英语翻译Grey water is defined as all flows exiting an urban buil

英语翻译
Grey water is defined as all flows exiting an urban building,
excluding toilet water.Grey water can be considered a
suitable candidate for reuse because it is consistently
produced and is available onsite for reuse.Applications for
the reuse of grey water include toilet flushing and garden
irrigation.Grey water can be further classified as low load and
high load in terms of organic strength.Low-load grey water
excludes the more polluted kitchen and laundry wastewater
(Friedler,2004).Treatment of grey water can range from
simple coarse filtration (March et al.,2004) to advanced
biological treatment (Nolde,2005).Previous studies have
suggested that biological processes should be preferred due
to the high levels of organics in the water (Nolde,1999;
Jefferson et al.,2004).Biological greywater treatment technology
options for greywater reuse include membrane bioreactor
(Jefferson et al.,2000),rotating biological contactor (Nolde,
1999; Friedler et al.,2005) or constructed wetland (Dallas and
Ho,2005).