Grey water

The Presentation includes grey water it is all wastewater that is discharged from a house, excluding black water, uses of waste water, various methods adopted to use grey water [i.g, irrigation, bathing , gardening etc.]

1. Affiliated to Gujarat technological university Tolani F. G. Polytechnic BUILDING SURVICES (3360604) SEMESTER VI DEPARTMENT OF CIVIL ENGINEERING APREL 2017

2. Prepared and Presented by Amit Mali - 146510306033 In-charge Faculty Mr. RAVI R. GURNANI BUILDING SURVICES (3360604)

3. CONTENTS introduction Definition Quantity of grey water Composition of grey water Grey water from bath room Grey water from washing Grey water from Kitchen Need of grey water Management Grey water treatment system Components of grey water Uses of grey water Guideline for reuse of grey water

4. Now with the growing population it is very necessary to reuse the raw water mostly for Indian country where more than 70% people depends upon the agriculture where there is not a fix time for rain and former is mostly depends Upon tubell, well and canal in that way grey water is also a medium for irrigation . Introduction

5. definition grey water Grey water is all wastewater that is discharged from a house, excluding black water (toilet water).This includes water from showers, bathtubs, sinks, kitchen, dishwashers, laundry tubs, and washing machines It commonly contains soap, shampoo, toothpaste, food scraps, cooking oils, detergents and hair. Grey water makes up the largest proportion of the total wastewater flow from households in terms of volume. Typically, 50-70% of the household wastewater is grey water. It has low concentrations of organic matter. It is also called as sullage . It contains of small amount of bacteria.

6. Percentage of grey& black water 31% Black Water 69% Grey Water

7. Sources of grey water shower tap bath

8. TYPE OF GREY WATER There is mainly two type of greywater Low loaded greywater (raw water coming out from shower, bathtubs & handbesins.) High loaded greywater (raw water coming out from kitchen, dishwasher, washing machine.)

9. Quantity of grey water The amount of waste water generated by house hold will very greatly according to the dynamics of the household, and is influenced by the following factors: The number of occupants The age distribution of the occupants The life style characteristics of the occupants The cost of water Water use patterns The climate

10. Quantity of grey water while the water consumption in poor areas is about 20-30 liters/person/day, a person in a richer area may be generated several hundreds of liters a day. As per IS:1172-1993, minimum domestic water requirement for India is 135 liters/head/day . when planning for water supply and sanitation it is essential to control water consumption. People should be provided with fresh water for basic needs while unnecessary consumption should be prevented. An efficient use of water is crucial wherever the water resources is scarce, to reduce the generation of waste water.

11. Composition of grey water

12. Need of grey water Management To remove substance that may be harmful to human health. To remove substance that may be harmful to plants and soil. To remove substance that may be harmful to the environment. To remove substance that may clog the irrigation system. To prevent contamination of ground water and drinking water reservoirs. To avoid damage to building and surrounding areas from inundation, water logging and freezing. To avoid the certain of bad odors, stagnant water and breeding sites for mosquitoes. To prevent eutrophication of sensitive surface waters.

13. Grey water treatment system Grey water treatment system Primary diversion system Secondary treatment system gravity diversion system Pump diversion system Active sludge treatment Constructed wetlend

14. Grey water treatment system The choice of system depends on the following factors: The owners willingness to operate and maintain the facility. The sources of grey water to be recycled. The purpose of grey water reuse.

15. Grey water treatment system 1. Primary diversion system Primary diversion methods are use coarse screen filters or sedimentation to remove oils , grease and solids prior to discharge to the land application areas. These system are likely to be considerate the most economically attractive for grey water use because maintenance can usually be carried out by the home owner, and they generally do not rely heavily on electricity or chemicals to operate. These include two methods gravity diversion system pump diversion system .

16. 1. Gravity diversion system A gravity diversion device incorporates a tank-activated value, switch or tap which is fitted to the outlet of the waste pipe of the plumbing fixtures, such as the laundry tub. The plumbing diversion device can be switched by the householder to derive grey water from the laundry tub by gravity directly to the diversion line and the proposed land application area. The gravity must not be stored.

17. 2. Pump diversion system

18. 2. Pump diversion system

19. 2. Secondary treatment system Secondary treatment system further treat the grey water to remove more of the oils/grease, solids and organic materials. This allows secondary treated grey water to be irrigated via micro-drop or surface irrigation methods. These system are generally more expensive due to the initial establishment costs associated with the continuing treatment needs and ongoing maintenance cost. however, the treatment level enables a much more conventional surface irrigation system and presents less of s health risk in the case of human contact. There are many types of secondary system including: Slow sand filter Activated sludge Constructed wet lend Trickling filter

20. Slow sand filter

21. Activated sludge

22. Trickling filter

23. Components of grey water Plumbing system Surge tank Screens and filter Pump Irrigation system

24. 1. Plumbing system A pipe system is always needed to collect and lead water to where it is treated or uses. Designing and plumbing a collection system is similar for grey waste water. As there is no need for transporting toilet waste, thinner pipes can be used for grey water compared to mixed wastewater. All pipe systems must be equipped with ventilation for air and smell evacuation. Normally a self ventilating pipe arranged as a chimney above the roof is enough for this. Bad odours will sooner or later arise in the collecting system. Therefore all pipe connections in the house must be equipped with water traps. clogging from fats is a potential risk in grey water systems that must always the considered, especially when the pipe system is enlarged and water cools in of ground. Pipes must be put straight (no necks or depressions) with gradient atleast 0.5% ( i e. 5 mm/m). The pipe system must always be equipped with flushing pipes/wells if clogging could occur.

25. 1. Surge tank In the grey water system,  is surge tank used to collect and temporarily store water,  but it is not a storage tank.  Water from the surge tank is delivered to the application area by gravity flow or by pumping.  The tank must be solid,  durable,  watertight when filled,  and protected from corrosion.  The tank must be vented and have a locking gasketed lid.  It must be anchored on dry,  level,  compacted soil or on a 100 mm thick PCC slab.  The capacity of the tank and "GRAY WATER IRRIGATION SYSTEM DANGER UNSAFE WATER.  must be

26. Surge tank

27. Surge tank

28. 3. Screens and filter

29. 3. Screens and filter

30. 4.pump

31. 4.Irrigation system The grey water standards allow two types of irrigation system: 1.Subsurface drip irrigation 2.mini-leach irrigation 1. Subsurface drip irrigation system

32. Mini-leach irrigation

33. Uses of grey water Watering Gardens Fire hydrants Field Irrigation Toilet flushing Cooling tower make-up

34. Advantages of grey water Save water (30-35% reduction in consumption) and money Reduce the demand on your reservoir/toilet distribution pumps Increase the lifespan of your septic system Less strain on public sewage treatment system Reduction in energy use by the municipality Increase points to reach LEED certification goals Groundwater recharge Reclamation of otherwise wasted nutrients

35. REFRENCES: https://mail-attachment.googleusercontent.com/attachment/u/0/ ? https://en.wikipedia.org/wiki/Drip_irrigation https://en.wikipedia.org/wiki/Drip_irrigation https://www.uwyo.edu/owp/_files/finalreportp11.pdf https://en.wikipedia.org/wiki/Screen_filter https://en.wikipedia.org/wiki/Surge_tank https://en.wikipedia.org/wiki/Trickling_filte r https://www.uvm.edu/~ewb/.../Grey%20Water%20in%20Developing%20Countries.pd... https://en.wikipedia.org/wiki/Secondary_treatment Building services (3360604)

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