Four Benefits of Gray Water Harvesting

 Gray water refers to wastewater that has been gently used. It usually comes from showers, lavatory sinks and laundry. It differs from rainwater in that it requires a more robust filtration and sanitation system to treat it for reuse. Installing a gray water harvesting system provides these benefits:

 1. Reduce dependence on municipal water. – It does not make sense to flush toilets will high-quality drinking water.  Gray water can act be a good alternative for applications such as flushing toilets and irrigation. With a sufficient filtration and sanitation that a properly design harvesting system provides, a supply of gray water can significantly lower the amount of municipal water a property uses.  This benefits the community by reducing the load on local resources.

2. Reduce municipal water bill. – The direct result of conserving the amount of municipal water a property uses is a reduced water bill.  The right gray water harvesting system can save thousands of dollars each year.

 

3. Ensure a predictable supply of water. – Since gray water typically comes from showers and lavatory sinks, is often a constant supply. However, it calls for an efficient and reliable processing system to ensure that the water is properly treated and ready for use.

 

4. Conservation of water. – When gray water is used for multiple applications, it reduces the strain on our natural resources.  In areas where water is scarce, gray water harvesting is an important sustainability strategy.

 

 Be sure to contact a reputable specialist to get the right gray water harvesting system, which should be compliant with the NSF/ANSI Standard 350 or IAPMO 324 for effectiveness and safety.

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A Step-By-Step Guide on Gray Water Harvesting System

Unlike rainwater or stormwater, gray water, or greywater, refers to water that has been “gently used”  from lavatory sinks, showers, baths and light industrial applications and has not yet been treated.  It can be harvested and treated for non-potable application such as flushing toilets, irrigation and cooling tower make-up. Gray water supply can be predictable and steady, resulting in potentially high water savings. However, it must be treated properly to produce a water quality that is safe and adheres to local codes.  A proper greywater system includes the following:

• Collection - When gray water is collected, it must be treated as soon as possible to stabilize and prevent it from becoming septic. Untreated gray water is never stored longer than 24 hours.  The collection vessel should have a sloped or conical bottom, allowing for the tank to be fully drained.

• Filtration –Filtration is one of the most critical steps in gray water harvesting system . In addition to removing hair and lint, the system must be able remove particulates to a level that will allow the sanitation process to be effective.

• Sanitation – After gray water filtration, the water is sanitized for use. Chlorination and ultraviolet sanitation methods may be applied to accomplish this.

• Storage – The method of storage for the treated gray water will depend on how the gray water  harvesting system is used, the supply and demand, and the available space for the tanks. Typically, the storage system is connected to a municipal water source in case there is not enough gray water supply.

• Monitoring – Sophisticated gray water harvesting systems have programmable logic controllers to automate and oversee the whole process of harvesting and storage.