Potential Use of Constructed Wetlands for Wastewater Treatment in Northern Environments

Jenssen, Petter D.; Mæhlum, Trond; Krogstad, Tore

doi:10.2166/wst.1993.0223

Cited by 138 publications

(60 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…As one of the main biological components of freshwater systems, aquatic plants or macrophytes not only assimilate pollutants directly into their tissues, but can also act as catalysts for purification reactions by increasing environmental diversity in the rhizosphere, thereby promoting various chemical and biochemical reactions that enhance purification [10]. These plants are also important since they are a source of oxygen, provide food, shade and cover for fish and other aquatic organisms.…”

Section: Introductionmentioning

confidence: 99%

Heavy Metal Accumulation Potential of Some Wetland Plants Growing Naturally in the City of Kolkata, India

Jha¹,

Samal²,

Santra³

et al. 2016

AJPS

View full text Add to dashboard Cite

Freshwaters are not only used locally in many developing countries but they are often over exploited for domestic purposes, agriculture and disposal of industrial wastes which result in an overload of excess nutrients, harmful chemicals and heavy metals. Plant species together with sediments and water samples collected from eleven aquatic water bodies in the vicinity of industrial units in Kolkata were studied for their potential to uptake Pb, Cd and Cr under field conditions. Cd and Cr concentrations in the sediments were higher than background values considered to be toxic.Alternanthera philoxeroides and Eichhornia crassipes were the two invasive species present, with the former being more widely distributed. Among native plants, Ipomoea aquatica was the most abundant. Metal uptake in the plants differed among species, tissues and sites. Pb and Cd accumulation in root tissues for all plants in most sites suggested an exclusion strategy for metal tolerance. Since I. aquatica is widely consumed in many parts of SE Asia, its metal content should be checked before use since it was found to efficiently translocate both Pb and Cd from roots to shoots.The potential of A. philoxeroides as a metal excluder needs to be explored further since it translocates less to its shoots as compared to E. crassipes and I. aquatica.

show abstract

Section: Introductionmentioning

confidence: 99%

Heavy Metal Accumulation Potential of Some Wetland Plants Growing Naturally in the City of Kolkata, India

Jha¹,

Samal²,

Santra³

et al. 2016

AJPS

View full text Add to dashboard Cite

show abstract

“…Brix (1990) found that the ability of macrophytes to provide oxygen was limiting nitrification in horizontal subsurface flow CWs. In Norway, where plants are dormant during the cold season this has been overcome by using an aerobic biofilter (pre-treatment filter) preceding the horizontal subsurface flow wetland filter (Jenssen et al, 1993). The use of LWA with well-defined properties has simplified design of these treatment systems (Maehlum and Jenssen, 2002;Jenssen and Krogstad, 2002).…”

Section: Introductionmentioning

confidence: 99%

Filter bed systems treating domestic wastewater in the Nordic countries – Performance and reuse of filter media

Jenssen

Krogstad

Paruch

et al. 2010

Ecological Engineering

View full text Add to dashboard Cite

a b s t r a c tNine filter beds have been constructed in the Nordic countries, Denmark, Finland, Norway and Sweden. Filter beds consist of a septic tank followed by an aerobic pre-treatment biofilter and a subsequent saturated flow grass-covered filter. Thus, filter beds are similar to subsurface flow constructed wetlands with pre-treatment biofilters, but do not have wetland plants with roots submerged into the saturated filter. All saturated filters contain Filtralite ® P, a light-weight expanded clay aggregate possessing high phosphorus sorption capacity. The filter bed systems showed stable and consistent performance during the testing period of 3 years. Removal of organic matter measured as biochemical oxygen demand (BOD) was >80%, total phosphorus (TP) >94% and total nitrogen (TN) ranged from 32 to 66%. Effluent concentrations of fecal indicator bacteria met the European bathing water quality criteria in all systems. One system was investigated for virus removal and somatic viruses were not detected in the effluent. The investigations revealed that the majority of the BOD and nitrogen removal occurred in the pre-treatment filters and the phosphorus and bacteria removal was more prominent in the saturated filters. The saturated filters could be built substantially smaller than the current design guidelines without sacrificing treatment performance. The used filter material met the Norwegian regulations for reuse in agriculture with respect to heavy metals, bacteria and parasites. When saturated with phosphorus, the light-weight aggregate, Filtralite ® P used in the saturated bed is a suitable phosphorus fertilizer and additionally has a liming effect.

show abstract

“…It was expected that the experimental pots containing coconut flake with and without planting Pudsaon used water through evapotranspiration process could make room temperature decreasing (Juwarkar et al, 1995;Hammer, 1989;Ahn & Mitsch, 2002;Jenssen et al, 1994;Keddy, 2010;Bowen, 1926;Lai et al, 2011;Dicken et al, 2013;Gates, 1980;Hartman, 1994;Holland et al, 2013;Coseo & Larsen, 2014).…”

Section: Useable Pudsaon For Sensible Heat Absorptionmentioning

confidence: 99%

Lag Time of Heat Conduction in Conditions of Growing Greenery Cover on Flattop-Concrete Roof of Single-Room House with Lightweight-Concrete Walls as Constructed on Narrow Space in Bangkok

Suwansumrit¹,

Chunkao²,

Bualert³

et al. 2015

MAS

View full text Add to dashboard Cite

Growing greenery cover on flattop-concrete roof of single-room house with lightweight-concrete walls for lagging heat conduction was experimented during 10 August-30 November 2014 at Kasetsart University on narrow space between the College of Environment and car park buildings which emphasized on minimum room size of 2.5 m width, 2.5 m length, and 2.5 m height as declared by Building Control Act 1990. The methods of study were conducted by installing air thermometers at distance from the house and one meter above ground in northerly, southerly, easterly, westerly and flattop-concrete roof by alternating closing and opening the door and window. The research results found the maximum room temperature ranging 34.5-35.5 o C and minimum 26.5-27.7 o C for closing door and closing window, then decreasing almost being equal from degree of opening door and window, and clearly changing in conditions of long duration, high intensity, and often frequency of rainfall. Using Pudsaon or Cape Jasmine (Gardenia jasminoides J.Ellis) as grown in experimental pots containing coconut flake due to its characteristics of more consuming phreatophyte with high rate of using water for evapotranspiration process that can absorb surrounding heat through converting process to become latent heat flux. In consequence, room temperature was lowered down to 24.5 o C and following by decreasing lag time from 2 hours to 0.5 hours, and also different lag time from 1-2 hours to 0.5-1.5 hours which were indicated better comfortable living. Closing both door and window or either one could not be conditioned for everyday lifestyle of people in dense and populated Bangkok city. In addition, construction of single-room house with flattop-concrete roof and lightweight-concrete walls were surely eligible to protect heat transferring from hot air outside into room rather than from room to outside, except opening both door and window at the same time

show abstract

Potential Use of Constructed Wetlands for Wastewater Treatment in Northern Environments

Cited by 138 publications

References 0 publications

Heavy Metal Accumulation Potential of Some Wetland Plants Growing Naturally in the City of Kolkata, India

Heavy Metal Accumulation Potential of Some Wetland Plants Growing Naturally in the City of Kolkata, India

Filter bed systems treating domestic wastewater in the Nordic countries – Performance and reuse of filter media

Lag Time of Heat Conduction in Conditions of Growing Greenery Cover on Flattop-Concrete Roof of Single-Room House with Lightweight-Concrete Walls as Constructed on Narrow Space in Bangkok

Contact Info

Product

Resources

About