Frontiers of Agricultural Science and Engineering最新文献

{"title":"EFFICIENT CONTAMINANT REMOVAL FROM LIQUID DIGESTATE OF PIG MANURE BY CHEMICAL PRECIPITATION AND CO$lt;inf$gt;2$lt;/inf$gt; MINERALIZATION USING ALKALINE ASH","authors":"Zhengxin FEI, Zijie DING, Xuan ZHENG, Liang FENG, Qingyao HE, Shuiping YAN, Long JI","doi":"10.15302/j-fase-2023480","DOIUrl":"https://doi.org/10.15302/j-fase-2023480","url":null,"abstract":"<List> <ListItem><ItemContent> ● LFD was treated by fly ash-based chemical precipitation and CO₂ mineralization. </ItemContent></ListItem> <ListItem><ItemContent> ● > 93% COD and > 98% TP removal efficiency, and < 2 mS·cm⁻¹ EC was achieved. </ItemContent></ListItem> <ListItem><ItemContent> ● COD and TP removal was achieved by co-precipitation during CO₂ mineralization. </ItemContent></ListItem> <ListItem><ItemContent> ● CO₂ mineralization neutralized the alkaline LFD and removed heavy met. </ItemContent></ListItem></List> Chemical precipitation is a widely applied approach for a liquid fraction of digestate (LFD) of agricultural waste but its large-scale application requires low-cost and efficient precipitating agents and novel process design. This study evaluated novel approach for the efficient removal of contaminants from the LFD using fly ash-based chemical precipitation, followed by filtration and CO₂ mineralization. The technical feasibility of this approach was evaluated using pH and electrical conductivity (EC), and removal efficiencies of total phosphorus (TP), chemical oxygen demand (COD) and heavy metals during the treatment. The fly ash used in this study showed a promising performance as a chemical precipitation agent for COD and TP removal from the treated LFD involving complex effects of precipitation and adsorption. CO₂ bubbling after fly ash-based chemical precipitation provided further COD and TP removal by carbonation reactions between CO₂ and the excessive alkaline minerals in fly ash. Although addition of fly ash to untreated LFD increased pH from 8.3 to 12.9 and EC from 7.01 to 13.7 mS·cm⁻¹, CO₂ bubbling helped neutralize the treated LFD and reduce the EC, and concentrations of toxic ions by carbonation reactions. The fly ash-based chemical precipitation and CO₂ mineralization had > 93% COD and > 98% TP removal efficiencies, and resulted in an EC of < 2 mS·cm⁻¹ and a neutral pH in the treated LFD, as well as the high purity calcite product.","PeriodicalId":12565,"journal":{"name":"Frontiers of Agricultural Science and Engineering","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135440795","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"STRATEGIES FOR A LOW-CARBON FOOD SYSTEM IN CHINA","authors":"X. Jin, Xiangwen Fan, Yuanchao Hu, Zhaohai Bai, MA Lin","doi":"10.15302/j-fase-2023494","DOIUrl":"https://doi.org/10.15302/j-fase-2023494","url":null,"abstract":"In China, there has been insufficient study of whole food system greenhouse gas (GHG) accounting, which limits the development of mitigation strategies and may preclude the achievement of carbon peak and carbon neutrality goals. The paper presents the development of a carbon extension of NUFER (NUtrient flows in Food chain, Environment and Resources use model), a food system GHG emission accounting model that covers land use and land-use change, agricultural production, and post-production subsectors. The spatiotemporal characteristics of GHG emissions were investigated for the Chinese food system (CFS) from 1992 to 2017, with a focus on GHG emissions from the entire system. The potential to achieve a low-carbon food system in","PeriodicalId":12565,"journal":{"name":"Frontiers of Agricultural Science and Engineering","volume":"1 1","pages":""},"PeriodicalIF":3.7,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67330597","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"GREENHOUSE GAS AND AMMONIA EMISSION MITIGATION PRIORITIES FOR UK POLICY TARGETS","authors":"Sarah Buckingham, C. Topp, Peter Smith, V. Eory, David R. Chadwick, Christina K. Baxter, J. Cloy, Shaun Connolly, Emily C. Cooledge, Nicholas Cowan, J. Drewer, Colm Duffy, Naomi J. Fox, Asma Jebari, Becky Jenkins, D. Krol, K. Marsden, G. McAuliffe, Steven J. Morrison, Vincent O'Flaherty, Rachael Ramsey, Karl G. Richards, Rainer Roehe, Jo Smith, Kate Smith, Taro Takahashi, R. Thorman, John Williams, Jeremy Wiltshire, Robert M. Rees","doi":"10.15302/j-fase-2023495","DOIUrl":"https://doi.org/10.15302/j-fase-2023495","url":null,"abstract":"ABSTRACT Agriculture is essential for providing food and maintaining food security while concurrently delivering multiple other ecosystem services. However, agricultural systems are generally a net source of greenhouse gases and ammonia. They, therefore, need to substantively contribute to climate change mitigation and net zero ambitions. It is widely acknowledged that there is a need to further reduce and mitigate emissions across sectors, including agriculture to address the climate emergency and emissions gap. This discussion paper outlines a collation of opinions from a range of experts within agricultural research and advisory roles following a greenhouse gas and ammonia emission mitigation workshop held in the UK in March 2022. The","PeriodicalId":12565,"journal":{"name":"Frontiers of Agricultural Science and Engineering","volume":"1 1","pages":""},"PeriodicalIF":3.7,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67330843","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Sustainable Plasticulture in Chinese Agriculture: a Review of Challenges and Routes to Achieving Long-term Food and Ecosecurity","authors":"Samuel J. Cusworth, William J. Davies, M. McAinsh, Carly J. Stevens, Weilu Wang","doi":"10.15302/j-fase-2023508","DOIUrl":"https://doi.org/10.15302/j-fase-2023508","url":null,"abstract":"ABSTRACT Plastic pollution is global concern, affecting most aspects of global food production systems. Plasticulture, a practice used in agriculture to improve crop quality and quantity, among other factors, is a significant source of plastic pollution. This review examines the extent of plasticulture in China, the implications of the practice across decades of use and the legislative instruments used to resolve those issues. It briefly assesses the effectiveness of these policies and proposes possible future innovations to promote increases in long-term food and eco-security, where sustainable plasticulture is a key agent for change. While plasticulture has increased agricultural","PeriodicalId":12565,"journal":{"name":"Frontiers of Agricultural Science and Engineering","volume":"1 1","pages":""},"PeriodicalIF":3.7,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67330900","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Developing a new agenda for increased food and climate security","authors":"","doi":"10.15302/j-fase-2023514","DOIUrl":"https://doi.org/10.15302/j-fase-2023514","url":null,"abstract":"","PeriodicalId":12565,"journal":{"name":"Frontiers of Agricultural Science and Engineering","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135360881","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"GREENHOUSE GAS EMISSIONS FROM LIVESTOCK IN CHINA AND MITIGATION OPTIONS WITHIN THE CONTEXT OF CARBON NEUTRALITY","authors":"","doi":"10.15302/j-fase-2023486","DOIUrl":"https://doi.org/10.15302/j-fase-2023486","url":null,"abstract":"","PeriodicalId":12565,"journal":{"name":"Frontiers of Agricultural Science and Engineering","volume":"1 1","pages":""},"PeriodicalIF":3.7,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67330105","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"EFFECT OF EXOGENOUS ADDITIVES ON HEAVY METAL PASSIVATION AND NITROGEN RETENTION IN PIG MANURE COMPOSTING","authors":"Ziqi Wang, Guotao Sun, Jiamin Wang, Gongshe Yang","doi":"10.15302/j-fase-2023487","DOIUrl":"https://doi.org/10.15302/j-fase-2023487","url":null,"abstract":"ABSTRACT The widespread use of feed additives in intensive and large-scale pig farming has resulted in high levels of heavy metals in pig manure. The long-term application of organic fertilizers containing high levels of heavy metals leads to the accumulation of heavy metals in the soil, which not only causes heavy metal pollution in the soil, and also affect food safety and endanger human health. Composting is an economical and effective technical measures to achieve environmentally-sustainable treatment of pig manure and is a practical method to reduce the problem of heavy metals and to improve the resource value of pig manure. The composting process is accompanied by high temperatures and the production and emission of gases, and also lead to changes in the nitrogen content of the compost and provide opportunity for heavy metal passivation additives. This paper summarizes the forms and types of heavy metals present in pig manure and reviews the progress of research as well as the techniques and problems of in the composting process, and provides recommendations for research on heavy metal passivation and nitrogen retention in pig manure composting.","PeriodicalId":12565,"journal":{"name":"Frontiers of Agricultural Science and Engineering","volume":"1 1","pages":""},"PeriodicalIF":3.7,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67330174","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"SIMULATION OF O2-BLOWN CO-GASIFICATION OF WOOD CHIP AND-POTATO PEEL FOR PRODUCING SYNGAS","authors":"","doi":"10.15302/j-fase-2023490","DOIUrl":"https://doi.org/10.15302/j-fase-2023490","url":null,"abstract":"","PeriodicalId":12565,"journal":{"name":"Frontiers of Agricultural Science and Engineering","volume":"1 1","pages":""},"PeriodicalIF":3.7,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67330374","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Multiple Pollutants from Crop and Livestock Production in the Yangtze River: Status and Challenges","authors":"","doi":"10.15302/j-fase-2023511","DOIUrl":"https://doi.org/10.15302/j-fase-2023511","url":null,"abstract":"","PeriodicalId":12565,"journal":{"name":"Frontiers of Agricultural Science and Engineering","volume":"1 1","pages":""},"PeriodicalIF":3.7,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67331062","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"AMMONIA DISPERSION FROM MULTI-FLOOR VERSUS STANDARD SINGLE-FLOOR PIG PRODUCTION FACILITIES BASED ON COMPUTATIONAL FLUID DYNAMICS SIMULATIONS","authors":"Yicong XIN, Li RONG, Gunther SCHAUBERGER, Dejia LIU, Xiusong LI, Zhihua YANG, Songming ZHU, Dezhao LIU","doi":"10.15302/j-fase-2023501","DOIUrl":"https://doi.org/10.15302/j-fase-2023501","url":null,"abstract":"","PeriodicalId":12565,"journal":{"name":"Frontiers of Agricultural Science and Engineering","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135401066","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}