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Unlocked disinfection by-product formation potential upon exposure of swimming pool water to additional

Alvyn P. Berg, Ting-An Fang, Hao L. Tang

《环境科学与工程前沿（英文）》 2019年第13卷第1期 doi: 10.1007/s11783-019-1098-3

摘要：

• Swimming pool water was studied for DBPs upon exposure to additional stimulants.

• DBP formation could be induced by residual chlorine and extended incubation.

• Urine led to a massive formation of chloroform with additional stimulants.

• Reactions between chlorine and anthropogenic organics were slow and long-lasting.

• Urine control and air ventilation should be on the priority list for pool management.

关键词： Trihalomethanes Haloacetic acids Chloroform Residual chlorine Anthropogenic organics Swimming pool water

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Dewatering of Scenedesmus Obliquus Cultivation Substrate with Microfiltration: Potential and Challengesfor Water Reuse and Effective Harvesting

Marco Malaguti,Lorenzo Craveri,Francesco Ricceri,Vincenzo Riggio,Mariachiara Zanetti,Alberto Tiraferri,

《工程（英文）》 doi: 10.1016/j.eng.2023.07.010

摘要： In the microalgae harvesting process, which includes a step for dewatering the algal suspension, directly reusing extracted water in situ would decrease the freshwater footprint of cultivation systems. Among various algae harvesting techniques, membrane-based filtration has shown numerous advantages. This study evaluated the reuse of permeate streams derived from Scenedesmus obliquus (S. obliquus) biomass filtration under bench-scale and pilot-scale conditions. In particular, this study identified a series of challenges and mechanisms that influence the water reuse potential and the robustness of the membrane harvesting system. In a preliminary phase of this investigation, the health status of the initial biomass was found to have important implications for the harvesting performance and quality of the permeate stream to be reused; healthy biomass ensured better dewatering performance (i.e., higher water fluxes) and higher quality of the permeate water streams. A series of bench-scale filtration experiments with different combinations of cross-flow velocity and pressure values were performed to identify the operative conditions that would minimize energy requirements while maximizing water productivity. The optimal conditions, 2.2 m·s⁻¹ and 1.4 bar (1 bar = 10⁵ Pa), respectively, were then applied to drive pilot-scale microfiltration tests to reuse the collected permeate as a new cultivation medium for S. obliquus growth in a pilot-scale photo-bioreactor. The investigation revealed key differences between the behavior of the membrane systems at the two scales (bench and pilot). It indicated the potential for beneficial reuse of the permeate stream as the pilot-scale experiments ensured high harvesting performance and growth rates of biomass in permeate water that were highly similar to those recorded in the ideal cultivation medium. Finally, different nutrient reintegration protocols were investigated, revealing that both macro- and micronutrient levels are critical for the success of the reuse approach.

关键词： Scenedesmus obliquus Microfiltration Permeate reuse Harvesting Microalgae Pilot-scale

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河南省节水潜力及实施半旱地农业可行性研究

黄修桥,王景雷

《中国工程科学》 2012年第14卷第3期页码 46-53

摘要：

在收集整理河南省水资源开发利用现状和节水农业发展等资料的基础上，综合考虑工程措施、农艺措施和管理措施等的影响，分析了河南省不同水平年可能达到的节水潜力，并就河南省实施半旱地农业的可行性进行了分析，提出了河南省不同分区发展半旱地农业的具体技术措施。

关键词：节水潜力半旱地农业河南省

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水稻节水灌溉及其对环境的影响

茆智

《中国工程科学》 2002年第4卷第7期页码 8-16

摘要：

水稻是中国最主要的粮食作物之一，其产量约占粮食作物总产量的40%；在全国约11×108hm2的粮食作物总面积中，稻田面积约占28%。20世纪80年代以来，水稻产区的水资源短缺已成为当地农业生产中的重要问题，各地试验、开发、应用与推广了许多种水稻节水灌溉模式。文章根据这些新的水稻灌溉模式试验结果与推广经验，将我国水稻节水灌溉主要模式归纳为浅、湿、晒结合，间歇淹水，半旱栽培和蓄雨型等4类。阐述了这些模式的田间水分控制标准以及节水、增产和提高水分生产率的潜力；提出了该4类模式的选择原则以及应用这些模式时应注意的问题；分析、讨论了推广这些模式能够持续节水与提高水分生产率的机理以及对环境的影响。

关键词：水稻节水灌溉灌溉模式节水潜力环境影响

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Potential shift of bacterial community structure and corrosion-related bacteria in drinking water distributionpipeline driven by water source switching

Yue Hu, Ding Dong, Kun Wan, Chao Chen, Xin Yu, Huirong Lin

《环境科学与工程前沿（英文）》 2021年第15卷第2期 doi: 10.1007/s11783-020-1320-3

摘要： Abstract • Bacterial release from aged pipe sections under extreme conditions was quantified. • Released bacterial community structure exhibited large variation after transition. • Risks from transition reduced significantly with cleaner source. As a result of pollution in the present water sources, cities have been forced to utilize cleaner water sources. There are few reports regarding the potential shift of bacterial community structure driven by water source switching, especially that of corrosion-related bacteria. Three types of finished water were used for simulation, the polluted source water from the Qiantang and Dongtiaoxi Rivers (China) was replaced by cleaner water from Qiandao Lake (China). Here, we discussed the transition effects through three simulated reactors. The bacterial characteristics were identified using the high-throughput sequencing and heterotrophic plate count method. It was observed that the level of culturable bacteria declined by 2–3 orders of magnitude after water source switching. The bacterial community released from the pipeline reactor was significantly different under different finished water, and it exhibited large variation at the genus level. Porphyrobacter (58.2%) and Phreatobacter (14.5%) clearly replaced Novosphingobium, Aquabacterium, and Cupriavidus as new dominant genera in system A, which could be attributed to the lower carbon and nitrogen content of the new water source. Although corrosion-inhibiting bacteria decreased after switching, they still maintained dominant in three reactors (6.6%, 15.9%, and 19.7%). Furthermore, potential opportunistic pathogens such as Sphingomonas were detected. Our study shows that after transition to a high quality water source, the total culturable bacteria released was in a downtrend, which leads to a great reduction in the risk of bacterial leakage in the produced drinking water.

关键词： Drinking water biosafety Water source switching Drinking water distribution system Transition effects High-throughput sequencing

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面向 2050 年我国农业资源平衡与国际进口潜力研究

郑海霞,尤飞,罗其友,唐华俊

《中国工程科学》 2022年第24卷第1期页码 20-28 doi: 10.15302/J-SSCAE-2022.01.003

摘要：

受农业高质量发展、食物消费结构转型升级、气候变化的多重影响，我国农业资源供需平衡日益趋紧，因而统筹利用国际国内两种资源、两个市场，保障我国中长期粮食安全至关重要。本文在对比分析国内、国际农业资源的基础上，研究了我国2035 年和2050 年的粮食消费需求、消费结构、供给结构，分析了未来农业资源供需缺口以及虚拟水、虚拟耕地的可进口潜力与进口来源地，据此展望了我国农业水土资源利用的目标。研究表明：我国虚拟耕地进口将在2048 年前后达到峰值，需进口虚拟耕地近6.147×10⁷ hm²；虚拟水进口量在2045 年前后达到峰值，虚拟水进口量为1.136×10⁸ m³（以蓝水估算），约为2017 年全国农业总用水量的30%；可增加的耕地进口潜力主要来自南美洲和非洲。

关键词：农业资源平衡食物消费结构虚拟水虚拟耕地进口潜力

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数字水务进展以及从汽车和飞机工业自动化发展中汲取的经验教训 Review

Dragan Savić

《工程（英文）》 2022年第9卷第2期页码 35-41 doi: 10.1016/j.eng.2021.05.013

摘要：

提供水务服务和涉水卫生服务是一项全球性关键挑战。水务设施服务和废水设施服务具有规模性、复杂性和关键性等特点，使其在规划和管理方面变得极为困难。数字化革命已深入人类生活的许多领域，水务行业也开始从数字化转型中受益。有效利用气象遥感和土壤湿度数据可以提高灌溉效率（即粮食产量），利用人工智能可以更好地检测管道网络的异常和故障，利用自然启发式优化方法可以改善系统的管理和规划，以及数字孪生和机器人技术的频繁利用，所有这些都展现了数字化技术在改善复杂水务系统管理上的巨大潜力。但是，这些技术也有附加风险，如网络安全风险、不正当使用、过度信任数字解决方案与自动化的性能和准确度等。本文明确了水务行业数字化技术的主要进展，并将取证工程原则应用到一些在自动化和数字化转型较为领先的领域，对其故障事件进行分析。新型数字化技术失误是引发汽车和飞机行业重大事故的潜在原因（如特斯拉自动驾驶汽车和波音737 MAX飞机），确定失误原因并将经验应用于水务行业的类似风险识别中，吸取教训，避免失败。重要发现表明：①自动化要求在回路系统配置人员；②人工操作者必须充分掌握技术，并接受技术培训；③在发生技术故障时，应当采取应急式人工干预；④虽然冗余传感器会增加成本，但能减少由传感器读数失误带来的风险；⑤必须考虑网络安全风险；⑥鉴于水务系统的自动化和互联性不断增强，必须考虑相关伦理问题。这些发现也指出了与水务行业数字化转型相关的主要研究领域。

关键词：数字化自动化水行行业潜在风险经验教训

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Comparison of prechilling stratification and sulfuric acid scarification on seed germination of

Nan WANG, Jing GAO, Suiqi ZHANG, Feng YAN

《农业科学与工程前沿（英文）》 2017年第4卷第2期页码 220-227 doi: 10.15302/J-FASE-2017146

摘要： In semi-arid regions of the Loess Plateau, water deficiency restricts plant performance. (switchgrass), which is a highly versatile grass, had been introduced to the Plateau as a restoration species. To determine if prechilling stratification (PCS) and sulfuric acid scarification (SAS) can optimize establishment, cvs Pathfinder, Trailblazer and Alamo were tested under different ambient water potentials by measuring germination and root and shoot growth along water potential gradients under laboratory conditions. Both PCS and SAS improved total germination percentage (TGP), with PCS being more beneficial. The effect of PCS and SAS on mean germination time (MGT) weakened gradually with increasing drought stress. Both PCS and SAS showed no obvious effect on promoting root and shoot growth. Both PCS and SAS reduced base water potential requirement for reaching 50% germination of Pathfinder and Trailblazer, with this effect greater for PCS. These results indicate that embryo dormancy may be a major factor limiting germination of under drought conditions. Pathfinder appears to be more suitable for a semi-arid environment, whereas Alamo appears to be unsuitable for drought conditions. Given the large difference between predicted value and measured value, the reliability and applicable scope of linear regression estimated Y needs further investigation, specification and optimization.

关键词： base water potential data analysis method embryo growth germination

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partial root-zone irrigation with high irrigation frequency improves root growth and reduces unproductive water

Shaoqing DU, Ling TONG, Shaozhong KANG, Fusheng LI, Taisheng DU, Sien LI, Risheng DING

《农业科学与工程前沿（英文）》 2018年第5卷第2期页码 188-196 doi: 10.15302/J-FASE-2017176

摘要： Alternate partial root-zone irrigation (APRI) can improve water use efficiency in arid areas. However, the effectiveness and outcomes of different frequencies of APRI on water uptake capacity and physiological water use have not been reported. A two-year field experiment was conducted with two irrigation amounts (400 and 500 mm) and three irrigation methods (conventional irrigation, APRI with high and low frequencies). Root length density, stomatal conductance, photosynthetic rate, transpiration rate, leaf water use efficiency, midday stem and leaf water potentials were measured. The results show that in comparison with conventional irrigation, APRI with high frequency significantly increased root length density and decreased water potentials and stomatal conductance. No differences in the above indicators between the two APRI frequencies were detected. A significantly positive relationship between stomatal conductance and root length density was found under APRI. Overall, alternate partial root-zone irrigation with high frequency has a great potential to promote root growth, expand water uptake capacity and reduce unproductive water loss in the arid apple production area.

关键词： alternate partial root-zone irrigation apple tree leaf water use efficiency root length density stomatal conductance water potential

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黄淮海地区农业节水对策及实施半旱地农业可行性研究

山仑,吴普特 , 康绍忠, 冯浩 , 张岁岐

《中国工程科学》 2011年第13卷第4期页码 37-42

摘要：

通过系统调研，从挖掘各类农业水资源潜力入手，分析总结了黄淮海地区农业节水的成效、经验与存在的问题，认为在充分利用降水基础上实施补充少量灌溉水的半旱地农业是解决该区域水资源严重短缺，同时实现农业生产可持续增长的一条重要出路。旱地农业、灌溉农业和半旱地农业并存将成为未来农业用水的新格局，按此对策实施，预期到2020年，该地区农田灌溉用水量可减少30 %以上，并率先实现农业用水系统的现代化。

关键词：黄淮海地区农业节水半旱地农业水资源潜力

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Energy neutrality potential of wastewater treatment plants: A novel evaluation framework integrating

《环境科学与工程前沿（英文）》 2022年第16卷第9期 doi: 10.1007/s11783-022-1549-0

摘要：

• Framework of indicators was established based on energy efficiency and recovery.

关键词： Wastewater treatment plants Energy neutrality potential Energy efficiency Energy recovery Evaluation framework

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Global warming potential associated with Irish milk powder production

William Finnegan, Jamie Goggins, Aksana Chyzheuskaya, Xinmin Zhan

《环境科学与工程前沿（英文）》 2017年第11卷第3期 doi: 10.1007/s11783-017-0949-z

摘要： Climate change is an ever growing issue and a major concern worldwide. Both producers and processors need to address the issue now by reducing their carbon footprint. Additionally, if Ireland is to meet their climate and energy targets, as outlined in Food Harvest 2020, which outlines a range of objectives for the Irish agricultural sector, the efficient use of resources and fuels within the industry will need to be increased. In Ireland, agriculture accounts for 29.2% of the total greenhouse gas emissions (58.5 million tonnes CO eq). Therefore, in this paper, a single agri-food product, milk powder, is examined in order to estimate the global warming potential (GWP) associated with its manufacture using life cycle assessment. A cradle-to-processing factory gate analysis, which includes raw milk production, raw milk transportation to the processing factory, its processing into each product and product packaging, is assessed in this study using data collected circa 2013. The factories surveyed processed approximately 24% of the total raw milk processed in the Republic of Ireland in 2013, which was 5.83 billion liters. The average total GWP associated with the manufacture of milk powder is 9.731 kg CO eq·kg milk powder, which has a standard deviation of 2.26 kg CO eq·kg milk powder, for the life cycle stages analyzed in this study. The most significant contributor to GWP is raw milk production (84%), followed by dairy processing (14%), with the remainder of the life cycle stages contributing approximately 2%.

关键词： Dairy Global warming potential Ireland Life cycle assessment Milk powder Milk production

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Assessing the potential of crop residue recycling in China and technology options based on a bottom-up

Lili QU,Tianzhu ZHANG,Wei LU

《环境科学与工程前沿（英文）》 2014年第8卷第4期页码 570-579 doi: 10.1007/s11783-013-0604-2

摘要： Crop residues are an important biomass, and are significant in the sustainable development of China. This paper uses the Grey-Markov modeling approach, the cost-benefit analysis method, and the constraint optimization method to establish the potential of crop residue recycling in China (CRRC) using a bottom-up analysis. Taking 2010 as the baseline year, the CRRC model is used to determine the quantity trends of crop residue resources, simulating the recycling potential and selecting key crop residue recycling technologies for operation between 2010 and 2030. The results illustrate that the total residue output from different crops will gradually increase to 1062 million tons in 2030. The proportion of crop residue for field burning is expected to decrease as a result of guidance and support from the government. Market mechanisms are also improving the development of the crop residue recycling industry. The economic benefit of crop residue recycling is expected to be worth 132 billion CNY in 2030 according to technology structure options. Key crop residue recycling technologies preferred such as liquefaction, amination, silo, co-firing straw power and composting will account for more than 85% of the total benefits.

关键词： China crop residue recycling potential technology options

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柱形地形上单浮体的辐射和散射问题

吴必军,郑永红,游亚戈,孙晓燕,陈勇

《中国工程科学》 2004年第6卷第2期页码 48-55

摘要：

在有限水深、同轴但半径大于或等于浮体半径的圆柱体障碍物地形条件下，基于特征函数展开法，推导了垂直放置的圆柱形浮体由于波的辐射和散射作用所表现的动力学和运动学特征表达式，涉及浮体做垂荡、横荡和横摇运动所产生的辐射势，以及在入射波的作用下，由于浮体固定不动而产生的散射势，并推导了激励力、附加质量和阻尼系数表达式。采用与同轴、同半径圆柱体障碍物地形上单浮体水动力学特性相比的方式和激励力计算两种方法验证了推导的表达式，最后分析了障碍物几何尺寸对浮体水动力学特性的特有影响。

关键词：解析方法速度势波浪力

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Breeding strategies for increasing yield potential in super hybrid rice

Shihua CHENG,Xiaodeng ZHAN,Liyong CAO

《农业科学与工程前沿（英文）》 2015年第2卷第4期页码 277-282 doi: 10.15302/J-FASE-2015081

摘要： Super hybrid rice breeding is a new breeding method combining semi-dwarf breeding and heterosis breeding using germplasm and gene-environment interactions. This paper reviews the breeding strategies of super hybrid rice breeding in China, focusing on the utilization of heterosis of indica and japonica subspecies, construction of ideal plant architecture and pyramiding of disease resistant genes in restorer lines. To develop super hybrid rice, considerable effort should be made to explore genes related with high yield, good quality, resistance to pests and diseases, tolerance to stresses. Molecular breeding methods in combination with crossing techniques should be adopted in super hybrid rice breeding.

关键词： super hybrid rice breeding strategies yield potential

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标题作者时间类型操作

Unlocked disinfection by-product formation potential upon exposure of swimming pool water to additional

Alvyn P. Berg, Ting-An Fang, Hao L. Tang

期刊论文

Dewatering of Scenedesmus Obliquus Cultivation Substrate with Microfiltration: Potential and Challengesfor Water Reuse and Effective Harvesting

Marco Malaguti,Lorenzo Craveri,Francesco Ricceri,Vincenzo Riggio,Mariachiara Zanetti,Alberto Tiraferri,

期刊论文

河南省节水潜力及实施半旱地农业可行性研究

黄修桥,王景雷

期刊论文

水稻节水灌溉及其对环境的影响

茆智

期刊论文

Potential shift of bacterial community structure and corrosion-related bacteria in drinking water distributionpipeline driven by water source switching

Yue Hu, Ding Dong, Kun Wan, Chao Chen, Xin Yu, Huirong Lin

期刊论文

面向 2050 年我国农业资源平衡与国际进口潜力研究

郑海霞,尤飞,罗其友,唐华俊

期刊论文

数字水务进展以及从汽车和飞机工业自动化发展中汲取的经验教训

Dragan Savić

期刊论文

Comparison of prechilling stratification and sulfuric acid scarification on seed germination of

Nan WANG, Jing GAO, Suiqi ZHANG, Feng YAN

期刊论文

partial root-zone irrigation with high irrigation frequency improves root growth and reduces unproductive water