نتایج جستجو برای: wastewater disinfection

تعداد نتایج: 41563  

2007
JARI KOIVUNEN

Conventional wastewater treatment, primary and secondary treatment processes with simultaneous phosphorus precipitation, is the most common process combination used in Finnish wastewater treatment plants (WWTPs). It typically eliminates most of the organic load and phosphorus, as well as part of the enteric microorganisms present in raw wastewater. Municipal secondary effluents still contain so...

2003
F. Absi F. Gamache R. Gehr P. Liechti J. Nicell

An ozonation pilot plant was installed at the Montréal Urban Community Wastewater Treatment Plant (MUCWTP) to assess the feasibility of employing a full scale ozone disinfection system. Wastewater characteristics such as turbidity, COD, TOC, BOD, pH, ORP and suspended solids were monitored to assess their effect on ozone disinfection. Fecal conforms (FC) were used as indicators to measure disin...

2012

Disinfection is considered to be the primary mechanism for the inactivation/destruction of pathogenic organisms to prevent the spread of waterborne diseases to downstream users and the environment. It is important that wastewater be adequately treated prior to disinfection in order for any disinfectant to be effective. Table 1 lists some common microorganisms found in domestic wastewater and th...

Journal: :Japan journal of water pollution research 1988

Journal: :Water research 2016
Xiao Huang Yan Qu Clément A Cid Cody Finke Michael R Hoffmann Keahying Lim Sunny C Jiang

The paucity of proper sanitation facilities has contributed to the spread of waterborne diseases in many developing countries. The primary goal of this study was to demonstrate the feasibility of using a wastewater electrolysis cell (WEC) for toilet wastewater disinfection. The treated wastewater was designed to reuse for toilet flushing and agricultural irrigation. Laboratory-scale electrochem...

Journal: :Water research 2012
Xiujuan Wang Xuexiang Hu Haibo Wang Chun Hu

The effectiveness of UV and chlorination, used individually and sequentially, was investigated in killing pathogenic microorganisms and inhibiting the formation of disinfection by-products in two different municipal wastewaters for the source water of reclaimed water, which were from a microfilter (W1) and membrane bioreactor (W2) respectively. Heterotrophic plate count (HPC), total bacteria co...

2016
Terry M. Gellner Kim Riddle Donna Francy

Wastewater treatment plants in Ohio and elsewhere in the U.S. operating with MBR systems are required to disinfect permeate. This requirement results in an increased cost to both capital and O&M, and with chlorination there is a potential increase in the formation of disinfection byproducts. Disinfection following MBR treatment may not be needed if the MBR process alone removes microorganisms a...

Journal: :Water science and technology : a journal of the International Association on Water Pollution Research 2013
P Ragazzo N Chiucchini V Piccolo M Ostoich

To evaluate the efficiency and effect of a new disinfection technology in wastewater treatment, batch and full-scale experiments were performed between winter 2005 and summer 2011. The system, developed by Kemira Oyj, produces a disinfection solution containing performic acid (PFA) by mixing hydrogen peroxide and formic acid. A preliminary study in batch reactors established the suitability for...

1997
Cathleen Falvey Robert W. Emerick

An innovative system was designed to provide for wastewater collection, treatment, disinfection, and reuse for a small residential development in California. The system combines the use of septic tanks, screened effluent filter vaults, high-head effluent pumps, small-diameter variable grade sewers, pressure sewers, a recirculating granular medium filter, an ultraviolet light disinfection unit, ...

2014
Somnath Basu Jack Page Irvine W. Wei

Disinfection is a very important unit process to deactivate coliform bacteria in treated wastewater. However, regrowth potential of coliform bacteria raises human health and safety concerns associated with reuse of treated wastewater in various applications. Both post chlorination and post UV disinfection regrowth have been reported in the literature. In view of increasing use of recycled waste...

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