Grey Water and Sewage: Understanding the Benefits and Treatment Processes

16SCVE411 | 151CVE411 | ENTG13002 Technology Project Planning
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Environmental science
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2.2.1 Grey Water (Abdullah)
Greywater refers to gently used wastewater obtained from sources among them laundry,
kitchens as well as bathroom. Greywater is relatively clean and is not comparable to blackwater
(water from toilets). Any water that drained from a dwelling unit with the exception of toilet
water can be classified as Grey water. Grey water may as well be containing hair, grease, dirt or
certain household cleaning products as part of its traces (Chong et al., 2015).
Despite looking dirty, grey water is usable for other purposes and might unnecessarily be
recommended for disposal into the sewage system, as is the case with other waste types.
Grey water can be collected through various ways as follows:
 Manual collection: This method requires just a bucket as well as a jug that are used in
the collection of the water by hand. The water may then be used for the purposes of
irrigation or even as a substitute for fresh water for flushing (Oh et al., 2018).
 Simple Piping: This technique adopts plumbing connection between the wastewater
drainpipe of washing machine and the lawn. The water finds its way to the yard through
the underground piping. This method is accompanied with low costs of maintenance.
 Integrated Sewage and Piping: Involves the integration of the entire houses plumbing
into a system of Grey water collection.
2.2.1.1 Benefits of using Grey water (Abdullah)

16SCVE411 | 151CVE411 | ENTG13002 Technology Project Planning
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a. Conserves freshwater: The use of Grey water lowers the amount freshwater that is
utilized in the household for other purposes.
b. Reduction of wastage of water: Using grey water for other functions that are
performed by freshwater serves to lower water wastage by half (Bui et al,2016,p
14).
c. Lowers energy consumption: Energy demand for pumping water in and around a
house is reduced with a reduction in demand for fresh water.
d. Reduced consumption of chemicals: By reducing the amount of water directed to
the sewage plants result in a reduction in the levels of chemicals used in the
treatment of water.
o Landscape beautification.
o Enables reuse of nutrients.
o Filtering of organic substances from water.
o Recharge of ground water.
o Operation of the Greywater system.
The Greywater system process encompasses three stages, among them:
Stage 1:Greywater collection: Collection is done from the washing machines, sinks or even
bathes through either piping or with sinks.
Stage 2: Storage and treatment:
Storage is encouraged for not more than 24 hours to determine that there is no accumulation of
bad smells.
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Stage 3:Use of Greywater: The system should be linked in the most recommended manner to
guarantee the term of use. (Bui et al., 2016).