Clogging in subsurface-flow treatment wetlands: Occurrence and contributing factors

Ecological Engineering

Volumn 37, Issue 2, 2011, Pages 99-112

  Knowles, Paul ^a   Dotro, Gabriela ^b   Nivala, Jaime ^c,d   García, Joan ^e  

^a ASTON UNIVERSITY   (United Kingdom)

^b CRANFIELD UNIVERSITY   (United Kingdom)

^c AARHUS UNIVERSITY   (Denmark)

^d HELMHOLTZ CENTRE FOR ENVIRONMENTAL RESEARCH UFZ   (Germany)

^e UNIVERSITAT POLITÈCNICA DE CATALUNYA   (Spain)

Author keywords

Clog matter; Constructed wetland; Design; Horizontal flow; Loading rates; Review; Vertical flow

Indexed keywords

CLOG MATTER; CONSTRUCTED WETLANDS; HORIZONTAL FLOWS; LOADING RATES; VERTICAL FLOWS;

DESIGN; HYDRAULICS; LOADING; MAINTENANCE; ROADS AND STREETS; WASTEWATER; WETLANDS;

WASTEWATER TREATMENT;

FLOW REGULATION; HYDRAULICS; SUBSURFACE FLOW; WASTE TREATMENT; WASTEWATER; WETLAND;

EID: 78751704191     PISSN: 09258574     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.ecoleng.2010.08.005     Document Type: Review

References (142)

1. Álvarez J.A., Ruíz I., Soto M. Anaerobic digesters as a pretreatment for constructed wetlands. Ecol. Eng. 2008, 33(1):54-67.
2. Asaeda T., Nam L.H., Heietz P., Tanaka N., Karunatatne S. Seasonal fluctuations in live and dead biomass of Phragmites australis as described by a growth and decomposition model: implications of duration of aerobic conditions for litter mineralization and sedimentation. Aquat. Bot. 2002, 73(3):223-239.
3. Austin, D.C., 2005. Patent: Tidal vertical flow wastewater treatment system and method. United States: US 6,896,805 B2.
4. Baird A.J., Surridge B.W., Money R.P. An assessment of the piezometer method for measuring the hydraulic conductivity of a Cladium mariscus-Phragmites australis root mat in a Norfolk (UK) fen. Hydrol. Process. 2004, 18:275-291.
5. Barros P., Ruiz I., Soto M. Performance of an anaerobic digester-constructed wetland system for a small community. Ecol. Eng. 2008, 33(2):142-149.
6. Batchelor A., Loots P. A critical evaluation of a pilot scale subsurface flow wetland: ten years after commissioning. Water Sci. Technol. 1997, 35(5):337-343.
7. Baveye P., Vandevivere P., Hoyle B.L., DeLeo P.C., de Lozada D.S. Environmental impact and mechanisms of the biological clogging of saturated soils and aquifer materials. Crit. Rev. Environ. Sci. Tech. 1998, 28(2):123-191.
8. Bavor H.J., Schulz T.J. Sustainable suspended solids and nutrient removal in large-scale, solid-matrix, constructed wetland systems. Constructed Wetlands for Water Quality Improvement 1993, 646-656. Lewis Publishers, Boca Raton, FL. G.A. Moshiri (Ed.).
9. Behrends L.L., Houke L., Bailey E., Jansen P., Brown D. Reciprocating constructed wetlands for treating industrial, municipal, and agricultural wastewater. Water Sci. Technol. 2001, 44(11-12):399-405.
10. Blazejewski R., Murat-Blazejewska S. Soil clogging phenomena in constructed wetlands with subsurface flow. Water Sci. Technol. 1997, 35(5):183-188.
11. Boutin C., Liénard A., Esser D. Development of a new generation of reedbed filters in France: first results. Water Sci. Technol. 1997, 35(5):315-322.
12. Bowmer K.H. Nutrient removal from effluents by artificial wetland: influence of rhizosphere aeration and preferential flow studied using bromide and dye tracers. Water Res. 1987, 21(5):591-599.
13. Breen P.F., Chick A.J. Root zone dynamics in constructed wetlands receiving wastewater a comparison of vertical and horizontal flow systems. Water Sci. Technol. 1995, 32(3):281-290.
14. Brix H. Functions of macrophytes in constructed wetlands. Water Sci. Technol. 1994, 29(4):71-78.
15. Brix H. Use of constructed wetlands in water pollution control: historical development, present status, and future perspectives. Water Sci. Technol. 1994, 30(8):209-223.
16. Brix H., Arias C.A. Danish guidelines for small-scale constructed wetland system for onsite treatment of domestic sewage. Water Sci. Technol. 2005, 51(9):1-9.
17. Brix, H., Johansen, N.H., 2004. Danish guidelines for vertical flow wetland systems (in Danish: Retningslinier for etablering af beplantede filteranlæg op til 30 PE). Århus, Denmark.
18. Brix H., Schierup H. Sewage treatment in constructed reed beds: Danish experiences. Water Sci. Technol. 1989, 21:1665-1668.
19. Campbell C.S., Ogden M.H. Constructed Wetlands in the Sustainable Landscape 1999, John Wiley & Sons, New York, New York.
20. Caselles-Osorio A., García J. Performance of experimental horizontal subsurface flow constructed wetlands fed with dissolved or particulate organic matter. Water Res. 2006, 40(19):3603-3611.
21. Caselles-Osorio A., García J. Effect of physico-chemical pretreatment on the removal efficiency of horizontal subsurface-flow constructed wetlands. Environ. Pollut. 2007, 146:55-63.
22. Caselles-Osorio A., Puigagut J., Segu E., Vaello N., Granes F., García D., García J. Solid accumulation in six full-scale subsurface flow constructed wetlands. Water Res. 2007, 41(6):1388-1389.
23. Chazarenc F., Maltais-Landry G., Troesch S., Comeau Y., Brisson J. Effect of loading rate on performance of constructed wetlands treating an anaerobic supernatant. Water Sci. Technol. 2007, 56(3):23-29.
24. Chazarenc F., Merlin G. Influence of surface layer on hydrology and biology of gravel bed vertical flow constructed wetlands. Water Sci. Technol. 2005, 51(9):91-97.
25. Chimney M.J., Pietro K.C. Decomposition of macrophyte litter in a subtropical constructed wetland in south Florida (USA). Ecol. Eng. 2006, 27(4):301-321.
26. Christensen J.B., Jensen D.L., Grøn C., Filip Z., Christensen T.H. Characterization of the dissolved organic carbon in landfill leachate-polluted groundwater. Water Res. 1998, 32(1):125-135.
27. Conley L.M., Dick R.I., Lion L.W. An assessment of the root zone method of wastewater treatment. J. Water Pollut. Control Fed. 1991, 63(3):239-247.
28. Coombes C. Reed bed treatment systems in Anglian water. Constructed Wetlands in Water Pollution Control 1990, 223-234. Pergamon Press, Oxford, United Kingdom. P.F. Cooper, B.C. Findlater (Eds.).
29. Cooper D. The Constructed Wetland Association UK database of constructed wetland systems. Water Sci. Technol. 2007, 56(3):1-6.
30. Cooper D., Griffin P., Cooper P.F. Factors affecting the longevity of sub-surface horizontal flow systems operating as tertiary treatment for sewage effluent. Wastewater Treatment, Plant Dynamics and Management in Constructed and Natural Wetlands 2008, 191-198. Backhuys Publishers, Leiden, The Netherlands. J. Vymazal (Ed.).
31. Cooper D.J., Griffin P., Cooper P.F. Factors affecting the longevity of sub-surface horizontal flow systems operating as tertiary treatment for sewage effluent. Water Sci. Technol. 2005, 51(9):127-135.
32. Cooper P.F. The performance of vertical-flow constructed wetland systems with special reference to the significance of oxygen transfer and hydraulic loading rate. Water Sci. Technol. 2005, 51(9):81-90.
33. Cooper P.F., Cooper D. Evaluation of a tidal flow reed bed system for the treatment of domestic sewage: nitrification trials. Natural and Constructed Wetlands: Nutrients, Metals and Management 2005, 222-232. Backhuys Publishers, Leiden, The Netherlands. J. Vymazal (Ed.).
34. Cooper P.F., Green B. Reed bed treatment systems for sewage treatment in the United Kingdom: the first 10 years experience. Water Sci. Technol. 1995, 32(3):317-322.
35. Cooper P.F., Job J.D., Green B., Shutes R.B.E. Reed Beds and Constructed Wetlands for Wastewater Treatment 1996, WRc Publications, Swindon, United Kingdom, 184 p. plus data diskette.
36. Corzo, A., Pedescoll, A., Álvarez, E., García, J., 2008. Solids accumulation and drainable porosity in experimental subsurface flow constructed wetlands with different primary treatments and operating strategies. In: Billore, S.K., Dass, P., Vymazal, J. (Eds.), Proceedings of the 11th International Conference on Wetland Systems for Water Pollution Control, 1-7 November 2008. Vikram University and IWA, Indore, India, pp. 290-295.
37. Crites R., Tchobanoglous G. Small and Decentralized Wastewater Management Systems 1998, McGraw-Hill, New York, New York.
38. CWA Database, 2006. Constructed Wetlands Interactive Database. Compiled by G.D. Job and P.F. Cooper. Version 9.02.
39. deBeer D., Stoodley P. Relation between the structure of an aerobic biofilm and transport phenomena. Water Sci. Technol. 1995, 32(8):11-18.
40. Dornelas, F.L., Machado, M.B., von Sperling, M., 2008. Performance evaluation of planted and unplanted subsurface-flow constructed wetlands for the post-treatment of UASB reactor effluents. In: Billore, S.K., Dass, P., Vymazal, J. (Eds.), Proceedings of the 11th International Conference on Wetland Systems for Water Pollution Control, 1-7 November 2008. Vikram University and IWA, Indore, India, pp. 400-407.
41. Dotro G., Larsen D., Palazolo P. Preliminary evaluation of biological and physical-chemical chromium removal mechanisms in gravel media used in constructed wetlands. Water Air Soil Pollut. 2010, doi 10.1007/s11270-010-0495-9.
42. Drury W.J., Mainzhausen K. Hydraulic characteristics of subsurface flow wetlands. Proceedings of the 2000 Billings Land Reclamation Symposium 2000.
43. Dupin H.J., Kitanidis P.K., McCarty P.L. Simulations of two-dimensional modeling of biomass aggregate growth in network models. Water Resour. Res. 2001, 37(12):2981-2994.
44. Dupin H.J., McCarty P.L. Mesoscale and microscale observations of biological growth in a silicon pore imaging element. Environ. Sci. Technol. 1999, 33(8):1230-1236.
45. EC/EWPCA Emergent Hydrophyte Treatment Systems Expert Contact Group, Water Res Centre, 1990. In: P.F. C. (Ed.), European Design and Operations Guidelines for Reed Bed Treatment Systems. WRc, Swindon, United Kindgom.
46. Fisher P.J. Hydraulic characteristics of constructed wetlands at Richmond, New South Wales, Australia. Constructed Wetlands in Water Pollution Control 1990, 21-32. Pergamon Press, Oxford, United Kingdom. P.F. Cooper, B.C. Findlater (Eds.).
47. Fleming I.R., Rowe R.K., Cullimore D.R. Field observations of clogging in a landfill leachate collection system. Can. Geotech. J. 1999, 36(4):685-707.
48. García J., Caselles-Osorio A., Story A., DePauw N., Vanrolleghem P.A. Impact of prior physico-chemical treatment on the clogging process of subsurface-flow constructed wetlands: model-based evaluation. Water Air Soil Pollut. 2007, 185:101-109.
49. García, J., Corzo, A., 2008. Depuración con Humedales Construidos: Guía Práctica de Diseño, Construcción y Explotaciód de Sistemas de Humedales de Flujo Subsuperficial. Universitat Politècnica de Catalunya, Barcelona, Spain.
50. García J., Ojeda E., Sales E., Chico F., Píriz T., Aguirre P., Mujeriego R. Spatial variations of temperature, redox potential, and contaminants in horizontal flow reed beds. Ecol. Eng. 2003, 21(2-3):129-142.
51. Gersberg R.M., Elkins B.V., Goldman C.R. Use of artificial wetlands to remove nitrogen from wastewater. J. Water Pollut. Control Fed. 1984, 56:152-156.
52. GFA (Gesellschaft zur Förderung der Abwassertechnik e.V.), 1998. Design Manual ATV-A 262: Principles of Dimensioning, Construction and Operation of Constructed Wetlands for Community Wastewater up to 1000 Person Equivalents (In German: Arbeitsblatt ATV-A 262: Grundsätze für Bemessung, Bau und Betrieb von Planzenbeetwn für kommunales Abwasser bei Ausbaugrößen bis 1000 Einwohnerwerte). St. Augustin, Germany.
53. Green M., Shaul N., Beliavski M., Sabbah I., Ghattas B., Tarre S. Minimizing land requirement and evaporation in small wastewater treatment systems. Ecol. Eng. 2006, 26(3):266-271.
54. Green M.B., Upton J. Constructed reed beds: appropriate technology for small communities. Water Sci. Technol. 1995, 32(3):339-348.
55. Griffin P., Pamplin C. The advantages of a constructed reed bed based strategy for small sewage treatment works. Water Sci. Technol. 1998, 38(3):143-150.
56. Griffin, P., Wilson, L., Cooper, D., 2008. Changes in the use, operation and design of sub-surface flow constructed wetlands in a major UK water utility. In: Billore, S.K., Dass, P., Vymazal, J. (Eds.), Proceedings of the 11th International Conference on Wetland Systems for Water Pollution Control, 1-7 November 2008. Vikram University and IWA, Indore, India, pp. 419-426.
57. Haberl R., Perfler J. Seven years of research work and experience with wastewater treatment by a reed bed system. Constructed Wetlands in Water Pollution Control 1990, 205-214. Pergamon Press, Oxford, United Kingdom. P.F. Cooper, B.C. Findlater (Eds.).
58. Hermansson M. The DLVO theory in microbial adhesion. Biointerfaces 1999, 14(1-4):105-119.
59. Hubbe M.A., Chen H., Heitmann J.A. Permeability reduction phenomena in packed beds, fiber mats, and wet webs of paper exposed to flow of liquids and suspensions: a review. BioResources 2009, 4(1):405-451.
60. Hyánková, E., Kriška-Dunajský, M., Rozkošný, M., Sálek, J., 2006. The knowledge based on the research of the filtration properties of the filter media and on the determination of clogging causes. In: Proceedings of the 10th International Conference on Wetland Systems for Water Pollution Control, 23-29 September 2006. Ministério de Ambiente, do Ordenamento do Territóri e do Desenvolvimento Regional (MAOTDR) and IWA, Lisbon, Portugal, pp. 1331-1338.
61. IWA Specialist Group on Use of Macrophytes in Water Pollution Control, 2000. Constructed Wetlands for Pollution Control: Processes, Performance, Design and Operation. London, United Kingdom: IWA Publishing.
62. Iwema, A., Raby, D., Lesarve, J., Boutin, C., Dodane, P.-H., Liénard, A., Molle, P., Beck, C., Sadowski, G.A., Merlin, G., Dap, S., Ohresser, C., Poulet, J.-B., Reeb, G., Werckmann, M., Esser, D., 2005. Treatment of domestic waste water plant with filters macrophytes: technical recommendations for the design and realization. (In French: Épuration des eau usees domestiques par filtres plantes de macrophytes: Recommandations techniques pour la conception et la realisation). Agences de l'Eau Rhône, Méditerranée et Course, et Rhin Meuse, France.
63. Kadlec R.H., Knight R.L. Treatment Wetlands 1996, CRC Press, Boca Raton, FL. first ed.
64. Kadlec R.H., Wallace S.D. Treatment Wetlands 2009, CRC Press, Boca Raton, FL. second ed.
65. Kadlec R.H., Watson J.T. Hydraulics and solids accumulation in a gravel bed treatment wetland. Constructed Wetlands for Water Quality Improvement 1993, 227-235. Lewis Publishers, Boca Raton, FL. G.A. Moshiri (Ed.).
66. Kayser K., Kunst S. Processes in vertical-flow reed beds: nitrification, oxygen transfer, and soil clogging. Water Sci. Technol. 2005, 51(9):177-184.
67. Khatiwada N.R., Polprasert C. Assessment of effective specific surface area for free water surface constructed wetlands. Water Sci. Technol. 1999, 40(3):83-89.
68. Kickuth, R.W., Könemann, N., 1988. Patent: Method for the purification of sewage waters. United States: US 4,793,929.
69. King A.C., Mitchell C.A., Howes T. Hydraulic tracer studies in a pilot scale subsurface flow constructed wetland. Water Sci. Technol. 1997, 35(5):189-196.
70. Kirschner A., Riegl B., Velimirov B. Degradation of emergent and submerged macrophytes in an oxbow lake of an embanked backwater system: implications for the terrestrialization process. Int. Rev. Hydrobiol. 2001, 86(4-5):555-571.
71. Knowles P.R., Davies P.A. A method for the in-situ determination of the hydraulic conductivity of gravels as used in constructed wetlands for wastewater treatment. Desalination Water Treat. 2009, 1(5):257-266.
72. Knowles P.R., Griffin P., Davies P.A. Complementary methods to investigate the development of clogging within a horizontal subsurface flow tertiary treatment wetland. Water Res. 2010, 44(1):320-330.
73. Lahav O., Artzi E., Tarre S., Green M. Ammonium removal using a novel unsaturated flow biological filter with passive aeration. Water Res. 2001, 35(2):397-404.
74. Langergraber G. Modeling of processes in subsurface flow constructed wetlands: a review. Vadose Zone J. 2008, 7(2):830-842.
75. Langergraber G., Haberl R., Laber J., Pressl A. Evaluation of substrate clogging processes in vertical flow constructed wetlands. Water Sci. Technol. 2003, 48(5):25-34.
76. Levine A.D., Tchobanoglous G., Asano T. Size distributions of particulate contaminants in wastewater and their impact on treatability. Water Res. 1991, 25(8):911-922.
77. Liénard A., Boutin C., Esser D. Domestic wastewater treatment with emergent hydrophyte beds in France. Constructed Wetlands in Water Pollution Control 1990, 183-192. Pergamon Press, Oxford, United Kingdom. P.F. Cooper, B.C. Findlater (Eds.).
78. Llorens E., Puigagut J., García J. Distribution and biodegradability of sludge accumulated in a full-scale horizontal subsurface-flow constructed wetland. Desal. Water Treat. 2009, 4:54-58.
79. Logan B.E., Jewett D.G., Arnold R.G., Bouwer E.J., O'Melia C.R. Clarification of clean-bed filtration models. J. Environ. Eng. 1995, 121(12):837-869.
80. Madigan M.T., Martinko J.M., Brock T.D. Brock Biology of Microogranisms 2006, Pearson Prentice Hall, Upper Saddle River, New Jersey. 11th ed.
81. Maloszewski P., Wachniew P., Czuprynski P. Study of hydraulic parameters in heterogeneous gravel beds: constructed wetland in Nowa Slupia (Poland). J. Hydrol. 2006, 331(3-4):630-642.
82. Mays D.C., Hunt R.J. Hydrodynamic aspects of particle clogging in porous media. Environ. Sci. Technol. 2005, 39(2):577-584.
83. Molle P., Liénard A., Boutin C., Merlin G., Iwema A. How to treat raw sewage with constructed wetlands: an overview of the French systems. Water Sci. Technol. 2005, 51(9):11-21.
84. Molle P., Liénard A., Grasmick A., Iwema A. Effect of reeds and feeding operations on hydraulic behaviour of vertical flow constructed wetlands under hydraulic overloads. Water Res. 2006, 40(3):606-612.
85. Muñoz P., Drizo A., Hession W.C. Flow patterns of dairy wastewater constructed wetlands in a cold climate. Water Res. 2006, 40(17):3209-3218.
86. Murphy, C., Cooper, D., 2010. The evolution of horizontal sub-surface flow reed bed design for teritary treatment of sewage effluents in the UK. In: Vymazal, J. (Ed.), Water and Nutrient Management in Natural and Constructed Wetlands. Springer, Dordrecht, Netherlands.
87. Netter R., Bischofsberger W. Hydraulic investigations on planted soil filters. Constructed Wetlands in Water Pollution Control 1990, 11-20. Pergamon Press, Oxford, United Kingdom. P.F. Cooper, B.C. Findlater (Eds.).
88. Nguyen L. Accumulation of organic matter fractions in a grave-bed constructed wetland. Water Sci. Technol. 2001, 44(11-12):281-287.
89. Nguyen L.M. Organic matter composition, microbial biomass and microbial activity in gravel-bed constructed wetlands treating farm dairy wastewaters. Ecol. Eng. 2000, 16(2):199-221.
90. Nivala J.A., Hoos M.B., Cross C.S., Wallace S.D., Parkin G.F. Treatment of landfill leachate using an aerated, horizontal subsurface-flow constructed wetland. Sci. Total Environ. 2007, 380:19-27.
91. Nivala J.A., Rousseau D.P.L. Reversing clogging in subsurface-flow constructed wetlands by hydrogen peroxide treatment: two case studies. Water Sci. Technol. 2009, 59(10):2037-2046.
92. ÖNORM B 2505, 2005. Subsurface flow constructed wetlands - Application, dimensioning, installation, and operation (Update to 1997 publication) (In German: Bepflanzte Bodenfilter (Pflanzenkläranlagen) -Anwendung, Bemessung, Bau und Betrieb). Österreichisches Normungsinstitut: Vienna, Austria.
93. Parr T.W. Factors affecting reed (Phragmites australis) growth in UK reed bed treatment systems. Constructed Wetlands in Water Pollution Control 1990, 67-76. Pergamon Press, Oxford, United Kingdom. P.F. Cooper, B.C. Findlater (Eds.).
94. Pauly U. Performance data of a wastewater and sludge treatment plant derived from the Root Zone Method set against the background of detention times. Constructed Wetlands in Water Pollution Control 1990, 289-300. Pergamon Press, Oxford, United Kingdom. P.F. Cooper, B.C. Findlater (Eds.).
95. Pedescoll A., Uggetti E., Llorens E., Granés F., García D., García J. Practical method based on hydraulic conductivity used to assess clogging in subsruface flow constructed wetlands. Ecol. Eng. 2009, 35(8):1216-1224.
96. Platzer C., Mauch K. Soil clogging in vertical flow reed beds: mechanisms, parameters, consequences and... solutions?. Water Sci. Technol. 1997, 35(5):175-182.
97. Puigagut J., Caselles-Osorio A., Vaello N., García J. Fractionation, Biodegradability, and Particle-size Distribution of Organic Matter in Horizontal Subsurface-flow Constructed Wetlands 2008, 289-297. Springer, Dordrecht, Netherlands. J. Vymazal (Ed.).
98. Ragusa S.R., McNevin D., Qasem S., Mitchell C. Indicators of biofilm development and activity in constructed wetlands microcosms. Water Res. 2004, 38:2865-2873.
99. Reed S.C., Crites R., Middlebrooks E.J. Natural Systems for Waste Management and Treatment 1995, McGraw-Hill, New York.
100. Rittman B.E., McCarty P.L. Evaluation of steady-state biofilm kinetics. Biotechnol. Bioeng. 1980, 22(11):2359-2373.
101. Rousseau D.P.L., Horton D., Vanrolleghem P.A., De Pauw N. Impact of operational maintenance on the asset life of storm reed beds. Water Sci. Technol. 2005, 51(9):243-250.
102. Rybczyk J.M., Day J.W., Conner W.H. The impact of wastewater effluent on accretion and decomposition in a subsiding forested wetland. Wetlands 2002, 22(1):18-32.
103. Sanford W.E., Steenhuis T.S., Parlange J.Y., Surface J.M., Peverly J.H. Hydraulic conductivity of gravel and sand as substrates in rock-reed filters. Ecol. Eng. 1995, 4(4):321-326.
104. Seidel, K., 1973. Patent: System for purification of polluted water. United States: US 3,770,623.
105. Sheoran A., Sheoran V. Heavy metal removal mechanism of acid mine drainage in wetlands: a critical review. Miner. Eng. 2006, 19:105-116.
106. Spangler, F.L., Sloey, W.E., Fetter, C.W.J., 1976. Wastewater Treatment by Natural and Artificial Marshes. US EPA Office of Water, Ada, Oklahoma.
107. Steiner G.R., Freeman R.J.J. Configuration and Substrate Design Considerations for Constructed Wetlands for Wastewater Treatment 1989, 363-377. Lewis Publishers, Chelsea, MI. D.A. Hammer (Ed.).
108. Suliman F., French H.K., Haugen L.E., Søvik A.K. Change in flow and transport patterns in horizontal subsurface flow constructed wetlands as a result of biological growth. Ecol. Eng. 2006, 27(2):124-133.
109. Sun G., Zhao Y., Allen S. An alternative arrangement of gravel media in tidal flow reed beds treating pig farm wastewater. Water Air Soil Pollut. 2007, 182(1):13-19.
110. Swift D.L., Friedlander S.K. The coagulation of hydrosols by Brownian motion and laminar sheer flow. J. Coll. Sci. Imp. U. Tok. 1964, 19(7):621-647.
111. Tanner C.C. Growth and nutrition of Schoenoplectus validus in agricultural wastewaters. Aquat. Bot. 1994, 47(2):131-153.
112. Tanner C.C., Sukias J.P. Accumulation of organic solids in gravel bed constructed wetlands. Water Sci. Technol. 1995, 32(3):229-239.
113. Tanner C.C., Sukias J.P.S., Upsdell M.P. Organic matter accumulation and maturation of gravel bed constructed wetlands treating dairy farm wastewaters. Water Res. 1998, 32(10):3046-3054.
114. Taylor S.W., Milly P.C.D., Jaffe P.R. Biofilm growth and the related changes in the physical properties of a porous medium: 2. Permeability. Water Resour. Res. 1990, 26(9):2161-2169.
115. Tchobanoglous G. Constructed wetlands and aquatic plant systems: research, design, operational and montioring issues. Constructed Wetlands for Water Quality Improvement 1993, 23-34. Lewis Publishers, Boca Raton, FL. G.A. Moshiri (Ed.).
116. Tchobanoglous, G., 2003. Preliminary treatment in constructed wetlands. In: Proceedings of the 1st International Seminar on the Use of Aquatic Macrophytes for Wastewater Treatment in Constructed Wetlands, 8-10 May 2003. Instituto da Conservacao da Natureza and Instituto da Agua: Lisbon, Portugal, pp. 13-33.
117. Thullner M. Comparison of bioclogging effects in saturated porous meda within one- and two-dimensional flow systems. Ecol. Eng. 2010, 36(2):176-196.
118. Tietz A., Kirschner A., Langergraber G., Sleytr K., Haberl R. Characterisation of microbial biocenosis in vertical subsurface flow constructed wetlands. Sci. Total Environ. 2007, 380:163-172.
119. Tufenkji N. Modelling microbial transport in porous media: traditional approaches and recent developments. Adv. Water Resour. 2007, 30(6-7):1455-1469.
120. TVA, 1993. General design, construction, and operation guidelines: constructed wetlands wastewater treatment systems for small users including individual residences, 2nd ed. In: Steiner, G.R., Watson, J.T. (Eds.), Tennessee Valley Authority (TVA) Resource Group Water Management: Chattanooga, Tennessee.
121. US EPA, 1988. Design Manual: Constructed Wetlands and Aquatic Plant Systems For Municipal Wastewater Treatment. US EPA Office of Water, Cincinnati, Ohio.
122. US EPA, 1993. Subsurface Flow Constructed Wetlands For Wastewater Treatment: A Technology Assessment. US EPA Office of Water.
123. US EPA, 2000. Constructed Wetlands Treatment of Municipal Wastewaters. US EPA Office of Research and Development, Washington, DC.
124. US EPA, 2002. Onsite Wastewater Treatment Systems Manual. US EPA Office of Research and Development, Washington, DC.
125. Vandevivere P., Baveye P. Effect of bacterial extracellular polymers on the saturated hydraulic conductivity of sand columns. Appl. Environ. Microb. 1992, 58(5):1690-1698.
126. Vandevivere P., Baveye P. Relationship between transport of bacteria and their clogging efficiency in sand columns. Appl. Environ. Microb. 1992, 58(8):2523-2530.
127. Vandevivere P., Baveye P. Saturated hydraulic conductivity reduction caused by aerobic bacteria in sand columns. Soil Sci. Soc. Am. J. 1992, 56(1):1-13.
128. Vymazal J. The use of subsurface flow constructed wetlands for wastewater treatment in the Czech Republic. Ecol. Eng. 1996, 7:1-14.
129. Vymazal J., Brix H., Cooper P.F., Green M.B., Haberl R. Constructed Wetlands for Wastewater Treatment in Europe 1998, Backhuys Publishers, Leiden, The Netherlands.
130. Vymazal J., Kröpfelová L. Wastewater Treatment in Constructed Wetlands with Horizontal Sub-Surface Flow 2008, Springer.
131. Wallace, S.D., Knight, R.L., 2006. Small-scale constructed wetland treatment systems: feasibility, design criteria, and O&M requirements. Water Environment Research Foundation (WERF), Alexandria, Virginia.
132. Waters, M., Pilgrim, D.H., Schulz, T.J., Pilgrim, I.D., 1993. Variability of hydraulic response of constructed wetlands. In: Proceedings of the National Conference on Hydraulic Engineering, 25-30 July 1993 (San Francisco, California). American Society of Civil Engineers (ASCE), pp. 406-411.
133. Watson J.T., Choate K.D., Steiner G.R. Performance of constructed wetland treatment systems at Benton, Hardin, and Pembroke, Kentucky, during the early vegetation establishment phase. Constructed Wetlands in Water Pollution Control 1990, 171-182. Pergamon Press, Oxford, United Kingdom. P.F. Cooper, B.C. Findlater (Eds.).
134. Watson J.T., Hobson J.A. Hydraulic Design Considerations and Control Structure For Constructed Wetlands For Wastewater Treatment 1989, 379-391. Lewis Publishers, Chelsea, Michigan. D.A. Hammer (Ed.).
135. WERF Database, 2006. Small-Scale Constructed Wetland Treatment Systems Database (Project 01-CTS-5; Final Report by S.D. Wallace and R.L. Knight, 2006). Compiled by J.A. Nivala and R.A. Clarke.
136. Winter K.-J., Goetz D. The impact of sewage composition on the soil clogging phenomena of vertical flow constructed wetlands. Water Sci. Technol. 2003, 48(5):9-14.
137. Yao K.-M., Habibian M.T., O'Melia C.R. Water and waste water filtration: concepts and applications. Environ. Sci. Technol. 1971, 5(11):1105-1112.
138. Zachritz W.H.I., Fuller J.W. Performance of An Artificial Wetlands Filter Treating Facultative Lagoon Effluent at Carville, vol. 65, no. 1 1993, Water Environment Research, Louisiana, pp. 46-52.
139. Zamani A., Maini B. Flow of dispersed particles through porous media: deep bed filtration. J Petrol. Sci. Eng. 2009, 69(1-2):71-88.
140. Zhao Y.Q., Sun G., Allen S.J. Anti-sized reed bed system for animal wastewater treatment: a comparative study. Water Res. 2004, 38:2907-2917.
141. Zhu T., Jenssen P.D., Mæhlum T., Krogstad T. Phosphorus sorption and chemical characteristics of lightweight aggregates (LWA)-potential filter media in treatment wetlands. Water Sci. Technol. 1997, 35(5):103-108.
142. Zoeller, K.E., Byers, M.E., 1999. Patent: Wastewater treatment system. United States: US 5,897,777.