Meet Inspiring Speakers and Experts at our 3000+ Global Conference Series Events with over 1000+ Conferences, 1000+ Symposiums
and 1000+ Workshops on Medical, Pharma, Engineering, Science, Technology and Business.

Explore and learn more about Conference Series : World's leading Event Organizer

Back

Kefel Wagaw

Kefel Wagaw

Bahir Dar University, Ethiopia

Title: Comparative study on the nutrient concentration and productivity of bio-slurry before and after treatment with chemical fertilizer

Biography

Biography: Kefel Wagaw

Abstract

Abstract: In biogas plant, there are mainly two products: methane gas which is use for different purposes like cooking, lighting and slurry which can be used as organic fertilizer. The main target of this study was characterizing the slurry by measuring the relative amount of macro and micro nutrients like Nitrogen, Phosphorus, Potassium, Calcium, Magnesium, and Manganese by using standard methods. And comparative study on the productivity of organic fertilizer at different treatments steps with commercial fertilizer on selected crops. Potassium and Calcium values increase when it was composted.  This is because of that decomposed vegetables are sources of both Ca and K during composting while Magnesium and Manganese values decrease when the slurry converts to compost. Both compost and commercial fertilizer have the same productivity for onion cultivation .Compost, gives the highest incremental yield of chills (even higher than that of chemical fertilizer).From productivity test 1.5kg/m2 onions and 3.75kg/m2 chills was produced using biogas-slurry compost.

Key words: biogas slurry, compare, compost, macro and micro contents.

Table: elemental composition of biogas feed stock at different treatment stapes

Sample

K[mg/l]

Ca[mg/l]

Mg [mg/l]

P [mg/l]

N2 (%)

Ma [mg/l]

Manure

66.92

0.84

5.11

0.22

2.10

56.50

Slurry

107.56

0.69

2.3

0.20

2.52

46.16

Compost

146.11

2.22

4.91

0.33

1.68

55.35
Nitrogen decrease (33%) during composting this is due to volatilization of N2 in the form of NH3 and NH4.

References:

[1]. Chawla O.P., 1984. Manurial Aspects.' Advances in Biogas Technology. New Delhi: ICAR.

[2]. Acharya, C.N., 1961. Preparation of Fuel Gas and Manure by Anaerobic Fermentation of Organic

Materials. New Delhi: Indian Agriculture Research institute.

[3]. Acharya, C.N., 1953.   'Cow Dung Gas Plants.'   Indian Fmg. N.S. 2 (9): 16-18; Acharya, C.N., 1952.  

'Organic Manures.' I.C.A.R. Res. Rev. Ser. Bull. 2. New Delhi.

[4]. Dhussa, A.K., 1985. ' Biogas Plant Effluent Handling and Utilisation.' in Changing Villages Vol.7,

No.l.

[5]. Kanthaswamy, V., 1993. ' Effect of Bio-Digested Slurry in Rice.' In Biogas Slurry Utilsation. New Deihi: CORT.

[6]. Riggle, David, 1997.   ' Anaerobic Digestion Gets New Life on Farms/ In BioCycle, January, 1997.

[7]. Rosenberg, G. 1952 (a). Methane Production from Farm Wastes as Source of Tractor Fuel. Journal of Min. Agric. (England) 58: 487-94.

[8]. Dohne, E., 1990. Optimal Bioslurry Fertilisation in West Germany. In Biogas Forum, Vol. 1 Special, 1990

[9]. Sharma, U.P., 1981. 'Complete Recycling of Cattle-Shed Wastes Through Biogas Plant.' Seminar

Com Workshop on Janata Biogas Technology and Fodder Production  Kamal: NARI.

[10]. MoARD, 2010. Ethiopia’s Agricultural Sector Policy and Investment Framework (PIF) draft office. Addis Ababa, Ethiopia.