العنوان البديل: Simulation of a double-effect mechanical vapor recompression sewage desalination technology process. (English)

المؤلفون: 王其玉, 肖小龙, 王硕硕, 白 章

المصدر: Experimental Technology & Management; Feb2024, Vol. 41 Issue 2, p172-179, 8p

الملخص (بالإنجليزية): [Objective] With rapid social and economic development, the consumption of industrial water has increased with the soaring production of corresponding wastewater. It is crucial to achieve reasonable water resource recovery. Mechanical vapor recompression (MVR) evaporation is a promising technology that is widely employed in sewage treatment processes. The MVR system utilizes the second steam latent heat for sewage evaporation and achieves stable operation characteristics. However, due to the diverse composition within varied scenarios and the different interactions of the saline wastewater, essential adjustments are required in the MVR wastewater treatment system, which significantly affects the sewage treatment performance and system energy efficiency. Therefore, it is necessary to comprehensively evaluate the material and energy flow characteristics for the alternative operating conditions. [Methods] In this study, a double-effect MVR configuration is developed that focuses on the desalination and resource recovery of oil and gas exploitation processes concomitant with wastewater. This system integrates the evaporation crystallization and salt separation processes, as well as the falling film evaporation and forced circulation evaporation technologies, to achieve multieffect evaporation and strengthen sewage concentration and crystallization. Meanwhile, waste heat recovery technology is applied to achieve system energy savings by using condensate water to preheat the fed sewage. With the assistance of the Aspen Plus platform, the MVR sewage treatment system simulation is implemented, and the system operation and water-salt separation principle were determined by the energy conservation and salt dissolution characteristics. Indicators such as sewage value resource recovery rate, energy consumption, and energy efficiency are adopted for the comprehensive evaluation of the system. In addition, a system-sensitive analysis is performed for the system off-design operation characteristics. [Results] The research findings can be summarized as follows: 1) Under the designed conditions, after crystallization evaporation, separation ratios of water purification and inorganic salt reach 90.0% and 38.6%, respectively, and the overall resource utilization of sewage reaches 86.7%. In addition, increasing the initial salt content of sewage is beneficial for promoting the recovery of inorganic salt resources, and no solid salt will be produced with a salt concentration below 4.4%. 2) Based on thermodynamic analysis, 94.0% of the steam heating heat is provided by the recovered secondary steam heat energy, which results in an evident system energy efficiency ratio (EER) of 15.5. The specific energy consumption rate for wastewater treatment is 212.2 kJ/kg, which realizes favorable thermodynamic economic performances and achieves reasonable energy saving and carbon reduction. 3) Based on the sensitivity analysis, the results indicate that the reduced evaporation pressure enhances heat transfer temperature difference and then promotes sewage resource recovery while leading to a decrease in the system EER. [Conclusions] Consequently, the smaller pressure ratio under the appropriate evaporator temperature difference condition contributes to improving the system's energy efficiency and reducing the specific energy consumption for wastewater treatment. These findings provide a reasonable reference to enhance the optimization of the MVR system and wastewater recovery in oilfield areas. [ABSTRACT FROM AUTHOR]

Abstract (Chinese): 该文基于Aspen Plus 化工流程模拟软件, 开展了基于双效机械蒸汽再压缩（MVR）的采出水脱盐 工艺流程模拟仿真, 以及系统运行热力特性分析。在设计工况下经过系统处理的污水净水分离率达到90.0%, 污水整体资源化利用率可达86.7%, 系统能效比和污水处理比能耗分别为15.5 和212.2 kJ/kg。结合系统变工 况特性和运行参数敏感性分析可知, 降低蒸发压力可提升污水资源回收量, 减小压比将有利于提高系统能效、 降低比能耗。通过MVR 污水脱盐系统的仿真建模, 探究了该工艺的能质转化特性, 为优化含盐污水处理方 案提供了参考. [ABSTRACT FROM AUTHOR]

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المؤلفون: 诸钱芬, 王硕硕

المصدر: Engineering Management & Technology Discussion; 2023, Vol. 5 Issue 22, p190-192, 3p

Abstract (Chinese): 顶管技术是一种先进的管道施工方法，广泛应用于市政给排水工程中。它通过利用现代机械设备和先进 的管道推进技术，实现地下管道的隧道化施工，具有许多优势。本文从顶管技术在市政给排水工程施工中的四个运用 价值入手，详细阐述和分析顶管技术在市政给排水工程施工中的有效应用，以供参考。 [ABSTRACT FROM AUTHOR]

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المؤلفون: 诸钱芬, 王硕硕

المصدر: Urban Architecture & Development; 2023, Vol. 4 Issue 14, p173-175, 3p

Abstract (Chinese): 海绵城市理念是一种可持续发展的城市规划和设计理念, 注重水资源保护、生态环境改善和灾害风险防 范. 在水厂设计中, 应用海绵城市理念可以提高水资源的管理效率, 保护生态环境, 提高供水系统的韧性与可持续 性, 以及提升居民的生活质量. 未来的水厂设计应积极采用海绵城市理念, 将其融入到规划和设计中, 以构建更加可 持续、安全和环保的供水系统, 实现城市水资源的充分利用和环境保护的目标. 本文从海绵城市理念概述入手, 分析 海绵城市理念在水厂设计中的应用以及该理念的具体运用措施, 以供参考. [ABSTRACT FROM AUTHOR]

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المؤلفون: (楚顺鹏), Shunpeng Chu, (王硕硕), Shuoshuo Wang, (张锐敏), Ruimin Zhang, (尹萌萌), Mengmeng Yin, (杨晓玉), Xiaoyu Yang, (史庆华), Qinghua Shi

المصدر: Food Quality & Safety; 2022, Vol. 6, p1-12, 12p

مصطلحات موضوعية: TRANSCRIPTOMES, METABOLOMICS, FRUIT quality, WATERMELONS, GENE expression

مستخلص: In this study, an integrated transcriptome and metabolome analysis was used to explore the molecular foundation of fruit quality in two parent lines of Citrullus lanatus with distinct flesh characteristics, including '14-1' (sweet, red, and soft) and 'W600' (bitter, light yellow, and firm), as well as the corresponding F1 population (bitter, light yellow, and firm). Numerous differentially expressed genes (DEGs) were identified in the fruit samples: 3766 DEGs for '14-1' vs. 'W600', 2767 for '14-1' vs. F1, and 1178 for F1 vs. 'W600' at the transition stage; and 4221 for '14-1' vs. 'W600', 2447 for '14-1' vs. F1, and 446 for F1 vs. 'W600' at the maturity stage. Weighted gene co-expression network analysis (WGCNA) revealed that a gene module including 1111 DEGs was closely associated with flesh taste and color, and another gene module including 1575 DEGs contributed significantly to flesh texture. The metabolomic results showed that there were 447 differential metabolites (DMs) for '14-1' vs. 'W600' fruits, 394 for '14-1' vs. F1, and 298 for F1 vs. 'W600' at the maturity stage. Combining WGNCA and metabolomic results, several DEGs and DMs were further identified as hub players in fruit quality formation: 6 DEGs with 4 DMs for flesh sweetness; 6 DEGs with 13 DMs for bitterness; 9 DEGs with 10 DMs for flesh color; and 9 DEGs with 4 DMs for flesh texture. Altogether, these observations not only expand our knowledge of the molecular basis of fruit quality in watermelon, but also provide potential targets for future watermelon improvement. [ABSTRACT FROM AUTHOR]

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العنوان البديل: Effects of exogenous 2,4-epibrassinolide on the growth and redox balance of cucumber seedlings under NaHCO3 stress. (English)

المؤلفون: 聂文婧, 王硕硕, 荆鑫, 巩彪, 魏珉, 杨凤娟, 李岩, 史庆华

المصدر: Yingyong Shengtai Xuebao; Mar2018, Vol. 29 Issue 3, p899-908, 10p

الملخص (بالإنجليزية): The effects of 0.2 μmol·L^-1 exogenous 2,4-epibrassinolide (EBR) on the growth and reactive oxygen species metabolism of cucumber seedlings ('Jinyan 4' cucumber) under salt-alkaline stress (30 mmol·L^-1 NaHCO3) were examined by hydroponics method. The results showed that NaHCO3 stress significantly induced production of O2-· and accumulation of H2O2 in leaves and roots, resulting in the increases of MDA content and electrolyte leakage. Under NaHCO3 stress, activities of superoxide dismutase, peroxidase, catalase, ascorbate peroxidase, dehydroascorbatereductase, monodehydrodroascorbate reductase, and glutathione reductase as well as contents of ascorbic acid and glutathione were firstly increased and then decreased with progress of stress time. Exogenous EBR application significantly increased the activities of antioxidant enzymes and contents of antioxidants as well as the ratio of AsA/DHA (dehydroascorbic acid) and GSH/GSSG (L-glutathione oxidized) in leaves and roots of cucumber under NaHCO3 stress. Such changes improved the redox hemostasis in plants, reduced the level of reactive oxygen species, and alleviated the membrane lipid peroxidation. Together, they increased the alkaline tolerance of cucumber seedlings. [ABSTRACT FROM AUTHOR]

Abstract (Chinese): 以'津研四号'黄瓜为试材,以30 mmol·L^-1 NaHCO3模拟盐碱环境,采用水培法研究了0.2 μmol·L^-1外源2,4表油菜素内酯(2,4-epibrassinolide,EBR)对盐碱胁迫下黄瓜幼苗生长和活性氧代谢的影响.结果表明: NaHCO3胁迫显著诱导了叶片及根系中O2-·的产生和H2O2的积累,导致丙二醛含量和电解质渗透率提高.NaHCO3胁迫下,超氧化物歧化酶、过氧化物酶、过氧化氢酶、抗坏血酸过氧化物酶、脱氢抗坏血酸还原酶、单脱氢抗坏血酸还原酶、谷胱甘肽还原酶活性及还原型抗坏血酸、还原型谷胱甘肽含量随胁迫时间延长呈现先升后降的趋势.外源EBR显著提高了NaHCO3胁迫下黄瓜叶片和根系中抗氧化酶活性、抗氧化物质的含量以及AsA/DHA(双脱氢抗坏血酸)和GSH/GSSG(氧化型谷胱甘肽)比值,维持了植株内的氧化还原平衡,降低了活性氧积累水平,缓解了膜脂过氧化,从而提高了黄瓜幼苗的盐碱耐受性. [ABSTRACT FROM AUTHOR]

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