Performance of integrated household constructed wetland for domestic wastewater treatment in rural areas

Abstract As environmental legislation has become stricter in recent years, the issue of wastewater treatment in rural areas has become an increasing concern. Choice of the most suitable on-site purification systems is based on the key issues of affordability and appropriateness in Chinese rural areas. This paper describes an integrated household constructed wetland (IHCW) system planted with willow (Salix babylonica) to treat household domestic wastewater in rural villages in northern China. The precast frame structure of IHCW is strong and waterproof. It can be mass-produced and installed per a standard set of specifications. The IHCW has achieved high overall removal efficiencies for BOD5, TSS, NH4-N, and TP: 96.0%, 97.0%, 88.4% and 87.8%, respectively. A 0.4 m biomass layer cover on the system provided significant system thermal insulation, maintaining high treatment performance in freezing winter conditions. The system is cost effective and does not need any operational energy inputs, demonstrating its feasibility for single-family use in developing countries.

[1]  Manuel Soto,et al.  Performance of an anaerobic digester-constructed wetland system for a small community , 2008 .

[2]  Guoqian Chen,et al.  A vertical subsurface-flow constructed wetland in Beijing , 2008 .

[3]  Hansruedi Siegrist,et al.  Biological nutrient removal in a small-scale MBR treating household wastewater. , 2008, Water research.

[4]  G. Parkin,et al.  Cold climate wetlands: design and performance. , 2001, Water science and technology : a journal of the International Association on Water Pollution Research.

[5]  J. Vymazal.  Removal of nutrients in various types of constructed wetlands. , 2007, The Science of the total environment.

[6]  K. Hasselgren.  Use of municipal waste products in energy forestry: highlights from 15 years of experience. , 1998 .

[7]  R. Haberl,et al.  Constructed wetlands in Europe , 1995 .

[8]  A. E. Greenberg,et al.  Standard methods for the examination of water and wastewater : supplement to the sixteenth edition , 1988 .

[9]  P. Juhász,et al.  Application of constructed wetlands for wastewater treatment in Hungary , 1997 .

[10]  Hans Brix,et al.  Use of constructed wetlands in water pollution control: historical development, present status, and future perspectives , 1994 .

[11]  F. Stange,et al.  New Aspects of Microbial Nitrogen Transformations in the Context of Wastewater Treatment – A Review , 2007 .

[12]  Y Q Zhao,et al.  Characterization of aluminium-based water treatment residual for potential phosphorus removal in engineered wetlands. , 2009, Environmental pollution.

[13]  S. Prasher,et al.  Phosphorus reduction from agricultural runoff in a pilot-scale surface-flow constructed wetland , 2009 .

[14]  Yaqian Zhao,et al.  A novel alum-sludge based Constructed Wetland system to reduce pollution effects of agricultural run-off: first results , 2007 .

[15]  H. Brix.  Do macrophytes play a role in constructed treatment wetlands , 1997 .

[16]  A. C. Di Pinto,et al.  Effects of dissolved oxygen and diffusion resistances on nitrification kinetics , 1992 .

[17]  Ana Deletic,et al.  Techniques for water and wastewater management: a review of techniques and their integration in planning , 2000 .

[18]  May A. Massoud,et al.  Decentralized approaches to wastewater treatment and management: applicability in developing countries. , 2009, Journal of environmental management.

[19]  Tsuyoshi Ichinari,et al.  Wastewater treatment performance and sludge reduction properties of a household wastewater treatment system combined with an aerobic sludge digestion unit , 2008 .

[20]  Yaqian Zhao,et al.  Forms, patterns and extractability of phosphorus retained in alum sludge used as substrate in laboratory-scale constructed wetland systems , 2009 .

[21]  J. A. Álvarez,et al.  Anaerobic digesters as a pretreatment for constructed wetlands , 2008 .

[22]  Hans Brix,et al.  The use of vertical flow constructed wetlands for on-site treatment of domestic wastewater: New Danish guidelines , 2005 .

[23]  Florent Chazarenc,et al.  Microbial processes influencing performance of treatment wetlands: A review , 2009 .

[24]  Petr Grau.  Low cost wastewater treatment , 1996 .

[25]  A. D. La Rosa,et al.  Design of a constructed wetland for wastewater treatment in a Sicilian town and environmental evaluation using the emergy analysis , 2006 .

[26]  In S. Kim,et al.  Novel membrane bioreactor (MBR) coupled with a nonwoven fabric filter for household wastewater treatment. , 2010, Water research.

[27]  Ralf Otterpohl,et al.  Anaerobic biodegradability and treatment of grey water in upflow anaerobic sludge blanket (UASB) reactor. , 2007, Water research.

[28]  B. Davis,et al.  Damköhler number design method to avoid clogging of subsurface flow constructed wetlands by heterotrophic biofilms. , 2007, Water science and technology : a journal of the International Association on Water Pollution Research.

[29]  George Tchobanoglous,et al.  Wastewater Engineering Treatment Disposal Reuse , 1972 .

[30]  Rafael Mujeriego,et al.  Wastewater treatment for small communities in Catalonia (Mediterranean region) , 2001 .

[31]  J. Nakajima,et al.  Performance evaluation of on-site treatment facilities for wastewater from Households, Hotels and Restaurants , 1999 .

[32]  M. Bruen,et al.  Effectiveness of a drinking-water treatment sludge in removing different phosphorus species from aqueous solution , 2007 .

[33]  A. Werker,et al.  Treatment variability for wetland wastewater treatment design in cold climates , 2002 .

[34]  W. S. Warner,et al.  Cold-climate constructed wetlands , 1995 .

[35]  A. Goonetilleke,et al.  Integrated Risk Framework for Onsite Wastewater Treatment Systems , 2006, Environmental management.

[36]  Margaret Greenway,et al.  Constructed wetlands in Queensland: Performance efficiency and nutrient bioaccumulation , 1999 .

[37]  T. Ericsson,et al.  Vertical distributions of plant nutrients and heavy metals in Salix viminalis stems and their implications for sampling. , 1998 .

[38]  D. Hayes,et al.  Pilot‐Scale Aerated Submerged Biofilm Reactor for Organics Removal and Nitrification at Cold Temperatures , 2008, Water environment research : a research publication of the Water Environment Federation.