Any wastewater produced by domestic usage is known as greywater. Our daily life involves water usage in various causes like bathing, cleaning and washing. These already used waters are called greywater. However, sewage water cannot be considered as grey water as it contains larger organic components.
This greywater can be preserved and used for multiple purposes that doesn’t involve drinking. That's why many households around the world are installing effective greywater management systems.
Purpose:
The main purpose of a greywater treatment system is to reuse domestic wastewater for various utilizations. While this water isn’t healthy enough to drink, it can be used to water the garden or clean up unclean surfaces.
Most of our used water usually goes through the drainage system as greywater. With the help of a pump pit, a septic tank, a reservoir and some extra tools, you can build a small greywater treatment plant that will help you save up some drainage water for later use.
RekPro offers Grey water treatment systems GWT , graywater, grey water, gray water or sullage wastewater generated in office buildings or households from streams without fecal contamination. Greywater is generally defined as wastewater from baths, showers, basins, and washing machines. Compared to municipal wastewater treatment, Greywater treatment is easier as it generates a large interest in its reuse and recycling. Generally, recycling and re-use are done for toilet flushing, irrigation, and other non-potable uses.
A crucial part of the sustainable management of water resources is reusing wastewater. For the tourist and arid areas in which the biggest water demand is usually in the dry period, Greywater can be an important alternative water source.
The potential ecological benefits of greywater recycling include:
But still, greywater can get contaminated with several types of insoluble and soluble substances and shall be properly treated. Contaminants like traces of food, hair, dirt, grease, and certain household cleaning products can be contaminated in greywater. Mostly, media filtration and ultrafiltration based treatment technologies are used for this. For preventing bacteria, particles, and viruses that are passing through are prevented by Ultrafiltration. Greywater can ultimately be disinfected with ultraviolet and/or chlorination, for ensuring residual disinfection at point-of-use. It is a very stable process and compact design and High effluent quality and low sludge production.
Benefits of Greywater Recycle
As our groundwater level decreases, we will soon see a reduction in freshwater usage for our daily life activities. In those scenarios, having a greywater recycler in your backyard is an added advantage. Here are some more direct benefits of installing greywater recycling plants.
Greywater treatment is a superb green-earth initiative that can help us as well as our planet. Simple yet effective designs are the best for the conservation of water in dense concrete jungles called cities.
Media Filtration & ULTRA Filtration UF for GREY Water Treatment SOLUTION
For reducing the level of suspended solids in process water, a multimedia filter is used. Small particles like clay, silt, grit, larvae, organic matter, algae, zooplankton, and other microorganisms can comprise suspended solids. For a multi-media filter, the filtration degree depends mainly on the filter media and flow )velocity through the filter. Conventionally, a multimedia filter comprises three layers of filling which are gravel, anthracite, and sand. The courser dirt particles are trapped by anthracite for preventing the formation of a layer cake on top of the filter bed. In the sand layer, the smaller particles get trapped. Particles will adhere to the sand with a low fluid velocity and with a cohesive bonding. The water is allowed to flow evenly by the gravel to the mushroom diffusers and out of the filter media.
The entire filter bed is allowed to function longer between backwash. Particles down to 15-20 microns are removed by a well-operated filter. Particles can be filtered down to 5-10 microns with the use of a coagulant addition. Over the period of time, the pressure drop over the filter rises while the flow remains the same because of the adhered suspended solids. The filter media eventually needs to be cleaned by a process known as backwashing. When the differential pressure exceeds 0.1 to 0.2 bar over the differential pressure of a clean filter, a backwash should be performed. At least once a week, a backwash should be performed for preventing clumping of the media. The flow direction over the filtered reverse with a setup of valves. Depending on the type of the media, at a velocity of 35m/h, the filter bed expands. Due to the raised velocity, the particle detaches. The expanded gap between the grains makes sure that it can exit the vessel. When the velocity exceeds the maximum design specifications the filter bed expands too much which will result in losing media from the top during backwash. The filtered water of another filter or raw water that normally enters the filter at the top works as the source for backwashing the filter. A small amount of raw water entering the system downstream with the use of raw water should be taken into account.
REKPRO
REKAS PROTECH is specialised in Design, Engineering, Supply , Erection Commissioning of Water Treatment Projects, Steel Fabrication, Industrial Turnkey Projects in food and beverage industries mainly focused on GCC, African and European markets.
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