We are running a WASH project which is suffering hugely due to lack of water supply.
I ask Water Network members for your advice on simple technological innovations to treat the contaminated water from the river source for urban needs, without having a river plant.
Which simple and affordable technologies can we implement to treat river water both for drinking and municipal use?
we can provide from india a fully automated plant to convert river water into pure drinking water @US $ 1250000 with training for your engineer in india +packing+shipping costs
we also have a low cost solution for water hycinth if it is there
Could you let me know what types of filtration you are using so far and what levels of contamination you are dealing with (sediment and clays, etc. as we have developed a simple, filtration material (ARI Material) that is designed to remove particles from water down to 63 Micron at over 30 L/s.
Maybe we can help in some way?
Kind Regards
Craig UST
Published
by Craig Rothleitner, Director at Urban Stormwater Technologies Pty Ltd
1 Comment
Dear Craig,
Thank you for your information.We are not doing any filtration yet.The Ngong River water treatment is something that I am thinking about to sustain our WASH Project with regard to water supply.The water is flowing although I do not know the impurities present.I am planning to have the water tested to ascertain the extent of contamination.During rainy season the water is absolutely clean although I suspect it can contain impurities.When it is not raining,the waters are blackish in colour.There are industrial effluents from industries and factories around Mukuru slums.
another way would be to filter the water with sand or cloth to make it clear, then use a disinfection pill to make it drinkable, however there might be dissolved contaminants that are harmful.
I understand this is a project for a rural area somewhere and you need very simple ways to make the water drinkable. How about trying distillation? you heat the water to a certain temperature until it starts evaporating, then the vapor will rise in the vessel and you can collect it and cool it at the top, this would be the simplest way possible.
Thank you for your information.The Ngong River is in an urban context and the water is contaminated with industrial effluents.It is blackish in colour but during rainy season the water are clean although I am not sure if there are contaminants.I am planning to do some water tests to ascertain the level of contamination.
@Abba Ahmed, We do not know ph and all these other elements that can be found in the water as we have not done any water test.However,I cannot take for granted any idea given by the professionals here even if it means marketing.
@Robert Remie,thank you for your input and the Blue Box 1800 UF seems like the kind of technology we would consider to treat our water like you said it is easy to deploy.
The river water is extremely black even though during rainy periods,the water is absolutely clean.However,when it is not raining,the river gets dirty due to industrial effluents from the nearby industries.
Thank you all for your valuable contributions towards solving our water problems.
we can offer you a 3 MLD drinking water purification plant from river water @ US $ 125000 + packing + shipping charges & teaching your engineer its operation here in india-for details send me your email address to om.pune@yahoo.in balbir singh-india - tel +91 9766594544
Electrocoagulation is a good technology for localised and decentralised water treatment,particularly with modern practice for the technology....u can have it in combo with other physico mechanical,and biochemical simple systems,depending on pollution
We are specialist in treating river water without any infrastructure modification with our cost effective "ABR" Technology. This will produce odorless effluent with low organic matter. We are treating "Mithi River" in Mumbai for last 7 years with very satisfactory results.
If you are interested to know details of our technology please send your e-mail address so I'll share details with you.
The most economical method is the treatment on the vortex-wave reactor. Minimal energy consumption will not exceed 0.6 kW/m3 of water after treatment is clear, technically feasible. Depending on the state of water in the river and drinking, because all the harmful fur of impurities and divalent salts oxidize and precipitate after the treatment. Less expensive and fastest cleaning I've ever seen. The production of pure water in real time. Processing speed - as much as you can to pump the pump. At the exit of the reactor ( don't be afraid of this word) - it's just the pipe) - is pure water. If you want to ensure that it will work come show.tumentsev@inbox.ru
First of all examine the input condition like pH,turbidity, color, smell, the bacteriologicalcontent.
With such data it would be much easier foranyone interested in helping inmy opinion to advice on the best treatment process that efficient and economically feasible.
River water is mainly contaminated by physical and biological impurities consist of Totals suspended solids, turbidity, bacteria, virus, algae etc. which need to remove before supply and distribution of river water for various uses.
River water treatment is the process of removing contaminants from flowing or stagnant river water which includes physio-chemical treatment of water with the combination of conventional and advance treatment process like
Coagulation, flocculation,
Clarification, settling,
Filtration
Granulated activated carbon filtration.
Disinfection of filter water
If COD/BOD more, then suggested for biological treatments.
This process produce an environmentally safe and pure water suitable for drinking and multiple uses in domestic, institution and industrial application.
This is a very reasonable approach, which has been recommended by other people in this thread, too.
You may also want to tell us, which volumes you need to treat per day at one location and how many of these systems you are planning to install.
Your overall approach may also depend on the distribution system you are planning to use. Not least cultural aspects and the region you are working at may influence your choices. These would be further informations needed for a sound advice.
I am sceptical of those recommendations which just tell you to buy their device without even bothering to ask what you really need.
Be also aware of the possibility to use different water sources and different levels of treatment for different purposes. You'll certainly need potable water quality for drinking, cooking and dish washing, i.e. a minimum of 10 l/(c.d), you could be satisfied with service water of lesser quality (bathing water) for hygiene, laundry or toilet flushing, if you consider the latter at all. This could be recycled water or rainwater, if you have enough rainfall, or any other source. Don't neglect the potential of UDDT toilets to both save water and produce a valuable fertiliser.
David.......you must use a couple of large settling tanks first, into those tanks you would add our 100% organic solution, SOLUTEK. Inlet to tanks needs to be filtered at about 60 to 100 microns. Once water has an average residency time of 7 days it will be relatively clean.....then there are several ways to go...either filter again at 3 to 4 microns and use UV sanitation of filter at .03 microns and it will be perfect to drink. It all depends on just how far you want to go. If you ony filter once and users can boil the water for 8 mins. it will be safe.
For any river water, for mass application of water treatment, Coagulation, flocculation, Settling/Clarification, Filtration and Sterilization unit processes are a MUST. The best read if I recommend you is "Surface Water Treatment for Communities in Developing Countries" by Schulz and Okun ( A WASH Project Product). The state of Maharashtra in India has constructed hundreds of "Simplified Plants" for capacities ranging from 0.5 to 10 mld. They consist of Cascade Aerator, Pebble bed/Mechanical flocculator, Tube Settlers with hopper bottom, Rapid Sand/Dual media filters without Rate Controllers and Chlorination by Bleaching Powder. The plants are found to be sustainable under the present socio-economic-techno environment in India.
Sand filtration and chlorination should work in most cases unless the river water has toxic chemical pollutants i.e., ammonia, heavy metals, pesticides and/or fertilisers. In the latter case, try rainwater harvesting. The capital costs of sand filtration + chlorination aren't astronomical. A lot depends on how you plan to distribute water as pipelines cost more than the treatment plants themselves. If you are distributing treated water you need a centralised facility but otherwise household or small community sized treatment systems using the same combination are possible at low cost.
My company- Lighthouse Utility Solutions, Inc. has developed a system that can reclaim ANY dirty water flow and produce distilled water- WHILE it is producing power.
I do not know what level of flow you desire, but am confident that we can provide a system that can meet your needs.
The system produces an output that is about 10% higher than the input, so it can easily "flush out" any solids from the incoming flow while maintaining "full" capacity.
I have to agree with Abba and Gunther. There is no single "technology" that is going to manage this for you. You need to first determine what the raw quality is and from that you can determine where you want, or need to be based on local regulations. Gunther lays it out quite clear. Surface sources are never easy as they are never consistent, micro pollutants, organics, pathogens, distribution systems, disinfection by products this all needs to be considered. It takes time and planning, which if done well in the end will produce the most cost effective solution.
Every little advice you get with the current question you posed will not suffice in my opinion. It could either be Marketers, marketing a product or a hypothetical answer. Having said that, however, there is need for you to at least provide some sort of information about the raw water quality you're planning to treat for instance the turbidity, color, smell, taste if possible, P.h. and perhaps the bacteriological content. With such data it would be much easier for anyone interested in helping in my opinion to advice on the best treatment process that efficient and economically feasible.