Live Covid-19
United States 104,488,837
Cases: 104,488,837
Deaths: 1,136,313
Recovered: 101,575,749
Active: 1,776,775
India 44,683,454
Cases: 44,683,454
Deaths: 530,745
Recovered: 44,150,892
Active: 1,817
France 39,533,323
Cases: 39,533,323
Deaths: 164,286
Recovered: 39,288,720
Active: 80,317
Germany 37,822,577
Cases: 37,822,577
Deaths: 166,128
Recovered: 37,451,400
Active: 205,049
Brazil 36,868,946
Cases: 36,868,946
Deaths: 697,361
Recovered: 35,953,131
Active: 218,454
Japan 32,760,317
Cases: 32,760,317
Deaths: 69,601
Recovered: 21,608,715
Active: 11,082,001
South Korea 30,263,261
Cases: 30,263,261
Deaths: 33,614
Recovered: 29,894,362
Active: 335,285
Italy 25,488,166
Cases: 25,488,166
Deaths: 187,272
Recovered: 25,072,909
Active: 227,985
United Kingdom 24,293,752
Cases: 24,293,752
Deaths: 204,898
Recovered: 24,036,949
Active: 51,905
Russia 22,004,828
Cases: 22,004,828
Deaths: 395,319
Recovered: 21,384,884
Active: 224,625
Turkey 17,042,722
Cases: 17,042,722
Deaths: 101,492
Recovered:
Active: 16,941,230
Spain 13,740,531
Cases: 13,740,531
Deaths: 118,712
Recovered: 13,569,497
Active: 52,322
Vietnam 11,526,577
Cases: 11,526,577
Deaths: 43,186
Recovered: 10,614,591
Active: 868,800
Australia 11,312,904
Cases: 11,312,904
Deaths: 18,828
Recovered: 11,260,631
Active: 33,445
Argentina 10,037,135
Cases: 10,037,135
Deaths: 130,421
Recovered: 9,890,900
Active: 15,814
Taiwan 9,685,484
Cases: 9,685,484
Deaths: 16,750
Recovered: 9,228,369
Active: 440,365
Netherlands 8,583,669
Cases: 8,583,669
Deaths: 22,989
Recovered: 8,551,642
Active: 9,038
Iran 7,564,881
Cases: 7,564,881
Deaths: 144,764
Recovered: 7,337,869
Active: 82,248
Mexico 7,389,670
Cases: 7,389,670
Deaths: 332,475
Recovered: 6,626,983
Active: 430,212
Indonesia 6,731,304
Cases: 6,731,304
Deaths: 160,838
Recovered: 6,566,404
Active: 4,062
Poland 6,383,225
Cases: 6,383,225
Deaths: 118,748
Recovered: 5,335,940
Active: 928,537
Colombia 6,357,200
Cases: 6,357,200
Deaths: 142,544
Recovered: 6,181,431
Active: 33,225
Austria 5,803,370
Cases: 5,803,370
Deaths: 21,755
Recovered: 5,744,784
Active: 36,831
Greece 5,723,715
Cases: 5,723,715
Deaths: 35,822
Recovered: 5,672,479
Active: 15,414
Portugal 5,564,254
Cases: 5,564,254
Deaths: 26,033
Recovered: 5,534,306
Active: 3,915
Ukraine 5,373,104
Cases: 5,373,104
Deaths: 111,063
Recovered: 5,255,195
Active: 6,846
Chile 5,128,130
Cases: 5,128,130
Deaths: 63,895
Recovered: 5,059,720
Active: 4,515
Malaysia 5,037,995
Cases: 5,037,995
Deaths: 36,943
Recovered: 4,990,977
Active: 10,075
Israel 4,788,158
Cases: 4,788,158
Deaths: 12,203
Recovered: 4,770,957
Active: 4,998
North Korea 4,772,813
Cases: 4,772,813
Deaths: 74
Recovered: 4,772,739
Active: 0

Biogas Production from Co-Digestion of a Cellulosic Feedstock and Piggery Manure

Biogas Production from Co-Digestion of a Cellulosic Feedstock and Piggery Manure

ABSTRACT

Nigeria has energy crisis, hence, there is urgent need to diversify the country’s energy resources towards the renewable alternatives for economic and social transformation. Biogas generated from the anaerobic digestion of local biomass resources, will increase national energy security, reduce dependence on fossil fuels and as well mitigate the environmental and ecological impacts of the organic wastes polluting our environment. The methane-producing potentials of rice husk co-digested with piggery manure and also using them as single substrate each under anaerobic condition at 35-40oC were studied. The results of the molecular identification of the microorganisms used for the studies based on 16S rRNA gene sequences and biochemical characterization showed that Bacillus, Cellulomonas and Pseudomonas species were the dominant bacterial group while the methanogenic archae were Methanosarcina and Methanobrevibacter species. The result of the proximate composition of rice husk showed that the volatile solids, Carbon, nitrogen, ash content and carbon-nitrogen ratio were 68.5%, 42.5%, 0.84%, 19.20% and 51:1 respectively. Five hundred (500) gram of rice husk was pretreated by steaming at 120oC for 30 minutes, dried at 80oC and ground into powder with a disc mill prior to anaerobic digestion. The result of co-digestion of rice husk with piggery manure at 50% ratio showed that the methane yield was 30.50 cm3/g VS at hydraulic retention time of 35 days while the methane yield using rice husk and piggery manure as single substrate each were 18.4 cm3/g VS and 24.4 cm3g VS at hydraulic retention time of 45 and 38 days respectively. The results of the studies have shown that co-digestion of rice husk and piggery manure has higher biogas yield than using them as single substrates. The one-way analysis of variance of biogas yield results showed that there was significant difference between the biogas yield obtained from co-digestion and that obtained from using both substrates as single substrates at 95% confidence level.

Keywords: Biogas Production, Co-digestion, Rice husk, Piggery manure, Methanogens

Authorship
Aniaku, Vincent Oluchukwu

Download Full PDF

Categories: