What is the Minimum Water Discharge for Wastewater Treatment at Home?

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I am building a model home with self sustained practice on water and waste management.

My house does not have a big consumption of water all the domestic needs, but still, I wanted to set up a wastewater treatment of water from washing clothes & vessels and bathing.

Suggest a pick and place water treatment setup if available.

What is the minimum water discharge required to set up a small treatment?

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8 Answers

  1. It depends on number of persons in home. The minimum water consumption for water is 90 l per person per day. Waste water generated will be 85% of water consumption. You are looking for treatment of gray water. You can use Zero Energy Natural Treatment Plant which is based on Root Zone System

    Rajendrakumar V Saraf

    sarafrv@virajenvirozing.com

    1 Comment

  3. French English

    Bonjour 

    En fait il ne s'agit pas de faire une évaluation du débit d'eau consommée à traiter.

    Il s'agit surtout de voir si ce débit d'eau consommée est propre à un traitement biologique.

    Ensuite si c'est le cas il faut toujours prévoir un volume detraitement d'épuration évolutif. A ce jour ce volume est à minima, mais demain la situation peut changer et ce minima sera insuffisant. 

    Donc prévoir toujours pour un volume de traitement jusqu'à 6 personnes au moins.

    Ensuite ce qui aura de l'importance c'est ce que vous allez faire du liquide en sortie.

    Si vous arrosez votre jardin d'agrément, votre liquide en sortie ne sera pas perdu. 

    Mais si vous arrosez votre jardin potager ce liquide deviendra productif.

    Il faut donc prévoir un volume minimum pour une maison d'habitation de 4 à 6m3 environ.

    En assainissement biologique ce volume reste permanent dans le procédé. Sort du procédé quand il est plein que le volume qui vient d'y entrer suivant le  principe des vases communiquant.

    English 

    Hello in fact it is not a question of making an assessment of the water flow consumed to be treated.

    The most important thing is to see if this flow of water consumed is specific to biological treatment.

    Then if this is the case it is always necessary to plan a volume of evolutionary purification. To this day this volume is at a minimum, but tomorrow the situation can change and this minimum will be insufficient. 

    So always plan for a volume of treatment up to 6 people at least.

    Then what will matter is what you're going to do with the cash out.

    If you water your pleasure garden, your liquid will not be lost. 

    But if you water your vegetable garden This liquid will become productive.

    It is therefore necessary to provide a minimum volume for a dwelling house of approximately 6m3.

    In biological sanitation this volume remains permanent in the process. Comes out of the process when it is full that the volume that just entered it following the principle of communicating vases.

     

      

    1 Comment

  4. Domestic wastewater is derived from bathrooms, kitchens, laundries and toilets. It includes human waste (containing pathogens), paper, soap, detergent residues and food scraps suspended in around 150 litres of wastewater daily for each person in a household. The water discharge is equal to your water consumption minus the volume used for watering the grass. This is how the sewage fee is calculated. Reducing the amount is done by reducing your water consumption or using the lightly contaminated water in your garden. Having a shower instead of having a bath reduces your consumption. Also, water saving washing machines, dishwashers, and toilets are available. You can use your bath waste to water the grass, especially if you use proper cleaning products (the same for hand washed dishes). There are toilets able to separate the solid and compost it; this can also reduce your wastewater volume. Collecting rain and using for all nondrinking or noncooking applications helps a lot as well.

    People's habits are different, but the wastewater is about 3-15 m3/month/person.

     

    1 Comment

  5. Hi Thanikachalamurthi Aruchamy

    As to answer your question, there is no minimum water flow. Only the kind and size of treatment will be different.

    For small flow rates and pollution loads, one can use a zero energy, gravity flow water plant root system (floating or fixed) after a fine screen and settling tank. If the soluble organic load would be higher, then fine bubble aeration shall be added.

  6. You can use Anaerobic Bioreactor followed by Zero Energy Natural Treatment Process (ZENT). The waste generation will be around 100 to 150 L/person/day.

    Rajendrakumar V Saraf

    Viraj Envirozing India Pvt. Ltd. Pune (India)

    2 Comments

    1. Just a question, I stumbeled over this post "by accident". Isn't anaerobic digestion producing Methane, a strong greenhouse gas?  Then it would not be a very eco-friendly technology. 

    2. Thanks Rajendrakumar Saraf .

      Is anybody down South [Coimbatore, TN] is setting up in effective cost ?

      Please guide me.

       

      Regards

      Murthi

      2 Comment replies

      2. I know Coimbatore. Last time I Came to deliver a lecture in National Seminar on Smart Water held in PSG College of Technology organized by Indian Water Works Association Coimbatore Centre. I can help you with further details please contact me on 9822186763 or write on sarafrv@virajenvirozing.com

  7. I agree with Daniel. Compost toilets are gaining popularity. Money is always tight. But when financially able purchase an RNA microbe for the system. It will eliminate all odor and breakdown all biosolids. Take a sample to your local water test facility. They will find it is now potable water. Users choice of course. Next is the bio generator. During the breakdown process loose electrons are floating around. The collector will change it into electricity for any use. Step up or step down transformers may be required for your country.  

    1 Comment

    1. Guy McGowen - Thanks for the options.

      My question is more about to understand the minimum requirement [of waste water] to build the system.

      I have the septic tank as soak pit.

      1 Comment reply

      1. New information, great! If you wish an uninterrupted source of potable water you may want to install a 2nd septic tank. When it is full treat it with Archaea and depending on the density temp and ph it will be cleaned in about 30 days. All the while tank #2 will be in use until it is full repeat, etc.  A rule of thumb is the waste in the water should not be more than 6% by volume.  In order to clarify this on a case by case basis have it tested by water engineers or purchase some electronic device that measures density or viscosity. For difficult bio waste you may want to add Hydrogen peroxide. H2O2. Most tanks become anaerobic. No O2 no H2O.  Their is no exact answer for your question. Just rule of thumb and adjust to your exact needs. Do remember to record your data. Share with a neighbor.

  8. Zero can easily be achieved (or close)  with the right system. Discharge where? Into a bio-filter for use on the landscape for irrigation?  With a compost toilet, and grey water system there is no waste.  Keep it clean and is not waste.

    1 Comment