Live Covid-19
United States 93,910,150
Cases: 93,910,150
Deaths: 1,058,738
Recovered: 89,039,885
Active: 3,811,527
India 44,161,899
Cases: 44,161,899
Deaths: 526,730
Recovered: 43,499,659
Active: 135,510
France 34,079,658
Cases: 34,079,658
Deaths: 152,711
Recovered: 33,015,897
Active: 911,050
Brazil 34,018,371
Cases: 34,018,371
Deaths: 680,051
Recovered: 32,731,706
Active: 606,614
Germany 31,228,314
Cases: 31,228,314
Deaths: 144,858
Recovered: 29,622,900
Active: 1,460,556
United Kingdom 23,368,899
Cases: 23,368,899
Deaths: 185,052
Recovered: 22,883,651
Active: 300,196
Italy 21,325,402
Cases: 21,325,402
Deaths: 173,249
Recovered: 20,097,986
Active: 1,054,167
South Korea 20,544,420
Cases: 20,544,420
Deaths: 25,292
Recovered: 18,983,817
Active: 1,535,311
Russia 18,730,561
Cases: 18,730,561
Deaths: 382,786
Recovered: 18,048,076
Active: 299,699
Turkey 16,295,817
Cases: 16,295,817
Deaths: 99,678
Recovered: 15,875,121
Active: 321,018
Japan 14,248,541
Cases: 14,248,541
Deaths: 33,663
Recovered: 12,156,152
Active: 2,058,726
Spain 13,266,184
Cases: 13,266,184
Deaths: 111,094
Recovered: 12,760,955
Active: 394,135
Vietnam 11,349,223
Cases: 11,349,223
Deaths: 43,094
Recovered: 9,982,345
Active: 1,323,784
Australia 9,658,112
Cases: 9,658,112
Deaths: 12,335
Recovered: 9,362,715
Active: 283,062
Argentina 9,560,307
Cases: 9,560,307
Deaths: 129,369
Recovered: 9,330,792
Active: 100,146
Netherlands 8,354,641
Cases: 8,354,641
Deaths: 22,528
Recovered: 8,214,723
Active: 117,390
Iran 7,443,801
Cases: 7,443,801
Deaths: 142,515
Recovered: 7,112,890
Active: 188,396
Mexico 6,857,470
Cases: 6,857,470
Deaths: 328,320
Recovered: 6,034,876
Active: 494,274
Colombia 6,278,998
Cases: 6,278,998
Deaths: 141,075
Recovered: 6,096,946
Active: 40,977
Indonesia 6,249,403
Cases: 6,249,403
Deaths: 157,113
Recovered: 6,042,657
Active: 49,633
Poland 6,094,868
Cases: 6,094,868
Deaths: 116,660
Recovered: 5,335,873
Active: 642,335
Portugal 5,359,624
Cases: 5,359,624
Deaths: 24,664
Recovered: 5,228,001
Active: 106,959
Ukraine 5,026,496
Cases: 5,026,496
Deaths: 108,727
Recovered: 4,912,069
Active: 5,700
Austria 4,791,014
Cases: 4,791,014
Deaths: 19,200
Recovered: 4,689,678
Active: 82,136
North Korea 4,772,813
Cases: 4,772,813
Deaths: 74
Recovered: 4,772,739
Active: 0
Taiwan 4,754,268
Cases: 4,754,268
Deaths: 9,255
Recovered: 4,300,651
Active: 444,362
Malaysia 4,708,552
Cases: 4,708,552
Deaths: 36,026
Recovered: 4,626,756
Active: 45,770
Thailand 4,607,451
Cases: 4,607,451
Deaths: 31,633
Recovered: 4,554,502
Active: 21,316
Israel 4,598,476
Cases: 4,598,476
Deaths: 11,433
Recovered: 4,550,603
Active: 36,440
Greece 4,474,616
Cases: 4,474,616
Deaths: 31,377
Recovered: 4,353,814
Active: 89,425

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

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