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Dahunsi SO. Mechanical pretreatment of lignocelluloses for enhanced biogas production: Methane yield prediction from biomass structural components. BIORESOURCE TECHNOLOGY 2019; 280:18-26. [PMID: 30754002 DOI: 10.1016/j.biortech.2019.02.006] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2019] [Revised: 01/29/2019] [Accepted: 02/01/2019] [Indexed: 05/22/2023]
Abstract
In this study, mechanical pretreatment was applied to six different lignocelluloses in two different treatment phases and the prediction of their methane yield was done from biomass chemical composition. Physicochemical, proximate and microbial analyses were carried out on both pretreated and untreated biomass using standard methods. Mechanical pretreatments caused the breakdown of structural materials in all the used biomass which was characterized by reduction of the lagging time during anaerobic digestion and the subsequent increase in methane yield up to 22%. The different loading rate of biomass had no effect on the overall methane yield increase. Both single and multiple linear regressions models were used in order to correlate the chemical composition of the biomass with their methane potentials and a fairly high correlation (R2 = 0.63) was obtained. The study also showed that the pretreatments are economically feasible. Therefore, its further application to other biomass is encouraged.
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Affiliation(s)
- S O Dahunsi
- Faculty of Environment and Labour Safety, Ton Duc Thang University, Ho Chi Minh City, Viet Nam; Biomass and Bioenergy Group, Environment and Technology Research Cluster, Landmark University, Nigeria.
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102
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Hu YY, Wu J, Li HZ, Poncin S, Wang KJ, Zuo JE. Novel insight into high solid anaerobic digestion of swine manure after thermal treatment: Kinetics and microbial community properties. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2019; 235:169-177. [PMID: 30682669 DOI: 10.1016/j.jenvman.2019.01.047] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2018] [Revised: 12/24/2018] [Accepted: 01/16/2019] [Indexed: 06/09/2023]
Abstract
Compared to traditional anaerobic digestion (AD), high solid anaerobic digestion (HSAD) had the advantages of small digester, low heating energy and less digestate. However, the methane production was poor. In our previous study, thermal treatment (70 ± 1 °C, 3 days) without any dilution could satisfactorily enhance the methane production rate of HSAD by up to 39.5%. However, effects of solid content on HSAD after thermal treatment were not yet studied. In this study, HSAD was conducted at 11.7-17.6% solid content, and the control experiment was conducted at low solid content (4.4% solid content). Results showed that HSAD's methane production rate was the highest at 11.7% solid content (158 mL CH4/g VS), and could reach up to 89.2% of that at 4.4% solid content. The utilization of organics was revealed by kinetics analysis that the readily biodegradable organics could be utilized at increasing solid content with decreasing hydrolysis rate. Furthermore, it was notable that methylotrophic methanogens predominated in HSAD with the abundance of 82.6%. This was quite unique from the general belief that AD system was usually dominated by acetoclastic or hydrogenotrophic methanogenic pathways. In this study, the microbial community structure of HSAD after thermal treatment was firstly studied, its unique specific methanogenic pathways was firstly revealed.
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Affiliation(s)
- Yu-Ying Hu
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084, China; School of Civil Engineering and Architecture, East China Jiao Tong University, Nanchang, 330013, China
| | - Jing Wu
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084, China.
| | - Huai-Zhi Li
- Laboratory of Reactions and Process Engineering, Université de Lorraine, CNRS, 1, rue Grandville, BP 20451, 54001, Nancy Cedex, France
| | - Souhila Poncin
- Laboratory of Reactions and Process Engineering, Université de Lorraine, CNRS, 1, rue Grandville, BP 20451, 54001, Nancy Cedex, France
| | - Kai-Jun Wang
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084, China
| | - Jian-E Zuo
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084, China
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103
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Recent Updates on the Use of Agro-Food Waste for Biogas Production. APPLIED SCIENCES-BASEL 2019. [DOI: 10.3390/app9061217] [Citation(s) in RCA: 52] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The production of biogas from anaerobic digestion (AD) of residual agro-food biomasses represents an opportunity for alternative production of energy from renewable sources, according to the European Union legislation on renewable energy. This review provides an overview of the various aspects involved in this process with a focus on the best process conditions to be used for AD-based biogas production from residual agro-food biomasses. After a schematic description of the AD phases, the biogas plants with advanced technologies were described, pointing out the strengths and the weaknesses of the different digester technologies and indicating the main parameters and operating conditions to be monitored. Subsequently, a brief analysis of the factors affecting methane yield from manure AD was conducted and the AD of fruit and vegetables waste was examined. Particular attention was given to studies on co-digestion and pre-treatments as strategies to improve biogas yield. Finally, the selection of specific microorganisms and the genetic manipulation of anaerobic bacteria to speed up the AD process was illustrated. The open challenges concern the achievement of the highest renewable energy yields reusing agro-food waste with the lowest environmental impact and an increment of competitiveness of the agricultural sector in the perspective of a circular economy.
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104
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Pan J, Ma J, Liu X, Zhai L, Ouyang X, Liu H. Effects of different types of biochar on the anaerobic digestion of chicken manure. BIORESOURCE TECHNOLOGY 2019; 275:258-265. [PMID: 30594835 DOI: 10.1016/j.biortech.2018.12.068] [Citation(s) in RCA: 81] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2018] [Revised: 12/16/2018] [Accepted: 12/20/2018] [Indexed: 05/22/2023]
Abstract
This study investigated the impact of different types of biochar on the anaerobic digestion (AD) of chicken manure. Wheat straw, discarded fruitwood, and air-dried chicken manure were pyrolysed at 350, 450, and 550 °C to generate biochar. A lab-scale batch anaerobic digestion experiment was conducted at 35 ± 1 °C. Substantial improvements in methane production were observed for all nine types of biochar. With the production of 294 mL CH4/g VSadded, fruitwood char pyrolysed at 550 °C increased the methane yield by 69% from the control. Characteristic analysis indicated that fruitwood char pyrolysed at 550 °C exhibited the largest specific surface area and highest total ammonia nitrogen reduction capacity. The buffering capacity of the AD system was improved by the biochar through accelerating the transformation of macromolecular substances to dissolved substrates and reducing the contents of soluble salts, total ammonia nitrogen, and free ammonia.
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Affiliation(s)
- Junting Pan
- Key Laboratory of Non-point Source Pollution of Ministry of Agricultural and Rural Affairs, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, 100081 Beijing, PR China
| | - Junyi Ma
- Key Laboratory of Non-point Source Pollution of Ministry of Agricultural and Rural Affairs, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, 100081 Beijing, PR China
| | - Xiaoxia Liu
- Environmental Factors Risk Assessment Laboratory of Agricultural Products Quality and Safety of Ministry of Agriculture and Rural Affairs, Beijing Station of Agro-Environmental Monitoring, 100029 Beijing, PR China
| | - Limei Zhai
- Key Laboratory of Non-point Source Pollution of Ministry of Agricultural and Rural Affairs, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, 100081 Beijing, PR China
| | - Xihui Ouyang
- Environmental Factors Risk Assessment Laboratory of Agricultural Products Quality and Safety of Ministry of Agriculture and Rural Affairs, Beijing Station of Agro-Environmental Monitoring, 100029 Beijing, PR China
| | - Hongbin Liu
- Key Laboratory of Non-point Source Pollution of Ministry of Agricultural and Rural Affairs, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, 100081 Beijing, PR China.
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105
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Ülgüdür N, Demirer GN. Anaerobic treatability and residual biogas potential of the effluent stream of anaerobic digestion processes. WATER ENVIRONMENT RESEARCH : A RESEARCH PUBLICATION OF THE WATER ENVIRONMENT FEDERATION 2019; 91:259-268. [PMID: 30624833 DOI: 10.1002/wer.1048] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2018] [Revised: 11/14/2018] [Accepted: 12/07/2018] [Indexed: 06/09/2023]
Abstract
Although anaerobic digestion is a well-established technology, the treatment and disposal of the digestate still presents a challenge due to lack of viable methods for processing. The residual organic matter in digestates also creates a significant residual biogas potential. This fact indicates that the digestates need further processing not only to reduce their organic content for disposal, but also to capture the biogas associated with this residual organic content. This study investigated anaerobic treatment and residual biogas potential of digestates obtained from five full-scale farm-based digesters. The results indicated that it was possible to reduce the total chemical oxygen demand (CODt ) of the digestates with an efficiency of 21%-84%. The corresponding biogas yields of digestates ranged between 0.078 and 0.326 Lbiogas /g VSadded . This level of biogas production is comparable to the biogas production potential of several commonly used raw substrates. PRACTITIONER POINTS: Significant CODt reduction and biogas capture can be attained by AD of digestates. The digestates subjected to anaerobic treatment yielded up to 82% CODt removal. Residual biogas yields of digestates ranged between 0.078-0.326 Lbiogas/g VSadded. Biogas yields obtained were comparable to many raw feedstocks of biogas plants.
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Affiliation(s)
- Nilüfer Ülgüdür
- Department of Environmental Engineering, Düzce University, Düzce, Turkey
| | - Göksel Niyazi Demirer
- School of Engineering and Technology, Central Michigan University, Mount Pleasant, Michigan
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106
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Bohutskyi P, Phan D, Spierling RE, Kopachevsky AM, Bouwer EJ, Lundquist TJ, Betenbaugh MJ. Production of lipid-containing algal-bacterial polyculture in wastewater and biomethanation of lipid extracted residues: Enhancing methane yield through hydrothermal pretreatment and relieving solvent toxicity through co-digestion. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 653:1377-1394. [PMID: 30759577 DOI: 10.1016/j.scitotenv.2018.11.026] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2018] [Revised: 10/11/2018] [Accepted: 11/02/2018] [Indexed: 06/09/2023]
Abstract
The feasibility of generating a lipid-containing algal-bacterial polyculture biomass in municipal primary wastewater and enhancing biomethanation of lipid-extracted algal residues (LEA) through hydrothermal pretreatment and co-digestion with sewage sludge (SS) was investigated. In high-rate algal ponds, the polyculture of native algal and bacteria species demonstrated a monthly average net and gross biomass productivity of 30 ± 3 and 36 ± 3 gAFDW m-2 day-1 (summer season). The algal community was dominated by Micractinium sp. followed by Scenedesmus sp., Chlorella sp., pennate diatoms and Chlamydomonas sp. The polyculture metabolic activities resulted in average reductions of wastewater volatile suspended solids (VSS), carbonaceous soluble biochemical oxygen demand (csBOD5) and total nitrogen (Ntotal) of 63 ± 18%, 98 ± 1% and 76 ± 21%, respectively. Harvested biomass contained nearly 23% lipid content and an extracted blend of fatty acid methyl esters satisfied the ASTM D6751 standard for biodiesel. Anaerobic digestion of lipid extracted algal residues (LEA) demonstrated long lag-phase in methane production of 17 days and ultimate methane yield of 296 ± 2 mL/gVS (or ~50% of theoretical), likely because to its limited biodegradability and toxicity due to presence of the residual solvent (hexane). Hydrothermal pretreatment increased the ultimate methane yield and production rate by 15-30% but did not mitigate solvent toxicity effects completely leading to less substantial improvement in energy output of 5-20% and diminished Net Energy Ratio (NER < 1). In contrast, co-digestion of LEA with sewage sludge (10% to 90% ratio) was found to minimize solvent toxicity and improve methane yield enhancing the energy output ~4-fold, compared to using LEA as a single substrate, and advancing NER to 4.2.
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Affiliation(s)
- Pavlo Bohutskyi
- Biological Sciences Division, Pacific Northwest National Laboratory, 3300 Stevens Dr., Richland, WA 99354, USA.
| | - Duc Phan
- Department of Environmental Health and Engineering, Johns Hopkins University, 3400 North Charles Street, Baltimore, MD 21218-2686, USA; Department of Civil and Environmental Engineering, The University of Texas at San Antonio, 1 UTSA Cir San Antonio, TX 78249, USA
| | - Ruth E Spierling
- Civil and Environmental Engineering Department, California Polytechnic State University, 1 Grand Ave., San Luis Obispo, CA 93407, USA; MicroBio Engineering Inc, PO Box 15821, San Luis Obispo, CA 93406, USA
| | - Anatoliy M Kopachevsky
- Department of Water Supply and Sanitary Engineering, Academy of Construction and Architecture of V.I. Vernadsky Crimean Federal University, 4 Prospekt Vernadskogo, Simferopol 295007, Republic of Crimea; Water Technologies Research and Production Company, 7 Petropavlovskaya street, Simferopol 295000, Republic of Crimea; Water of the Crimea State Unitary Enterprise of the Republic of Crimea, 1а Kievskaya street, Simferopol 295053, Republic of Crimea
| | - Edward J Bouwer
- Department of Environmental Health and Engineering, Johns Hopkins University, 3400 North Charles Street, Baltimore, MD 21218-2686, USA
| | - Trygve J Lundquist
- Civil and Environmental Engineering Department, California Polytechnic State University, 1 Grand Ave., San Luis Obispo, CA 93407, USA; MicroBio Engineering Inc, PO Box 15821, San Luis Obispo, CA 93406, USA
| | - Michael J Betenbaugh
- Department of Chemical & Biomolecular Engineering, Johns Hopkins University, 3400 North Charles Street, Baltimore, MD 21218-2686, USA
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107
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Catenacci A, Azzellino A, Malpei F. Development of statistical predictive models for estimating the methane yield of Italian municipal sludges from chemical composition: a preliminary study. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2019; 79:435-447. [PMID: 30924798 DOI: 10.2166/wst.2019.063] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The biochemical methane potential (BMP) of primary and biological sludge varies in a wide range, mostly depending on location, sewer characteristics, wastewater treatment plant design and operating conditions. BMP tests are useful to verify the performance of a full scale digester, but they are not yet a common procedure in the operation of most Italian facilities because of cost and test duration. Changes in the composition of sewage sludge can lead to a high variation of biogas production. Aimed at developing BMP predictive models based on low cost and fast analyses, this study investigated the chemical composition of 20 sludge samples by means of principal component and multiple linear regression analyses. Three preliminary predictive models were developed based on soluble organic nitrogen, volatile solids, carbohydrates, proteins, lipids and an operational parameter, the sludge retention time: the explained variance and the standard errors of prediction of BMP are in the range 77-81% and 21-34 NmLCH4·gVS -1, respectively. Models were evaluated on five additional samples: errors ranged 2-15% for four samples and about 54% for one sample, collected from a peculiar facility. Further data and variables describing the operation mode of the waterline would certainly improve the reliability and robustness of the models.
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Affiliation(s)
- A Catenacci
- Department of Civil and Environmental Engineering (DICA), Politecnico di Milano, P.zza L. da Vinci 32, 20133 Milano, Italy E-mail:
| | - A Azzellino
- Department of Civil and Environmental Engineering (DICA), Politecnico di Milano, P.zza L. da Vinci 32, 20133 Milano, Italy E-mail:
| | - F Malpei
- Department of Civil and Environmental Engineering (DICA), Politecnico di Milano, P.zza L. da Vinci 32, 20133 Milano, Italy E-mail:
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108
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Rodrigues RP, Rodrigues DP, Klepacz-Smolka A, Martins RC, Quina MJ. Comparative analysis of methods and models for predicting biochemical methane potential of various organic substrates. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 649:1599-1608. [PMID: 30308928 DOI: 10.1016/j.scitotenv.2018.08.270] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2018] [Revised: 08/18/2018] [Accepted: 08/20/2018] [Indexed: 06/08/2023]
Abstract
Biochemical methane potential (BMP) corresponds to the maximum methane production at anaerobic digestion infinite time and is a key parameter to evaluate the suitability of substrates to obtain biogas. The main objective of this work is to explore the data available in the literature for ten categories of substrates to compare and develop new methods and mathematical models able to predict BMP. Indeed, experimental procedure is time-consuming, laborious and costly, and the development of methods or models based on properties easily assessed may be very helpful at industrial scale. In this study, three substrates (banana waste, tomato waste and winery wastewater) were tested and compared with >150 results from the literature. The analysis involved four methods (Met_I to Met_IV) and five models developed by multivariate regression (Mod_I to Mod_V). Met_I is related to elemental analysis; Met_II with the organic fraction composition; Met_III is associated with chemical oxygen demand (COD); Met_IV is based on NIR spectra. Regression models are combinations by grouping single variables: C, H, O, N (Mod_I); hemicellulose, lignin (LG), acid detergent fibre (ADF) (Mod_II); volatile solids (VS), COD (Mod_III); proteins (PT), carbohydrates (CRB), lipids (LP) (Mod_IV); and CRB, LP, PT, LG, ADF (Mod_V). The results showed that no significant correlation can be found between BMP and single common properties (e.g. VS or C/N ratio). However, good results may be achieved with models developed by multivariate regression (R2 from 0.93 to 0.98, and R2adj from 0.91 to 0.96). The prediction of BMP based on Met_IV, which is based on NIR spectroscopy combined with a multivariate regression model, revealed to be a promising method for both data from literature as well as for substrates analyzed in the present work.
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Affiliation(s)
- R P Rodrigues
- CIEPQPF- Chemical Process Engineering and Forest Products Research Centre, Department of Chemical Engineering, University of Coimbra, Rua Sílvio Lima, 3030-790 Coimbra, Portugal
| | - D P Rodrigues
- CIEPQPF- Chemical Process Engineering and Forest Products Research Centre, Department of Chemical Engineering, University of Coimbra, Rua Sílvio Lima, 3030-790 Coimbra, Portugal
| | - A Klepacz-Smolka
- Faculty of Process and Environmental Engineering, Lodz University of Technology, Wolczanska 213, 90-924 Lodz, Poland
| | - R C Martins
- CIEPQPF- Chemical Process Engineering and Forest Products Research Centre, Department of Chemical Engineering, University of Coimbra, Rua Sílvio Lima, 3030-790 Coimbra, Portugal
| | - M J Quina
- CIEPQPF- Chemical Process Engineering and Forest Products Research Centre, Department of Chemical Engineering, University of Coimbra, Rua Sílvio Lima, 3030-790 Coimbra, Portugal.
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109
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Abstract
After nearly two decades of subsidized and energy crop-oriented development, agricultural biogas production in Germany is standing at a crossroads. Fundamental challenges need to be met. In this article we sketch a vision of a future agricultural biogas plant that is an integral part of the circular bioeconomy and works mainly on the base of residues. It is flexible with regard to feedstocks, digester operation, microbial communities and biogas output. It is modular in design and its operation is knowledge-based, information-driven and largely automated. It will be competitive with fossil energies and other renewable energies, profitable for farmers and plant operators and favorable for the national economy. In this paper we discuss the required contribution of research to achieve these aims.
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110
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NIQUINI GABRIELAR, SILVA SUZIMARAR, COSTA JUNIOR ESLYF, COSTA ANDRÉAO. Feedstock and inoculum characteristics and process parameters as predictors for methane yield in mesophilic solid-state anaerobic digestion. AN ACAD BRAS CIENC 2019. [DOI: 10.1590/0001-3765201920181181] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
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111
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Evaluation of Biochemical Methane Potential and Kinetics on the Anaerobic Digestion of Vegetable Crop Residues. ENERGIES 2018. [DOI: 10.3390/en12010026] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
There is a lack of literature reporting the measurement and prediction of biochemical methane potential (BMP) of vegetable crop residues (VCRs) and similarly, the kinetic assessment on the anaerobic digestion process of VCR is rarely investigated. In this paper, the BMP tests of five different vegetable (snap bean, capsicum, cucumber, eggplant, and tomato) crop residues were conducted at feed to inoculum ratio (F/I) of 2.0 under mesophilic (36 ± 1 °C) conditions. A series of single-variable and multiple-variable regression models were built based on organic components (hemicellulose, cellulose, lignin, total fat, total sugar, and crude protein) for BMP prediction. Three kinetic models, including the first-order kinetic model, the Chen and Hashimoto model, and the modified Gompertz model, were used to simulate the methane yield results of VCR and obtain valuable model parameters simultaneously. As a result, the BMPs and volatile solids (VS) degradation degree of different VCRs were respectively in the range of 94.2–146.8 mL g−1 VS and 40.4–49.9%; the regression prediction models with variables lignin (R2 = 0.704, p = 0.076), variables crude protein and lignin (R2 = 0.976, p = 0.048), and variables total fat, hemicellulose, and lignin (R2 = 0.999, p = 0.027) showed the best performance on BMP prediction among the single-factor, two-factor, and three-factor models, respectively. In addition, compared to the other two kinetic models, the modified Gompertz model could be excellently fitted (R2 = 0.986–0.998) to the results of BMP experiment, verification deviations within 0.3%.
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112
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Elsayed M, Abomohra AEF, Ai P, Wang D, El-Mashad HM, Zhang Y. Biorefining of rice straw by sequential fermentation and anaerobic digestion for bioethanol and/or biomethane production: Comparison of structural properties and energy output. BIORESOURCE TECHNOLOGY 2018; 268:183-189. [PMID: 30077878 DOI: 10.1016/j.biortech.2018.07.130] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2018] [Revised: 07/25/2018] [Accepted: 07/26/2018] [Indexed: 06/08/2023]
Abstract
Three routes; namely R1 representing direct anaerobic digestion (AD), R2 representing enzymatic hydrolysis followed by fermentation, distillation, then AD, and R3 representing AD of fermentation broth without distillation; of alkali pretreated rice straw were investigated. Results showed that sequential fermentation and AD effectively enhanced fibers degradation with significant changes in the composition. Fermentation through R2 resulted in ethanol yield of 87.4 g kg-1 dry straw. Maximum biogas yields of 286.9, 233.3 and 372.4 L kg-1 VS were recorded by AD for R1, R2 and R3 after reaching the steady state at 36, 24 and 33 days, respectively. However, biogas produced through R3 showed the highest significant biomethane content (79.3%) which represented 15 and 8% higher than that of R1 and R2, respectively. Therefore, the highest bioenergy output and energy conversion efficiency of 10.58 GJ ton-1 and 75.6%, respectively, were obtained through R3 demonstrating the positive effect of fermentation prior to AD.
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Affiliation(s)
- Mahdy Elsayed
- College of Engineering, Huazhong Agricultural University, 430070 Wuhan, China; Department of Agricultural Engineering, Faculty of Agriculture, Cairo University, 12613 Giza, Egypt
| | - Abd El-Fatah Abomohra
- School of Energy and Power Engineering, Jiangsu University, 212013 Jiangsu, China; Botany Department, Faculty of Science, Tanta University, 31527 Tanta, Egypt
| | - Ping Ai
- College of Engineering, Huazhong Agricultural University, 430070 Wuhan, China.
| | - Dianlong Wang
- School of Life Science and Food Engineering, Huaiyin Institute of Technology, Huaian, China
| | - Hamed M El-Mashad
- Department of Agricultural Engineering, Mansoura University, El-Mansoura, Egypt
| | - Yanlin Zhang
- College of Engineering, Huazhong Agricultural University, 430070 Wuhan, China
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113
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Biochemical Conversion and Microbial Community in Response to Ternary pH Buffer System during Anaerobic Digestion of Swine Manure. ENERGIES 2018. [DOI: 10.3390/en11112991] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The ternary pH buffer system with ammonia-carbonates-volatile fatty acids (VFAs) is essential to anaerobes for bioenergy recovery via anaerobic digestion (AD). However, ammonia and VFAs are recognized as potential inhibitors that depress methanogenesis. In this study, biochemical conversion and the microbial community in batch AD at total solid (TS) from 4% to 14% were investigated to reveal their response to the ternary pH buffer system. The rapid ammonia release, probably promoted by Anaerosphaera and Eubacterium inferred from the concurrent peak of their relative abundance, triggered total ammonia (TAN) inhibition with the accumulation of VFAs in the start-up stage of high solid AD (HSAD, TS ≥ 8%). Along with evolution of the microbial community to resist high TAN and VFAs, methanogenesis recovered with improved degradation of VFAs and reduction of COD. When exposed to 3500 mg·N·L−1 TAN at 8% TS, aceticlastic Methanosarcina became dominant first and then together with hydrogenotrophic Methanoculleus, achieved the optimal biochemical conversion. While in HSAD at 11–14% TS, the main pathway of methanogenesis appeared to have shifted from the aceticlastic pathway to the hydrogenotrophic pathway, as inferred by changes in the relative abundance of methanogens, and this could have been induced by the increasing concentration of high free ammonia (FAN, ≥588 mg·N·L−1). Although the anaerobes had acclimatized to high TAN, the propionate-oxidizing bacteria and acetate-oxidizing bacteria might have again been inhibited by high FAN, frustrating the H2 supply for FAN-tolerant Methanoculleus and causing an 8.2–11.3% depression of COD reduction (mainly propionate residual).
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114
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Elghandour MMMY, Adegbeye MJ, Barbabosa-Pilego A, Perez NR, Hernández SR, Zaragoza-Bastida A, Salem AZM. Equine Contribution in Methane Emission and Its Mitigation Strategies. J Equine Vet Sci 2018; 72:56-63. [PMID: 30929784 DOI: 10.1016/j.jevs.2018.10.020] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2018] [Revised: 10/17/2018] [Accepted: 10/17/2018] [Indexed: 11/26/2022]
Abstract
Greenhouses gas emission mitigation is a very important aspect of earth sustainability with greenhouse gasses reduction, a focus of agricultural and petrochemical industries. Methane is produced in nonruminant herbivores such as horses because they undergo hindgut fermentation. Although equine produce less methane than ruminant, increasing population of horses might increase their contribution to the present 1.2 to 1.7 Tg, estimate. Diet, feeding frequency, season, genome, and protozoa population influence methane production equine. In population, Methanomicrobiales, Methanosarcinales, Methanobacteriales, and Methanoplasmatales are the clade identified in equine. Methanocorpusculum labreanum is common among hindgut fermenters like horses and termite. Naturally, acetogenesis and interrelationship between the host and the immune-anatomical interaction are responsible for the reduced methane output in horses. However, to reduce methane output in equine, and increase energy derived from feed intake, the use of biochar, increase in acetogens, inclusion of fibre enzymes and plant extract, and recycling of fecal energy through anaerobic gas fermentation. These might be feasible ways to reducing methane contribution from horse and could be applied to ruminants too.
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Affiliation(s)
- Mona M M Y Elghandour
- Facultad de Medicina Veterinaria y Zootecnia, Universidad Autónoma del Estado de México, Estado de México, México
| | - Moyosore Joseph Adegbeye
- Department of Animal Science, College of Agriculture, Joseph Ayo Babalola University, Ilesha, Nigeria
| | - Alberto Barbabosa-Pilego
- Facultad de Medicina Veterinaria y Zootecnia, Universidad Autónoma del Estado de México, Estado de México, México
| | - Nallely Rivero Perez
- Área Académica de Medicina Veterinaria y Zootecnia, Instituto de Ciencias Agropecuaria, Universidad Autónoma del Estado de Hidalgo, Pachuca, Mexico
| | - Saúl Rojas Hernández
- Facultad de Medicina Veterinaria y Zootecnia, Universidad Autónoma de Guerrero, Guerrero, Mexico
| | - Adrian Zaragoza-Bastida
- Área Académica de Medicina Veterinaria y Zootecnia, Instituto de Ciencias Agropecuaria, Universidad Autónoma del Estado de Hidalgo, Pachuca, Mexico
| | - Abdelfattah Z M Salem
- Facultad de Medicina Veterinaria y Zootecnia, Universidad Autónoma del Estado de México, Estado de México, México.
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115
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Enhancing Biochemical Methane Potential and Enrichment of Specific Electroactive Communities from Nixtamalization Wastewater using Granular Activated Carbon as a Conductive Material. ENERGIES 2018. [DOI: 10.3390/en11082101] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Nejayote (corn step liquor) production in Mexico is approximately 1.4 × 1010 m3 per year and anaerobic digestion is an effective process to transform this waste into green energy. The biochemical methane potential (BMP) test is one of the most important tests for evaluating the biodegradability and methane production capacity of any organic waste. Previous research confirms that the addition of conductive materials significantly enhances the methane production yield. This study concludes that the addition of granular activated carbon (GAC) increases methane yield by 34% in the first instance. Furthermore, results show that methane production is increased by 54% when a GAC biofilm is developed 10 days before undertaking the BMP test. In addition, the electroactive population was 30% higher when attached to the GAC than in control reactors. Moreover, results show that electroactive communities attached to the GAC increased by 38% when a GAC biofilm is developed 10 days before undertaking the BMP test, additionally only in these reactors Geobacter was identified. GAC has two main effects in anaerobic digestion; it promotes direct interspecies electron transfer (DIET) by developing an electro-active biofilm and simultaneously it reduces redox potential from −223 mV to −470 mV. These results suggest that the addition of GAC to biodigesters, improves the anaerobic digestion performance in industrial processed food waste.
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116
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Córdoba V, Fernández M, Santalla E. The effect of substrate/inoculum ratio on the kinetics of methane production in swine wastewater anaerobic digestion. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:21308-21317. [PMID: 28875251 DOI: 10.1007/s11356-017-0039-6] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2016] [Accepted: 08/25/2017] [Indexed: 06/07/2023]
Abstract
Methane production from swine wastewater was evaluated by using sewage sludge as inoculum in three substrate to inoculum ratios (SIRs) named A (1:1), B (3:1) and C (6:1), with the objective to identify the proportion that optimizes the performance of the process. Duplicated batch bioreactors of 1 L capacity under mesophilic conditions were used to carry out the experiment. The highest biogas yield was observed in A treatment (554 ± 75 mL/g volatile solid (VS)). Cumulative methane production decreased from 382 ± 22 to 232 ± 5 mL/g VS when SIR increased from 1:1 to 6:1. The first-order model and the modified Gompertz equation were used to model the experimental cumulative methane yield giving adjustments with coefficients of determination of 96 and 99% respectively. The effect of the SIR was analysed based on the kinetic parameters of the Gompertz equation, which are methane production potential, maximum methane production rate and lag-phase time. The best performance in terms of the kinetic parameters was obtained for treatment A; however, treatment B could still ensure a stable process. The use of higher inoculum concentration generated 463.1% higher methane production rate and required 77.3% shorter adaptation time (lag phase) in the SIR range studied. When higher SIR was used (e.g. 14:1, previous work), it could be observed that the Gompertz equation also adjusted adequately the experimental data (R 2 > 0.99) although the lag-phase time did not remain in a linear relationship with SIR but exponentially above SIR = 6:1. These results demonstrated that when a low amount of inoculum was used, the adaptation time of microorganisms resulted much higher than expected delaying the methane production and extending the time needed to achieve adequate performance of the process.
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Affiliation(s)
- Verónica Córdoba
- Centro de Tecnologías Ambientales y Energía (cTAE), INTELYMEC, Facultad de Ingeniería, Universidad Nacional del Centro de la Provincia de Buenos Aires (UNCPBA), Av. Del Valle 5737, B7400 JWI, Olavarría, Argentina.
| | - Mónica Fernández
- Centro de Tecnologías Ambientales y Energía (cTAE), INTELYMEC, Facultad de Ingeniería, Universidad Nacional del Centro de la Provincia de Buenos Aires (UNCPBA), Av. Del Valle 5737, B7400 JWI, Olavarría, Argentina
| | - Estela Santalla
- Centro de Tecnologías Ambientales y Energía (cTAE), INTELYMEC, Facultad de Ingeniería, Universidad Nacional del Centro de la Provincia de Buenos Aires (UNCPBA), Av. Del Valle 5737, B7400 JWI, Olavarría, Argentina
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117
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Tsapekos P, Kougias PG, Angelidaki I. Mechanical pretreatment for increased biogas production from lignocellulosic biomass; predicting the methane yield from structural plant components. WASTE MANAGEMENT (NEW YORK, N.Y.) 2018; 78:903-910. [PMID: 32559985 DOI: 10.1016/j.wasman.2018.07.017] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2018] [Revised: 05/14/2018] [Accepted: 07/06/2018] [Indexed: 05/25/2023]
Abstract
Lignocellulosic substrates are associated with limited biodegradability due to the structural complexity. For that reason, a pretreatment step is mandatory for efficient biomass transformation which will lead to increased bioenergy output. The aim of the present study was to assess the efficiency of two pretreatment machines to enhance the methane yield of meadow grass. Specifically, the application of shearing forces with a rotated plastic sweeping brush against a steel roller significantly increased biomass biodegradability by 20% under relatively gentle operation conditions (600 rpm). The more intense operation (1200 rpm) was not associated with higher methane yield enhancement. Regarding an alternative machine, in which the brush was replaced with a coarse steel roller resulted in a more distinct effect (+27%) despite the lower rotating speed (∼400 rpm). Moreover, the association of the substrate's individual chemical components and the practical methane yield was assessed, establishing single and multiple linear regression models. However, the estimation accuracy was rather low with either single (regressor: lignin, R2: 0.50) or multiple linear regression analyses (regressors: arabinan-lignin-protein, R2: 0.61). Results showed that poorly lignified plant tissue containing relatively high fractions of protein and arabinan is more susceptible to anaerobic digestion.
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Affiliation(s)
- Panagiotis Tsapekos
- Department of Environmental Engineering, Technical University of Denmark, Kgs. Lyngby DK-2800, Denmark
| | - Panagiotis G Kougias
- Department of Environmental Engineering, Technical University of Denmark, Kgs. Lyngby DK-2800, Denmark.
| | - Irini Angelidaki
- Department of Environmental Engineering, Technical University of Denmark, Kgs. Lyngby DK-2800, Denmark
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118
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Mohamed MALI, Nourou DIA, Boudy BILAL, Mamoudou NDONGO. Theoretical models for prediction of methane production from anaerobic digestion: A critical review. ACTA ACUST UNITED AC 2018. [DOI: 10.5897/ijps2018.4740] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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119
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Assessment of Collective Production of Biomethane from Livestock Waste for Urban Transportation Mobility in Brazil and the United States. ENERGIES 2018. [DOI: 10.3390/en11040997] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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120
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VanderZaag AC, Baldé H, Crolla A, Gordon RJ, Ngwabie NM, Wagner-Riddle C, Desjardins R, MacDonald JD. Potential methane emission reductions for two manure treatment technologies. ENVIRONMENTAL TECHNOLOGY 2018; 39:851-858. [PMID: 28355494 DOI: 10.1080/09593330.2017.1313317] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2016] [Accepted: 03/25/2017] [Indexed: 06/06/2023]
Abstract
The effect of two dairy manure treatments, solid-liquid separation (SLS) and anaerobic digestion (AD), on methane potential and the speed of production was evaluated. Assays were performed in the lab to measure methane (CH4) production over 202 d from dairy manure samples taken before and after each treatment. Compared to raw manure, CH4 emissions on a per-L basis were reduced 81% by SLS and 59% by AD, on average. The mean (SD) ultimate CH4 emission potential (B0) per kg of volatile solids (VS) was 247 (8) L CH4 kg-1 VS for raw manure, 221 (9) L CH4 kg-1 VS for separated liquid, and 160 (4) L CH4 kg-1 VS for anaerobic digestate. Thus, SLS reduced the B0 of the liquid fraction by 11% and AD reduced B0 by up to 35% compared to raw manure. Manure treatment affected the speed of CH4 production: SLS increased the CH4 production rate and thus separated liquid manure was the fastest to produce 90% of the ultimate CH4 production. Therefore, both the speed of degradation and B0 should be considered when assessing these techniques for farm-scale manure storages, because actual emission reductions will depend on storage conditions.
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Affiliation(s)
- Andrew C VanderZaag
- a Ottawa Research and Development Centre , Agriculture and Agri-Food Canada , Ottawa , Canada
| | - Hambaliou Baldé
- a Ottawa Research and Development Centre , Agriculture and Agri-Food Canada , Ottawa , Canada
| | - Anna Crolla
- b Ontario Rural Wastewater Centre , University of Guelph , Alfred , Canada
| | - Robert J Gordon
- c Department of Geography and Environmental Studies , Wilfrid Laurier University , Waterloo , Canada
| | - N Martin Ngwabie
- a Ottawa Research and Development Centre , Agriculture and Agri-Food Canada , Ottawa , Canada
- d Department of Agricultural and Environmental Engineering , The University of Bamenda , Bamenda , Cameroon
| | | | - Ray Desjardins
- a Ottawa Research and Development Centre , Agriculture and Agri-Food Canada , Ottawa , Canada
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121
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Li Y, Xu F, Li Y, Lu J, Li S, Shah A, Zhang X, Zhang H, Gong X, Li G. Reactor performance and energy analysis of solid state anaerobic co-digestion of dairy manure with corn stover and tomato residues. WASTE MANAGEMENT (NEW YORK, N.Y.) 2018; 73:130-139. [PMID: 29223482 DOI: 10.1016/j.wasman.2017.11.041] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2017] [Revised: 11/21/2017] [Accepted: 11/23/2017] [Indexed: 06/07/2023]
Abstract
Anaerobic co-digestion is commonly believed to be benefical for biogas production. However, additional of co-substrates may require additional energy inputs and thus affect the overall energy efficiency of the system. In this study, reactor performance and energy analysis of solid state anaerobic digestion (SS-AD) of tomato residues with dairy manure and corn stover were investigated. Different fractions of tomato residues (0, 20, 40, 60, 80 and 100%, based on volatile solid weight (VS)) were co-digested with dairy manure and corn stover at 15% total solids. Energy analysis based on experimental data was conducted for three scenarios: SS-AD of 100% dairy manure, SS-AD of binary mixture (60% dairy manure and 40% corn stover, VS based), and SS-AD of ternary mixture (36% dairy manure, 24% corn stover, and 40% tomato residues, VS based). For each scenario, the energy requirements for individual process components, including feedstock collection and transportation, feedstock pretreatment, biogas plant operation, digestate processing and handling, and the energy production were examined. Results showed that the addition of 20 and 40% tomato residues increased methane yield compared to that of the dairy manure and corn stover mixture, indicating that the co-digestion could balance nutrients and improve the performance of solid-state anaerobic digestion. The energy required for heating substrates had the dominant effect on the total energy consumption. The highest volatile solids (VS) reduction (57.0%), methane yield (379.1 L/kg VSfeed), and net energy production were achieved with the mixture of 24% corn stover, 36% dairy manure, and 40% tomato residues. Thus, the extra energy input for adding tomato residues for co-digestion could be compensated by the increase of methane yield.
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Affiliation(s)
- Yangyang Li
- College of Resource and Environmental Science, China Agricultural University, Beijing 100193, China; Beijing Key Laboratory of Farmland Pollution Prevention-control and Remediation, Beijing 100193, China; Department of Food, Agricultural, and Biological Engineering, The Ohio State University, 44691, USA
| | - Fuqing Xu
- Department of Food, Agricultural, and Biological Engineering, The Ohio State University, 44691, USA
| | - Yu Li
- College of Resource and Environmental Science, China Agricultural University, Beijing 100193, China
| | - Jiaxin Lu
- College of Resource and Environmental Science, China Agricultural University, Beijing 100193, China
| | - Shuyan Li
- College of Resource and Environmental Science, China Agricultural University, Beijing 100193, China; Beijing Key Laboratory of Farmland Pollution Prevention-control and Remediation, Beijing 100193, China
| | - Ajay Shah
- Department of Food, Agricultural, and Biological Engineering, The Ohio State University, 44691, USA
| | - Xuehua Zhang
- College of Resource and Environmental Science, China Agricultural University, Beijing 100193, China; Beijing Key Laboratory of Farmland Pollution Prevention-control and Remediation, Beijing 100193, China
| | - Hongyu Zhang
- Beijing Building Materials Academy of Science Research/State Key Laboratory of Solid Waste Reuse for Building Material, Beijing 100041, China
| | - Xiaoyan Gong
- College of Resource and Environmental Science, China Agricultural University, Beijing 100193, China; Beijing Key Laboratory of Farmland Pollution Prevention-control and Remediation, Beijing 100193, China
| | - Guoxue Li
- College of Resource and Environmental Science, China Agricultural University, Beijing 100193, China; Beijing Key Laboratory of Farmland Pollution Prevention-control and Remediation, Beijing 100193, China.
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122
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Pleissner D, Rumpold BA. Utilization of organic residues using heterotrophic microalgae and insects. WASTE MANAGEMENT (NEW YORK, N.Y.) 2018; 72:227-239. [PMID: 29150257 DOI: 10.1016/j.wasman.2017.11.020] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2017] [Revised: 08/31/2017] [Accepted: 11/08/2017] [Indexed: 06/07/2023]
Abstract
Various organic residues occur globally in the form of straw, wood, green biomass, food waste, feces, manure etc. Other utilization strategies apart from anaerobic digestion, composting and incineration are needed to make use of the whole potential of organic residues as sources of various value added compounds. This review compares the cultivation of heterotrophic microalgae and insects using organic residues as nutrient sources and illuminates their potential with regard to biomass production, productivity and yield, and utilization strategies of produced biomasses. Furthermore, cultivation processes as well as advantages and disadvantages of utilization processes are identified and discussed. It was shown that both heterotrophic algae and insects are able to reduce a sufficient amount of organic residues by converting it into biomass. The biomass composition of both organisms is similar which allows similar utilization strategies in food and feed, chemicals and materials productions. Even though insect is the more complex organism, biomass production can be carried out using simple equipment without sterilization and hydrolysis of organic residues. Contrarily, heterotrophic microalgae require a pretreatment of organic residues in form of sterilization and in most cases hydrolysis. Interestingly, the volumetric productivity of insect biomass exceeds the productivity of algal biomass. Despite legal restrictions, it is expected that microalgae and insects will find application as alternative food and feed sources in the future.
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Affiliation(s)
- Daniel Pleissner
- Sustainable Chemistry (Resource Efficiency), Institute of Sustainable and Environmental Chemistry, Leuphana University of Lüneburg, Universitätsallee 1, C13, 21335 Lüneburg, Germany.
| | - Birgit A Rumpold
- Leibniz Institute for Agricultural Engineering and Bioeconomy, Research Program Quality and Safety of Food and Feed, Max-Eyth-Allee 100, 14469 Potsdam, Germany; Technische Universität Berlin, Institute of Vocational Education and Work Studies, Department of Education of Sustainable Nutrition and Food Science, Marchstr. 23, 10587 Berlin, Germany
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123
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Jang HM, Choi YK, Kan E. Effects of dairy manure-derived biochar on psychrophilic, mesophilic and thermophilic anaerobic digestions of dairy manure. BIORESOURCE TECHNOLOGY 2018; 250:927-931. [PMID: 29198415 DOI: 10.1016/j.biortech.2017.11.074] [Citation(s) in RCA: 55] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2017] [Revised: 11/21/2017] [Accepted: 11/22/2017] [Indexed: 05/22/2023]
Abstract
Effects of dairy manure-derived biochar (M-BC) on methane production in anaerobic digestion (AD) of dry dairy manure were investigated with three different concentrations of biochar (0, 1 and 10 g/L) and temperatures (psychrophilic, 20 °C; mesophilic, 35 °C; thermophilic, 55 °C). Compared with the AD without any biochar, the cumulative methane and yield in the AD with 10 g/L biochar were increased to 27.65% and 26.47% in psychrophilic, 32.21% and 24.90% in mesophilic and 35.71% and 24.69% in thermophilic digestions. The addition of M-BC shortened the lag phases of AD at all temperatures in the study while it lowered the concentration of total VFAs and propionic acid. It was suggested that the high nutrients and alkalinity potential of M-BC (i.e. 9.1% Ca, 3.6% Mg, 1.3% N, 0.14% P) would play significant roles in enhancing methane production and shortening lag phases from the AD of dairy manure.
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Affiliation(s)
- Hyun Min Jang
- Texas A&M AgriLife Research Center, 1229 North US Highway 281, Stephenville, TX 76401, USA
| | - Yong-Keun Choi
- Texas A&M AgriLife Research Center, 1229 North US Highway 281, Stephenville, TX 76401, USA; Office of Sponsored Projects, Tarleton State University, 1333 W. Washington, Stephenville, TX 76401, USA
| | - Eunsung Kan
- Texas A&M AgriLife Research Center, 1229 North US Highway 281, Stephenville, TX 76401, USA; Office of Sponsored Projects, Tarleton State University, 1333 W. Washington, Stephenville, TX 76401, USA.
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124
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Zahan Z, Othman MZ, Muster TH. Anaerobic digestion/co-digestion kinetic potentials of different agro-industrial wastes: A comparative batch study for C/N optimisation. WASTE MANAGEMENT (NEW YORK, N.Y.) 2018; 71:663-674. [PMID: 28843753 DOI: 10.1016/j.wasman.2017.08.014] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2017] [Revised: 07/06/2017] [Accepted: 08/08/2017] [Indexed: 06/07/2023]
Abstract
Anaerobic digestion (AD) of different agro-industrial wastes and their co-digestion potential has been exhaustively studied in this research. It explores variation of feedstock characteristics such as biodegradability and methane potential during AD and anaerobic co-digestion (ACoD) of chicken litter (CL) with yoghurt whey (YW), organic fraction of municipal solid waste (OFMSW), hay grass (HG) and wheat straw (WS) under mesophilic conditions. Comparative performance was made at different loading concentrations (2%, 3% and 4% VS) with 1:2g/g VS of substrate to inoculum and carrying C/N ratio. Among different kinetic models, the AD of single substrates showed better fit to the modified Gompertz model (R2: 0.93-0.997) indicating variation in lag phase and methane production rate depend on the substrate characteristics. During ACoD, the methane yield improved by 9-85% through the addition of two, three or four substrates due to the synergistic effect asa result of increased biodegradability and optimum conditions (such asC/N ratio). A surface (optimisation) model indicated that maximum methane production can be achieved by blending chicken litter (30-35%) and a (65-70%) mixture of yoghurt whey, hay and wheat straw with aC/N ratio of (26-27.5).
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Affiliation(s)
- Zubayeda Zahan
- School of Engineering-Civil, Environmental & Chemical Engineering Disciplines, RMIT University, P.O. Box 2476, Melbourne, Victoria 3001, Australia.
| | - Maazuza Z Othman
- School of Engineering-Civil, Environmental & Chemical Engineering Disciplines, RMIT University, P.O. Box 2476, Melbourne, Victoria 3001, Australia
| | - Tim H Muster
- CSIRO Land and Water, Private Bag 2., Glen Osmond 5064, South Australia, Australia
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125
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El Achkar JH, Lendormi T, Salameh D, Louka N, Maroun RG, Lanoisellé JL, Hobaika Z. Anaerobic digestion of grape pomace: Effect of the hydraulic retention time on process performance and fibers degradability. WASTE MANAGEMENT (NEW YORK, N.Y.) 2018; 71:137-146. [PMID: 29122460 DOI: 10.1016/j.wasman.2017.11.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2017] [Revised: 10/26/2017] [Accepted: 11/01/2017] [Indexed: 06/07/2023]
Abstract
To optimize the anaerobic digestion of grape pomace under mesophilic conditions, continuous digesters were operated at different hydraulic retention times (HRT) (30, 20, 15 and 10 days) equivalent to organic loading rates (OLR) of 2.5, 3.7, 5.7 and 7.3 kg COD m-3 d-1, respectively. At HRTs of 30 and 20 days, steady state conditions were observed with methane yields of 0.984 ± 0.013 NL d-1 and 1.362 ± 0.018 NL d-1, respectively. The HRT of 15 days was found critical because of acids accumulation through the experiments. When the OLR of 5.7 kg COD m-3 d-1 was reached, methane production was found to be instable. Finally, at HRT of 10 days, a failure of the system was observed due to the washing of the methanogenic microorganisms. Regarding the degradability of the lignocellulosic fractions, the maximum reduction yields for hemicellulose and cellulose were noted for HRTs of 30 and 20 days, while lignin was not degraded throughout the different experiments. For an optimization of the process, HRT of 20 days can therefore be recommended for productive use in large-scale applications.
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Affiliation(s)
- Jean H El Achkar
- Univ. Bretagne Sud, FRE CNRS 3744, IRDL, F-56300 Pontivy, France; Centre d'Analyses et de Recherches, Unité de recherche Technologies et Valorisation Alimentaire, Faculté des Sciences, Université Saint-Joseph de Beyrouth, Beirut, Lebanon.
| | - Thomas Lendormi
- Univ. Bretagne Sud, FRE CNRS 3744, IRDL, F-56300 Pontivy, France
| | - Dominique Salameh
- Centre d'Analyses et de Recherches, Unité de recherche Technologies et Valorisation Alimentaire, Faculté des Sciences, Université Saint-Joseph de Beyrouth, Beirut, Lebanon
| | - Nicolas Louka
- Centre d'Analyses et de Recherches, Unité de recherche Technologies et Valorisation Alimentaire, Faculté des Sciences, Université Saint-Joseph de Beyrouth, Beirut, Lebanon
| | - Richard G Maroun
- Centre d'Analyses et de Recherches, Unité de recherche Technologies et Valorisation Alimentaire, Faculté des Sciences, Université Saint-Joseph de Beyrouth, Beirut, Lebanon
| | | | - Zeina Hobaika
- Centre d'Analyses et de Recherches, Unité de recherche Technologies et Valorisation Alimentaire, Faculté des Sciences, Université Saint-Joseph de Beyrouth, Beirut, Lebanon
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Gertner P, Huiliñir C, Pinto-Villegas P, Castillo A, Montalvo S, Guerrero L. A new model for including the effect of fly ash on biochemical methane potential. WASTE MANAGEMENT (NEW YORK, N.Y.) 2017; 68:232-239. [PMID: 28697963 DOI: 10.1016/j.wasman.2017.07.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2017] [Revised: 07/03/2017] [Accepted: 07/04/2017] [Indexed: 06/07/2023]
Abstract
The modelling of the effect of trace elements on anaerobic digestion, and specifically the effect of fly ash, has been scarcely studied. Thus, the present work was aimed at the development of a new function that allows accumulated methane models to predict the effect of FA on the volume of methane accumulation. For this, purpose five fly ash concentrations (10, 25, 50, 250 and 500mg/L) using raw and pre-treated sewage sludge were used to calibrate the new function, while three fly ash concentrations were used (40, 150 and 350mg/L) for validation. Three models for accumulated methane volume (the modified Gompertz equation, the logistic function, and the transfer function) were evaluated. The results showed that methane production increased in the presence of FA when the sewage sludge was not pre-treated, while with pretreated sludge there is inhibition of methane production at FA concentrations higher than 50mg/L. In the calibration of the proposed function, it fits well with the experimental data under all the conditions, including the inhibition and stimulating zones, with the values of the parameters of the methane production models falling in the range of those reported in the literature. For validation experiments, the model succeeded in representing the behavior of new experiments in both the stimulating and inhibiting zones, with NRMSE and R2 ranging from 0.3577 to 0.03714 and 0.2209 to 0.9911, respectively. Thus, the proposed model is robust and valid for the studied conditions.
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Affiliation(s)
- Pablo Gertner
- Departamento de Ingeniería Química, Universidad de Santiago de Chile, Santiago, Chile
| | - César Huiliñir
- Departamento de Ingeniería Química, Universidad de Santiago de Chile, Santiago, Chile.
| | - Paula Pinto-Villegas
- Departamento de Ingeniería Química, Universidad de Santiago de Chile, Santiago, Chile
| | - Alejandra Castillo
- Departamento de Ingeniería Química, Universidad de Santiago de Chile, Santiago, Chile
| | - Silvio Montalvo
- Departamento de Ingeniería Química, Universidad de Santiago de Chile, Santiago, Chile
| | - Lorna Guerrero
- Departamento de Ingeniería Química y Ambiental, Universidad Técnica Federico Santa Marıa, Valparaıso, Chile
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Amiri L, Abdoli MA, Gitipour S, Madadian E. The effects of co-substrate and thermal pretreatment on anaerobic digestion performance. ENVIRONMENTAL TECHNOLOGY 2017; 38:2352-2361. [PMID: 27841085 DOI: 10.1080/09593330.2016.1260643] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2016] [Accepted: 11/09/2016] [Indexed: 06/06/2023]
Abstract
UNLABELLED The influence of anaerobic co-digestion of leachate and sludge with organic fraction of municipal solid waste (OFMSW) under mesophilic condition in three batch digesters of 5 L capacity has been studied. OFMSW was mixed with leachate and sludge at three different ratios. Experimental results illustrated that the digester with a ratio of 2000/2500 (leachate (mL) or sludge/OFMSW (mL)) had significantly higher performance. Furthermore, this study compared the performance of anaerobic digestion of different substrates with three different mixing ratios with and without thermal pretreatment at low temperature (65°C) in terms of biogas production, chemical oxygen demand (COD) elimination as well as hydraulic retention time. In addition, to predict the biogas yield and evaluate the kinetic parameters, the modified Gompertz model was applied. Based on the results, the maximum biogas yield from adding different leachate and sludge ratios to OFMSW was recorded to be 0.45 and 0.38 m3 kg-1 COD which was higher about 7% in comparison with co-digestion original OFMSW without thermal pretreatment. In addition, thermal pretreatment accelerated the hydrolysis step. Moreover, the total COD elimination was relatively stable in the range of 52-60% at all types of substrate mixtures. Also, the modified Gompertz model demonstrated a good fit to the experimental results. ABBREVIATIONS AD: anaerobic digester; BOD: biochemical oxygen demand; COD: chemical oxygen demand; FAAS: flame atomic absorption spectroscopy; HS: high solids; HRT: hydraulic retention time; LS: low solids; MS: medium solids; OFMSW: organic fraction of municipal solid waste; TCD: thermal conductivity detector; TS: total solid; TSS: total suspended solids.
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Affiliation(s)
- Leyla Amiri
- a Department of Mining and Materials Engineering , McGill University , Montréal , Canada
- b Faculty of Environment, Department of Environmental Engineering , University of Tehran , Tehran , Iran
| | - Mohammad Ali Abdoli
- b Faculty of Environment, Department of Environmental Engineering , University of Tehran , Tehran , Iran
| | - Saeid Gitipour
- b Faculty of Environment, Department of Environmental Engineering , University of Tehran , Tehran , Iran
| | - Edris Madadian
- c Department of Bioresource Engineering , McGill University , Montréal , Canada
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Castro L, Escalante H, Jaimes-Estévez J, Díaz LJ, Vecino K, Rojas G, Mantilla L. Low cost digester monitoring under realistic conditions: Rural use of biogas and digestate quality. BIORESOURCE TECHNOLOGY 2017; 239:311-317. [PMID: 28531856 DOI: 10.1016/j.biortech.2017.05.035] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2017] [Revised: 05/05/2017] [Accepted: 05/06/2017] [Indexed: 06/07/2023]
Abstract
The purpose of this work was to assess the behaviour of anaerobic digestion of cattle manure in a rural digester under realistic conditions, and estimate the quality and properties of the digestate. The data obtained during monitoring indicated that the digester operation was stable without risk of inhibition. It produced an average of 0.85Nm3biogas/d at 65.6% methane, providing an energy savings of 76%. In addition, the digestate contained high nutrient concentrations, which is an important feature of fertilizers. However, this method requires post-treatment due to the presence of pathogens.
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Affiliation(s)
- L Castro
- Grupo de Investigación en Tecnologías de Valorización de Residuos y Fuentes Agrícolas e Industriales para la Sustentabilidad Energética (INTERFASE), Escuela de Ingeniería Química, Universidad Industrial de Santander, Carrera 27, Calle 9 Ciudad Universitaria, Bucaramanga, Colombia.
| | - H Escalante
- Grupo de Investigación en Tecnologías de Valorización de Residuos y Fuentes Agrícolas e Industriales para la Sustentabilidad Energética (INTERFASE), Escuela de Ingeniería Química, Universidad Industrial de Santander, Carrera 27, Calle 9 Ciudad Universitaria, Bucaramanga, Colombia
| | - J Jaimes-Estévez
- Grupo de Investigación en Tecnologías de Valorización de Residuos y Fuentes Agrícolas e Industriales para la Sustentabilidad Energética (INTERFASE), Escuela de Ingeniería Química, Universidad Industrial de Santander, Carrera 27, Calle 9 Ciudad Universitaria, Bucaramanga, Colombia
| | - L J Díaz
- Grupo de Investigación en Tecnologías de Valorización de Residuos y Fuentes Agrícolas e Industriales para la Sustentabilidad Energética (INTERFASE), Escuela de Ingeniería Química, Universidad Industrial de Santander, Carrera 27, Calle 9 Ciudad Universitaria, Bucaramanga, Colombia
| | - K Vecino
- Grupo de Investigación en Tecnologías de Valorización de Residuos y Fuentes Agrícolas e Industriales para la Sustentabilidad Energética (INTERFASE), Escuela de Ingeniería Química, Universidad Industrial de Santander, Carrera 27, Calle 9 Ciudad Universitaria, Bucaramanga, Colombia
| | - G Rojas
- Grupo de Investigación en Tecnologías de Valorización de Residuos y Fuentes Agrícolas e Industriales para la Sustentabilidad Energética (INTERFASE), Escuela de Ingeniería Química, Universidad Industrial de Santander, Carrera 27, Calle 9 Ciudad Universitaria, Bucaramanga, Colombia
| | - L Mantilla
- Grupo de Investigación en Tecnologías de Valorización de Residuos y Fuentes Agrícolas e Industriales para la Sustentabilidad Energética (INTERFASE), Escuela de Ingeniería Química, Universidad Industrial de Santander, Carrera 27, Calle 9 Ciudad Universitaria, Bucaramanga, Colombia
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129
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Rico C, Montes JA, Rico JL. Evaluation of different types of anaerobic seed sludge for the high rate anaerobic digestion of pig slurry in UASB reactors. BIORESOURCE TECHNOLOGY 2017; 238:147-156. [PMID: 28433902 DOI: 10.1016/j.biortech.2017.04.014] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2017] [Revised: 04/03/2017] [Accepted: 04/05/2017] [Indexed: 06/07/2023]
Abstract
Three different types of anaerobic sludge (granular, thickened digestate and anaerobic sewage) were evaluated as seed inoculum sources for the high rate anaerobic digestion of pig slurry in UASB reactors. Granular sludge performance was optimal, allowing a high efficiency process yielding a volumetric methane production rate of 4.1LCH4L-1d-1 at 1.5days HRT (0.248LCH4g-1COD) at an organic loading rate of 16.4gCODL-1d-1. The thickened digestate sludge experimented flotation problems, thus resulting inappropriate for the UASB process. The anaerobic sewage sludge reactor experimented biomass wash-out, but allowed high process efficiency operation at 3days HRT, yielding a volumetric methane production rate of 1.7LCH4L-1d-1 (0.236LCH4g-1COD) at an organic loading rate of 7.2gCODL-1d-1. To guarantee the success of the UASB process, the settleable solids of the slurry must be previously removed.
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Affiliation(s)
- Carlos Rico
- Department of Water and Environmental Science and Technologies, University of Cantabria, Avda. Los Castros, s/n, 39005 Santander, Spain.
| | - Jesús A Montes
- Department of Water and Environmental Science and Technologies, University of Cantabria, Avda. Los Castros, s/n, 39005 Santander, Spain
| | - José Luis Rico
- Department of Chemical and Process Engineering Resources, University of Cantabria, Avda. Los Castros, s/n, 39005 Santander, Spain
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130
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Three-stage anaerobic co-digestion of food waste and horse manure. Sci Rep 2017; 7:1269. [PMID: 28455509 PMCID: PMC5430929 DOI: 10.1038/s41598-017-01408-w] [Citation(s) in RCA: 58] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2016] [Accepted: 03/28/2017] [Indexed: 11/09/2022] Open
Abstract
A novel compact three-stage anaerobic digester (HM3) was developed to combine the advantages of high solids anaerobic digestion (AD) and wet AD for co-digestion of food waste and horse manure. By having three separate chambers in the three-stage anaerobic digester, three different functional zones were created for high-solids hydrolysis, acidogenesis and wet methanogenesis. The results showed that the functionalized partitioning in HM3 significantly accelerated the solubilization of solid organic matters and the formation of volatile fatty acids, resulting in an increase of 11~23% in methane yield. VS reduction in the HM3 presents the highest rate of 71% compared to the controls. Pyrosequencing analysis indicated that different microbial communities in terms of hydrolyzing bacteria, acidogenic bacteria and methanogenic archaea were selectively enriched in the three separate chambers of the HM3. Moreover, the abundance of the methanogenic archaea was increased by 0.8~1.28 times compared to controls.
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131
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Passos F, Ortega V, Donoso-Bravo A. Thermochemical pretreatment and anaerobic digestion of dairy cow manure: Experimental and economic evaluation. BIORESOURCE TECHNOLOGY 2017; 227:239-246. [PMID: 28038401 DOI: 10.1016/j.biortech.2016.12.034] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2016] [Revised: 12/07/2016] [Accepted: 12/09/2016] [Indexed: 06/06/2023]
Abstract
The aim of this study was to assess technically and economically the application thermochemical pretreatment in the anaerobic digestion of dairy cow manure. After selecting the optimum substrate to inoculum (S/I) ratio in a preliminary BMP test, the following tests compared 20 different pretreatment conditions varying temperature (100 and 37°C), exposure time (5 and 30min and 12 and 24h) and chemical doses (0.5, 2, 6 and 10% of HCl or NaOH). The highest value of maximum production rate was achieved at an S/I ratio of 0.25gVSsgVSi-1. The major improvements of the methane potential were 23.6% with 10% of NaOH at 100°C for 5min and 20.6% with 2% of HCl at 37°C. The technical-economic analysis showed that the implementation of neither thermal alkali nor thermal-acid pretreatment would be feasible and the conventional one-step anaerobic digestion outperforms both alternatives.
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Affiliation(s)
- Fabiana Passos
- Environmental and Chemical Technology Group, Department of Chemistry, Universidade Federal de Ouro Preto, 35400-000 Ouro Preto, Minas Gerais, Brazil
| | - Valentina Ortega
- Escuela de Ingeniería Bioquímica, Pontificia Universidad Católica de Valparaíso, Chile
| | - Andrés Donoso-Bravo
- Escuela de Ingeniería Bioquímica, Pontificia Universidad Católica de Valparaíso, Chile; INRIA-Chile, Avenida Apoquindo 2827, piso 12, Las Condes, Santiago, Chile.
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132
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Assessment of regional biomass as co-substrate in the anaerobic digestion of chicken manure: Impact of co-digestion with chicken processing waste, seagrass and Miscanthus. Biochem Eng J 2017. [DOI: 10.1016/j.bej.2016.11.008] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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133
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Riggio S, Torrijos M, Debord R, Esposito G, van Hullebusch ED, Steyer JP, Escudié R. Mesophilic anaerobic digestion of several types of spent livestock bedding in a batch leach-bed reactor: substrate characterization and process performance. WASTE MANAGEMENT (NEW YORK, N.Y.) 2017; 59:129-139. [PMID: 27836514 DOI: 10.1016/j.wasman.2016.10.027] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2016] [Revised: 09/27/2016] [Accepted: 10/20/2016] [Indexed: 06/06/2023]
Abstract
Spent animal bedding is a valuable resource for green energy production in rural areas. The properties of six types of spent bedding collected from deep-litter stables, housing either sheeps, goats, horses or cows, were compared and their anaerobic digestion in a batch Leach-Bed Reactor (LBR) was assessed. Spent horse bedding, when compared to all the other types, appeared to differ the most due to a greater amount of straw added to the litter and a more frequent litter change. Total solids content appeared to vary significantly from one bedding type to another, with consequent impact on the methane produced from the raw substrate. However, all the types of spent bedding had similar VS/TS (82.3-88.9)%, a C/N well-suited to anaerobic digestion (20-28, except that of the horse, 42) and their BMPs were in a narrow range (192-239NmLCH4/gVS). The anaerobic digestion in each LBR was stable and the pH always remained higher than 6.6 regardless of the type of bedding. In contrast to all the other substrates, spent goat bedding showed a stronger acidification resulting in a methane production lag phase. Finally, spent bedding of different origins reached, on average, (89±11)% of their BMP after 60days of operation. This means that this waste is well-suited for treatment in LBRs and that this is a promising process to recover energy from dry agricultural waste.
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Affiliation(s)
- S Riggio
- LBE, INRA, 102 avenue des Etangs, 11100 Narbonne, France; Department of Civil and Mechanical Engineering, University of Cassino and Southern Lazio, Via Di Biasio, 43, 03043 Cassino, FR, Italy; Université Paris-Est, Laboratoire Géomatériaux et Environnement (LGE), EA 4508, UPEM, 77454 Marne-la-Vallée, France.
| | - M Torrijos
- LBE, INRA, 102 avenue des Etangs, 11100 Narbonne, France.
| | - R Debord
- Naskeo Environnement, 52 rue Paul Vaillant Couturier, 92240 Malakoff, France.
| | - G Esposito
- Department of Civil and Mechanical Engineering, University of Cassino and Southern Lazio, Via Di Biasio, 43, 03043 Cassino, FR, Italy.
| | - E D van Hullebusch
- Université Paris-Est, Laboratoire Géomatériaux et Environnement (LGE), EA 4508, UPEM, 77454 Marne-la-Vallée, France.
| | - J P Steyer
- LBE, INRA, 102 avenue des Etangs, 11100 Narbonne, France.
| | - R Escudié
- LBE, INRA, 102 avenue des Etangs, 11100 Narbonne, France.
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134
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Xie S, Hai FI, Zhan X, Guo W, Ngo HH, Price WE, Nghiem LD. Anaerobic co-digestion: A critical review of mathematical modelling for performance optimization. BIORESOURCE TECHNOLOGY 2016; 222:498-512. [PMID: 27745967 DOI: 10.1016/j.biortech.2016.10.015] [Citation(s) in RCA: 73] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2016] [Revised: 10/02/2016] [Accepted: 10/04/2016] [Indexed: 06/06/2023]
Abstract
Anaerobic co-digestion (AcoD) is a pragmatic approach to simultaneously manage organic wastes and produce renewable energy. This review demonstrates the need for improving AcoD modelling capacities to simulate the complex physicochemical and biochemical processes. Compared to mono-digestion, AcoD is more susceptible to process instability, as it operates at a higher organic loading and significant variation in substrate composition. Data corroborated here reveal that it is essential to model the transient variation in pH and inhibitory intermediates (e.g. ammonia and organic acids) for AcoD optimization. Mechanistic models (based on the ADM1 framework) have become the norm for AcoD modelling. However, key features in current AcoD models, especially relationships between system performance and co-substrates' properties, organic loading, and inhibition mechanisms, remain underdeveloped. It is also necessary to predict biogas quantity and composition as well as biosolids quality by considering the conversion and distribution of sulfur, phosphorus, and nitrogen during AcoD.
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Affiliation(s)
- Sihuang Xie
- Strategic Water Infrastructure Laboratory, University of Wollongong, Wollongong, NSW 2522, Australia
| | - Faisal I Hai
- Strategic Water Infrastructure Laboratory, University of Wollongong, Wollongong, NSW 2522, Australia
| | - Xinmin Zhan
- Civil Engineering, College of Engineering and Informatics, National University of Ireland, Galway, Ireland
| | - Wenshan Guo
- Centre for Technologies in Water and Wastewater, University of Technology Sydney, Sydney, NSW 2007, Australia
| | - Hao H Ngo
- Centre for Technologies in Water and Wastewater, University of Technology Sydney, Sydney, NSW 2007, Australia
| | - William E Price
- Strategic Water Infrastructure Laboratory, University of Wollongong, Wollongong, NSW 2522, Australia
| | - Long D Nghiem
- Strategic Water Infrastructure Laboratory, University of Wollongong, Wollongong, NSW 2522, Australia.
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135
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Tampio E, Ervasti S, Paavola T, Rintala J. Use of laboratory anaerobic digesters to simulate the increase of treatment rate in full-scale high nitrogen content sewage sludge and co-digestion biogas plants. BIORESOURCE TECHNOLOGY 2016; 220:47-54. [PMID: 27566511 DOI: 10.1016/j.biortech.2016.08.058] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2016] [Revised: 08/10/2016] [Accepted: 08/13/2016] [Indexed: 06/06/2023]
Abstract
The aim of this study was to assess the effect of increasing feedstock treatment rate on the performance of full-scale anaerobic digestion using laboratory-scale reactors with digestate and feedstock from full-scale digesters. The studied nitrogen-containing feedstocks were i) a mixture of industrial by-products and pig slurry, and ii) municipal sewage sludge, which digestion was studied at 41 and 52°C, respectively. This study showed the successful reduction of hydraulic retention times from 25 and 20days to around 15days, which increased organic loading rates from 2 to 3.5kg volatile solids (VS)/m(3)d and 4 to 6kgVS/m(3)d. As a result, the optimum retention time in terms of methane production and VS removal was 10-15% lower than the initial in the full-scale digesters. Accumulation of acids during start-up of the co-digestion reactor was suggested to be connected to the high ammonium nitrogen concentration and intermediate temperature of 41°C.
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Affiliation(s)
- Elina Tampio
- Natural Resources Institute Finland (Luke), Bio-based Business and Industry, Tietotie 2 C, FI-31600 Jokioinen, Finland.
| | - Satu Ervasti
- Natural Resources Institute Finland (Luke), Bio-based Business and Industry, Tietotie 2 C, FI-31600 Jokioinen, Finland
| | - Teija Paavola
- Gasum Biovakka Ltd., Autokatu 8, FI-20380 Turku, Finland
| | - Jukka Rintala
- Tampere University of Technology, Department of Chemistry and Bioengineering, P.O. Box 541, FI-33101 Tampere, Finland
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136
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Khalil TM, Higgins SS, Ndegwa PM, Frear CS, Stöckle CO. Assessing the effect of different treatments on decomposition rate of dairy manure. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2016; 182:230-237. [PMID: 27479239 DOI: 10.1016/j.jenvman.2016.07.056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2016] [Revised: 07/14/2016] [Accepted: 07/17/2016] [Indexed: 06/06/2023]
Abstract
Confined animal feeding operations (CAFOs) contribute to greenhouse gas emission, but the magnitude of these emissions as a function of operation size, infrastructure, and manure management are difficult to assess. Modeling is a viable option to estimate gaseous emission and nutrient flows from CAFOs. These models use a decomposition rate constant for carbon mineralization. However, this constant is usually determined assuming a homogenous mix of manure, ignoring the effects of emerging manure treatments. The aim of this study was to measure and compare the decomposition rate constants of dairy manure in single and three-pool decomposition models, and to develop an empirical model based on chemical composition of manure for prediction of a decomposition rate constant. Decomposition rate constants of manure before and after an anaerobic digester (AD), following coarse fiber separation, and fine solids removal were determined under anaerobic conditions for single and three-pool decomposition models. The decomposition rates of treated manure effluents differed significantly from untreated manure for both single and three-pool decomposition models. In the single-pool decomposition model, AD effluent containing only suspended solids had a relatively high decomposition rate of 0.060 d(-1), while liquid with coarse fiber and fine solids removed had the lowest rate of 0.013 d(-1). In the three-pool decomposition model, fast and slow decomposition rate constants (0.25 d(-1) and 0.016 d(-1) respectively) of untreated AD influent were also significantly different from treated manure fractions. A regression model to predict the decomposition rate of treated dairy manure fitted well (R(2) = 0.83) to observed data.
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Affiliation(s)
- Tariq M Khalil
- Department of Biological Systems Engineering, Washington State University, Pullman, WA 99164, USA.
| | - Stewart S Higgins
- Department of Biological Systems Engineering, Washington State University, Pullman, WA 99164, USA
| | - Pius M Ndegwa
- Department of Biological Systems Engineering, Washington State University, Pullman, WA 99164, USA
| | - Craig S Frear
- Regenis Inc., 6920 Salashan Pkwy, Ferndale, WA 98248, USA
| | - Claudio O Stöckle
- Department of Biological Systems Engineering, Washington State University, Pullman, WA 99164, USA
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137
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Kafle GK, Chen L, Glaze B, Tindall T, Yadanaparthi SKR. Aerobic treatment of liquid swine manure using polymer: Evaluation for ammonia emissions reduction and nitrogen retention. ACTA ACUST UNITED AC 2016. [DOI: 10.1016/j.eaef.2016.01.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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138
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Ortega-Martinez E, Sapkaite I, Fdz-Polanco F, Donoso-Bravo A. From pre-treatment toward inter-treatment. Getting some clues from sewage sludge biomethanation. BIORESOURCE TECHNOLOGY 2016; 212:227-235. [PMID: 27107339 DOI: 10.1016/j.biortech.2016.04.049] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2016] [Revised: 04/09/2016] [Accepted: 04/11/2016] [Indexed: 06/05/2023]
Abstract
The conventional application of thermal pretreatment of sewage sludge has been to apply it prior to the anaerobic digestion. In this study, the thermal treatment of the digestate was assessed at lab-scale under several temperature and time conditions. Biochemical methane potential (BMP) tests were set up to evaluate the methane production kinetic by using the Gompertz modified and the first order equation. A full-scale digester evaluation was done by using the ADM1 model under different scenarios and by using the parameters drawn from the BMP tests. The best results were obtained at 180°C and 200°C both at 30min where an improvement of 50% in the methane yield in regards to raw digestate. Full-scale simulations show that a scenario with two anaerobic reactors with thermal inter-treatment would improve the methane production by 45% and 20% compared to conventional anaerobic digestion and pretreatments followed by anaerobic digestion, respectively.
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Affiliation(s)
- Eduardo Ortega-Martinez
- Escuela de Ingeniería Bioquímica, Pontificia Universidad Católica de Valparaíso (PUCV), Av. Brasil 2085, Valparaíso, Chile
| | - Ieva Sapkaite
- Department of Chemical Engineering and Environmental Technology, University of Valladolid, C/ Dr. Mergelina s/n, Valladolid, Spain
| | - Fernando Fdz-Polanco
- Department of Chemical Engineering and Environmental Technology, University of Valladolid, C/ Dr. Mergelina s/n, Valladolid, Spain
| | - Andres Donoso-Bravo
- Escuela de Ingeniería Bioquímica, Pontificia Universidad Católica de Valparaíso (PUCV), Av. Brasil 2085, Valparaíso, Chile; INRIA-Chile, Avenida Apoquindo 2827, Piso 12, Las Condes, Santiago, Chile.
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