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BIOSLURRY


Introduction

After the completion of bio-gas plant, equal amount of cow dung and water is mixed and send to the digester though the inlet of the Bio-gas plant. Inside the Bio-gas plant decomposition of the mixture takes place to produce methane gas and the remaining portion of the mixture is send through the outlet of the Bio-gas plant which is known as Bioslurry. This viscous liquid contains 93% water and 7% percent dry matter (4.5% organic & 2.5 % inorganic). Bioslurry is a ready-made fertilizer containing every nutrient needed for the plant and can be directly used in fields to grow crops which is more effective in comparison to other fertilizers.


Characteristics
  • Odorless (Fully digested inside the digester).
  • Insects & flies not attracted.
  • Reduces (50%) growth of weeds in farm since weed seeds in raw state get destroyed during fermentation process in the digester.
  • Enhances activity of beneficial microbes in soil.

Nutrients Present In Bioslurry:

 Name of the Slurry
 Nitrogen

 Phosphorous Potassium
Fresh Slurry (Toilet not connected)
1.89

1.84
1.85
Fresh Slurry (Toilet connected)
2.12
 
1.27
1.42
Viscous Compost (Toilet not connected)1.65

1.19
0.61
Viscous Compost (Toilet connected)

1.76
0.89
0.52

Uses
  • Being high quality organic manure it can be used to increase agricultural product yield.
  • Decreases the use of costly chemical fertilizers hence saves the income.
  • Improves water holding capacity, stabilizes humid content, and prevents leaching of nutrients from soil.
  • Can be used as feeding material for fish.
  • Can be used as bio-chemical pesticide, where chemical pesticide can be mixed with bio-slurry in 15-20%. This bio-chemical pesticide controls different kinds of pest & insects harmful in agricultural production.
  • Soaking seeds in bio-slurry can induce seedling germination faster & resist diseases.
  • Can be used in earthworm production.
Utilization & forms of bio-slurry

Depending upon the requirement & comfortableness bio-slurry can be used in different forms. Nutritional content varies in different forms of bio-slurry.

Liquid form

  • Can be applied directly in field using a bucket or can be discharged through an irrigation canal.
  • Before using should be diluted with water at ratio of 1:1.5-2 because due to high concentration of ammonia & phosphorus cause burning effect on tender plant parts.

Limitations

  • Tedious to carry bio-slurry in liquid form.
  • Year round irrigation facility is not available to all farmers.
  • While in irrigation channel bio-slurry has tendency to settle so can't get uniformly distributed.
  • Loss of ammonia in wet slurry.

 Dried form

  • This is practiced as transportation of liquid slurry is difficult.
  • But nitrogen in form of ammonia is lost by volatization & nutritive value of slurry is diminished.
  • So, least efficient method of slurry application.

 Composted form

  • Best form to overcome drawbacks of using in liquid & dried form.
  • Should be taken to field only when necessary & used immediately to prevent nutrient loss.

Advantages

  • One part of slurry is sufficient to compost about 3-4 parts of dry plant material, result in increased volume of compost in the farm.
  • Dry materials of kitchen & farm waste can be properly utilized.
  • It can be used for algae production, fish rearing, mushroom production.