LCA of comprehensive pig manure management incorporating integrated technology systems

Prapaspongsa, Trakarn; Christensen, Per; Schmidt, Jannick Højrup; Thrane, Mikkel

doi:10.1016/j.jclepro.2010.05.015

Cited by 97 publications

(47 citation statements)

References 38 publications

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“…To conduct a comprehensive environmental impact assessment, including the most common LCA categories such as global warming potential, it would require foreground inventory data on process-related emissions. Though recent studies on greenhouse gas emission from conventional swine manure treatment plants (Prapaspongsa et al, 2010;Riaño and García-González, 2015) and specific insect production systems (Oonincx and De Boer, 2012;Oonincx et al, 2010) provide initial indications on the possible nature and magnitude of such emissions, the biophysical context and metabolic processes on which emissions have been monitored did not accord with the experimental trials that our models are building on. Employing these reported emission factors in the current study was therefore considered incoherent and non-representative.…”

Section: Discussionmentioning

confidence: 99%

Pig manure treatment with housefly (Musca domestica) rearing – an environmental life cycle assessment

Roffeis

Muys

Almeida

et al. 2015

JIFF

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The largest portion of a product's environmental impacts and costs of manufacturing and use results from decisions taken in the conceptual design phase long before its market entry. To foster sustainable production patterns, applying life cycle assessment in the early product development stage is gaining importance. Following recent scientific studies on using dipteran fly species for waste management, this paper presents an assessment of two insect-based manure treatment systems. Considering the necessity of manure treatment in regions with concentrated animal operations, reducing excess manure volumes with the means of insects presents a potentially convenient method to combine waste reduction and nutrient recovery. An analytical comparison of rearing houseflies on fresh and pretreated pig manure is reported with reference to agricultural land occupation, water and fossil depletion potential. Based on ex-ante modelled industrial scale rearing systems, the driving factors of performance and environmentally sensitive aspects of the rearing process have been assessed. Expressed per kg manure dry matter reduction, the estimated agricultural land occupation varied between 1.4 and 2.7 m 2 yr, fossil depletion potential ranged from 1.9 to 3.4 kg oil eq and the obtained water depletion potential was calculated from 36.4 to 65.6 m 3 . System improvement potential was identified for heating related energy usage and water consumption. The geographical context and the utility of the co-products, i.e. residue substrates and insect products, were determined as influential variables to the application potential of this novel manure treatment concept. The results of this study, applied at the earliest stages of the design of the process, assist evaluation of the feasibility of such a system and provide guidance for future research and development activities.

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Section: Discussionmentioning

confidence: 99%

Pig manure treatment with housefly (Musca domestica) rearing – an environmental life cycle assessment

Roffeis

Muys

Almeida

et al. 2015

JIFF

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“…However, Chen et al [5] pointed out that only 19% of the RHB systems in China operate as designed. Lack of effective operational management and maintenance, and insufficient gas storage facilities, contribute to unstable operation and leakage of biogas-containing methane (CH 4 ) with a high global warming potential (GWP)-increasing net GHG emission [12]. Groenendaal et al [13] pointed out RHB neither reduced fossil energy consumption, nor lowered fertilizer application in a number of typical Chinese villages studied.…”

Section: Environmental Performancementioning

confidence: 99%

Greenhouse Gas Mitigation of Rural Household Biogas Systems in China: A Life Cycle Assessment

et al. 2017

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Rural household biogas (RHB) systems are at a crossroads in China, yet there has been a lack of holistic evaluation of their energy and climate (greenhouse gas mitigation) efficiency under typical operating conditions. We combined data from monitoring projects and questionnaire surveys across hundreds of households from two typical Chinese villages within a consequential life cycle assessment (LCA) framework to assess net GHG (greenhouse gas) mitigation by RHB systems operated in different contexts. We modelled biogas production, measured biogas losses and used survey data from biogas and non-biogas households to derive empirical RHB system substitution rates for energy and fertilizers. Our results indicate that poorly designed and operated RHB systems in northern regions of China may in fact increase farm household GHG emissions by an average of 2668 kg·CO 2 -eq·year −1 , compared with a net mitigation effect of 6336 kg·CO 2 -eq per household and year in southern regions. Manure treatment (104 and 8513 kg·CO 2 -eq mitigation) and biogas leakage (−533 and −2489 kg·CO 2 -eq emission) are the two most important factors affecting net GHG mitigation by RHB systems in northern and southern China, respectively. In contrast, construction (−173 and −305 kg·CO 2 -eq emission), energy substitution (−522 emission and 653 kg·CO 2 -eq mitigation) and nutrient substitution (−1544 and −37 kg·CO 2 -eq emission) made small contributions across the studied systems. In fact, survey data indicated that biogas households had higher energy and fertilizer use, implying no net substitution effect. Low biogas yields in the cold northern climate and poor maintenance services were cited as major reasons for RHB abandonment by farmers. We conclude that the design and management of RHB systems needs to be revised and better adapted to local climate (e.g., digester insulation) and household energy demand (biogas storage and micro power generators to avoid discharge of unburned biogas). More precise nutrient management planning could ensure that digestate nutrients are more effectively utilized to substitute synthetic fertilizers.

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“…NPP 0 values for calculating land tenure or land occupation requirements are from Haberl et al (2007) as shown in Table 2. Emission factors for nitrogen fertilisation and herbicide/pesticide applications are based on Prapaspongsa et al (2010) andIPCC (2006). Average GHG emissions of electricity production from the national grid are from Thai national LCI database (TGO, 2014a).…”

Section: Data Collectionmentioning

confidence: 99%

Risks of indirect land use impacts and greenhouse gas consequences: an assessment of Thailand's bioethanol policy

Prapaspongsa

Gheewala

2016

Journal of Cleaner Production

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LCA of comprehensive pig manure management incorporating integrated technology systems

Cited by 97 publications

References 38 publications

Pig manure treatment with housefly (Musca domestica) rearing – an environmental life cycle assessment

Pig manure treatment with housefly (Musca domestica) rearing – an environmental life cycle assessment

Greenhouse Gas Mitigation of Rural Household Biogas Systems in China: A Life Cycle Assessment

Risks of indirect land use impacts and greenhouse gas consequences: an assessment of Thailand's bioethanol policy

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