What are the treatment stages required to treat the LWW to meet the requirement for gardening only?
What are the major challenges , while treating the LWW?
Thank you so much for your detail explanation...
For your kind information:-
My samples are from dormitory (female hostel in the University).
My guess would be that you should be able to use the laundry water directly for gardening purpose. There are no toxic compounds expected, except for some detergents (which if not too high concentration would be broken down in the soil), while also organic matter will be quite low. P and some N might be welcome additions for plant growth. If detergent concentration is high you might need to dilute with fresh water when watering the plants. Detergent ingredients include a.o. surfactants like alkylbenzene sulfonic acid, builders which have sodium nitrilotriacetate, sodium triphosphate, and zeolite, and bleach-active compounds. Good luck with your trials.
thank you!
could you elaborate little more, how it would be broken down in the soil ????
what is your advice about the presence of amount of dye? some amount may dissolve.
regards!
Suraj Bhagat
Hi, Mr. Bhagat,
Information about the component LAS (linear alkylbenzene sulphonate) that is present as cleaning and foaming agent in all household detergents, but also biochemical decomposition pathways are detailed in the attached document. You will see that there are some environmental risks since not all compounds are biodegradable but dilution could be a solution. Also, too much Nitrogen and Phosphorus (coming from nitrit and phosphate in laungry waters) discharged on a limited surface has a negative impact in terms of eutrophication. You can find details about alkylbenzene sulphonates break down (via the intermediates sulpho phenyl carboxylates SPSs that is tens times less harmful than LAS) and also about the parameters that are considered in assessing the laundry waters quality.
I hope this document will be helpful for your project.
Dear Suraj,
Dr. Farid Benyahia has nicely described the characteristics of waters from Commercial laundry (traditional coin operated) and Industrial Laundry (services to hotels, large companies, etc..).
The following articles may also be useful.
Article Investigation on reuse potential of laundry water for househ...
Best wishes
thank you Dear Dr Asit ,
First attached Article is new for me...... thank you
what is your advice about the presence of amount of dye? some amount may dissolve.
regards!
thank you Dr BP Naveen!
what is your advice about the presence of amount of dye? some amount may dissolve.
I think there are two key points in laundry water. One is detergent, the other is microorganism. It needs adsorption and disinfection. Adsorption would reduce detergents, organic matters such as personal care products, and dyes presented in the wastewater.
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