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Ultrasound sludge

Meiqiang Cai, Jian-Qiang Hu, George F Wells, Youngwoo Young Seo, Richard Spinney, Shih-Hsin Ho, Dionysios D Dionysiou, Jie Su, Ruiyang Xiao, Zongsu Wei
Enhancing activated sludge dewaterability is of scientific and engineering importance in the face of accelerated urbanization and stringent environmental regulations. In this study, we investigated the integration of acidification and ultrasound (A/US) treatments for improving sludge dewaterability at both bench‒ and pilot‒scales. Our results showed that the A/US system exhibited significantly improved sludge dewatering performance, characterized by capillary suction time, cake moisture, and water/solid content of sludge cake...
March 8, 2018: Environmental Science & Technology
Yu Xia, Chao Yang, Tong Zhang
Background: Part-stream low-frequency ultrasound (LFUS) was one of the common practices for sludge disintegration in full-scale anaerobic digestion (AD) facilities. However, the effectiveness of part-stream LFUS treatment and its effect on AD microbiome have not been fully elucidated. Methods: Here we testified the effectiveness of part-stream LFUS pretreatment by treating only a fraction of feed sludge (23% and 33% total solid of the feed sludge) with 20 Hz LFUS for 70 s...
2018: Biotechnology for Biofuels
Carla Serra, Cristina Felicani, Elena Mazzotta, Veronica Gabusi, Valentina Grasso, Antonio De Cinque, Lydia Giannitrapani, Maurizio Soresi
PURPOSE: Conventional grayscale ultrasound (US) is accurate in the diagnosis of gallbladder disease (GD), but in some cases, it is not decisive. Contrast-enhanced ultrasound (CEUS) improves the diagnostic accuracy of US. The primary objective of this study is to assess the reliability of CEUS in the diagnosis of sludge; the secondary objective is to assess the ability of CEUS to diagnose cancer. METHODS: We retrospectively reviewed the US of 4137 patients positive for GD...
February 23, 2018: Journal of Ultrasound
Hui-Ping Zhang, Min Bai, Ji-Ying Gu, Ying-Qian He, Xiao-Hui Qiao, Lian-Fang Du
AIM: To describe contrast-enhanced ultrasound (CEUS) features and evaluate differential diagnosis value of CEUS and conventional ultrasound for patients with benign and malignant gallbladder lesions. METHODS: This study included 105 gallbladder lesions. Before surgical resection and pathological examination, conventional ultrasound and CEUS were performed to examine for lesions. Then, all the lesions were diagnosed as (1) benign, (2) probably benign, (3) probably malignant or (4) malignant using both conventional ultrasound and CEUS...
February 14, 2018: World Journal of Gastroenterology: WJG
Jochen Bandelin, Thomas Lippert, Jörg E Drewes, Konrad Koch
The generation of cavitation fields for the pre-treatment of anaerobic sludge was studied by means of a novel acoustic measuring system. The influence of different reactor dimensions (i.e., choosing reaction chamber widths of 40, 60 and 80 mm) on the cavitation intensity was determined at various solid contents, flow rates and static pressures. Results suggest that the cavitation intensity is significantly reduced by the sonication of liquids with a high solid content. By increasing the pressure to 1 bar, the intensity of bubble implosions can be enhanced and the sound attenuation in the solid fraction is partly compensated compared to ambient pressure...
April 2018: Ultrasonics Sonochemistry
Tao Wang, Diandian Zhang, Yating Sun, Shanshan Zhou, Lin Li, Jingjing Shao
A lab-scale ultrasound enhancing Anammox reactor (R1) was established and irradiated once a week by ultrasound with the optimal parameter (frequency of 25 kHz, intensity of 0.2 W cm-2 and exposure time of 3 min) obtained by batch experiments. R1 and the controlled Anammox reactor (R2) without exposure to the ultrasound were operated in parallel. The start-up period of Anammox process (53 days) in R1 was shorter than that (61 days) in R2. The nitrogen loading-enhancing period (day 53-day 135) in R1 was also shorter than that (day 61-day 151) in R2...
April 2018: Ultrasonics Sonochemistry
Paolo Bargellini, Riccardo Orlandi, Chiara Paloni, Giuseppe Rubini, Paolo Fonti, Cecilia Righi, Mark E Peterson, Mark Rishniw, Cristiano Boiti
Gall-bladder diseases are common in dogs and two-dimensional ultrasonography is a current standard method for diagnosis and treatment planning. However, findings from this modality can be nonspecific. The aim of this retrospective, case series study was to describe conventional and contrast-enhanced ultrasound (using SonoVue® ) findings in a group of dogs with histologically confirmed gall bladder disease. A total of 65 dogs were included. Branchlike, heterogeneous, and homogeneous contrast enhancement of echogenic intraluminal mass-forming lesions was a contrast-enhanced ultrasound characteristic of polypoid lesions due to cystic mucosal hyperplasia of the gallbladder and/or tumor, which had different wash-in and washout characteristics...
February 2, 2018: Veterinary Radiology & Ultrasound
Yechiel Burke, Ynon Gilboa, Moshe Bronshtein
No abstract text is available yet for this article.
January 5, 2018: Prenatal Diagnosis
Shilong He, Xicheng Tan, Xin Hu, Yingxin Gao
To recover oil from crude oil containing sludge is still a research hot topic from the view of sustainability, in which ultrasonic has been proven to be an efficient and environment friendly technique. However, the effect of sludge characteristic on ultrasonic assisted oil recovery efficiency is little known. In this study, the analysis of variance (ANOVA) was conducted based on six types of crude oily sludge with hydrophilicity and lipophilicity separately and five different ultrasonic operation factors (ultrasonic power (A), frequency (B), time (C), initial temperature (D) and pH (E))...
January 3, 2018: Environmental Technology
Sumit Kumar Singh, Anshu Srivastava, Praveer Rai, Surender K Yachha, Ujjal Poddar
OBJECTIVES: Endoscopic ultrasound (EUS) is an established tool for evaluation of adults with acute recurrent pancreatitis (ARP) whereas data in pediatrics is limited. Our study assessed the role of EUS in identifying etiology including changes of chronic pancreatitis (CP) in children and adolescents with ARP. METHODS: Children with ARP (≥2 episodes of acute pancreatitis [AP]) were prospectively evaluated with a detailed clinical proforma and EUS. Subjects with known etiology of ARP or CP on ultrasonography/computed tomography and magnetic resonance cholangiopancreatography (MRCP, Cambridge grade ≥3) were excluded...
March 2018: Journal of Pediatric Gastroenterology and Nutrition
Napatt Kanjanahattakij, Kamolyut Lapumnuaypol, Sanna Fatima, Eyob Feyssa
Introduction: In general population, gallstone pancreatitis is the most common cause of pancreatitis. However, there are very few literatures that address this topic in post-liver-transplant patients. Clinical Case: A 69-year-old female who had a liver transplant in 2015 due to hepatocellular carcinoma and nonalcoholic steatohepatitis (NASH) cirrhosis. She had a recent episode of acute cellular rejection that was treated with high dose methylprednisolone 1 week prior to admission...
2017: Case Reports in Transplantation
Panteleimon E Papakonstantinou, Natalia I Asimakopoulou, Emmanuel Kanoupakis, Spyridon Maragkoudakis, Simeon Panagiotakis, Achilleas Gikas
INTRODUCTION: Acute cholecystitis and biliary colic may have signs and symptoms similar to those of Acute Coronary Syndrome(ACS) along with ischemic ECG changes. Cholecystitis and/or biliary colic have been both reported as trigger factors for bradyarrhythmia in the literature. CASE REPORT: A 78-year-old male patient was admitted to our Emergency Department (ED) due to acute abdominal pain. The ECG on admission showed sinus bradycardia with a rate of 40 beats per minute (bpm) without signs of acute ischemia and a brief period (7 s) of complete atrioventricular (AV) block...
November 18, 2017: International Emergency Nursing
Xiaoyuan Man, Xun-An Ning, Haiyuan Zou, Jieying Liang, Jian Sun, Xingwen Lu, Jiekui Sun
This paper proposes a combined ultrasound (US) and zero-valent iron/EDTA/Air (ZEA) system to remove polycyclic aromatic hydrocarbons (PAHs) from textile dyeing sludge. The removal efficiencies of 16 PAHs using ZEA, US/Air (air injected into the US process), and US/ZEA treatments were investigated, together with the effects of various operating parameters. The enhanced mechanisms of US and the role of reactive oxygen species (ROS) in removing PAHs in the US/ZEA system were explored. Results showed that only 42...
January 2018: Chemosphere
Juliette Sonet, Anthony Barthélemy, Isabelle Goy-Thollot, Céline Pouzot-Nevoret
Despite the emergence of new serovars, a detailed and current abdominal ultrasonographic description of dogs with leptospirosis is lacking. The purpose of this prospective, observational, single cohort study was to illustrate abdominal ultrasonographic findings in 35 dogs with confirmed leptospirosis. At least one ultrasonographic abnormality was seen in all of the dogs. Ultrasound renal abnormalities were found in all the dogs and included increased renal cortical echogenicity (100%), increased medullary echogenicity (86%), reduced corticomedullary definition (80%), cortical thickening (74%), renomegaly (60%), pelvic dilation (31%), and medullary band (14%)...
November 1, 2017: Veterinary Radiology & Ultrasound
Anu Mary Ealias, M P Saravanakumar
Protein Rich Solution (PRS) was prepared from the sewage sludge with ultrasonic assistance. With PRS, aluminium based nanosheet like materials (AlNs) were synthesised for the ultrasonic removal of Congo Red (CR) and Crystal Violet (CV) dyes. PRS was characterised by UV, EEM and NMR spectral analysis. AlNs were characterised by FTIR, XRD, TGA, BET, SEM, AFM, TEM and XPS analysis. The point of zero charge of AlNs was found to be 5.4. The BET analysis ensured that the average pore diameter and total pore volume of AlNs as 8...
October 23, 2017: Journal of Environmental Management
Demosthenes D Cokkinos, Eleni G Antypa, Sofia Tsolaki, Maria Skylakaki, Alkmini Skoura, Vassiliki Mellou, Ioannis Kalogeropoulos
The gallbladder and bile ducts are usually assessed initially with conventional gray-scale ultrasound (US). Contrast enhanced US (CEUS) is used when a diagnosis cannot be reached with conventional US. CEUS is easy to learn and perform. US contrast agents can be safely administered in patients with renal function impairment. In this pictorial essay the physics, examination technique and indications of CEUS for examining the gallbladder and bile ducts are reviewed. Gallbladder indications include elucidating normal variants, differentiating sludge from neoplastic lesions, benign and malignant pathology, infection, wall rupture and hemobilia...
October 6, 2017: Journal of Clinical Ultrasound: JCU
Yaowei Ke, Xun-An Ning, Jieying Liang, Haiyuan Zou, Jian Sun, Hualing Cai, Meiqing Lin, Ruijing Li, Yaping Zhang
In this work, the impact of organic matter on the degradation of polycyclic aromatic hydrocarbons (PAHs) in textile dyeing sludge by ultrasound-Fenton process has been studied. Sludge organic matter (SOM) was characterized and the degradation efficiencies of PAHs at various oxidation intensities (Fenton's reagent of 20, 70, and 140mmol/L, ultrasonic densities of 0.36, 0.90, and 1.80W/cm(3), and reaction time of 15, 25, and 40min) were determined. The results showed that 75.52-84.40% of PAHs and 16.32-31.13% of SOM had degraded after ultrasound-Fenton treatment, confirming the competitive relation between both of them for degradation...
September 19, 2017: Journal of Hazardous Materials
Cheng Zhu, Panyue Zhang, Hongjie Wang, Jie Ye
Strong water trapping ability of polyelectrolyte flocculated sludge and high compressibility of sludge filter cake greatly hindered the further improvement of sludge dewaterability. Ultrasound (US) was used to strip the water from the sludge flocs through sludge disintegration, traditional cationic polyacrylamide (CPAM) was applied to reconstruct the sludge aggregates through flocculation, and rice husk (RH) was utilized to improve the permeability of sludge filter cake as skeleton builders in this paper. The feasibility of combined US-CPAM-RH sludge conditioning was demonstrated, and single and co-conditioning processes were compared to explore the synergetic effect and mechanisms of US-CPAM-RH sludge conditioning...
January 2018: Ultrasonics Sonochemistry
Thomas W Loehfelm, Justin R Tse, R Brooke Jeffrey, Aya Kamaya
PURPOSE: To test the diagnostic performance of elevated peak systolic hepatic arterial velocity (HAv) in the diagnosis of acute cholecystitis. METHODS: 229 patients with an ultrasound (US) performed for right upper quadrant (RUQ) pain were retrospectively reviewed. 35 had cholecystectomy within 10 days of ultrasound and were included as test subjects. 47 had normal US and serology and were included as controls. Each test patient US was reviewed for the presence of gallstones, gallbladder distention, sludge, echogenic pericholecystic fat, pericholecystic fluid, gallbladder wall thickening, gallbladder wall hyperemia, and reported sonographic Murphy sign...
August 24, 2017: Abdominal Radiology
Maheeba A M Abdulla, Fajer Juma Almoosa, Rana Juma Almoosa, Jehad Al Qamish
BACKGROUND: Sickle cell disease is a genetic disorder that leads to abnormally high levels of hemoglobin sickling in erythrocytes. Patients suffer debilitating and severe complications that affect multiple organs, though mainly the liver, gallbladder, spleen, bones, and kidneys. It has a significant impact on morbidity and mortality rates and is associated with substantial health care costs. METHODS: For this study, the researchers prospectively reviewed the charts of 154 sickle cell disease patients who had been treated in Salmaniya Medical Complex hospital in Bahrain between September 2013 and December 2014...
2017: International Journal of General Medicine
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