I realized that seawater is not fully saturated with salt
The 17 year old Chai developed a simple technology to transform salty water into fresh water.
“I realized that seawater is not fully saturated with salt. About ten percent of the water molecules are bound to salt, but the remaining 90 percent is actually free. Why does scientists focus that much at that ten percent if we deal with the 90 percent?”
He adds a highly absorbent polymer to the salt water, which adheres to the salt molecules. Then they can easily be separated from the rest of the water.
For example, ten percent is lost – which was attached to the salt molecules – but the remaining 90 percent of the water is fresh water. Link to the video
The membrane was compared with graphene-based rigid technology with better than 70% improvement.
New Nanopore Desalination Technology – University of Illinois The image is a schematic representation of how the filter works. (a) shows the MoS2 sheet with the molybdenum in blue and the sulfur in yellow.
Water appears transparent blue. In (b) we see three types of pores, one molybdenum only, one mixed and one sulfur only.
The study tested all three types to determine relative performance. The membrane was compared with graphene-based rigid technology with better than 70% improvement. The molybdenum-only pores allowed the greatest flow-through rate but overall the MoS2 mix performed two to five times better than current conventional desalination technology.
Clean rainwater tanks with MINIMAL water loss. Sanitize water WITHOUT using Chemicals
Clean rainwater tanks with MINIMAL loss. Sanitize WITHOUT using Chemicals Inoke Mo’unga – OMNI Services Tonga I live in Tonga, a 3rd world country…we are using ozone generators to sanitize the water 99% of all Tongans use for consumption. I work for a family company where our boss has manufactured, with the limited supplies he could get a hold of, a water vacuum. This enables us to clean the rainwater tanks.
He has also, with great cost to himself, purchased an ozone generator that we use to sanitize the water after we clean the tanks.
We are still struggling to make pay each week, but its up to US, here in the (poor) communities to strive for what we can. If outside help ever does come, that will greatly enhance our own endeavors. But it begins with inside the vessel. This is the essence of sustainability. Give OMNI your support
water harvesting from Fog
PH2OG water Michael Thomas In areas without access to surface or groundwater sources but with high incidence of low lying clouds or fog (generally elevated regions), fog harvesting has proven to be an inexpensive alternative. Modern applications were pioneered by Bob Schemenauer and are currently being used by groups from MIT and Princeton. Read more
Drinking water from the air
Drinking water from the air Massimiliano Montesi, Aquaspaera (Italy)
We generate pure drinking water from the air.The powerful fan takes in a large amount of air and to minimize the intake of all the impurities, the WFA=PF pulls air through an electrostatic filter removing 93% off all air particles. The electrostatic air filter effectively prevents micro-particles and dust from entering the appliance.The condensation unit receives the clean humid airflow. The condenser coils are covered with a food grade coating, to minimize interaction between water and the metals using for the cooling coils. Using these coils, allows the water to condense from a vapor into a liquid. Read more
BioCleaner treats water in rivers and lakes to recycle. Here’s how it works
The Warka Towers is pulling drinking water out of condens
I’d add Warka Towers to that list because it is pulling drinking water out of condens Gabriele R. Schubert Here in dry California we’re finally ready to consider atmospheric water generation (AWG)! We either have to go 1,500 miles to the north to get water, or make our own. So after a year of showing the Warka Towers, an example of a fog collector will be built in our central park. Most exciting is the fact that people here are finally realizing the huge volumes of condensation produced by air conditioning(AC), so AC condensate recovery and reuse programs have become the first “condensation technology” to be promoted with the help of the Green Building Council (having been fully demonstrated by our EPA research centers). They average 18,000 liters/day = 5,5 million liters/year. I am working with EPA engineers of AC recovery systems in Georgia and North Carolina, to set up a University of California study collaboration with AWG engineers. We will consider how to merge AC and AWG to maximize condensate generation on building rooftops, in order to bring attention to the fact that dedicated AWG condensation can contribute a significant volume each day. Now the Southwestern US is finally ready to consider how to apply AWGs on building rooftops, and we will also be considering how to apply AWGs at economies of scale (near reservoirs that are now evaporating). I am also working with Tunisia to promote this option, because this is most important for all regions on the front lines of global warming and drought. Please contact firstname.lastname@example.org if you are interested in collaborating in the study. Thank you, BetterWorldSolutions, for raising this very important question! Read more about the Warka Tower
The term osmosis describes the natural diffusion of water through a semi-permeable membrane from a solution of a lower concentration to a solution with a higher concentration
Forward osmosis Erik Desormeaux Forward osmosis is an interesting new option because it can desalinate using a relatively cheap membrane filter in combination with common sources of chemical energy instead of using electrical energy. Examples of stored chemical energy that can be used to filter/desalinate water include common fertilizers if the water is needed for agriculture, a drink mix if needed for beverage make up water, or seawater if wanting to concentrate organics for energy production (via biogas producing digesters) while discharging purified water (from wastewater) to the ocean or for beneficial re-use.
The hollow fiber system provides facilities with a substantial savings in space and power, purifies large quantities of water with low levels of pollution
Novoflow Franz Fastner
Industrial wastewater recycling using ceramic discs.
This system works on the basis of ceramic filters. Due to its special operation, it is possible to purify water for different purposes in a simple way. For example:
for industrial purposes (used in the treatment of industrial process water)
the medical industry where there is need for clean water.
The system is not only effective but also economical and easy to maintain, and uses minimal energy.
BLW-7D 3 channel industrial water purifier treats 225,000 gallons/day
Self Aware Waters Dr. Will Hawkins
This Clean Drinking Water technology is capable of treating industrial water over 2,400,000 gallons per day! The disinfector creates a neutral PH of 7. However, by combining more electrodes, they can create a higher PH or 8.5 and more.
NASA: Scores of independent tests have shown that silver promptly kills bacteria in water and maintains water purity over long periods of time. After testing 23 methods of purifying, NASA has chosen silver as the purifying agent on the Space Shuttle program.
CryoDesalination can concentrate the incoming salt solution to any desired concentration, even to ZLD
CryoDesalination Norbert Buchsbaum CryoDesalination LLC has developed a patented freeze desalination process. It includes a novel ice-brine separation method that makes freeze desalination commercially attractive. The advantages are simplicity, no fouling, no chemicals, low corrosion, thermodynamic efficiency, small environmental footprint, low cost, and economy of scale. A huge body of data is available on freeze desalination technology. The US government financed the construction of several demonstration plants in the 1960’s. A 15,000 GPD freeze desalination plant operated for five years in Wrightsville Beach, NC supplying potable water to the city’s distribution system. However, all plants had trouble in the separation of ice from brine. As a result, large plants were considered not viable and interest in freezing waned. CryoDesalination’s new ice-brine separation technology is the key to a commercially competitive freeze desalination process. CryoDesalination will be large mega-projects for production of potable water. CryoDesalination is also especially well suited for desalinating O&G produced water, coal-bed methane waters, mine effluents, or streams containing any level of salt concentration. The process can concentrate the incoming salt solution to any desired concentration, even to ZLD.Cost and Business case: While great improvements in the energy consumption of desalination processes have been achieved, further efficiency gains are likely to be marginal. Conversely, the processes now in use have not yet realized breakthroughs in capital cost reductions. Capital costs represent approximately 50% of total cost in the production of desalinated water. Therefore, further significant reductions in production cost will require a breakthrough in capital costs. Through economies of scale, CryoDesalination can achieve a ten-fold increase in capacity at only four times the capital cost. In contrast, the capital cost for an RO plant scales linearly with capacity (i.e. a ten-fold capacity increase requires ten times more membrane tubes, which would result in approximately a ten-fold cost increase).
Unique selling point: CryoDesalination’s energy costs are better than or on par with the most efficient conventional systems. However, other operating costs and capital costs are significantly lower thanks to the inherent advantages of freezing; no chemical treatment is required, there is no fouling, and economies of scale can be achieved. Furthermore, corrosion rates are orders of magnitude lower at freezing temperatures, allowing the use of standard, low cost construction materials. No centrifuges, filters, or mechanical separators are required since ice is always a pumpable slurry and separation occurs by flotation.
Technical risk: While freeze desalination plants, under the auspices of the US government, has been applied previously on an industrial scale, CryoDesalination’s novel separation process has so far only been tested (successfully) at pilot scale in Conroe, Texas.
Business model: CryoDesalination will disseminate the process through licensing, joint ventures, and partnerships. Contact: email@example.com
waters high in sulphates (e.g. mine effluents) can be treated using barium carbonate or other barium salts to precipitate out barium sulphate, and then the barium recovered for re-use
Hybrid-Ice technology Ian Pearson – WATSUP Development CC I have enjoyed reading the many and varied responses – and of course they are all important and applicable in different situations. I think the cryodesalination is an important new technology for dealing with really poor quality waters to produce fresh water where the contaminants can be concentrated to a very dense sludge – and then even processed further (chemically) to recover any valuable minerals in the sludge. It sounds similar to the Hybrid-Ice technology, which includes a heat recovery system from the refrigeration process to evaporate the final brine if required. I believe however that sometimes we bypass the older methodologies of using chemical means for cleaning contaminated water. For example waters high in sulphates (e.g. mine effluents) can be treated using barium carbonate or other barium salts to precipitate out barium sulphate, and then the barium recovered for re-use in the process and at the same time recovering sulphur and lime as valuable by-products (which in fact may generate sufficient revenue to pay for the whole process).
Waterbodies are often polluted with sewage, our product is the ideal solution for this
A product to grow Diatom Algae in lakes Bhaskar Mallimadugula – Clean Technology Promoter We havea product to grow Diatom Algaein lakes and reservoirs. Diatoms consume the nutrients, N and P and produce oxygen during photosynthesis. This keeps the lakes and reservoirs clean and well oxygenated and this reduces harmful bacteria, mosquitoes and increases fish catch, since diatoms are the best food for fish. This will reduce not only diarrhea but also malaria and other water borne or mosquito borne diseases.
Waterbodies are often polluted with sewage, our product is the ideal solution for this. Our process efficiently converts the sewage or other organic matter in water into fish, if the fish can be caught and sold you can make a profit. This is a good ‘waste to wealth’ solution
Innopack++ is a biological purification technique with attached growth on an advanced carrier.Angelo de Mul – founder PureBlueThis compact container can purify wastewater into fresh water at businesses, refugee camps, cruise ships, festivals and more.The well-organized cooperation of bacteria in this system results in a higher treatment efficiency than for a standard activated sludge system. And the remaining compact sludge supplies bio gas.
BSP technology only use CO2 and produces O2 and microalgae biomass used as organic fertilizer
Bio-Solar Purification Laurent Sohier We propose a new technology to turn wastewater into usable fresh water. Bio-Solar Purification is based on the combination of sun on photosynthetic microflora in tubular photoreactor. Technology and reactors are ready to market. BSP replaces secondary, tertiary and finishing treatment removing all dissolved compounds and hazardous bacteria from water.
BSP technology only use CO2 and produces O2 and microalgae biomass used as organic fertilizer for agriculture. 100% of wastewater is recovered without evaporation or recontamination.
Solar energy purifies water
Another, small sized purification concept, driven by solar power, comes from a start up in the Netherlands.
The vision of this improved solar solution can be summarized as:
less condense on glass cover
more temperature difference
water is preheated reducing the evaporation time
continuous water flow
maintains simplicity of production, materials and design
The unit has the capacity to treat and condition approx. 250,000 liters per day
A very compact unit that “disinfects” any water source Peter Gamble – BEST Solutions Pty Ltd We have a very compact unit that “disinfects” any water source to reach a high potable water quality. It does not rely on adding chemical sanitizes such as chlorine etc. The unit has demonstrated the ability to kill bacteria, viruses up to 7 log, pathogens etc in a wide range of water sources. The unit has the capacity to treat and condition approx. 250,000 liters per day. It can be switched “on and off” according to demand, requires very little maintenance and can be placed in a shipping container. This is a low capital cost item.
Off grid community hand pump
Pedal pumps in stationary shaded locations Gordon Allen – Integrated Telematics Solutions Ltd. My idea is pedal pumps in stationary shaded locations along the way to/from the water village with a PE line having pumps at various points along the way. Each pump station would pay the pedaler by dispensing raw water out into his or her bucket as a ratio of what was pumped by that person. The balance would go to the village where a trade system could be done. (have details). At each pump station a filter could used to with pressure dispense drinking water. Less would come out at the filtered port than the raw port, but pedal as you chose, raw or more pedaling for treated. The stations along the way would fill up with people not wanting to walk all the way they have been used to walking, so the incentive to pedal is to not have to walk. Sitting in shade pedaling better than walking.
The balance chosen to discharge at pedal point is a factor adjustable by the system designer. PE pipes can be either buried by trench or covered with dirt / rock.
Reaction from Greg Chick – LEED AP. DIY Plumbingadvice I thought of a concept years ago on a way to get water from a source such as a well or river and transfer it to a village. This would fit to a location where the peoples now use buckets and walk/carry.
As well as move water this idea would be a village concept where what the walker would do to get water would in part share some with the village in both filtered water and raw water.
The life saver bottle – for save, sterile drinking water
Look at the brown and dirty water. And how LifeFilta is transforming this into fresh drinking water!
An engineered aquifer Aaron Mandell – WaterFX
WaterFX’s solution comes in the unlikely shape of a vast bank of parabolic mirrors and an advanced “multi-effect” evaporating unit. The Aqua4 system offers a renewable method of desalinating briny water.
Unlike conventional desalination, which uses a high-pressure reverse osmosis system – that forces salt and other solids through a membrane – WaterFX cleans through use of a 400-kilowatt solar “trough” – hence the mirrors. This concentrated solar still collects the sun’s energy, which heats a pipe containing natural oil, providing heat for the subsequent distillation process.
“We wanted it to be highly modular and highly scalable so the same system is usable for very small applications all the way up to very large scale,” says Aaron Mandell, founder and chairman of WaterFX. The idea is piloted in the Californian district of Panoche.