نتایج جستجو برای: wastewater treatment plants

تعداد نتایج: 1585451  

Background and purpose: Emission of bioaerosols from wastewater treatment plants is a potential hazard to human health. In this study aimed at investigating the effects of surface and deep aeration techniques on density and type of airborne bacteria and fungi in two municipal wastewater treatment plants. Materials and methods: This descriptive cross-sectional study was done in two wastewater t...

2014
Jirawan Torit

Contaminated phosphorus in aquatic environments is a critical problem. This research studied on removal of phosphorus from domestic wastewater by using Echinodorus cordifolius augmented with Pseudomonas putida and Flavobacterium oryzihabitans. Plants treated phosphorus from domestic wastewater for 20 test runs continuously, the effect of phosphorus treatment by microorganisms in domestic wastew...

Journal: :Water research 2010
Ashley Murray Isha Ray

The benefits of Integrated Water Resources Management (IWRM) are widely known but its recommendations remain thinly implemented. Designing wastewater treatment plants for reuse in irrigation is a particularly underutilized IWRM opportunity that could potentially increase agricultural yields, conserve surface water, offset chemical fertilizer demand, and reduce the costs of wastewater treatment ...

Journal: :نشریه بازیافت آب 0
مصطفی داوودی نژاد تهران، دانشگاه تهران، دانش آموختة دانشکدة مهندسی شیمی پوریا بی پروا ساری، دانشگاه علوم کشاورزی و منابع طبیعی، دانشکدة علوم پایه احمد اکبرپور طلوتی تهران، دانشگاه تهران، دانش آموختة دانشکدة محیط زیست

producing biogas is the most common method of energy generation in municipal and industrial wastewater treatment plants in the world. methane production rate depends on degradation rate of organic pollutants in wastewater, temperature and treatment process. typical parameters for assessment of organic wastewater such as bod or cod indicate the potential to produce methane. there is no accurate ...

Introduction: The use of antiseptics and disinfectants in daily health protocols has a consequence of changing the quality of wastewater to be toxic to microbes. As a result, microbiological wastewater treatment has the potential to not be processed properly. To solve the problem of disinfectant-rich wastewater, a plant-based treatment method can be useful, the implementation of which is a land...

Journal: :Environmental safety and natural resources 2018

2008
Porché Spence Jasper Harris

Fecal coliform bacteria cause water quality problems for many urban areas across the United States. The objective of this study is to determine if the Irwin Creek and Sugar Creek wastewater treatment plants, located near Charlotte in Mecklenburg County, North Carolina, contribute significantly to the fecal coliform concentrations in the creeks. Fecal coliform densities in the wastewater effluen...

2013
JOHAN FREDRIKSSON

Wastewater treatment is necessary to reduce the health risks and environmental impacts associated with discharge of untreated wastewater. The most common way to treat wastewater in wastewater treatment plants is through the activated sludge process. Although the main principle of the process has been the same since its usage began 100 years ago, there has been a continuous development and moder...

Journal: :jundishapur journal of health sciences 0
tahereh mohebzadeh islamic azad university, bandar abbasbranch, bandar abbas, iran mohammad mehdi taghizadeh islamic azad university, estahban branch, estahban, iran; islamic azad university estahban branch, iran tel:+989173135359 afshin takdastan department of environmental health engineering, school of health and environmental technology research center, jundishapur university of medical sciences, ahvaz, iran mansooreh dehghani department of environmental health engineering, shiraz university of medical sciences, shiraz, iran

introduction: due to the risks of hormones on human health and aquatic life, the aims of this study were to determine the efficiency of estrogen removal in the different stages of shiraz wastewater treatment plant using activated sludge process and marvdasht wastewater treatment plant using aerated lagoons process and also comparing the performance of both systems in removing the hormone of est...

Journal: :Journal of water and health 2012
Hui-Wen A Cheng Frances E Lucy Michael A Broaders Sergey E Mastitsky Chien-Hsien Chen Amanda Murray

Municipal wastewater treatment plants play a crucial role in reducing the microbial and pathogen load of human wastes before the end-products are discharged to surface waters (final effluent) or land spread (biosolids). This study investigated the occurrence frequency of noroviruses, Enterococcus faecalis and Enterococcus faecium in influent, final effluent and biosolids from four secondary was...

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