Emerging investigator series: transformation of common antibiotics during water disinfection with chlorine and formation of antibacterially active products

2019 ◽  
Vol 5 (7) ◽  
pp. 1222-1233 ◽  
Author(s):  
Nicole L. Kennedy Neth ◽  
Clifford M. Carlin ◽  
Olya S. Keen
Keyword(s):  
Wastewater Treatment ◽  
Water Disinfection ◽  
The Common ◽  
Series Transformation

This study determined that at chlorination conditions representative of wastewater treatment, fluoroquinolones, one of the common antibiotic classes, form antibacterially active products.

Research of Treatment Technology for Electroplating Wastewater

2014 ◽  
Vol 487 ◽  
pp. 713-716 ◽  
Author(s):  
Yi Dan Zhou ◽  
Miao Sun ◽  
Li Juan Wang ◽  
Guan Nan Xi
Keyword(s):  
Waste Water ◽  
Wastewater Treatment ◽  
Electrochemical Method ◽  
Chemical Process ◽  
Biological Treatment ◽  
Chemical Method ◽  
Treatment Technology ◽  
Electroplating Wastewater ◽  
The Common ◽  
Physical And Chemical

The sources and composition of electroplating waste water are summarized. The common wastewater treatment technology, such as physical and chemical method, physic-chemical process, biological treatment and electrochemical method, and so on. Then the vision for the development of electroplating wastewater treatment technology is made.

scholarly journals Epidemiology of Bladder Cancer

2020 ◽  
Vol 8 (1) ◽  
pp. 15 ◽  
Author(s):  
Kalyan Saginala ◽  
Adam Barsouk ◽  
John Sukumar Aluru ◽  
Prashanth Rawla ◽  
Sandeep Anand Padala ◽  
...  
Keyword(s):  
Bladder Cancer ◽  
Disease Burden ◽  
Workplace Safety ◽  
The United States ◽  
Water Disinfection ◽  
Safety Practices ◽  
The Us ◽  
The Common ◽  
Developed World ◽  
Made In

Based on the latest GLOBOCAN data, bladder cancer accounts for 3% of global cancer diagnoses and is especially prevalent in the developed world. In the United States, bladder cancer is the sixth most incident neoplasm. A total of 90% of bladder cancer diagnoses are made in those 55 years of age and older, and the disease is four times more common in men than women. While the average 5-year survival in the US is 77%, the 5-year survival for those with metastatic disease is a measly 5%. The strongest risk factor for bladder cancer is tobacco smoking, which accounts for 50–65% of all cases. Occupational or environmental toxins likewise greatly contribute to disease burden (accounting for an estimated 20% of all cases), though the precise proportion can be obscured by the fact bladder cancer develops decades after exposure, even if the exposure only lasted several years. Schistosomiasis infection is the common cause of bladder cancer in regions of Africa and the Middle East and is considered the second most onerous tropical pathogen after malaria. With 81% of cases attributable to known risk factors (and only 7% to heritable mutations), bladder cancer is a prime candidate for prevention strategies. Smoking cessation, workplace safety practices, weight loss, exercise and schistosomiasis prevention (via water disinfection and mass drug administration) have all been shown to significantly decrease the risk of bladder cancer, which poses a growing burden around the world.

New simulators for the optimum management and operation of wastewater treatment plant

2001 ◽  
Vol 44 (2-3) ◽  
pp. 1-8
Author(s):  
E. Ayesa ◽  
G. Garralon ◽  
A. Rivas ◽  
J. Suescun ◽  
L. Larrea ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Wastewater Treatment Plants ◽  
Treatment Plant ◽  
Real Data ◽  
Plant Operation ◽  
Plant Exploitation ◽  
Plant Data ◽  
The Common ◽  
Optimum Management ◽  
The Mathematical Model

This paper presents the basic description and the first full-scale implementation of a new kind of simulator specially designed to facilitate and improve the management and operation of modern wastewater treatment plants (WWTP). This new kind of simulator for plant operation is specifically adapted to every WWTP and the software is developed considering the common needs of the operators in plant exploitation. The internal structure of the plant operation simulator is based on a complete connection between the real data and the mathematical model of the plant. The software is then able to perform the processing, storage and management of the plant data and to predict the evolution of the process reading the required inputs from its stored files. The results obtained with the first application recommend the implementation of this new kind of simulators for plant operation in other treatment plants. However, it is important to note that the application of this technology implies a systematic and rigorous methodology in the acquisition and processing of the most significant plant data.

Adaptive predictive expert control of dissolved oxygen concentration in a wastewater treatment plant

2011 ◽  
Vol 64 (5) ◽  
pp. 1130-1136 ◽  
Author(s):  
G. Kandare ◽  
A. Nevado Reviriego
Keyword(s):  
Wastewater Treatment ◽  
Dissolved Oxygen ◽  
Wastewater Treatment Plant ◽  
Treatment Plant ◽  
Operating Conditions ◽  
Expert Control ◽  
Control Loops ◽  
Process Dynamics ◽  
The Common ◽  
Do Control

In this paper we present the application of adaptive predictive expert controllers to dissolved oxygen (DO) control in the aerobic reactors of a wastewater treatment plant. The control system described in this paper consists of adaptive predictive expert control loops complemented by optimisation logic. The controllers successfully cope with nonlinearity and changing operating conditions of the process by predicting the evolution of the controlled variable and adapting to changes in the process dynamics. This results in more precise and stable DO control, offering many benefits. The complementary optimisation logic maintains the air pressure in the common collector at the lowest possible level, enabling adequate DO control and thus considerably reducing energy consumption.

Improving aeration control at the Ljubljana wastewater treatment plant

2013 ◽  
Vol 69 (7) ◽  
pp. 1395-1402 ◽  
Author(s):  
D. Vrečko ◽  
U. Zupančič ◽  
R. Babič
Keyword(s):  
Wastewater Treatment ◽  
Wastewater Treatment Plant ◽  
Treatment Plant ◽  
Air Pressure ◽  
Set Point ◽  
The Common ◽  
Pressure Controller ◽  
Oxygen Concentrations ◽  
Aeration Control

This paper describes an improvement to the aeration control at the Ljubljana wastewater treatment plant. Several changes were made to the existing aeration control. An adjustment to the parameters of the common air pressure controller contributes to a more responsive operation of the compressors. The introduction of the air pressure set-point controller adjusts the air pressure in the common air rail according to the changes in the plant load. The introduction of the airflow controllers reduces the variation in the oxygen concentrations in the aerobic reactors and, consequently, enables a reduction in the oxygen set-points. With the improved aeration control, savings of up to 10% in the electricity used for aeration are achieved on a yearly basis.

scholarly journals A BIBLIOMETRIC ANALYSIS OF RESEARCH ON BIOCHAR FOR WASTEWATER TREATMENT

2021 ◽  
Vol 20 (1) ◽  
pp. 29-38
Author(s):  
Laili Fitria
Keyword(s):  
Heavy Metals ◽  
Wastewater Treatment ◽  
Bibliometric Analysis ◽  
Hazardous Materials ◽  
Future Research ◽  
University Of Florida ◽  
The Common ◽  
Scopus Database ◽  
Highly Cited Articles ◽  
Highly Cited

ABSTRACT  This paper investigates global research of highly cited articles on biochar for wastewater treatment using bibliometricanalysis from Scopus database. Based on bibliometric, highly cited articles were published between 2009-2018. We found33 highly cited articles with 6,429 citations from various journals, countries, institutions, and authors. The most activejournal to publish biochar in wastewater treatment is Journal of Hazardous Materials (JHM) from Netherlands. Mostactive authors come from America and China. University of Florida, USA, is the most active institution to research theuse of biochar in wastewater treatment. Then, the common keywords that authors used are biochar and heavy metals. Itshows that biochar is effective to remove heavy metals from wastewater. Also, biochar optimization in production andadsorption is a concern of future research. This is one of the first attempts to understand a stream of research which, overtime, has paved the way for the utilization of biochar as a material for wastewater treatment.

scholarly journals Hydroxyl Radical Generation by Recyclable Photocatalytic Fe3O4/ZnO Nanoparticles for Water Disinfection

2020 ◽  
Vol 13 ◽  
pp. 117862212097095
Author(s):  
Oscar D Maynez-Navarro ◽  
Miguel A Mendez-Rojas ◽  
D Xanat Flores-Cervantes ◽  
Jose L Sanchez-Salas
Keyword(s):  
Escherichia Coli ◽  
Wastewater Treatment ◽  
Large Scale ◽  
Advanced Oxidation Processes ◽  
Water Disinfection ◽  
Oh Radicals ◽  
Bacterial Inactivation ◽  
Oxidation Processes ◽  
Radical Generation ◽  
Improved Performance

Advanced oxidation processes based on photocatalytic generation of •OH radicals have emerged as promising technologies for the removal of recalcitrant pollutants in water. However, their poor recyclability has reduced their potential large-scale application. Herein, a Fe3O4-embedded ZnO system has been prepared and its photocatalytic •OH radicals activity was evaluated by monitoring the photo-assisted bleaching of p-nitrosodimethylaniline ( pNDA). Water disinfection performance was determined by measuring Escherichia coli inactivation under different conditions. Bleaching of nearly 80% of the initial pNDA concentration after just 120 minutes under UV365nm irradiation was determined. Bacterial inactivation at different concentrations (0.1, 1.0, and 5.0 mg mL−1) of the Fe3O4/ZnO nanocomposite was determined, finding that the best performance was obtained at 0.1 mg mL−1 (90%) just after the first 30 minutes under UV irradiation. The materials are easily magnetically recovered and their performance evaluated after 3 consecutive cycles of reuse. These magnetic and photoactive nanocomposites showed improved performance and could be used for wastewater treatment or disinfection processes of water.

scholarly journals Integrated Treatment of Mining Dam Wastewater With Quaternized Chitosan and Pan/hpmc/agno3 Nanostructured Hydrophylic Membranes

2021 ◽  
Author(s):  
Rodrigo Gonçalves Bigogno ◽  
Marcos Lopes Dias ◽  
Mariana Borges N. Manhães ◽  
Ruben J. Sanchez Rodriguez
Keyword(s):  
Wastewater Treatment ◽  
Hydroxypropyl Methylcellulose ◽  
Primary Treatment ◽  
Total Coliform ◽  
Integrated Treatment ◽  
Electrospinning Process ◽  
Water Disinfection ◽  
Pathogenic Potential ◽  
Quaternized Chitosan ◽  
Nanostructured Membranes

Abstract This study was developed a novel nanostructured membrane by electrospinning process, from polyacrylonitrile (PAN) modify by hydroxypropyl methylcellulose (HPMC) polymers containing AgNO3, to be used as a filter in an integrated wastewater dam treatment process to reuse it as drinking water. Different formulations (108 samples) were electrospun from PAN and (0, 5, 10%w) HPMC and (0, 0.5, 1%w) solutions to selected a more efficient formulation in water disinfection and higher hydrophilic character of the membrane to flow performance in the wastewater treatment. The PAN and HPMC phases in membranes were characterize by infrared spectroscopy (FTIR) and thermogravimetric analysis (TGA). The nanostructured membranes (SEM) were characterized by thickness fiber between 251 ± 58 and 306 ± 49 nm and lower fiber/membrane volume relations. The presence of HPMC and AgNO3 in membrane formulation endows superhydrophilicity and permeability increase which up to 21,151 ± 445 L.m-2.h-1. After filtration process with PAN/HPMC/AgNO3, all the tested water potability indexes were achieved. The primary treatment, using quaternized chitosan reduced the turbidity parameter from 19,000 NTU to 14 NTU, and after filtration with nanostructured membrane, to levels was below 1 NTU and pathogenic potential removed (Total Coliform and Escherichia coli). The results of this study indicated that the hydrophilic nanostructured membranes PAN/10%HPMC/1%AgNO3 have adequate properties to potential wastewater treatment mining for reuse. It´s give a sustainable strategy for managing wastewater which should be reduce the volume of water in the tailing’s dams and contributes to increasing the stability of dams and reducing risks with catastrophic environmental impact.

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