A non-partisan, neutral perspective supporting diversity in the color of water

Monday, March 27, 2017

Purifying in Plano

From out of the Oregon "grey skies festival", I heard from friend and colleague Paul James of IrriGRAY fame. Paul is a long-time follower and contributor to the Rainbow Water Coalition, first through the incredible Australian Hughie Sinks when we first met during his tenure in Eugene, OR. Now, Paul reports he is a permanent resident, in Plano TX, and for the past 5 years have been developing and improving the IrriGRAY system as VP Research & Product Development with Water ReNu LLC.

From Paul's "reintroductory" message:

IrriGRAY automatically manages graywater, rainwater, potable water, well water, condensate and drain water irrigation across up to 16 zones, with real weather based ET irrigation  in CA, AZ, and TX with more to come (areas not provided with real weather use historical ET data as basis for irrigation).

Our primary strength is being what I consider to be the most advanced graywater irrigation system anywhere, yet at a starting cost of $4,150 for the base residential version. The commercial version tops out at about $6,500. We have found that payback for a family of 3 – 4 in any location where water is ~$4 – 5 per 1,000 gallons has a payback period of between 2 – 5 years subject to size of landscape and climate.  Our primary market at this stage is new home construction and multi-family construction in TX, although CA, AZ, NM are building. We have stayed away from NSF350 treatment methods as the payback period as far too long for almost all clients. Although mainly a manufacturer, we do find ourselves being dragged into some larger installations, particularly LEED and Emerald green building developments.

But that is not all that is "grey matter related to greywater" going on in Plano.

Khushi Thakkar of the Texas Academy of Science, Plano, TX presented A Novel Approach to Purifying Greywater for Agricultural and Third World Applications in February, 2017.

Droughts in the U.S alone have cost the economy billions of dollars and thousands of jobs. To conserve water, stringent water restrictions are put in place, but these restrictions prevent plants from carrying out crucial biological processes and still do not balance the amount of water that households waste each day. To solve these issues, a water filter was engineered to remove household contaminants such as soap, oil, and food particles from greywater to be used for agricultural purposes. The effectiveness of Commercial Grade, Banana-Peel , Orange Peel, Tea-Waste, and Coffee-Waste Derived Activated Carbon was tested against 4 forms of greywater. Results concluded that the Banana-Peel Derived Activated Carbon removed 87% of contaminants on average, making it the most effective form of activated carbon. The filter was composed of a 2 step design consisting of both a Primary and Secondary filter. The Secondary Filter allowed dense contaminants to sink, then pushed water into the Primary filter, which was composed of Banana-Peel Derived Activated Carbon, Sand, and Gravel. In order to test if the water filter was safe for both plants and invertebrates, growth and biological processes of grass and Daphnia magna were analyzed respectively. A comparison of grass growth and the analysis of heartbeat patterns of Daphnia magna in tap water, filtered, and contaminated water concluded that the filtered water supported healthy plant growth and was safe for aquatic organisms. Overall, this water filter proved to be a cost efficient, effective, and an environmentally friendly approach for filtering out household contaminants from water.
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Plano the 19th Happiest Place to Live in the USA, #1 in Texas

1 comment:

  1. Whole house water filtration is more comprehensive than the previous three types. It is also more expensive. Beside the classification, water filtration used different method for filtering water. XAMMAX water filters