Thursday, February 21, 2013
Sunday, February 17, 2013
Oregon finally admitted a "deep" secret about groundwater in the northeastern corner of the state. According to this article in The Oregonian, pumping from the basalt aquifers in the Umatilla Basin has led to "...among the steepest declines worldwide". And it sounds like the previous concept of selling "Oregon's Oil" to the highest bidder might turn into the largest Aquifer Storage and Recovery (ASR) project in North America - up to 25,000 acre-feet a year. At least that is the idea and a consensus agreement was signed to start exploring how to use more of Oregon's Oil for irrigation. Regardless of how this notion ultimately plays out, it does not look like the greywater footprint associated with the irrigated agricultural use is projected to increase in the Columbia River in the future (see Ecological Indicators 18 (2012) 42-49).
However, the bigger news is this article in Knovel about OriginOil, where the American biomass company has teamed up with the French company Ennesys to demonstrate how cultured algal growth can be used in energy supply and distribution:
Using a series of specially-designed pipes and algae harvesters, engineers have created a system that takes the wastewater generated by the occupants of the building and channels it into polycarbonate tubes mounted on the side of the structure. These flat-paneled tubes then use the combination of light, CO2 and flushed wastewater to cultivate algae, which is constantly nourished by the nutrients contained in the water being filtered through the system.
As an added bonus, the tubes act as insulation for the building, another method of reducing the energy consumption and the process is repeated until the nitrates are depleted. Once this occurs, the wastewater can be used as greywater for toilet-flushing.
Could OriginOil be Oregon's answer to the nitrate problem in the Lower Umatilla Basin Groundwater Management Area, thus cleaning up some of Oregon's Oil for sale to the Californians (postscript - Planet Green TV discontinued the Supper Club video series, so one can't watch the classic video of a Californian admitting to stealing the Columbia River water)?
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Friendship and money: oil and water.
~Author Mario Puzo
Posted by Todd Jarvis at 5:55 PM
Monday, February 11, 2013
I rarely repost other blog postings, but I am in Washington, DC at a National Institutes for Water Resources meeting and traveling quite abit over the next month. So, Watery Foundation had a great posting on water reuse (Florida is the biggest "reuser" in the US) and they located a great story about folks in Texas getting over the "yuck factor".
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There are only two mantras, yum and yuck, mine is yum.
~Author Tom Robbins in Still Life with Woodpecker
Posted by Todd Jarvis at 8:07 PM
Wednesday, January 30, 2013
Eighth grade water reuse expert Avni Limdi is a follower of the Rainbow Water Coalition. She contacted both Waterwired and the RWC for advice on her science fair project a couple of months ago. Waterwired served as the online mediator of the information exchange posted here.
The Water Resources Graduate Program at Oregon State University awaits Avni's application to graduate school.
Avni contacted me two days ago with the following news:
Thank you so much for your help with my project. It really paid off, I made it to reigonals science fair! Attached is my science project report. Once again thank you for all your assistance!Blogger does not permit attachments, so the RWC highlights another Great Greywater Student Project with some of the findings of her 30 page report titled "Greywater to the Rescue"
If grass specimens are watered with biodegradable graywater, graywater, and tap water over an approximate six-week duration, then all grass specimens watered with biodegradable graywater will grow at least 1 centimeter taller than those watered by graywater and tap water. If Dracaena Godseffiana (Indoor) plant specimens are watered with biodegradable graywater (BGW), graywater (GW), and tap water (TW) over an approximate six-week duration, then all Dracaena Godseffiana specimens watered with biodegradable graywater will grow at least 0.5 centimeter taller than those watered by graywater and tap water. The evidence to support this is that biodegradable detergent contains ingredients that will both enhance growth and not harm the specimens.
The independent variable is the type of water used to water the specimens: biodegradable graywater, graywater and tap water. The dependent variable is the height of the plant or grass specimen: measured in centimeters. The control group is the plants and grass that are watered with tap water. The constants are amount of water used to water all specimens, environment, and type of soil used for each specimen type.
The purpose of the experiment is to determine if different types of water affect plant growth. The hypothesis of the experiment was if grass specimens are watered with biodegradable graywater, graywater, and tap water over an approximate six-week duration, then all grass specimens watered with biodegradable graywater will grow at least 1 centimeter taller than those watered by graywater and tap water. The hypothesis for the Dracaena Godseffiana (indoor) plant specimens was if plant specimens are watered with biodegradable graywater, graywater, and tap water over an approximate six-week duration, then all Dracaena Godseffiana specimens watered with biodegradable graywater will grow at least 0.5 centimeter taller than those watered by graywater and tap water. The evidence to support the hypothesis is that biodegradable detergent contains ingredients that will both enhance growth and not harm the specimens.
The hypothesis is partially supported across both plant and grass specimens. The results show that for both plants and grass, all specimens watered with BGW grew most, the specimens watered with GW grew second most, and the specimens watered with TW came last.
For grass, BGW grass specimens grew 1.33 centimeters more than TW grass specimens, thus proving the hypothesis (> 1 centimeter). On the contrary, for grass, total growth difference between the BGW specimens and GW specimens was only 0.78 centimeters, thus disproving the hypothesis (< 1 centimeter).
For plants, BGW plant specimens grew 0.83 centimeters more than TW plant specimens, thus proving the hypothesis (> 0.5 centimeter). On the contrary, the BGW plant specimens grew 0.37 centimeters more than GW plant specimens thus disproving the hypothesis (< 0.5 centimeter).
The scientific explanation for the results is that both biodegradable graywater and graywater contain organic matter in them, like suspended solids (food particles), dead skin cells, hair, bacteria, enzymes, and residue from kitchen and laundry sinks that could have spurred growth. Agricultural studies show that organic matter is a known reservoir of nutrients that can be released to the soil. Each percent of organic matter in soil releases 20 to 30 pounds of nitrogen and 4.5 to 6.6 pounds of phosphate. The increased nitrogen and phosphate availability and higher uptake would result in spurred plant growth. Scientific research shows that organic matter behaves in a sponge-like manner, with improved water absorption and retention and ability to release most of that water to plants. Additionally, organic matter improves soil structure by causing soil to clump and form aggregates. This causes the soil to have better water permeability, which in turn improves soil’s ability to take up and hold water. Organic matter presence also improves toxicity filtering, fertility and diversity of life. Tap water contains chemicals like chlorine and other disinfection by-products that could hinder growth and affect the results.
This experiment concludes that graywater and biodegradable graywater can be safely used to water grass, and in fact may be preferable over tap water. By the third week in the experiment, the GW plant specimens were losing leaves, and many leaves showed signs of wilting, several leaves were exhibiting leaf burn, but overall the plants were still showing growth. So it is important to note that for indoor plants, graywater may not be the ideal type of water to use.
Attempts to limit errors included, keeping the same type of soil, using the same amount of water, watering all specimens at the same frequency and time, and keeping the same environment (southwest sunlight exposure and 70 degrees temperature). Some possible sources of error were the inconsistent amount of dirt or soil on the clothes and dishes used to make graywater and biodegradable graywater.
Some improvements to the experiment could include monitoring dryness of each specimen soil, measuring soil water retention, measuring soil pH, ensuring on a regular basis that drain holes were not clogged, measuring presence of chlorine, disinfectants and harmful contaminants in tap water. An expansion of this experiment could be to study the effects of graywater on the soil as well as study different types of plant specimens such as outdoor trees, ornamental bushes and crops. Another expansion could be to test several other types of water, like greenwater and redwater, on plants.
In the real world, this information can be used to help the world in many ways. If graywater is used to water lawns and other plants, it will save a great deal of freshwater. Valuable freshwater will no longer be needed to water lawns and other plants, and graywater will not be drained into the sewer. By reusing graywater, we will conserve freshwater for future generations.
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Almost everything that is great has been done by youth.
Posted by Todd Jarvis at 11:07 AM