase activity was reduced, while the phosphatase activity was enhanced by e[CO2]. The increased removal efficiency of chemical oxygen demand and total nitrogen in CWs could be ascribed to the changes in physiological performance of Phragmites australis and activities of microbial enzymes under e[CO2]. These results suggested that the future atmospheric CO2 concentration could affect the wastewater treatment efficiency in CWs, due to the direct effects on plants and microorganisms.

Investigation of protozoa as indicators of wastewater treatment efficiency in constructed wetlands

Desalination ◽  
2010 ◽  
Vol 250 (1) ◽  
pp. 378-382 ◽  
Author(s):  
C.A. Papadimitriou ◽  
A. Papatheodoulou ◽  
V. Takavakoglou ◽  
A. Zdragas ◽  
P. Samaras ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Constructed Wetlands ◽  
Treatment Efficiency

scholarly journals Role of Wetland Plants and Use of Ornamental Flowering Plants in Constructed Wetlands for Wastewater Treatment: A Review

2019 ◽  
Vol 9 (4) ◽  
pp. 685 ◽  
Author(s):  
Luis Sandoval ◽  
Sergio Zamora-Castro ◽  
Monserrat Vidal-Álvarez ◽  
José Marín-Muñiz
Keyword(s):  
Wastewater Treatment ◽  
North America ◽  
Constructed Wetlands ◽  
Urban Areas ◽  
Ornamental Plants ◽  
Flowering Plants ◽  
Wetland Plants ◽  
Pollutant Removal ◽  
Natural Wetland ◽  
Natural Wetlands

The vegetation in constructed wetlands (CWs) plays an important role in wastewater treatment. Popularly, the common emergent plants in CWs have been vegetation of natural wetlands. However, there are ornamental flowering plants that have some physiological characteristics similar to the plants of natural wetlands that can stimulate the removal of pollutants in wastewater treatments; such importance in CWs is described here. A literature survey of 87 CWs from 21 countries showed that the four most commonly used flowering ornamental vegetation genera were Canna, Iris, Heliconia and Zantedeschia. In terms of geographical location, Canna spp. is commonly found in Asia, Zantedeschia spp. is frequent in Mexico (a country in North America), Iris is most commonly used in Asia, Europe and North America, and species of the Heliconia genus are commonly used in Asia and parts of the Americas (Mexico, Central and South America). This review also compares the use of ornamental plants versus natural wetland plants and systems without plants for removing pollutants (organic matter, nitrogen, nitrogen and phosphorous compounds). The removal efficiency was similar between flowering ornamental and natural wetland plants. However, pollutant removal was better when using ornamental plants than in unplanted CWs. The use of ornamental flowering plants in CWs is an excellent option, and efforts should be made to increase the adoption of these system types and use them in domiciliary, rural and urban areas.

Use of constructed wetlands to process agricultural wastewater

1998 ◽  
Vol 78 (2) ◽  
pp. 199-210 ◽  
Author(s):  
Hans G. Peterson
Keyword(s):  
Wastewater Treatment ◽  
Constructed Wetlands ◽  
Pollutant Removal ◽  
Regulatory Agencies ◽  
Quality Improvements ◽  
Agricultural Wastewater ◽  
Agricultural Community ◽  
Run Off ◽  
Wetland Treatment ◽  
Natural Wetlands

Constructed wetlands are emerging as a serious challenge to conventional wastewater treatment because of lower construction and operating costs, less requirement for trained personnel, more flexibility, and lower susceptibility to variations in waste loading rates. Water quality improvements can be achieved by removal of plant nutrients, such as N and P, organics (natural and manmade) as well as inorganic contaminants. Wetland treatment is now advocated by regulatory agencies and has been determined as the technology of choice by municipalities and industries required to meet stringent discharge regulations. These same regulations have not usually been imposed on the agricultural community, but deteriorating water sources will likely change this regulatory anomaly. Use of this technology in treating agricultural wastewater is still in its infancy with few, although rapidly expanding, applications. This paper aims to highlight different aspects of wetland treatment by exploring its use for the treatment of agricultural run-off as well as wastewater from the agri-food industry. It is concluded that natural wetlands will be quite limited in absorbing agricultural wastewater while constructed wetlands can be designed for optimum pollutant removal. Key words: Constructed wetlands, wastewater treatment, agriculture, food processing, nutrient removal, nitrogen, phosphorus, organics

scholarly journals Modeling of Pollutants Removal in Subsurface Vertical Flow and Horizontal Flow Constructed Wetlands

Water ◽  
2019 ◽  
Vol 11 (1) ◽  
pp. 180 ◽  
Author(s):  
Wojciech Dąbrowski ◽  
Beata Karolinczak ◽  
Paweł Malinowski ◽  
Dariusz Boruszko
Keyword(s):  
Constructed Wetlands ◽  
Industrial Wastewater ◽  
Treatment Plant ◽  
Oxygen Demand ◽  
Pollutant Removal ◽  
Horizontal Flow ◽  
Vertical Flow ◽  
Treatment Efficiency ◽  
Reject Water ◽  
Pollutants Removal

Reject water is a by-product of every municipal and agro-industrial wastewater treatment plant (WWTP) applying sewage sludge stabilization. It is usually returned without pre-treatment to the biological part of WWTP, having a negative impact on the nitrogen removal process. The current models of pollutants removal in constructed wetlands concern municipal and industrial wastewater, whereas there is no such model for reject water. In the presented study, the results of treatment of reject water from dairy WWTP in subsurface vertical flow (SS VF) and subsurface horizontal flow (SS HF) beds were presented. During a one-year research period, SS VF bed reached 50.7% efficiency of TN removal and 73.8% of NH4+-N, while SS HF bed effectiveness was at 41.4% and 62.0%, respectively. In the case of BOD5 (biochemical oxygen demand), COD (chemical oxygen demand), NH4+-N, and TN (total nitrogen), the P-k-C* model was applied. Multi-model nonlinear segmented regression analysis was performed. Final mathematical models with estimates of parameters determining the treatment effectiveness were obtained. Treatment efficiency increased up to the specific temperature, then it was constant. The results obtained in this work suggest that it may be possible to describe pollutant removal behavior using simplified models. In the case of TP (total phosphorus) removal, distribution tests along with a t-test were performed. All models predict better treatment efficiency in SS VF bed, except for TP.

Sign in / Sign up

Export Citation Format

Share Document