Results 11 to 20 of about 235,216 (168)

植物碳源对人工湿地脱氮过程的影响

open access: yesGongye shui chuli, 2021
碳源不足已成为人工湿地脱氮受限的重要因素。植物材料因富含丰富的纤维素,且成本低廉、可再生,在自然环境中可广泛获取,具有作为外加碳源应用于人工湿地脱氮过程中的潜力。为研究添加植物碳源对人工湿地脱氮过程的影响,选取3种常见植物材料作为潜在碳源,探究其释放特性,并作为外加碳源,研究在不同条件下对人工湿地脱氮效果和N2O的释放量的影响。研究结果表明:植物材料可以很好地释放有机碳,其累积释碳量为119.78~172.84 mg/g,添加植物碳源进行人工湿地试验,HRT为3 d、碳氮比为6、温度为30 ℃时 ...
许兵, 张旭, 刘佳, 成小翔
doaj  

考虑梯级碳交易机制和电转气两阶段运行的综合能源系统优化 [PDF]

open access: yes全球能源互联网, 2023
为提升综合能源系统(integrated energy system,IES)的能效水平,提出了一种考虑梯级碳交易机制和电转气(power-to-gas,P2G)两阶段运行的IES调度模型。首先引入碳捕获与封存技术(carbon capture and storage,CCS),解决了P2G所需碳源和热电联产机组的碳排放问题;同时在传统P2G的基础上引入氢燃料电池,研究P2G两阶段运行的多重效益;最后,运用梯级碳交易机制限制碳排放。在此基础上,建立以碳交易成本、系统运行成本 ...
李贵君   +4 more
doaj   +1 more source

碳源对除磷颗粒污泥除污效能和微生物特性的影响

open access: yesGongye shui chuli, 2023
采用厌氧-好氧间歇运行模式,在SBR反应器中分别以丙酸钠、乙酸钠、葡萄糖、蔗糖为单一碳源对生物除磷颗粒污泥进行培养驯化,并考察不同碳源下除磷颗粒污泥对水中磷的去除效果,同时结合高通量测序,探究不同碳源驯化的生物除磷颗粒污泥中微生物种群结构的变化情况。结果证明:碳源为丙酸钠时,系统对磷的去除效果最佳。高通量测序结果表明:碳源对除磷颗粒污泥的微生物种群结构影响显著,以丙酸钠为碳源的颗粒污泥中聚磷菌(PAOs)占比最高;以乙酸钠为碳源的颗粒污泥聚糖菌(GAOs)占比最高;以蔗糖为碳源的颗粒污泥PAOs含量最低,
相延铮, 何成达, 朱腾义, 何瑜
doaj  

考虑互联协同的分布式能源站低碳多目标选址规划研究 [PDF]

open access: yes全球能源互联网
“双碳”目标和能源转型的大背景下,区域综合能源系统内部耦合关系不断丰富,对于碳排放的管理不断严格,考虑互联协同的分布式能源站低碳规划问题亟待解决。为此,首先讨论了互联协同分布式能源站空间性能参数矩阵;然后计及负荷-能源站的管线建设以及环境成本、能源站-能源站的互联管线长度、各个分布式能源站规划容量等关键因素,提出了一种考虑互联协同的分布式能源站低碳多目标选址规划模型;最后,讨论了负荷不确定性对分布式能源站选址规划的影响,并且基于基准负荷确定性场景 ...
江城   +6 more
doaj   +1 more source

跨国电网互联情景下的碳流及碳减排效益研究—以非洲能源互联网为例

open access: yes全球能源互联网, 2019
全球能源系统正在经历转型,未来的能源体系中将以清洁能源和电力为主导,因此有必要研究一套针对清洁能源电力的碳减排核算方法。在传统“碳流”概念的基础上,针对清洁能源电力提出了广义碳流概念,以此引申定义了电网互联情景下的负碳流,并提出了消费侧视角下包含多种能源的电力系统碳排放核算方法。基于碳流工具,能够从消费侧精确评估电网互联下的清洁电力输送的减排效益。以非洲跨国电网互联情景为例,非洲通过洲内电网互联促进清洁电力输送,至2030年总的“负碳流”为2700万t CO2/年;至2050年“负碳流”可达8700万t
谭新   +5 more
doaj   +1 more source

电-氢-碳耦合促进新能源基地开发模式研究 [PDF]

open access: yes全球能源互联网
实现全球“碳中和”,核心是推动能源绿色低碳转型,重要举措是推动新能源大规模基地化开发和高效消纳。针对偏远、水电不足地区新能源基地开发面临的低碳调节手段不足、电网配置和消纳能力有限、“风光火”开发模式降碳难等问题与挑战,提出了基于电-氢-碳协同的新能源基地发展思路和开发模式,将氢基产业发展与新能源开发消纳、煤电灵活低碳转型深度融合,同时结合绿氢、绿氨、绿色甲醇等氢基产品制取工艺的技术发展和调节能力提升,量化分析绿电与绿色氢/氨/甲醇在终端消费市场的竞争力及经济效益 ...
刘泽洪   +4 more
doaj   +1 more source

Conservative roots confer a larger microbial carbon pump efficacy than acquisitive roots by regulating microbial life‐history strategy

open access: yesFunctional Ecology, EarlyView.
Read the free Plain Language Summary for this article on the Journal blog. Abstract Root activity creates unique microbial hotspots in the rhizosphere by influencing the metabolic activities of surrounding soil microorganisms, profoundly regulating the dynamics of soil organic carbon (SOC). However, how root economic strategies affect the formation and
Qiyu Tan   +8 more
wiley   +1 more source

Comprehensive framework for assessing and optimizing existing research networks

open access: yesConservation Biology, EarlyView.
Abstract Conservation, monitoring, and research networks, or collections of ecological research sites unified under a common mission of data collection or a research mission, are essential infrastructure for understanding large landscapes. However, most networks developed opportunistically over decades rather than through systematic design, creating ...
Alyson East   +2 more
wiley   +1 more source

Scientists’ warning on the global destruction of rock outcrop ecosystems

open access: yesConservation Biology, EarlyView.
Abstract Rock outcrops are geological formations that harbor a highly specialized biota adapted to harsh environmental conditions that differ from their surrounding landscapes. They are globally distributed, especially in old, highly weathered landscapes, and can function as habitat islands containing high levels of endemism and distinct evolutionary ...
Luiza F. A. de Paula   +19 more
wiley   +1 more source

Millimeter/Nano‐Structured Metal Monolithic Catalysts: A Privileged Opportunity for Sustainable Water Purification

open access: yesRare Metals, Volume 45, Issue 6, June 2026.
ABSTRACT Cross‐scale assembly of metal (sub) nanoparticles and/or single atoms into millimeter/nanostructured metal monolithic catalysts (Min‐SMCs) is highly appealing for sustainable water cleanup, due to energy‐efficient catalyst recyclability, high infrastructure compatibility, and low metal‐releasing risks.
Jia‐Cheng E. Yang   +4 more
wiley   +1 more source

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