Greywater Reuse for Irrigation Purposes

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Dear all,

In our project area, we are generating 35 MLD greywater daily.

What is the best technology available to treat greywater and reuse for irrigation purposes?

I would like to know the feasibility of these technologies, as well as economical details. If someone has reused greywater in practical situation please share your case studies and treatment details.

 

Thank you

Kevil

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26 Answers

  1. To remove small solid particle you can look into continuous sand filtration:
    http://en.paques.nl/products/other/astrasand

    For highly purification you can look into membrane technology like MBR. Grudfoss has aslos developed a system: http://www.grundfos.com/about-us/news-and-press/news/turning-domesticwastewaterintoirrigationwater.html

    https://stateofgreen.com/files/download/121

     

  2. Hello , As you see by my picture here on the side I am sitting with one of my old friends, who is a chief in Ghana, where I live and work almost half of each year.  In my companies in the states we have developed two technologies that deal with your problem.  The first and most economical is Electro-coagulation, which is a technology that operates off of a simple 110 volt electric system.  Go to www.eco-web.com  then Editorials tab and finally Authors tab and go to the 9th to the 12th papers and you can read about it.  Also on that same site is a white paper on our technology called the Plasma Incubator Reactor.  It is more expensive but it can handle the entire sewage output of a small city in Africa, to read about it go to www.abescousin1.com  or email me a gerrybeagles@aol.com  and my US phone is 916-877-1553.

  3. It depends on the standards that must be met. I was on a team who designed a simple greywater filtration system to meet the NJDEP standards for both irrigation and evaporation towers. I sent you a connection request so we can talk in more detail.

  4. Tout dépend de l'origine de production des eaux grises et ce qu'elles contiennent comme pollution.

    Soit elles contiennent que des éléments "biologique" et alors un procédé de traitement biologique permettra de les épurer d'une façon convenable

    Soit elles contiennent des pollutions chimiques et alors il n'est pas question de recycler ces eaux grises.

    En me rejoigant sur ma messagerie :lyseconcept@gmail.com je fournis toute la documentation sur le procédé "Fosse Biologique"lyseconcept qui recycle immédiatement toutes les eaux usées ayant gardé toute leur caractéristique Biologique d'origine.

    Everything depends on the original production of gray water and containing as pollution.

    Either they contain only "organic" elements and then a biological treatment process will purify them in a suitable manner

    Either they contain chemical pollution and so there is no question of these greywater recycling.

    In rejoigant on my email: lyseconcept@gmail.com I provide all the documentation on the process "Organic Fosse" lyseconcept immediately that recycles all wastewater having kept all their Biological characteristic of origin.

    Jean Marius

  5. Hi Kevil

    Easy to know the answer if you give more details essentially whether or not this water is mixed with sewage or not and the details of chemical and biological analysis. The process could be as simple as ph adjustment snd filtration or sophisticated for the extent it needs a hill of money

  6. Hi Kevil, I suggest you take a look at our web site we have a unique and natural solution that is economical, easy to apply and environmentally friendly. We are starting our entry in to the Indian market shortly. If you are interested I will provide you with our sales literture and we can discuss a possible test. You can reach me at mark.cohen@soleco-technology.com.

    Answered on by

  7. Hello, To get the best return of usable water from grey water, you should employ Tertiary Level wastewater technology with all the appropriate enhancement add-ons. If you set up the system correctly; you should have, at minimum, 95% clean finished product to re-use as needed ( not quite the best for potable drinking water) for all secondary water uses required.

  9. This huge quantum of Grey water is a valuable resource which must be utilized to generate livlihood . The most economically and technical viabale system of wastewater treatment can be through Hybrid constructed wetlands which more close to socio-economic environmrnts of developing countries. HCW is sustainable and can also be designed on value addition interventions for livilyhood geration , enhancing bio-diversity and imroving the local ecosystem. Thereafter , the treated water should be used for irrigation purposes which is save .

  10. You can use extended aeration lagoon process with opting for blowes to use solar energy . Secondly instead of direct air in to lagoon use Diffusers it will give better efficiency . After extended aeration you can also opt for physio chemical treatment for more clarity of water . This treated water after proper disinfection is fit for all reusable purposes.

  12. Dear Kevil,

    Le me share with you a project documentary that may be of help. It is self expalanatory.
    https://www.youtube.com/watch?v=3nH6qid30kQ

    As of now the second pond (settling tanks) was contrcuted where water hyacinth is applied for nutrient uptake.

    Hope this woudl be of help.

    Hovhannes

    1 Comment

    1. I appreciate sharing the project information. First initiative is always most important, as an example. Rest follows.

  14. Kevil,

    We have a very interesting technology to offer on MAST (Microbe Algae Sewage Treatment). Though the reference is sewage it is used in treating any type of wastewater. The problem you have with grey water is high levels of Phosphates and no presence of Nitrates. Some nitrate addition will help.

    Our MAST Technology achieves several aspects including BOD / COD / TSS reduction. Additionally the MAST is a carbon negative process, which means it pulls more carbon out of the air than it throws out. Secondly there is no need for external power to provide aeration. This happens with the presence of microalgae. Microalgae give out oxygen and the microbes take this up to grow. The microbes put out carbon dioxide that the microalgae need to grow. This is therefore a symbiotic relationship. This technology only requires 3 resources. Firstly nutrients that is provided by the greywater, secondly carbon dioxide that is available from the microbes as well as the open air and the third requirement is sunlight. This is available in ample quantity. The MAST Technology wastewater treatment plant produces biomass, which forms a revenue source for you.

    Therefore firstly there is a savings in the form of very low energy requirements as no aerators need to be operated. Secondly the biomass produced from the operations provide a source of revenue generation. Thirdly as the project is carbon negative you can apply for carbon credits and sell them internationally. There is going to be a huge market after the Paris Climate Negotiations on carbon credit trading.

    If you require more information on the way forward you can send me an email at advenvtech@gmail.com.

    Best Rgds.

    Chetan Shukla

    Director

    Clean Env. Tech. Pvt. Ltd.

    1 Comment

  15. Dear Kevil Vavaiya

    Agricultural production provides income, employment and food at affordable prices as well as raw material for the processing industry and foreign exchange from exports. Creating a sustainable agricultural development path means improving the quality of life in rural areas, ensuring enough food for present and future generations and generating sufficient income for farmers.

    Supporting sustainable agricultural development also involves ensuring and maintaining productive capacity for the future and increasing productivity without damaging the environment or jeopardising natural resources. In addition, it requires respect for and recognition of local knowledge and local management of natural resources, and efforts to promote the capabilities of current generations without compromising the prospects of future ones.

    Consequently, economic and environmental sustainability, adequate farmer incomes, productive capacity for the future, improved food security and social sustainability are important elements of developing countries’ agricultural development.

    Please find attached herewith treatment process & reuse of Grey wate.

    Regards,

    Prem baboo

  16. Hi, Kevil

    You can use DEWATS for very economical solution. zero energy plant can be workout for agricultural reuse of water. contact us with further detail on jgoyani@yahoo.com


  17. Good answers you have recieved, i think the treatment process should got from Oil traps follwed by filtration and disinfection, this could be the most economical and viable treatment.


  19. Hi Kevil

    We have developed a filtration system for treating this water and bringing it back to Class A water. I am thinking the best way would be to email information to you if you can send me your email address please

    Thanks

    Doug

    1 Comment

  20. In most cases, no treatment is required. Usually, the graywater is too dilute to injure landscape plants. If the water is to me used for crops that is a different matter, and, depending on what's in the graywater, there may be a health issue.

    If drip irrigation is to be used, some filtration may be required to prevent clogging.

  21. Hi Kevil

    We have an unqiue technology to grow Diatom Algae to treat sewage and grey water. This is invented in india. You just require a open tank or pond to treat the wastewater and the treated water can be used for irrigation. There will be no foul odor from the tank or pond, since Diatoms produce Oxygen.

    If you have space for a big pond, you can grow fish in the pond. This is an excellent waste to wealth solution.

    Contact me directly for details.


  22. In the USA it is common practice to filter grey water to 120 microns and use it with landscape turf or trees with subsurface drip irrigation. This is low cost combined with low risk. To read about this technolgy please go to: http://geoflow.com/research_w.html . If you are interested I will introduce you to a supplier in India.

    Rodney

  23. Many yeaars ago I lived with the Gratt familyin a small village in the Black Forest of Germany. Herr Gratt was the mayor of the village. My room was above the stables and next to the Rauchzimmer (the room where all of the meats were smoked). I looked out of my window early one morning and the Herr Burgermeister was leading a round 100 gallon tank drawn by his horse up to his fields. On inquiry at dinner, I asked what hehad been doing. He had been taking the liquid waste from the house to irrigate his fields. It was released through a ball valve where it fell onto a semi-circular spreader. That was it. He had done this his entire life and his ancestors for hundreds of years is my guess.

  24. Run a full Chemical analysis first including BOD,COD and TSS. Without it you can't get the right answer for the right treatment. As the concentration of the grey-water varies during the day get more than one sample at different times.

    1 Comment

    1. Also gather flow rates throughout the day so you can determine your mass flow and peak flow. Greywater contamination and flow tends to vary throughout the day and you will need this to size your treatment system for upstream peak flow or to design a surge tank (unless you choose to send that greywater to waste during these periods).

  25. We have non biological treatment for sewage - grey water. The output water will be colourless and odourless with COD BOD within discharge norms. Best part of the system is that it does not require large open tanks for aeration and there is no foul odour spread from STP. The system being non biological - it always work unlike microbial system which de5 pends on the mood of microbes. Most important: Operating cost of our XERODROP STP is 10% lsess as compared to any microbial system. Farmer who is taking up the treated water will never complain about foul smell that is guaranteed! Please write us to info@aeolusbioenergy.com or aeolus.bioenergy@gmail.com for more details. Niraj Mithani