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Sammanfattning

Grey water constitutes the largest fraction of domestic wastewater. It causes environmental sanitation and pollution problems if it is not managed well. If treated, grey water can be a resource for a variety of uses. A pilot system was constructed in February 2013 to treat grey water from a four-member household for sub-surface irrigation of local vegetables. A hydraulic loading rate (HLR) of 60 L m(-2)d(-1) and an organic loading rate (OLR) of 519-1,580 g BOD(5)m(-2)d(-1) were implemented on a multi-media filter of gravel, charcoal, geotextile and mulch (charcoal being the predominant layer) operated as a batched type-system, with a 36-hour retention time. The system was operated for 3 months, during which it showed remarkable removal efficiencies of 90.8 +/- 5.4 and 96.1 +/- 3.0% after 36 hours for chemical oxygen demand (COD) and biochemical oxygen demand (BOD), respectively, and 95 +/- 3.1% for faecal coliforms (FC). The removal efficiencies at 36 hours, of total nitrogen (TN), total phosphorus (Tot-P), total suspended solids (TSS) and total dissolved solids (TDS) were 39.0, 30.1, 85.2 and 78.6%, respectively. Plant response to sub-surface irrigation with treated grey water was largely masked by rainy season and the effluent had a limited effect on the soil.

Nyckelord

grey water; household; reuse; sub-surface irrigation; treatment

Publicerad i

Journal of Water Reuse and Desalination
2014, volym: 4, nummer: 4, sidor: 294-307
Utgivare: IWA PUBLISHING

SLU författare

Globala målen (SDG)

SDG3 God hälsa och välbefinnande
SDG6 Rent vatten och sanitet för alla
SDG11 Hållbara städer och samhällen

UKÄ forskningsämne

Husbyggnad
Vattenteknik
Infrastrukturteknik

Publikationens identifierare

  • DOI: https://doi.org/10.2166/wrd.2014.016

Permanent länk till denna sida (URI)

https://res.slu.se/id/publ/66313