Green Technology

Pervious concrete can allow for hardscape areas while not causing / contributing to rain water runoff often resulting from development.  Compared to typical concrete it has little or no sand it has about 20% interconnected voids that let water pass through … to the soil below.

“ … can take in stormwater at a rapid rate of over one thousand inches of water per square foot per hour, which far exceeds the flow rate needed to prevent runoff in even the most severe rain events. “

This results in little of the water runoff problems caused by imperious paved areas and allows rain to seep back into the ground and recharge aquifers.

Via:  Bay Area Pervious Concrete  LINK

Posted by Green Dude at 09:35 AM | Permalink | Comments (0) | TrackBacks (0)

I found this interesting guide to building a green roof.  I have not tried it (I do not have a flat roof) but it seems do-able.

Green roofs can make your home cooler in the summer and warmer in the winter and can control  water runoff. 

 Here is what a green roof might look like in cross section.

NOTE: Only you or a contractor can determine if this is safe for your roof. !!

Via:  Instructables  LINK

Posted by Green Dude at 09:16 PM | Permalink | Comments (0) | TrackBacks (0)

IBM creates analytics that enable watershed management in collaboration with The Nature Conservancy.  Online modeling tools allow users to understand water quality impacts.  …

…   “Typically, tools and information -- especially satellite information and analytical tools -- have been hard for the average watershed manager to obtain.

Rivers for Tomorrow will address this challenge by making the information readily available. It will even provide software so managers can take spending issues into consideration when formulating their plans.”   …

Via IBM: Rivers for Tomorrow (PDF).

Rivers for Tomorrow Website.

Posted by Green Tech at 08:38 PM | Permalink | Comments (0) | TrackBacks (0)

"The Delaware Solid Waste Authority ... is near completion of an environmentally green project of constructing a landfill phyto-cap (vegetative covering) over a landfill for the purpose of treating leachate generated by rainwater and decomposition of materials at the Solid Waste Management Center in Sandtown, Del."

" ... generates an average of 8,000 gallons of leachate each day. ... natural cap, technically known as a “phyto cap” was the answer utilizing an environmentally friendly leachate treatment system that avoids having to transport and store the waste."

" ... The phyto cap is 25-acres in size and consists of man-made wetlands and over 10,000 planted trees that play a crucial role in the water recycling process. ..."

Via: Water Efficiency  LINK

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Brooklyn may not be the first place you thing of when ROOFTOP gardens come to mind ... BUT Roof Top Farms grows pumpkins, peas and other produce - organically.

" ...The garden, 15 m above the Greenpoint sidewalk, is like a peaceful oasis in an otherwise throbbing industrial district. ..."

" ... Rooftop Farms project started in 2008 ... About 90 tonnes of specially mixed soil from Philadelphia was spread on the roof in March 2009 ... The garden users receive organic waste for their patches from the restaurants who by some of the vegetables, enabling them to avoid the use of artificial fertilisers."

Other benefits include controlling water runoff and less water treatment needed as well as possible reduced heating / cooling loads on the buildings.

Via: Sustainable Cities  LINK

Posted by Green Dude at 06:32 AM | Permalink | Comments (0) | TrackBacks (0)

The UTS Tower in Sydney, Australia is may get a proposed upgrade - a solar skin.  This PV "wrap" would turn the tower into a very green and energy efficient structure.

The University of Technology Sydney (UTS) Tower "upgrade" is " ... Fueled by the university’s sustainability drive ... turn the building into a “landmark environmental tower” by wrapping it in a photovoltaic skin."

"The sustainable energy system, devised by postgraduate students in 2008, has been funded to allow students to build and test the project."

 There are a number of propose upgrades including wind turbines and cogeneration ... the solar skin " ... stretches around walls and roof elements ... the building is covered in a lightweight composite mesh textile that can collect rain water, generate electricity and complement the plan’s passive ventilation system that uses natural convection."

Via:  SmartPlanet  LINK

Posted by Green Dude at 06:15 AM | Permalink | Comments (0) | TrackBacks (0)

Looking to add a green roof?  Lots of building are now sporting green roofs.  There are a number of environmental and economical reasons to green the roof.  A green roof can even help get a LEED certification.

"Urban Heat Island Mitigation ... Green roof vegetation helps by cooling the air, slowing air movement and acting as a substrate for pollution to settle out and detoxify. ... Noise Reduction ... Plants, soil, and air trapped in the soil are great acoustic insulators.  ... green roofs can reduce indoor sound by as much as 40 decibels ... Fire Prevention ... Succulent green roof plants help reduce the risk of fire. ..."

"Water Conservation/Reduction of Storm Water Runoff ... green roof systems acts like a sponge and absorbs excess rain water ... green roof systems can reduce runoff by up to 90+% annually ... Habitat Recreation
Plants and soil help recreate habitat for butterflies, insects, and songbirds. "

Check out LiveRoof for more information.

Via:  LiveRoof LINK

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Oberlin College's Living Machine® is a waste water treatment system that teaches students how nature purified water for years ... but is unlike most modern systems.

"Invented by Dr. John Todd, of Living Machines, Inc. ... Wastewater flows from the building into two underground reactors ... an anaerobic biological process begins digestion of the wastes.  ... wastewater flows through two closed aerobic reactors ... where the remaining organic compounds are further degraded. ...[then] ... enters the Living Machine® solarium and flows through three open aerobic reactors. ... plants such as papyrus, calla lilies and willows root into the planted aerobic reactors and assist in the treatment process."

" ... biosolids are settled out of the wastewater in a clarifier. ... then flows through a constructed wetland surrounding the open aerobic tanks for final ‘polishing.’ Ultraviolet disinfection is the final step prior to the treated wastewater being reused in the buildings’ toilets."

Posted by Green Dude at 09:09 AM | Permalink | Comments (0) | TrackBacks (0)

Zeba has developed an interesting product that can help conserve water.  A white granule is mixed with the soil and it holds 500 x weight in water.  When it rains it absorbs the extra water and releases it slowly over time.  This lets farmers take advantage of rain by having more soaked up near the plant and released when needed - rather than run off into streams.

" ... superabsorbent polymer based on natural cornstarch, making it biodegradable, nontoxic and odorless. ...  a water-insoluble, net-like matrix in the form of a hydrogel that holds and releases water for use by plants as needed.

" ...  able to absorb more than 500 times their original weight. ... slowly releases just the right amount of encapsulated moisture in response to plant root suction. T... process is repeated hundreds of times over a growing season or more before Zeba loses effectiveness.

" ... cornstarch based material is biodegradazble"

Via:  Zeba LINK

Posted by Green Dude at 05:45 AM | Permalink | Comments (0) | TrackBacks (0)

Pervious pavement solve the need for a hardscape surface that can also allow water to soak int the earth rather than flow into a storm sewer. Among the more costly means to handle water are catch basins and ponds to allow for a more controlled flow and absorption.

" ... a unique and effective means to address important environmental issues and support green, sustainable growth.... porous concrete is instrumental in recharging groundwater, reducing stormwater runoff, and meeting U.S. Environmental Protection Agency (EPA) stormwater regulations. ... pervious concrete is among the Best Management Practices (BMPs) recommended by the EPA ...  for the management of stormwater runoff ..."

" ... Typically, between 15% and 25% voids are achieved ...  flow rates ... typically around 480 in./hr (0.34 cm/s, which is 5 gal/ft²/ min or 200 L/m²/min),... "
 

Via:  PerviousPavement  LINK

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