Week 7
Greywater Recycling & Reuse
BURAK ÇELİK
ADA412 Contemporary Problems in Urban Sustainability Bilkent University Department of Architecture 18.03.2018
Greywater is defined as wasterwater generated from hand basins, showers or baths which can be recycled on-site for uses such as Water Closet(WC) flushing, landscape irrigation and constructed wetlands.
Greywater may contain traces of dirt, food, grease, hair, and certain household cleaning products. While greywater may look “dirty,� it is a safe and even beneficial source of irrigation water in a yard. They are valuable fertilizer.
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Blackwater is wastewater collected from WC flushing and kitchen sinks. This water cannot be used in-home because of high risk of contamination by viruses, bacteria and pathogenes.
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Grey Water Recycling Socities today have become increasingly focused on ways to conserve water by reusing greywater. There are many benefits to recycling greywater. For instance, Recycling grey water can reduce the strain on water treatment plants, septic systems and fresh water. Because recycled grey water can be used to irrigate the land around your home, it can dramatically decrease the cost of fresh water at home, and precious fresh water can instead be used on other more important uses such as cooking and drinking.
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Greywater recycling can also help recharge the natural balance of ground water and allow for the redevelopment of an otherwise useless property by allowing for the removal of grey water where a septic system is not feasible. Recycled grey water can also help to provide your plants with a more nutrient-rich soil and maintain the soil's integrity. This often means a bigger and more bountiful yard and garden.
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Advantages of Greywater Reuse 1.Reduce the demand on your reservoir/toilet distribution pumps 2.Increase the lipespan of septic systems 3.less strain on public sewage treatment systems 4.Reduction In energy used for water facilities 5.Save Water(30-35% reduction) and Money 6.Increase points to reach LEED certificate goals 7.Groundwater recharge 8.Reclamation of otherwise wasted nutrients
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Access to Water Problem Water is one of the world’s growing problems- in agriculture, access to clean-drinking water in developing countries, and within the contexts of climate change.
According to the World Bank, 88% of disease in the developing world is caused by unsafe drinking water. Diseases from microbial pollution may be the result of the contamination of drinking water by: Human or animal feces containing pathogenic bacteria and viruses that may cause cholera, amoebic and bacillary dysentery and other diarrheal diseases.
Parasites, such as Dracunculus medinensis, in organisms living in the water
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The Solution? Save It!
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References: http://staging.skoll.org/2016/08/31/universal-access-to-sanitation-how-do-weget-there/ https://www.hollandamerica.com/assets/sustainability/EN-21-wastewaterdistribution-2012-sustainability.htm?WT.ac=sustain2012Water_EN21-wastewater https://www.slideshare.net/MelvinEldin/grey-water-recycling-system http://faculty.washington.edu/categ/healthanddevgbf/wordpress/wpcontent/uploads/2010/03/Access-to-Safe-Drinking-Water.pdf