Environmental Technology and Innovation最新文献

{"title":"Biodegradation of microcystin using free and alginate-immobilized Stenotrophomonas geniculate DMC-X3 bacterium","authors":"Wanxin Xie, Botao Li, Jieni Qu, Xiaoting Zhou, Siyin Su, Caiming Wu, Hong Xu","doi":"10.1016/j.eti.2023.103440","DOIUrl":"https://doi.org/10.1016/j.eti.2023.103440","url":null,"abstract":"The eutrophication of water bodies and global warming have led to frequent cyanobacterial blooms, producing large quantities of algal toxins, which are released into water bodies, posing a threat to human health. Among known algal toxins, microcystin (MC) is the most harmful and most commonly detected. Because of its stable chemical structure, it is difficult to degrade MC though chemical and physical methods. Hence, effectively removing MC from water and ensuring water safety have become urgent issues. In this study, strain DMC-X3, which could rapidly and efficiently degrade MC, was isolated from a reservoir affected by a Microcystis aeruginosa bloom and identified as Stenotrophomonas geniculate. Inoculated at OD600=0.1, strain DMC-X3 degraded 70% of 1000 μg/L MC in 24 h, and over 90% within 48 h. When the inoculation density was increased to OD600=0.35, this bacterial strain completely degraded 1000 μg/L MC in 16 h and 5000 μg/L MC in 96 h. DMC-X3 maintained its MC degradation ability under the environmental conditions of pH 5–11 and 15–35°C. After 60 d of storage at room temperature, DMC-X3 embedded and immobilized on sodium alginate pellets showed 90% degradation of 200 μg/L MC in 48 h, and the pellets could be used for at least three cycles. Sustained-release pellets made by embedding and immobilizing both the degradation bacteria DMC-X3 and algicidal substance prodigiosin on sodium alginate effectively eradicated M. aeruginosa cells and degraded MC, promising a good application prospect in controlling M. aeruginosa blooms.","PeriodicalId":11899,"journal":{"name":"Environmental Technology and Innovation","volume":"14 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135565142","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Nutritional ingredients and fertilizer potential of the dewatering effluent after sludge wet air oxidation","authors":"Jiayi Liu, Lin Wang, Debin Li, Huan Li","doi":"10.1016/j.eti.2023.103443","DOIUrl":"https://doi.org/10.1016/j.eti.2023.103443","url":null,"abstract":"Wet air oxidation (WAO) is an effective technology for sludge treatment, and the treated sludge was mechanically dewatered to generate sludge cake and filtrate effluent. The sludge cake can be used as a soil conditioner or sent to landfills, but the effluent is usually sent back to wastewater treatment plants with nutrient waste. In this study, we proposed to use the effluent to process water-soluble organic fertilizer and analyzed its characteristics systematically and its effect on seed germination. The results showed that humic acid, protein, and polysaccharide were decomposed in different degrees in WAO with a chemical oxygen demand (COD) removal rate of 60%–70%. After a WAO treatment at 240°C, phosphorus, potassium, and heavy metals remained in the solid phase. At the same time, the effluent contained ammonium of more than 2800 mg/L, amino acids of nearly 3000 mg/L, humic acid derivatives of 2400 mg/L, and acetic acid of 3900 mg/L. Acetic acid was helpful in seed germination, while the other components were critical to root growth. The diluted effluent significantly prompted the germination and development of three kinds of plant seeds, particularly Spring Onion, with a germination index exceeding 200%.","PeriodicalId":11899,"journal":{"name":"Environmental Technology and Innovation","volume":"3 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135566418","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Emission characteristics of typical gas pollutants during oxygen-enriched waste incineration process","authors":"Wei Liao, Xiong Zhang, Zhe Fu, Shihong Zhang, Jingai Shao, Haiping Yang, Xianhua Wang, Hanping Chen","doi":"10.1016/j.eti.2023.103358","DOIUrl":"https://doi.org/10.1016/j.eti.2023.103358","url":null,"abstract":"Oxygen-enriched waste incineration can improve incineration efficiency and reduce pollutant generation, while greenhouse gases and pollutant emission characteristics of different wastes are still unclear. In this study, pollutant emission characteristics of actual municipal solid waste (MSW) and typical components at different oxygen concentrations and moisture content were investigated to reveal the pollutant generation mechanism. The results illustrated that when oxygen concentrations increased from 21% to 30%, CO, CH4 and HCN emissions decreased by 95%, 95.5% and 96.5%, respectively. NO emissions increased by 75% due to the promotion of oxygen on fuel NO and rapid NO. The slight increase in SO2 (from 25.8% to 26.87%) was due to the promotion of oxygen on organic S and the reaction between SO42− and HCl. The decrease in HCl emissions (from 78.42% to 76.85%) was caused by the increasing deacon reaction. Besides, with increasing moisture content, CO, CH4 and HCN generation decreased first because of the CO oxidation and CH4 reforming reaction, and then increased due to the water-gas reaction between fixed carbon and water. Furthermore, the moisture content contained (66%) would promote NO and HCl generation by 35.7% and 9.1% through fuel N oxidation by OH radicals and hydrolysis of chlorine salt at high temperatures. The increased oxygen concentration would inhibit the moisture influence and improve applicability for different MSW. In addition, 25% oxygen-enriched incineration was selected as the most suitable parameter for improving combustion efficiency and reducing pollutant emissions of MSW with high moisture content.","PeriodicalId":11899,"journal":{"name":"Environmental Technology and Innovation","volume":"396 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134901741","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Zero-valent iron to advance anaerobic membrane bioreactors for wastewater treatment and reuse: A critical review","authors":"Chenxu Wu, Chuanren Qi, Guanghao Zhai, Shuang Han, Xiaoye Song","doi":"10.1016/j.eti.2023.103394","DOIUrl":"https://doi.org/10.1016/j.eti.2023.103394","url":null,"abstract":"Anaerobic membrane bioreactors (AnMBRs) have been widely applied for wastewater treatment and resource recovery, but face several technical challenges, such as unstable methane (CH4) production, limited contaminant removal, and membrane fouling. Zero-valent iron (ZVI) can be a potential additive to improve AnMBRs performance by regulating anaerobic reaction conditions, electron transfer modes and microbial community structure. Thus, this review critically evaluated the role of ZVI to advance AnMBRs performance for wastewater treatment and resource recovery. Key physicochemical characteristics of ZVI were analyzed to highlight its potential for AnMBRs enhancement. The performance of ZVI and its modification to assist AnMBRs, regarding CH4 production, contaminant removal and membrane fouling, were discussed. Furthermore, future perspectives to the development of ZVI-assisted AnMBRs toward industrial application for practical wastewater treatment and resource recovery were provided.","PeriodicalId":11899,"journal":{"name":"Environmental Technology and Innovation","volume":"195 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135012332","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Influence of experimental parameters on the sorption behavior of Rare Earth Elements on manganese ferrite nanoparticles","authors":"João Pinto, Daniela Branco, Lina Carvalho, Bruno Henriques, Rosa Freitas, Tito Trindade, Daniela Tavares, Eduarda Pereira","doi":"10.1016/j.eti.2023.103432","DOIUrl":"https://doi.org/10.1016/j.eti.2023.103432","url":null,"abstract":"Rare Earth Elements (REE) are nearly irreplaceable in many technologies, but their supply is limited by geopolitical factors. Additionally, their exploration and refinement bring serious environmental consequences. As such, alternative sourcing of these elements through methods such as sorption has recently been attempted. Nanoparticles are exceptional REE sorbents, however, difficulties in material separation post-sorption have fueled an interest in the use of magnetic nanoparticles, which can be easily separated from the solution by applying an external magnetic field. In this study, we explore the influence of sorbent dosage, pH and matrix complexity in the removal of trivalent cations of nine REE (Y, La, Ce, Pr, Nd, Eu, Gd, Tb and Dy) using manganese ferrite nanoparticles (MnFe2O4); herein the abbreviation REE is employed to indicate such elements including the trivalent cations. The REE removal increased for higher sorbent dosages and pH. More than 90% of REE in mono-elemental solutions were removed from water at pH 6 and 8. Removal below 10% was observed for pH < 4, due to the positive surface charge of the sorbent which did not favor interaction with cationic REE species. Increasing the complexity of the matrix, the removal of REE from water decreased considerably, which can be attributed an increase of total REE concentration and the limited number of sorption sites in the sorbent. Further sorption inhibition was reported in increased ionic strength scenarios (mineral and saline water), possibly due to competition with Na+, which may limit the application of this material in complex matrices.","PeriodicalId":11899,"journal":{"name":"Environmental Technology and Innovation","volume":"8 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135455453","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mechanical and microstructural evolution of solidified/stabilized heavy metal-contaminated soil under a hydro-chemical-mechanical coupling environment","authors":"Zhongping Yang, Keshan Zhang, Xuyong Li, Jiazhuo Chang, Shuang Yang, Chunhua Ran","doi":"10.1016/j.eti.2023.103438","DOIUrl":"https://doi.org/10.1016/j.eti.2023.103438","url":null,"abstract":"The long-term effectiveness of Solidification/Stabilization (S/S) under realistic disposal scenarios is a common controversy of its application. This study sought to investigate the evolution of the mechanical properties and microstructure of Pb-Zn-Cd composite contaminated soil solidified/stabilized by cement and fly ash (CSCS) under a hydro-chemical-mechanical coupling environment (HCM). An HCM simulation system was developed to reproduce the simultaneous action of hydraulic, chemical, and stress environments on CSCS. The mechanical and microstructural evolution of CSCS under HCM was assessed using vertical settlement monitoring, unconfined compressive strength (UCS) test, computed tomography (CT), mercury intrusion porosimetry (MIP), scanning electron microscopy (SEM), and Fourier transform infrared spectroscopy (FTIR). The increasing environmental acidity induces an increase in vertical displacement and a decrease in UCS. The highest final settlement was 0.96 mm at pH 3 and a pressure of 250 kPa, which was 39.13% greater than the value at pH 5 and 7. The UCS decreased by 18.54% after 168 h of HCM treatment at pH 7, while the value reached 45.83% when the pH was lowered to 3. Seepage contributes to initial hydration as evidenced by an increase in the early E50 of the CSCS. Hydrodynamic scouring and chemical erosion increase the pore size and deteriorate the soil structure, whereas compaction helps to redistribute soil particles, thus improving the structural integrity and uniformity of the CSCS.","PeriodicalId":11899,"journal":{"name":"Environmental Technology and Innovation","volume":"11 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135565022","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The ability of biochars from cookstoves to remove pharmaceuticals and personal care products from hospital wastewater","authors":"Brigitte Mukarunyana, Christoffer Boman, Telesphore Kabera, Robert Lindgren, Jerker Fick","doi":"10.1016/j.eti.2023.103391","DOIUrl":"https://doi.org/10.1016/j.eti.2023.103391","url":null,"abstract":"Adequate treatment of wastewater to remove micropollutants constitutes a major concern globally. Despite this, large volumes of untreated wastewater are released into the environment, mainly due to the cost involved. Biochars have been suggested to have the potential to remove pharmaceuticals and personal care products (PPCP) from wastewater, but, adsorption potential needs to be investigated further. Production of biochars should also preferably be sustainable and based on low-cost materials. This study investigated the ability of nine biochars produced in three cookstoves and from three feedstocks. All biochars were characterized and then applied in adsorption experiments, based on authentic hospital effluent. Our analytical method included 32 pharmaceuticals and personal care products, and 28 of these were detected and quantified in hospital wastewater effluent samples. Some PPCP were present in relatively high concentrations (more than 24 µg/L). Adsorption experiments showed that the biochars used in the investigation had average removal rates (RR) ranging from 14.2% to 65.5%. Removal rates also varied between and within cookstoves and feedstock. Although cookstove biochars with a low surface area in this study generally showed lower removal rates, results from surface characterization were not detailed enough to correlate the physicochemical properties of the pollutants with the adsorption. Further characterizations are therefore needed to point out the most important parameters involved in PPCP adsorption on cookstove biochars.","PeriodicalId":11899,"journal":{"name":"Environmental Technology and Innovation","volume":"11 8","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135011919","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Sustainability assessment of faecal sludge treatment technologies for resource recovery in Phnom Penh, Cambodia","authors":"Chea Eliyan, Jennifer McConville, Christian Zurbrügg, Thammarat Koottatep, Kok Sothea, Björn Vinnerås","doi":"10.1016/j.eti.2023.103384","DOIUrl":"https://doi.org/10.1016/j.eti.2023.103384","url":null,"abstract":"Selection of appropriate sustainable treatment technologies involves satisfying user requirements, quality standards on treatment and products, and specific socio-technical constraints in the intended context. Using locally adapted multi-criteria assessment (MCA), this study investigated faecal sludge treatment technologies that enable resource recovery in Phnom Penh. A four-step structured approach was applied, involving i) identification of available options, ii) prerequisite screening, iii) MCA and iv) stakeholder discussions and ranking. Data were collected in a literature review, stakeholder interviews and an online survey. Lists of suitable primary (n=7) and secondary (n=13) treatment technologies were compiled based on the literature. Four secondary treatment technologies (solar drying, co-composting, vermicomposting, black soldier fly larvae (BSFL) composting) were retained after prerequisite screening and subjected to MCA. Co-composting was ranked highest in MCA, since it performed well in multiple aspects, especially for health criteria. However, when economic return on investment was prioritised and a lower treatment class was accepted, e.g. WHO Class B biosolids, the highest ranking was achieved by vermicomposting or BSFL composting. If institutional criteria were included in the assessment, solar drying would likely be the highest-ranked option, since this simple technology requires less logistically complex stakeholder arrangements than co-composting. These results show that the ranking obtained for different sludge treatment options depends on criteria weighting and trade-offs. Considering secondary treatment options is crucial during early planning for faecal sludge management in a city of low-and-middle income countries, as the primary treatment must yield appropriate feedstock quality for the secondary treatment step.","PeriodicalId":11899,"journal":{"name":"Environmental Technology and Innovation","volume":"302 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135012144","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Prediction Of Atmospheric Carbon Monoxide Concentration Utilizing Different Machine Learning Algorithms: A Case study in Kuala Lumpur, Malaysia","authors":"Sarmad Dashti Latif, Mustafa Almalayih, Ayman Yafouz, Ali Najah Ahmed, Nur’atiah Zaini, Dani Irwan, Nouar AlDahoul, Mohsen Sherif, Ahmed El-Shafie","doi":"10.1016/j.eti.2023.103387","DOIUrl":"https://doi.org/10.1016/j.eti.2023.103387","url":null,"abstract":"Insidious toxin carbon monoxide (CO) can imitate a wide range of different disease states. Clinicians have, and will continue to have, serious concerns about the impact of CO imbalances on the human body. Carbon monoxide concentration has been exceeding the allowable levels in Malaysia. Owing to this, the main objective of this research is to propose a carbon monoxide (CO) prediction model based on machine learning techniques. Three years of historical data were used as input to develop the proposed models to predict carbon monoxide concentrations on a 12-hour and 24-hour basis. Four different machine learning technique models were used for the prediction which are Decision Tree (DT), Random Forest (RF), Support Vector Machine (SVM), and Automated Neural Network – Multi-Layer Perceptron (ANN-MLP). The input parameters used are wind speed, humidity, Ozone (O3), Nitric oxide (NOx), Sulfur dioxide (SO2), and Nitrogen Dioxide (NO2). For each location, in this study, the uncertainty of the models utilized has been implemented to ensure the robustness of the performance. Furthermore, Taylor Diagram has been constructed to distinguish the performance of each model. The results indicate that ANN-MLP outperformed the all-other models involved in this study and showed efficiency in predicting Carbone monoxide concentration. By using ANN-MLP, the highest determination coefficient R2 were achieved which are 0.7190, 0.8914 and 0.7441 for the first station (S1), second station (S2) and the third station (S3) respectively by using 24-hour dataset. Meanwhile, by using a 12-hour dataset, 0.7490 for S1, 0.8942 for S2 and 0.8127 for S3. The uncertainty analysis of the ANN-MLP has 0.99 of confidence level and the lowest d-factor achieved, at S2 by using 12-hour dataset, is 0.000250455. These results ensure the effectiveness and robustness of ANN-MLP to predict carbon monoxide in the tropospheric layer. Not applicable.","PeriodicalId":11899,"journal":{"name":"Environmental Technology and Innovation","volume":"114 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135012294","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Green management of wet olive pomace by means of ultrafiltration of an aqueous extract of phenolic compounds.","authors":"Carmen M. Sánchez-Arévalo, María Cinta Vincent-Vela, Silvia Álvarez-Blanco","doi":"10.1016/j.eti.2023.103385","DOIUrl":"https://doi.org/10.1016/j.eti.2023.103385","url":null,"abstract":"Wet olive pomace is a major by-product generated by olive mills. To contribute to the circular economy of the olive industry, the recovery of interesting compounds from wet olive pomace was assessed. To that end, a previously optimized solid-liquid extraction, only employing water as the extractant, was first applied to the wet olive pomace. Afterwards, an ultrafiltration process to treat the obtained extract was developed. Several membranes (UP005, UH030, UH050, and UP150, from Microdyn Nadir) were studied, in a wide range of cross-flow velocities (1.5-3.5 m/s) and transmembrane pressures (0.75-5.5 bar). By a thorough characterization of the ultrafiltration streams by LC-ESI-QToF-MS, it was possible to describe the evolution of the rejection of 29 phenolic compounds. Some adsorption processes were also observed in the ultrafiltration process. The UP005 and UH030 membranes displayed satisfactory values of permeate flux and rejection. Both membranes efficiently retained a high fraction of the total solids, chemical oxygen demand, and color. On the contrary, the phenolic compounds were obtained in the ultrafiltration permeate, which constitutes a source of antioxidant molecules with applications in cosmetics, pharmacy, and nutraceutics.","PeriodicalId":11899,"journal":{"name":"Environmental Technology and Innovation","volume":"114 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135012551","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}