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Removal of Fe2+ in coastal aquaculture source water by manganese ores: Batch experiments and breakthrough curve modeling. 用锰矿去除沿海水产养殖源水中的 Fe2+:批量实验和突破曲线建模。
IF 2.5 4区 环境科学与生态学 Q3 ENGINEERING, ENVIRONMENTAL Pub Date : 2024-11-01 DOI: 10.1002/wer.11147
Jianhua Wang, Wenchao Feng, Jian Lu, Jun Wu, Wenxin Cao, Jianbai Zhang, Cui Zhang, Bing Hu, Wensheng Li

Excessive Fe2+ in coastal aquaculture source water will seriously affect the aquaculture development. This study used manganese sand to investigate the removal potential and mechanism of Fe2+ in coastal aquaculture source water by column experiments. The pseudo-first-order kinetic model could better describe Fe2+ removal process with R2 in the range of 0.9451-0.9911. More than 99.7% of Fe2+ could be removed within 120 min while the removal rate (k) was positively affected by low initial concentration of Fe2+, high temperature, and low pH. Logistic growth (S-shaped growth) model could better fit the concentration variation of Fe2+ in the effluent of the column (R2>0.99). The Fe2 breakthrough curve could be fitted by Bohart-Adams, Yoon-Nelson, and Thomas models (R2>0.95). Smooth slices with irregular shapes existed on the surface of manganese sand after the reaction while Fe content increased significantly on the surface of manganese sand after the column experiment. Moreover, FeO (OH) was mainly formed on the surface of manganese sand after the reaction. PRACTITIONER POINTS: Fe2+ in coastal aquaculture source water could be removed by manganese ores. The pseudo-first-order kinetic model better described the Fe2+ removal process. FeO (OH) was mainly formed on the surface of manganese sand after the reaction.

沿海养殖源水中过量的 Fe2+ 会严重影响水产养殖的发展。本研究利用锰砂,通过柱实验研究了近海养殖源水中Fe2+的去除潜力和机理。伪一阶动力学模型能较好地描述 Fe2+ 的去除过程,R2 在 0.9451-0.9911 之间。在 120 分钟内,99.7%以上的 Fe2+ 可被去除,而去除率(k)受低初始 Fe2+ 浓度、高温和低 pH 值的正向影响。Logistic 生长(S 型生长)模型能更好地拟合色谱柱出水中 Fe2+ 的浓度变化(R2>0.99)。Bohart-Adams、Yoon-Nelson 和 Thomas 模型可以拟合 Fe2 突破曲线(R2>0.95)。反应后锰砂表面出现了形状不规则的光滑切片,而柱实验后锰砂表面的铁含量显著增加。此外,反应后锰砂表面主要形成了 FeO(OH)。实践点:锰矿可去除沿海养殖源水中的 Fe2+。伪一阶动力学模型较好地描述了 Fe2+ 的去除过程。反应后锰砂表面主要形成 FeO(OH)。
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引用次数: 0
Chlormequat inhibits Vallisneria natans growth and shapes the epiphytic biofilm microbial community. 矮壮素能抑制 Vallisneria natans 的生长并形成附生生物膜微生物群落。
IF 2.5 4区 环境科学与生态学 Q3 ENGINEERING, ENVIRONMENTAL Pub Date : 2024-10-01 DOI: 10.1002/wer.11148
Zihang Ma, Dan Ai, Zuhan Ge, Tao Wu, Jibiao Zhang

Submerged macrophytes can overgrow and negatively affect freshwater ecosystems. This study aimed to investigate the use of chlormequat (CQ) to regulate submerged Vallisneria natans growth as well as its impact on the microbial community of epiphytic biofilms. V. natans height under CQ dosages of 20, 100, and 200 mg/L decreased within 21 days by 12.57%, 30.07%, and 44.62%, respectively, while chlorophyll content increased by 1.94%, 20.39%, and 38.83%. At 100 mg/L, CQ reduced the diversity of bacteria in the biofilm attached to V. natans leaves but increased the diversity of the eukaryotic microbial community. CQ strongly inhibited Cyanobacteria; compared with the control group, the treatment group experienced a significant reduction from 36.54% to 2.61%. Treatment significantly inhibited Gastrotricha and Rotifera, two dominant phyla of eukaryotes in the leaf biofilm, reducing their relative abundances by 17.41% and 6.48%, respectively. CQ significantly changed the leaf biofilm microbial community correlation network. The treatment group exhibited lower modularity (2.012) compared with the control group (2.249); however, the central network of the treated group contained a higher number of microbial genera (13) than the control group (4), highlighting the significance of eukaryotic genera in the network. The results obtained from this study provide invaluable scientific context and technical understanding pertinent to the restoration of submerged macrophytes within aquatic ecosystems. PRACTITIONER POINTS: Chlormequat reduced the plant height but increased leaf chlorophyll content. Chlormequat reduced biofilm bacterial diversity but increased eukaryotic diversity. Chlormequat affected the bacterial-fungal association networks in biofilms.

沉水大型藻类会过度生长并对淡水生态系统产生负面影响。本研究旨在调查使用矮壮素(CQ)调节沉水大叶女贞(Vallisneria natans)生长及其对附生生物膜微生物群落的影响。在 CQ 剂量为 20、100 和 200 mg/L 的条件下,V. natans 的高度在 21 天内分别下降了 12.57%、30.07% 和 44.62%,而叶绿素含量则分别增加了 1.94%、20.39% 和 38.83%。在 100 毫克/升的浓度下,CQ 会降低附着在 V. natans 叶片上的生物膜中细菌的多样性,但会增加真核微生物群落的多样性。CQ 对蓝藻有很强的抑制作用;与对照组相比,处理组的抑制率从 36.54% 显著下降到 2.61%。处理组明显抑制了叶片生物膜中的两个主要真核微生物门--胃孢子虫和轮虫,它们的相对丰度分别降低了 17.41% 和 6.48%。CQ 明显改变了叶片生物膜微生物群落相关网络。与对照组(2.249)相比,处理组的模块化程度(2.012)较低;然而,处理组的中心网络包含的微生物属数量(13 个)高于对照组(4 个),凸显了真核生物属在网络中的重要性。这项研究的结果为恢复水生生态系统中的沉水大型藻类提供了宝贵的科学背景和技术理解。实践点:矮壮素降低了植物高度,但增加了叶片叶绿素含量。百草枯降低了生物膜细菌的多样性,但增加了真核生物的多样性。毒死蜱会影响生物膜中的细菌-真菌关联网络。
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引用次数: 0
Synthesis of novel composite material with spent coffee ground biochar and steel slag zeolite for enhanced dye and phosphate removal. 用废咖啡粉生物炭和钢渣沸石合成新型复合材料,以增强染料和磷酸盐的去除效果。
IF 2.5 4区 环境科学与生态学 Q3 ENGINEERING, ENVIRONMENTAL Pub Date : 2024-10-01 DOI: 10.1002/wer.11137
Shazia Noorin, Tanushree Paul, Arnab Ghosh, Jurng-Jae Yee, Sung Hyuk Park

Rising concerns over water scarcity, driven by industrialization and urbanization, necessitate the need for innovative solutions for wastewater treatment. This study focuses on developing an eco-friendly and cost-effective biochar-zeolite composite (BZC) adsorbent using waste materials-spent coffee ground biochar (CGB) and steel slag zeolite (SSZ). Initially, the biochar was prepared from spent coffee ground, and zeolite was prepared from steel slag; their co-pyrolysis resulted in novel adsorbent material. Later, the physicochemical characteristics of the BZC were examined, which showed irregular structure and well-defined pores. Dye removal studies were conducted, which indicate that BZC adsorption reach equilibrium in 2 h, exhibiting 95% removal efficiency compared to biochar (43.33%) and zeolite (74.58%). Moreover, the removal efficiencies of the novel BZC composite toward dyes methyl orange (MO) and crystal violet (CV) were found to be 97% and 99.53%, respectively. The kinetic studies performed with the dyes and phosphate with an adsorbent dosage of 0.5 g L-1 suggest a pseudo-second-order model. Additionally, the reusability study of BZC proves to be effective through multiple adsorption and regeneration cycles. Initially, the phosphate removal remains high but eventually decreases from 92% to 70% in the third regeneration cycle, highlighting the robustness of the BZC. In conclusion, this study introduces a promising, cost-effective novel BZC adsorbent derived from waste materials as a sustainable solution for wastewater treatment. Emphasizing efficiency, reusability, and potential contributions to environmentally conscious water treatment, the findings highlight the composite's significance in addressing key challenges for the removal of toxic pollutants from the aqueous solutions. PRACTITIONER POINTS: A novel biochar-zeolite composite (BZC) material has been synthesized. Excellent removal of dyes by BZC (~95%) was achieved as compared to their counterparts The kinetic studies performed suggest a pseudo-second-order model. BZC proves to be highly effective for multiple adsorption studies. Excellent reusability showed potential as a robust adsorbent.

在工业化和城市化的推动下,人们对水资源短缺的担忧与日俱增,因此有必要寻找创新的废水处理解决方案。本研究的重点是利用废弃材料--咖啡渣生物炭(CGB)和钢渣沸石(SSZ),开发一种生态友好且经济高效的生物炭-沸石复合材料(BZC)吸附剂。最初,生物炭是用废咖啡粉制备的,而沸石则是用钢渣制备的。随后,对 BZC 的理化特性进行了研究,结果显示其结构不规则,孔隙清晰。染料去除研究表明,BZC 的吸附在 2 小时内达到平衡,与生物炭(43.33%)和沸石(74.58%)相比,去除率达到 95%。此外,新型 BZC 复合材料对染料甲基橙(MO)和水晶紫(CV)的去除率分别为 97% 和 99.53%。在吸附剂用量为 0.5 g L-1 时,对染料和磷酸盐进行的动力学研究表明,该模型为假二阶模型。此外,BZC 的可重复使用性研究证明,经过多次吸附和再生循环,BZC 是有效的。最初,磷酸盐的去除率仍然很高,但在第三个再生周期中,去除率最终从 92% 降至 70%,这凸显了 BZC 的稳健性。总之,本研究介绍了一种从废料中提取的前景广阔、经济高效的新型 BZC 吸附剂,它是一种可持续的废水处理解决方案。研究结果强调了该复合材料的高效性、可重复利用性以及对环保型水处理的潜在贡献,并强调了其在应对从水溶液中去除有毒污染物的关键挑战方面所具有的重要意义。实践点:合成了一种新型生物炭-沸石复合材料(BZC)。与同类材料相比,BZC 对染料的去除率极高(约 95%)。事实证明,BZC 对多重吸附研究非常有效。出色的可重复使用性显示了其作为一种坚固吸附剂的潜力。
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引用次数: 0
Understanding machine learning predictions of wastewater treatment plant sludge with explainable artificial intelligence. 用可解释人工智能理解污水处理厂污泥的机器学习预测。
IF 2.5 4区 环境科学与生态学 Q3 ENGINEERING, ENVIRONMENTAL Pub Date : 2024-10-01 DOI: 10.1002/wer.11136
Fuad Bin Nasir, Jin Li

This study investigates the use of machine learning (ML) models for wastewater treatment plant (WWTP) sludge predictions and explainable artificial intelligence (XAI) techniques for understanding the impact of variables behind the prediction. Three ML models, random forest (RF), gradient boosting machine (GBM), and gradient boosting tree (GBT), were evaluated for their performance using statistical indicators. Input variable combinations were selected through different feature selection (FS) methods. XAI techniques were employed to enhance the interpretability and transparency of ML models. The results suggest that prediction accuracy depends on the choice of model and the number of variables. XAI techniques were found to be effective in interpreting the decisions made by each ML model. This study provides an example of using ML models in sludge production prediction and interpreting models applying XAI to understand the factors influencing it. Understandable interpretation of ML model prediction can facilitate targeted interventions for process optimization and improve the efficiency and sustainability of wastewater treatment processes. PRACTITIONER POINTS: Explainable artificial intelligence can play a crucial role in promoting trust between machine learning models and their real-world applications. Widely practiced machine learning models were used to predict sludge production of a United States wastewater treatment plant. Feature selection methods can reduce the required number of input variables without compromising model accuracy. Explainable artificial intelligence techniques can explain driving variables behind machine learning prediction.

本研究调查了机器学习(ML)模型在污水处理厂(WWTP)污泥预测中的应用,以及可解释人工智能(XAI)技术对预测背后变量影响的理解。使用统计指标对随机森林(RF)、梯度提升机(GBM)和梯度提升树(GBT)这三种 ML 模型的性能进行了评估。通过不同的特征选择(FS)方法选择输入变量组合。采用了 XAI 技术来增强 ML 模型的可解释性和透明度。结果表明,预测精度取决于模型的选择和变量的数量。研究发现,XAI 技术可有效解释每个 ML 模型做出的决策。本研究提供了在污泥产量预测中使用 ML 模型的实例,并应用 XAI 对模型进行解释,以了解影响因素。对 ML 模型预测进行可理解的解释可促进对工艺优化进行有针对性的干预,并提高污水处理工艺的效率和可持续性。实践者观点:可解释的人工智能在促进机器学习模型与实际应用之间的信任方面发挥着至关重要的作用。广泛应用的机器学习模型被用于预测美国一家污水处理厂的污泥产量。特征选择方法可以在不影响模型准确性的情况下减少所需的输入变量数量。可解释的人工智能技术可以解释机器学习预测背后的驱动变量。
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引用次数: 0
Seasonal nitrogen removal in an outdoor microalgal polyculture at Nordic conditions. 北欧条件下室外微藻多元养殖的季节性脱氮。
IF 2.5 4区 环境科学与生态学 Q3 ENGINEERING, ENVIRONMENTAL Pub Date : 2024-10-01 DOI: 10.1002/wer.11142
Lina Mattsson, Hanna Farnelid, Maurice Hirwa, Martin Olofsson, Fredrik Svensson, Catherine Legrand, Elin Lindehoff

Microalgal solutions to clean waste streams and produce biomass were evaluated in Nordic conditions during winter, spring, and autumn in Southeast Sweden. The study investigated nitrogen (N) removal, biomass quality, and safety by treating industrial leachate water with a polyculture of local microalgae and bacteria in open raceway ponds, supplied with industrial CO2 effluent. Total N (TN) removal was higher in spring (1.5 g-2d-1), due to beneficial light conditions compared to winter and autumn (0.1 and 0.09 g-2d-1). Light, TN, and N species influenced the microalgal community (dominated by Chlorophyta), while the bacterial community remained stable throughout seasons with a large proportion of cyanobacteria. Winter conditions promoted biomass protein (19.6-26.7%) whereas lipids and carbohydrates were highest during spring (11.4-18.4 and 15.4-19.8%). Biomass toxin and metal content were below safety levels for fodder, but due to the potential presence of toxic strains, biofuels or fertilizer could be suitable applications for the algal biomass. PRACTITIONER POINTS: Microalgal removal of nitrogen from leachate water was evaluated in Nordic conditions during winter, spring, and autumn. Total nitrogen removal was highest in spring (1.5 g-2d-1), due to beneficial light conditions for autotrophic growth. Use of local polyculture made the cultivation more stable on a seasonal (light) and short-term (N-species changes) scale. Toxic elements in produced algal biomass were below legal thresholds for upcycling.

在瑞典东南部的冬季、春季和秋季,在北欧条件下对微藻清洁废物流和生产生物质的解决方案进行了评估。该研究调查了工业渗滤液的脱氮、生物质质量和安全性,方法是在开放式赛道池塘中利用当地微藻和细菌的多重培养来处理工业渗滤液水,并向其供应工业二氧化碳废水。与冬季和秋季(0.1 g-2d-1 和 0.09 g-2d-1)相比,由于光照条件良好,春季的总氮(TN)去除率更高(1.5 g-2d-1)。光照、TN 和氮的种类影响了微藻群落(以叶绿藻为主),而细菌群落在各个季节保持稳定,蓝藻占很大比例。冬季条件促进了生物量蛋白质(19.6-26.7%)的增加,而春季则以脂类和碳水化合物含量最高(分别为 11.4-18.4% 和 15.4-19.8%)。生物质毒素和金属含量低于饲料的安全水平,但由于可能存在有毒菌株,生物燃料或肥料可能是藻类生物质的合适用途。实践点:在北欧的冬季、春季和秋季,对微藻类去除渗滤液中的氮进行了评估。春季的总脱氮量最高(1.5 g-2d-1),这得益于有利于自养生长的光照条件。采用本地多培养方式使培养在季节(光照)和短期(氮种变化)范围内更加稳定。所产藻类生物量中的有毒元素低于可循环利用的法定阈值。
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引用次数: 0
Impact of organic matter constituents on phosphorus recovery from CPR sludges. 有机物成分对 CPR 污泥中磷回收的影响。
IF 2.5 4区 环境科学与生态学 Q3 ENGINEERING, ENVIRONMENTAL Pub Date : 2024-10-01 DOI: 10.1002/wer.11141
Aseel A Alnimer, D Scott Smith, Wayne J Parker

This study evaluated the influence of organic matter (OM) constituents on the potential for recovery of P from wastewaters when FeCl3 treatment is employed for P removal. The presence of OM constituents did not influence P release from Fe-P sludges when alkaline and ascorbic acid treatments were employed. However, the overall recovery of P from wastewater was impacted by the presence of selected OM constituents through the reduction of P uptake during coagulation. The presence of protein and humic matter showed remarkably low P removal values (3.0 ± 0.4% and 23 ± 1% respectively) when compared to an inorganic control recipe (62 ± 2%). Elevated soluble Fe (SFe) residuals in the presence of proteins (87 ± 5%) and humics (51 ± 1%) indicated interactions between Fe(III) cations and negatively charged functional groups like hydroxyl, carboxyl, and phenolic groups available in these organics. Significant negative correlations between P removal and residual SFe were observed suggesting Fe solubilization by OM constituents was the mechanism responsible for reduced P removal. The findings of this study identify, for the first time, the impact of OM constituents on overall P recovery when Fe(III) salts are employed and provide insights into recoveries that can be expected when Fe is added to primary, secondary treated, and industrial wastewaters. PRACTITIONER POINTS: Low P removal values were observed for protein and humic dominated wastewater recipes. Iron(III) solubilization counted for P removal reduction by proteins and humic acids. There is no effect of OM on P release from Fe-P sludge at pH 10 and ascorbic acid treatments. OM and agent employed to release P from sludges affected overall recovery of P.

本研究评估了在采用三氯化铁(FeCl3)处理去除 P 时,有机物(OM)成分对从废水中回收 P 的潜力的影响。在采用碱性和抗坏血酸处理时,有机物成分的存在不会影响铁-磷淤泥中 P 的释放。然而,由于某些 OM 成分的存在会在混凝过程中减少 P 的吸收,因此会影响废水中 P 的总体回收率。与无机对照配方(62 ± 2%)相比,蛋白质和腐殖质的存在显示出极低的磷去除率(分别为 3.0 ± 0.4% 和 23 ± 1%)。蛋白质(87 ± 5%)和腐殖质(51 ± 1%)存在时,可溶性铁(SFe)残留量升高,这表明铁(III)阳离子与这些有机物中的羟基、羧基和酚基等带负电荷的官能团之间存在相互作用。P 清除率与残留 SFe 之间呈显著负相关,表明有机物成分对铁的溶解是导致 P 清除率降低的机制。这项研究的结果首次确定了在使用铁(III)盐时有机物成分对总体磷回收率的影响,并为在一级、二级处理和工业废水中添加铁时可预期的回收率提供了启示。实践点:蛋白质和腐殖质为主的废水配方对 P 的去除率较低。蛋白质和腐殖酸对铁(III)的增溶作用可减少对 P 的去除。在 pH 值为 10 和抗坏血酸处理条件下,OM 对铁-磷污泥中的 P 释放没有影响。从污泥中释放 P 所使用的 OM 和药剂影响了 P 的总体回收率。
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引用次数: 0
Preparation of Co-Ce@RM catalysts for catalytic ozonation of tetracycline. 制备用于催化臭氧氧化四环素的 Co-Ce@RM 催化剂。
IF 2.5 4区 环境科学与生态学 Q3 ENGINEERING, ENVIRONMENTAL Pub Date : 2024-10-01 DOI: 10.1002/wer.11146
Wenquan Sun, Yiming Xie, Ming Zhang, Jun Zhou, Yongjun Sun

In this work, a Co-Ce@RM ozone catalyst was developed using red mud (RM), a by-product of alumina production, as a support material, and its preparation process, catalytic efficiency, and tetracycline (TCN) degradation mechanism were investigated. A comprehensive assessment was carried out using the 3E (environmental, economic, and energy) model. The optimal production conditions for Co-Ce@RM were as follows: The doping ratio of Co and Ce was 1:3, the calcination temperature was 400°C, and the calcination time was 5 h, achieving a maximum removal rate of 87.91% of TCN. The catalyst was characterized using different analytical techniques. Under the conditions of 0.4 L/min ozone aeration rate, with 9% catalyst loading and solution pH 9, the optimal removal rates and chemical oxygen demand by the Co-Ce catalytic ozonation at RM were 94.17% and 75.27%, respectively. Moreover, free radical quenching experiments showed that superoxide radicals (O2 -) and singlet oxygen (1O2) were the main active groups responsible for the degradation of TCN. When characterizing the water quality, it was assumed that TCN undergoes degradation pathways such as demethylation, dehydroxylation, double bond cleavage, and ring-opening reactions under the influence of various active substances. Finally, the 3E evaluation model was deployed to evaluate the Co-Ce@RM catalytic ozonation experiment of TCN wastewater. PRACTITIONER POINTS: The preparation of Co-Ce@RM provides new ideas for resource utilization of red mud. Catalytic ozonation by Co-Ce@RM can produce 1O2 active oxygen groups. The Co-Ce@RM catalyst can maintain a high catalytic activity after 20 cycles. The degradation pathway of the catalytic ozonation of tetracycline was fully analyzed. Catalytic ozone oxidation processes were evaluated by the "3E" (environmental, economic, and energy) model.

本研究以氧化铝生产过程中产生的副产品赤泥(RM)为支撑材料,开发了一种 Co-Ce@RM 臭氧催化剂,并对其制备工艺、催化效率和四环素(TCN)降解机理进行了研究。采用 3E(环境、经济和能源)模型进行了综合评估。Co-Ce@RM 的最佳生产条件如下:Co 和 Ce 的掺杂比例为 1:3,煅烧温度为 400°C,煅烧时间为 5 小时,TCN 的最大去除率为 87.91%。催化剂采用不同的分析技术进行了表征。在臭氧曝气速度为 0.4 L/min、催化剂负载量为 9%、溶液 pH 为 9 的条件下,Co-Ce 催化臭氧在 RM 条件下的最佳去除率和化学需氧量分别为 94.17% 和 75.27%。此外,自由基淬灭实验表明,超氧自由基(O2-)和单线态氧(1O2)是降解 TCN 的主要活性基团。在确定水质特征时,假定 TCN 在各种活性物质的影响下会经历脱甲基、脱羟基、双键裂解和开环反应等降解途径。最后,利用 3E 评估模型对 TCN 废水的 Co-Ce@RM 催化臭氧实验进行评估。实践要点:Co-Ce@RM 的制备为赤泥的资源化利用提供了新思路。Co-Ce@RM 催化臭氧可以产生 1O2 活性氧基团。Co-Ce@RM 催化剂在 20 次循环后仍能保持较高的催化活性。全面分析了催化臭氧氧化四环素的降解途径。通过 "3E"(环境、经济和能源)模型对催化臭氧氧化过程进行了评估。
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引用次数: 0
Enhancing efficiency and quality control: The impact of Digital Twins in drinking water networks. 提高效率和质量控制:数字双胞胎在饮用水网络中的影响。
IF 2.5 4区 环境科学与生态学 Q3 ENGINEERING, ENVIRONMENTAL Pub Date : 2024-10-01 DOI: 10.1002/wer.11139
Sergi Baena-Miret, Marta Alet Puig, Rafael Bardisa Rodes, Laura Bonastre Farran, Santiago Durán, Marta Ganzer Martí, Eduardo Martínez-Gomariz, Antonio Carrasco Valverde

This paper showcases the successful development and implementation of two Digital Twin prototypes within the Lab Digital Twins project, designed to enhance the efficiency and quality control of Aigües de Barcelona's drinking water network. The first prototype focuses on asset management, using (near) real-time data and statistical models, and achieving a 70% success rate in predicting pump station failures 137 days in advance. The second prototype addresses water quality monitoring, leveraging machine learning to accurately forecast trihalomethane levels at key points in the distribution system, and enabling proactive water quality management strategies, ensuring compliance with stringent safety standards and safeguarding public health. The paper details the methodology of both prototypes, highlighting their potential to revolutionize water network management. PRACTITIONER POINTS: Digital representation of assets and processes in the drinking water treatment network Early fault detection in assets, and predictions of trihalomethane formation in the drinking water distribution network Reduction on monitoring time and incident response for target assets by means of Digital Twins Improvement in visualization, prediction, and proactive measures for asset management and water quality control Contribution to the growing knowledge on Digital Twins and their potential to revolutionize water network operations.

本文展示了在实验室数字孪生项目中成功开发和实施的两个数字孪生原型,旨在提高 Aigües de Barcelona 饮用水网络的效率和质量控制。第一个原型侧重于资产管理,使用(接近)实时数据和统计模型,提前 137 天预测泵站故障的成功率达到 70%。第二个原型针对水质监测,利用机器学习准确预测配水系统关键点的三卤甲烷水平,并制定积极主动的水质管理策略,确保符合严格的安全标准,保障公众健康。本文详细介绍了这两个原型的方法论,强调了它们在彻底改变水网管理方面的潜力。实践点:对饮用水处理网络中的资产和流程进行数字表示 对资产中的故障进行早期检测,并预测饮用水输水管网中三卤甲烷的形成 通过数字孪生系统减少对目标资产的监控时间和事故响应 改善资产管理和水质控制的可视化、预测和主动措施 促进对数字孪生系统及其彻底改变水网运行的潜力的了解。
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引用次数: 0
Explainable artificial intelligence for the interpretation of ensemble learning performance in algal bloom estimation. 可解释人工智能用于解释藻华估计中的集合学习性能。
IF 2.5 4区 环境科学与生态学 Q3 ENGINEERING, ENVIRONMENTAL Pub Date : 2024-10-01 DOI: 10.1002/wer.11140
Jungsu Park, Byeongchan Seong, Yeonjeong Park, Woo Hyoung Lee, Tae-Young Heo

Chlorophyll-a (Chl-a) concentrations, a key indicator of algal blooms, were estimated using the XGBoost machine learning model with 23 variables, including water quality and meteorological factors. The model performance was evaluated using three indices: root mean square error (RMSE), RMSE-observation standard deviation ratio (RSR), and Nash-Sutcliffe efficiency. Nine datasets were created by averaging 1 hour data to cover time frequencies ranging from 1 hour to 1 month. The dataset with relatively high observation frequencies (1-24 h) maintained stability, with an RSR ranging between 0.61 and 0.65. However, the model's performance declined significantly for datasets with weekly and monthly intervals. The Shapley value (SHAP) analysis, an explainable artificial intelligence method, was further applied to provide a quantitative understanding of how environmental factors in the watershed impact the model's performance and is also utilized to enhance the practical applicability of the model in the field. The number of input variables for model construction increased sequentially from 1 to 23, starting from the variable with the highest SHAP value to that with the lowest. The model's performance plateaued after considering five or more variables, demonstrating that stable performance could be achieved using only a small number of variables, including relatively easily measured data collected by real-time sensors, such as pH, dissolved oxygen, and turbidity. This result highlights the practicality of employing machine learning models and real-time sensor-based measurements for effective on-site water quality management. PRACTITIONER POINTS: XAI quantifies the effects of environmental factors on algal bloom prediction models The effects of input variable frequency and seasonality were analyzed using XAI XAI analysis on key variables ensures cost-effective model development.

叶绿素-a(Chl-a)浓度是藻类大量繁殖的一个关键指标,该浓度是利用 XGBoost 机器学习模型估算的,该模型包含 23 个变量,其中包括水质和气象因素。模型性能采用三个指标进行评估:均方根误差(RMSE)、均方根误差-观测标准偏差比(RSR)和纳什-苏特克利夫效率。通过平均 1 小时的数据创建了 9 个数据集,时间频率从 1 小时到 1 个月不等。观测频率相对较高的数据集(1-24 小时)保持了稳定性,RSR 在 0.61 和 0.65 之间。然而,对于每周和每月间隔的数据集,模型的性能明显下降。沙普利值(SHAP)分析是一种可解释的人工智能方法,它的进一步应用提供了对流域环境因素如何影响模型性能的定量理解,同时也用于提高模型在现场的实际应用性。从 SHAP 值最高的变量到 SHAP 值最低的变量,构建模型的输入变量数量从 1 个依次增加到 23 个。在考虑了 5 个或更多变量后,模型的性能趋于稳定,这表明只需使用少量变量,包括 pH 值、溶解氧和浊度等实时传感器收集的相对容易测量的数据,就能实现稳定的性能。这一结果凸显了采用机器学习模型和基于传感器的实时测量来进行有效现场水质管理的实用性。实践点:XAI 量化了环境因素对藻华预测模型的影响 利用 XAI 分析了输入变量频率和季节性的影响,对关键变量的分析确保了模型开发的成本效益。
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引用次数: 0
An efficient water quality index forecasting and categorization using optimized Deep Capsule Crystal Edge Graph neural network. 利用优化的深度胶囊晶体边缘图神经网络进行高效的水质指数预测和分类。
IF 2.5 4区 环境科学与生态学 Q3 ENGINEERING, ENVIRONMENTAL Pub Date : 2024-10-01 DOI: 10.1002/wer.11138
Anusha Nanjappachetty, Suvitha Sundar, Nagaraju Vankadari, Tapas Bapu Bathey Ramesh Bapu, Pradeep Shanmugam

The world's freshwater supply, predominantly sourced from rivers, faces significant contamination from various economic activities, confirming that the quality of river water is critical for public health, environmental sustainability, and effective pollution control. This research addresses the urgent need for accurate and reliable water quality monitoring by introducing a novel method for estimating the water quality index (WQI). The proposed approach combines cutting-edge optimization techniques with Deep Capsule Crystal Edge Graph neural networks, marking a significant advancement in the field. The innovation lies in the integration of a Hybrid Crested Porcupine Genghis Khan Shark Optimization Algorithm for precise feature selection, ensuring that the most relevant indicators of water quality (WQ) are utilized. Furthermore, the use of the Greylag Goose Optimization Algorithm to fine-tune the neural network's weight parameters enhances the model's predictive accuracy. This dual optimization framework significantly improves WQI prediction, achieving a remarkable mean squared error (MSE) of 6.7 and an accuracy of 99%. By providing a robust and highly accurate method for WQ assessment, this research offers a powerful tool for environmental authorities to proactively manage river WQ, prevent pollution, and evaluate the success of restoration efforts. PRACTITIONER POINTS: Novel method combines optimization and Deep Capsule Crystal Edge Graph for WQI estimation. Preprocessing includes data cleanup and feature selection using advanced algorithms. Deep Capsule Crystal Edge Graph neural network predicts WQI with high accuracy. Greylag Goose Optimization fine-tunes network parameters for precise forecasts. Proposed method achieves low MSE of 6.7 and high accuracy of 99%.

世界淡水供应主要来自河流,面临着各种经济活动造成的严重污染,这表明河流水质对公众健康、环境可持续性和有效的污染控制至关重要。本研究通过引入一种估算水质指数(WQI)的新方法,满足了对准确可靠的水质监测的迫切需求。所提出的方法将最先进的优化技术与深度胶囊晶体边缘图神经网络相结合,标志着该领域的重大进展。其创新之处在于整合了混合凤头猪成吉思汗鲨优化算法,用于精确选择特征,确保利用最相关的水质(WQ)指标。此外,使用灰雁优化算法对神经网络的权重参数进行微调,也提高了模型的预测准确性。这种双重优化框架极大地改进了水质指数预测,实现了 6.7 的显著均方误差 (MSE) 和 99% 的准确率。这项研究为水质评估提供了一种稳健、高精度的方法,为环境部门主动管理河流水质、预防污染和评估修复工作的成功与否提供了有力的工具。实践点:新方法结合了优化和深度胶囊晶体边缘图来估算水质指数。预处理包括使用先进算法进行数据清理和特征选择。深度胶囊晶体边缘图神经网络可高精度预测 WQI。灰雁优化微调网络参数,实现精确预测。所提出的方法实现了 6.7 的低 MSE 和 99% 的高准确率。
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引用次数: 0
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Water Environment Research
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