WATER RECYCLYING

 

 

INTRODUCTION

n  Increasing demands on limited water resources have made wastewater recycling (reclamation or reuse) an attractive option for extending water supplies.

 

n  Treatment technologies have evolved such that recycled water is of sufficient quality to satisfy most non-potable demands, and as such, recycled water has increasingly been used for municipal irrigation, toilet flushing, industrial cooling, and other applications. Many communities are currently engaging in discussions about the possibility of using recycled water to meet potable demands as well.

 

DEFINITION

n Decentralized system collecting rainwater or greywater for supply to non potable uses such as WC flushing, clothes washing and various outdoor use are becoming increasingly common.

PROCESS OF WATER RECYCLING

n Waste water that has already undergone primary setting enters activated sludge basins where beneficial bacteria feed on suspended organic particles.

 

n Secondary clarifiers remove 96 percent of the remaining particles through setting and mechanical separation.

ADVANTAGES OF WATER RECYCLING

n Recycling water is an advantageous way to provide a drinking water supply.

 

n Freshwater is dwindling around the world and many water supplies are contaminated by pollution.

 

n Reverse osmosis purifies water and makes it safe for drinking.

DISADVANTAGES

n Smell

 

n Cuts into natural process where every other persons crap is some organisms food.

 

n Chemical used could be harmful in long run.

DIFFERENCE BETWEEN RECYCLED WATER, RECLAIMED WATER, AND WATER REUSE?

n Recycled or reclaimed water is defined as water that is used more than one time before it is returned back into the natural water cycle.

 

n Recycled water is generally used for beneficial purposes such as agricultural and landscape irrigation, industrial processes, toilet flushing, or replenishing a groundwater basin (referred to as groundwater recharge; WateReuse Association, 2011b).

HOW IS RECYCLED/RECLAIMED WATER DIFFERENT FROM RAW WATER?

n  Through the natural hydrologic cycle, the Earth has recycled water for millions of years. Water utilities use engineered technologies to speed up these natural processes.

 

n  The Colorado River and the Mississippi River are two common sources of raw water in the United States. Along these rivers, the wastewater discharge of upstream communities ultimately becomes the drinking water source for downstream communities—a concept known as “unplanned indirect potable reuse” (IPR).

 

n  The water from these rivers has been reused, treated, and piped into the water supply a number of times before the final downstream user withdraws the water.

IS RECYCLED WATER SAFE?

n  Recycled water is highly engineered for safety and reliability so that the quality of water is more predictable than many existing surface and groundwater sources. Recycled water is considered safe when appropriately used. Although recycled water is of very high quality, it is only tested for its intended use so not all recycled water is suitable for potable reuse. Recycled water intended for indirect potable reuse, whether through aquifer recharge or surface water discharge, receives extensive, multi-barrier treatment.