Abstract
Cultivation of some top vegetables was made by irrigation with distillery spent wash of different proportions. The spent wash i.e., primary treated spent wash (PTSW), 50% and 33% spent wash were analyzed for its plant nutrients such as nitrogen, phosphorous, potassium and other physical and chemical parameters. Experimental soil was tested for its chemical and physical parameters. Top vegetables seeds (Namadhari and Mayhco) were sowed in the prepared land and irrigated with raw water (RW), 50% and 33% spent wash. The impact of spent wash on the yields of vegetables at their maturity periods was investigated.
Highlights
IntroductionMolasses (one of the important byproducts of sugar industry) is the chief source for the production of alcohol in distilleries by fermentation method
Molasses is the chief source for the production of alcohol in distilleries by fermentation method
About 40 billion liters of waste water annually discharged in distilleries, known as raw spent wash (RSW), which is characterized by high biological oxygen demand (BOD: 5000-8000mg/l) and chemical oxygen demand (COD: 2500030000mg/l) (Joshi,1994), ugly color and bad smell
Summary
Molasses (one of the important byproducts of sugar industry) is the chief source for the production of alcohol in distilleries by fermentation method. About 40 billion liters of waste water annually discharged in distilleries, known as raw spent wash (RSW), which is characterized by high biological oxygen demand (BOD: 5000-8000mg/l) and chemical oxygen demand (COD: 2500030000mg/l) (Joshi,1994) , ugly color and bad smell. Discharge of raw spent wash into open land or near by water bodies resulting in a number of environmental, water and soil pollution including threat to plant and animal lives. The RSW is highly acidic and contains oxidisable organic matter with very high BOD and COD (Patil, 1987). Spent wash contains highest content of organic nitrogen and nutrients (Ramadurai and Gearard, 1994). By installing biomethenation plant in distilleries, reduces the oxygen demand of RSW, the resulting spent wash is called primary treated spent wash (PTSW) and primary treatment to RSW increases the nitrogen (N), potassium (K), and phosphorous (P) contents and decreases the calcium (Ca), magnesium (Mg), sodium (Na), chloride (Cl-), and sulphate (SO 2-)
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