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Ultrasound sludge

Ivan Mikhailov, Sergey Komarov, Vera Levina, Alexander Gusev, Jean-Paul Issi, Denis Kuznetsov
Ultrasonic-assisted sulphuric acid leaching combined with a Fenton-like process, utilizing nanoscale zero-valent iron (nZVI), was investigated to enhance the leaching of zinc from the blast furnace sludge (BFS). The leaching of iron (Fe) and zinc (Zn) from the sludge was investigated using Milli-Q water/BFS ratio of 10 and varying the concentration of hydrogen peroxide, sulphuric acid, the temperature, the input energy for ultrasound irradiation, and the presence or absence of nZVI as a Fenton reagent. The results showed that with 1g/l addition of nZVI and 0...
September 22, 2016: Journal of Hazardous Materials
Chunli Wan, Yanggui Shen, Si Chen, Xiang Liu, Guangmin Liu, Juin-Yih Lai, Duu-Jong Lee
This study revealed that the gross indicators commonly adopted for monitoring the performance of aerobic granular sludge processes are not capable of probing the microstructural deterioration of granule interior upon organic loading swaps. These granules subjected to loading swaps retained their global characteristics: appearances, sizes and settling velocities, chemical oxygen demand (COD) and ammonia-nitrogen removal capacities. However, the granule interior strength, as determined by ultrasound method, was largely weakened upon COD switch-off and was not recovered in the subsequent COD re-supply stage...
December 2016: Bioresource Technology
Fangxu Jia, Qing Yang, Jinhao Han, Xiuhong Liu, Xiyao Li, Yongzhen Peng
Tightly bound extracellular polymeric substances (TB-EPS) are important components of sludge, playing a crucial role in the behavior of activated sludge. They are located in the innermost layer of EPS which closely combine with the cell surface and are difficult to be extracted. To fully understand the role of TB-EPS, it is extremely important to find an appropriate TB-EPS extraction protocol, which provides maximum yields of TB-EPS under the premise of minimal contribution of cell lysis. Ultrasonic method has been widely applied for TB-EPS extraction due to its unique advantages, but no one has developed a systematic and scientifically optimized method for this protocol...
October 2016: Applied Microbiology and Biotechnology
Hyunsik Woo, Joon Koo Han, Jung Hoon Kim, Sung-Tae Hong, Md Hafiz Uddin, Ja-June Jang
OBJECTIVES: The purpose of this study is to evaluate high-resolution ultrasound and magnetic resonance imaging (MRI) in monitoring of cholangiocarcinoma in the hamsters with C. sinensis infection and N-nitrosodimethylamine (NDMA). MATERIALS AND METHODS: Twenty-four male Syrian golden hamsters of were divided into four groups composed of five hamsters as control, five hamsters receiving 30 metacercariae of C. sinensis per each hamster, five hamsters receiving NDMA in drinking water, and nine hamsters receiving both metacercariae and NDMA...
August 10, 2016: European Radiology
P R de Reuver, A H van Dijk, S Z Wennmacker, M P Lamberts, D Boerma, B L den Oudsten, M G W Dijkgraaf, S C Donkervoort, J A Roukema, G P Westert, J P H Drenth, C J H van Laarhoven, M A Boermeester
BACKGROUND: Five to 22 % of the adult Western population has gallstones. Among them, 13 to 22 % become symptomatic during their lifetime. Cholecystectomy is the preferred treatment for symptomatic cholecystolithiasis. Remarkably, cholecystectomy provides symptom relief in only 60-70 % of patients. The objective of this trial is to compare the effectiveness of usual (operative) care with a restrictive strategy using a standardized work-up with stepwise selection for cholecystectomy in patients with gallstones and abdominal complaints...
2016: BMC Surgery
L Ustyol, M D Bulut, K Agengin, K A Bala, A Yavuz, A Bora, K Demiroren, M Dogan
BACKGROUND: Biliary lithiasis, or sludge, and nephrolithiasis have been reported as a possible complication of ceftriaxone therapy. However, no study related to cefotaxime-induced biliary pseudolithiasis or nephrolithiasis was observed in the literature. Therefore, we investigated the comparative formation of biliary pseudolithiasis and nephrolithiasis after cefotaxime and ceftriaxone therapies. METHODS: The patients treated with ceftriaxone or cefotaxime were enrolled during the study period...
July 10, 2016: Human & Experimental Toxicology
Nuo Liu, Changxiu Gong, Jianguo Jiang, Feng Yan, Sicong Tian
We examined the effects of ultrasound (U), Fenton oxidation (F), and ultrasound coupled with Fenton oxidation (U + F) pre-treatments (prior to anaerobic digestion) on the elimination of odorous compounds. The results demonstrated that U promoted odor release, while the coupled treatment and F alone decreased odor release. After 20-min treatments, the concentration of dissolved sulfide (S(2-)) under the coupled U + F treatment declined from 17.4 mg/L to 8.1 mg/L, decreasing by more than 50% and 34%, respectively, for U alone and F alone...
October 1, 2016: Journal of Environmental Management
Omar Pineda, Hernán G Maydón, Mónica Amado, Elisa M Sepúlveda, Lizbeth Guilbert, Omar Espinosa, Carlos Zerrweck
INTRODUCTION: Bariatric surgery is the most effective therapy for weight loss in patients with morbid obesity. One of the most common long-term complications includes cholelithiasis. There is not a clear consensus in how to treat an asymptomatic gallbladder disease before and after bariatric surgery. METHODS: Prospective study with every patient submitted to bariatric surgery from 2012 to 2014. The gallbladder status was assessed with an ultrasound before and after surgery (12 months), and a conservative management was conducted for patients with asymptomatic disease (preoperative and de novo); the need for delayed cholecystectomy was reported...
June 21, 2016: Obesity Surgery
Hiroyuki Matsubayashi, Yoshiko Aikawa, Teiichi Sugiura, Keiko Sasaki, Kinichi Hotta, Hiroyuki Ono
A lymphoepithelial cyst (LEC) is a rare pancreatic lesion, histologically showing squamous epithelia, dense lymphoid tissues, and a keratin substance. Cross-section images of the pancreatic LEC typically show a well demarcated unilocular or multilocular cyst without a solid component. Here we report a rare case of pancreatic LEC in which multiple floating ball-like components were depicted via endoscopic ultrasound. The ball-like components were also depicted by various imaging methods such as computed tomography (CT) showing low-density components, T1-weighted magnetic resonance imaging (MRI) and diffusion-weighted imaging (DWI) showing high-intensity components, and T2-weighted MRI showing low-intensity components...
June 2016: Journal of Gastrointestinal and Liver Diseases: JGLD
Jie Zeng, Jun-Min Gao, You-Peng Chen, Peng Yan, Yang Dong, Yu Shen, Jin-Song Guo, Ni Zeng, Peng Zhang
As important constituents of activated sludge flocs, extracellular polymeric substances (EPS) play significant roles in pollutants adsorption, the formation and maintenance of microbial aggregates, and the protection of microbes from external environmental stresses. In this work, EPS in activated sludge from a municipal wastewater treatment plant (M-WWTP) with anaerobic/anoxic/oxic (A(2)/O) process and a hyperhaline wastewater treatment plant (H-WWTP) with anaerobic/oxic (A/O) process were extracted by ultrasound method...
2016: Scientific Reports
Joachim Richter, Daniel Azoulay, Yi Dong, Martha C Holtfreter, Robert Akpata, Julien Calderaro, Tarik El-Scheich, Matthias Breuer, Andreas Neumayr, Christoph Hatz, Gerald Kircheis, Monica C Botelho, Christoph F Dietrich
After malaria, schistosomiasis remains the most important tropical parasitic disease in large parts of the world. Schistosomiasis has recently re-emerged in Southern Europe. Intestinal schistosomiasis is caused by most Schistosoma (S.) spp. pathogenic to humans and leads to chronic inflammation and fibrosis of the colon as well as to liver fibrosis. Gallbladder abnormalities usually occur in patients with advanced hepatic portal fibrosis due to Schistosoma mansoni infection. Occasionally, gallbladder abnormalities have been seen also in children and occurring without associated overt liver abnormalities...
August 2016: Parasitology Research
Si-Kyung Cho, Dong-Hoon Kim, Christopher Quince, Wan-Taek Im, Sae-Eun Oh, Seung Gu Shin
To elucidate the enhanced methane yield from organic wastes, the effects of low-strength ultrasonication on the microbial community structures in upflow anaerobic sludge blanket reactors were for the first time analyzed using pyrosequencing. Interestingly, a more even microbial community was observed in the ultrasonicated granules than in the control, which could compensate for the decreased richness and resulted in comparable (archaea) or even higher (bacteria) diversity. The ultrasonicated granules contained higher levels of δ-Proteobacteria, of which many are reportedly potential syntrophs, as well as methanogenic genera Methanosaeta, Methanotorris, and Methanococcus...
September 2016: Ultrasonics Sonochemistry
Mohammad Boshir Ahmed, John L Zhou, Huu Hao Ngo, Wenshan Guo, Nikolaos S Thomaidis, Jiang Xu
This review focuses on the removal of emerging contaminants (ECs) by biological, chemical and hybrid technologies in effluents from wastewater treatment plants (WWTPs). Results showed that endocrine disruption chemicals (EDCs) were better removed by membrane bioreactor (MBR), activated sludge and aeration processes among different biological processes. Surfactants, EDCs and personal care products (PCPs) can be well removed by activated sludge process. Pesticides and pharmaceuticals showed good removal efficiencies by biological activated carbon...
April 23, 2016: Journal of Hazardous Materials
Andrea Gianico, Giorgio Bertanza, Camilla M Braguglia, Matteo Canato, Agata Gallipoli, Giuseppe Laera, Caterina Levantesi, Giuseppe Mininni
Sewage sludge processing is a key issue in water resource recovery facilities due to the inefficacy of conventional treatments to produce high quality biosolids to be safely used in agriculture. Under this framework, the performances of several enhanced stabilization processes, namely ultrasound-pretreated Mesophilic Anaerobic Digestion (US+MAD), thermophilic anaerobic digestion (TAD), thermal-pretreated TAD (TH+TAD) and ultrasound-pretreated inverse Temperature Phased Anaerobic Digestion (US+iTPAD) have been investigated...
May 2016: Water Environment Research: a Research Publication of the Water Environment Federation
Jieying Liang, Xun-An Ning, Taicheng An, Jian Sun, Yaping Zhang, Yujie Wang
This paper reports, for the first time, a combined technique of ultrasound (US) with KMnO4 degradation of aromatic amines in a textile-dyeing sludge. The reaction mechanisms and the degradation kinetics of aromatic amines at various operating parameters (KMnO4 dosage, US power density and pH) were systematically examined by the combined system of US-KMnO4. The results indicated that there was a synergistic effect between US and KMnO4, as US greatly enhanced KMnO4 in the degradation of aromatic amines and exhibited apparent sludge disintegration and separated pollutants from the sludge...
August 15, 2016: Journal of Hazardous Materials
He Zhao, Panyue Zhang, Guangming Zhang, Rong Cheng
Sonication is an effective way for sludge disintegration, which can significantly improve the efficiency of anaerobic digestion to reduce and recycle use of sludge. But high energy consumption limits the wide application of sonication. In order to improve ultrasonic sludge disintegration efficiency and reduce energy consumption, aeration was introduced. Results showed that sludge disintegration efficiency was improved significantly by combining aeration with ultrasound. The aeration flow rate, gas bubble size, ultrasonic density and aeration timing had impacts on sludge disintegration efficiency...
April 2016: Journal of Environmental Sciences (China)
Mark P Plummer, Palash Kar, Caroline E Cousins, Trygve Hausken, Kylie Lange, Marianne J Chapman, Karen L Jones, Michael Horowitz, Adam M Deane
OBJECTIVE: To quantify gallbladder dysfunction during critical illness. DESIGN: Prospective observational comparison study of nutrient-stimulated gallbladder emptying in health and critical illness. SETTING: Single-centre mixed medical/surgical ICU. PATIENTS: Twenty-four mechanically ventilated critically ill patients suitable to receive enteral nutrition were compared with 12 healthy subjects. INTERVENTIONS: Participants were studied after an 8-hour fast...
September 2016: Critical Care Medicine
J F Gerstenmaier, K N Hoang, R N Gibson
With its excellent contrast and spatial resolution, and the ability to image in real-time, ultrasound is the main imaging modality for assessing the gallbladder (GB). The application of contrast-enhanced ultrasound (CEUS) of the GB is now increasingly recognized as a useful addition to ultrasound and other cross-sectional imaging in the assessment of neoplastic and non-neoplastic GB disease. With the ability to image microcirculation and optimal contrast resolution, CEUS allows high-quality delineation in real-time, allowing for increased diagnostic confidence...
August 2016: Abdominal Radiology
Petra Novak, Tea Zuliani, Radmila Milačič, Janez Ščančar
Polybrominated diphenyl ethers (PBDEs) are flame retardants. As a consequence of their widespread use, they have been released into the environment. PBDEs are lipophilic organic contaminants that enter wastewater treatment plants (WWTPs) from urban, agricultural and industrial discharges. Because of their low aqueous solubility and resistance to biodegradation, up to 90% of the PBDEs are accumulated in the sewage sludge during the wastewater treatment. To assess the possibilities for sludge re-use, a reliable determination of the concentrations of these PBDEs is of crucial importance...
April 7, 2016: Analytica Chimica Acta
S M DeMonaco, D C Grant, M M Larson, D L Panciera, M S Leib
BACKGROUND: Biliary sludge is associated with gallbladder (GB) dysmotility and mucus hypersecretion suggesting a link between biliary sludge and the formation of GB mucoceles (GBM). If biliary sludge progresses to GBM, treatment to reduce the production and progression of sludge is warranted. HYPOTHESIS/OBJECTIVES: The objective of this study was to determine the course of biliary sludge in dogs. ANIMALS: Seventy-seven healthy, client-owned dogs ≥4 years of age screened for biliary sludge; 45 affected dogs identified...
May 2016: Journal of Veterinary Internal Medicine
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