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 on the farm since weed seeds in the raw state get destroyed during the fermentation process in the digester.
Enhances activity of beneficial microbes in soil.

Nutrients Present in Bioslurry

Uses

Being high-quality organic manure it can be used to increase agricultural product yield.
Decreases the use of costly chemical fertilizers hence saving income.
Improves water holding capacity, stabilizes humid content, and prevents the leaching of nutrients from the soil.
Can be used as feeding material for fish.
Can be used as a bio-chemical pesticide, where chemical pesticides can be mixed with bio-slurry in 15-20%. This biochemical pesticide controls different kinds of pests & insects harmful to 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 the field using a bucket or can be discharged through an irrigation canal.
Before using should be diluted with water at a ratio of 1:1.5-2 because due to high concentrations of ammonia & phosphorus cause a burning effect on tender plant parts.

Dried Form

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

Composted Form

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

Nepal Biogas Promotion Association (NBPA)
Central Office Kathmandu
Santinagar, Gyankunja Marga Ward No:31 Home No. 131/23 Near to Tinkune Pool.
P.O. Box No: 10074
Kathmandu, Nepal

Tel. +977 (01)-4622113 or M: 9851321496
Email: nepalbiogas@gmail.com