municipal wastewater Articles

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Fat, oil and grease waste from municipal wastewater: characterization, activation and sustainable conversion into biofuel

by IWA Publishing  (Apr. 27, 2015)

Fat, oil and grease (FOG) recovered by the oil/water separator of a wastewater treatment plant (WWTP) were sampled, characterized, activated and converted into biofuel. Free acids (50–55%) and fatty soaps (26–32%) not only composed the main components, but they were also easily separable from the starting waste. The ...

Monitoring groundwater resources for Municipalities - Case Study

by Nova Metrix LLC.  (Apr. 30, 2015)

Background The City of Tucson is located in the Sonoran Desert in southwest United States (U.S.), approximately 100 km north of the Mexico-U.S. border. Tucson Water operates more than 215 groundwater wells, covering more than 300 square miles, providing more than 37 billion gallons (140 million m3) of potable water to its 730,000 inhabitants each ...

Chitosan use in chemical conditioning for dewatering municipal-activated sludge

by IWA Publishing  (Mar. 27, 2015)

This work aims to evaluate the potential use of chitosan as an eco-friendly flocculant in chemical conditioning of municipal-activated sludge. Chitosan effectiveness was compared with synthetic cationic polyelectrolyte Sedipur CF802 (Sed CF802) and ferric chloride (FeCl3). In this context, raw sludge samples from Beni-Messous wastewater ...

Long-term performance of side-stream deammonification in a continuous flow granular-activated sludge process for nitrogen removal from high ammonium wastewater

by IWA Publishing  (Apr. 27, 2015)

An innovative granular sludge deammonification system was incorporated into a conventional-activated sludge process. The process incorporated an internal baffle in the bioreactor for continuous separation of granular biomass from flocculent biomass, which allowed for controlling the solids retention time of flocculent sludge. The process was ...

Bioaugmentation/waste water treatment in municipal WWTP - Case Study

by Atlas Seis - Sistemas de Energia para a Industria e Serviços, Lda.  (Mar. 4, 2015)

What is it? The bioaugmentation is an innovative technology which consists in an increase of selected bacteria to help naturally the biological process of organic compounds degradation. It is proper to dose in any effluent type and wastewater treatment system, which no longer has enough capacity or has an inefficient performance. These products ...

Photoreactivation and subsequent solar disinfection of Escherichia coli in UV-disinfected municipal wastewater under natural conditions

by IWA Publishing  (Jan. 30, 2015)

Photoreactivation of ultraviolet (UV)-disinfected wastewater of different qualities was experimentally assessed. Photoreactivation ability of secondary effluent and microstrained inflow was analyzed in different samples of 50 mL (Petri dish) and 7,000 mL volume to describe open channel effluent situations of wastewater treatment plants in a more ...

Stability of alumina, ceria, and silica nanoparticles in municipal wastewater

by IWA Publishing  (Nov. 18, 2014)

Inorganic oxide nanoparticles (NPs) are used in semiconductor manufacturing operations such as wafer chemical–mechanical planarization (CMP). Understanding the stability of NPs in municipal wastewater is essential for the evaluation of the fate of NPs released to municipal wastewater treatment plants (WWTPs). This study aimed to evaluate ...

Population dynamics of filamentous bacteria identified in Polish full-scale wastewater treatment plants with nutrients removal

by IWA Publishing  (Mar. 16, 2015)

A comprehensive study of the identity and population dynamics of filamentous bacteria in five Polish full-scale municipal wastewater treatment plants (WWTPs) with nutrients removal had been carried out for 2 years. A quantitative culture-independent, molecular method – fluorescence in situ hybridization – was applied to evaluate ...

Dissolved air flotation separation for pretreatment of membrane bioreactor in domestic wastewater treatment

by IWA Publishing  (Feb. 23, 2015)

Due to requiring higher water quality standards over time, new technologies are being employed for wastewater treatment. Dissolved air flotation (DAF) and membrane bioreactor (MBR) technologies are widely employed as new technologies in wastewater treatment. DAF is used due to its excellent separation capability of suspended solids as well as ...

Water and wastewater treatment for Solar industry

by EnviroChemie GmbH Technology for Water  (Jan. 16, 2015)

Solar cells arc manufactured in a complex process thai requires enormous know-how. The objective is to produce panels with a high level of efficiency at low cost. To achieve this, different production processes are used. A fundamental distinction is made between solar cells on the basis of silicon wafers and thin-film cells, in which a special ...

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