BIOGAS YIELD AND PRODUCTIVENESS OF SWINE MANURE FOR DIFFERENT REACTOR CONFIGURATIONS

Lins, Marcos A.; Steinmetz, Ricardo L. R.; Amaral, André C. do; Kunz, Airton

doi:10.1590/1809-4430-Eng.Agric.v40n6p664-673/2020

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Sumário

Scientific Paper, Energy Systems • Eng. agríc. (Online) 40 (6) • Nov-Dec 2020 • https://doi.org/10.1590/1809-4430-Eng.Agric.v40n6p664-673/2020 copy

BIOGAS YIELD AND PRODUCTIVENESS OF SWINE MANURE FOR DIFFERENT REACTOR CONFIGURATIONS

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT

The progression of the organic loading rate (OLR) up to a certain limit increases biogas production. The limit and operation range vary according to the configuration of the reactor and are associated with other variables that generate different results with respect to biogas yield (BY) and biogas productiveness (BP). The aim of this study was to investigate the effect of the OLR on the BY and BP from swine manure in continuous stirred tank reactors (CSTRs) and upflow anaerobic sludge blanket reactors (UASBs). In the assay with the CSTR, the best operational condition was at an OLR of 0.7 g_{VS add} L⁻¹ _reactor d⁻¹ and a hydraulic retention time (HRT) of 18 days. At this operational condition, 0.8 L_{N biogas} g_{VS add}⁻¹ of BY and 0.6 L_{N biogas} L⁻¹ _reactor d⁻¹ of BP were obtained. In the assay with the UASB, the best operational condition was at an OLR of 2.2 g_{VS add} L⁻¹ _reactor d⁻¹ and an HRT of two days, and 0.7 L_{N biogas} g_{vs add}⁻¹ of BY and 1.6 L_{N biogas} L⁻¹ _reactor d⁻¹ of BP were obtained. The results demonstrate the effects of OLR changes on the biogas production in the CSTR and UASB, avoiding the underutilization or overloading of such equipment and enabling collaboration in projects for power generation from biogas in swine farms.

KEYWORDS
Bioenergy; sustainability; swine farms

Sampling point	(g_TS L⁻¹)	(g_VS L⁻¹)	VS/TS ratio
A	29.8±7.5	21.4 ±6.0	0.72
B	10.1±3.6	6.2±2.5	0.61

OLR (g_{VS add} L⁻¹_reactor d⁻¹)	(g_VS L⁻¹)	HRT (d)
Phase I
1.0	15.0	15
1.0	19.0	19
1.0	20.0	20
1.0	23.6	24
Phase II
2.0	21.5	11
3.0	26.0	9
Phase III
1.0	18.3	18
1.9	15.0	15
0.7	13.0	18

OLR (g_{VS add.} L⁻¹_reactor d⁻¹)	(g_VS L⁻¹)	HRT (hours)	Ratio W:SM
Phase I
1.5	1.4	22	75:25
2.0	1.9	22	75:25
2.5	2.3	22	70:30
3.0	2.3	18	70:30
Phase II
0.5	1.7	75	60:40
0.7	2.3	75	40:60
0.9	2.7	75	20:80
1.4	4.3	75	0:100
1.6	4.3	66	0:100
2.2	4.3	48	0:100
2.9	4.3	36	0:100
8.4	8.4	24	0:100

OLR	HRT (d)	BP Min. – Max.	BY Min. – Max.	CH₄ (%)	CV (%) BP – BY
Phase I
1.0	15	0.1 – 0.4	0.1 – 0.4	39 ± 1.7	55.1
1.0	19	0.3 – 0.7	0.3 – 0.7	44 ± 2.2	19.3
1.0	20	0.3 – 0.6	0.3 – 0.6	49 ± 2.9	14.1
1.0	24	0.2 – 0.5	0.2 – 0.5	47 ± 4.4	16.2
Phase II
2.0	11	0.2 – 0.9	0.3 – 0.5	52. ± 4	20.4 – 12.3
3.0	9	0.3 – 1.1	0.1 – 0.3	48 ± 5.7	25.5 – 20.8
Phase III
1.0	18	0.2 – 0.6	0.2 – 0.6	49 ± 8.8	32.7
1.9	15	0.5 – 0.9	0.3 – 0.5	52 ± 9.7	14.1 – 16.2
0.7	18	0.5 – 0.7	0.7 – 1.0	53 ± 2.5	9.3 – 8.3

OLR	BP	BY	CH₄ (%)	*Dilution W:SM	HRT (hours)
Phase I
1.5	0.4 ± 0.2	0.3 ± 0.1	74 ± 2.6	75:25	22
2.0	0.9 ± 0.3	0.5 ± 0.2	74 ± 3.4	75:25	22
2.5	1.2 ± 0.2	0.5 ± 0.1	75 ± 2.7	70:30	22
3.0	1.2 ± 0.2	0.4 ± 0.1	75 ± 2.2	70:30	18
Phase II
0.5	1.3 ± 0.2	2.5 ± 0.4	68 ± 8.3	60:40	75
0.7	0.4 ± 0.1	0.6 ± 0.1	69 ± 4.1	40:60	75
0.9	1.0 ± 0.2	1.1 ± 0.3	69 ± 4.7	20:80	75
1.4	0.9 ± 0.1	0.6 ± 0.1	71 ± 3.9	0:100	75
1.6	1.3 ± 0.1	0.9 ± 0.1	73 ± 2.0	0:100	66
2.2	1.6 ± 0.3	0.7 ± 0.1	73 ± 2.0	0:100	48
2.9	1.6 ± 0.5	0.5 ± 0.2	75	0:100	36
8.4	1.9 ± 1.1	0.2 ± 0.1	68 ± 6.5	0:100	24

Paper	OLR	TS %	VS %	HRT (d)	BP	BY	CH₄ %
CSTR REACTOR
Present study	0.7	1.8	1.3	18	0.6	0.8	53
Duan et al., (2019)Duan N, Zhang D, Lin C, Zhang Y, Zhao L, Liu H, Liu Z (2019) Effect of organic loading rate on anaerobic digestion of pig manure: Methane production, mass flow, reactor scale and heating scenarios. Journal of Environmental Management 231:646-652. DOI: https://doi.org/10.1016/j.jenvman.2018.10.062 https://doi.org/10.1016/j.jenvman.2018.1...	1.9	5.0	4.2	22	1.1	0.6	72
Sun et al., (2019)Sun H, Ni P, Angelidaki I, Dong R, Wu S (2019) Exploring stability indicators for efficient monitoring of anaerobic digestion of pig manure under perturbations. Waste Management 91:139-146. DOI: https://doi.org/10.1016/j.wasman.2019.05.008 https://doi.org/10.1016/j.wasman.2019.05...	3.0	9.1	4.5	28	1.2	–	64
Kafle et al., (2012)Kafle GK, Sang HK, SH, Shin BS (2012) Anaerobic digestion treatment for the mixture chinese cabbage waste juice and swine manure. Journal of Biosystems Engineering 37:58-64. DOI: https://www.researchgate.net/deref/http%3A%2F%2Fdx.doi.org%2F10.5307%2FJBE.2012.37.1.058 https://www.researchgate.net/deref/http%...	1.1	5.2	3.6	32	0.5	0.5	72
UASB REACTOR
Present study	2.2	0.8	0.4	2.0	1.6	0.7	73
Pacco et al., (2018)Pacco A, Vela R, Miglio R, Quipuzco L, Juscamaita J, Álvarez C, Fernández-Polanco F (2018) Proposal design parameters of a UASB reactor treating swine wastewater. Scientia Agropecuaria 9:381-391. DOI: http://dx.doi.org/10.17268/sci.agropecu.2018.03.09 http://dx.doi.org/10.17268/sci.agropecu....	–	–	–	≈ 3.0	0.9	–	≈ 75
Bergland et al., (2015)Bergland WH, Dinamarca C, Toradzadegan M, Nordgard ASR, Bakke I, Bakke R (2015) High rate manure supernatant digestion. Water Research 76:1-9. DOI: https://doi.org/10.1016/j.watres.2015.02.051 https://doi.org/10.1016/j.watres.2015.02...	≈3.6	1.4	0.7	1.8	–	–	–
Bortoli et al., (2009)Bortoli M, Kunz A, Soares HM (2009) Comparative between UASB reactor and biodigester for generation of biogas in the treatment of swine manure. International Symposium on Agricultural and Agroindustry Waste Management. Available: http://sbera.org.br/sigera2009/downloads/obras/047.pdf. Acessed: July 15, 2016. http://sbera.org.br/sigera2009/downloads...	2.8	0.4	0.3	1.0	1.4	1.6	75

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[1] *Corresponding author. Western Paraná State University/ Cascavel - PR, Brazil. E-mail: marbiocomb@gmail.com