نتایج جستجو برای: thermal effluent

تعداد نتایج: 228161  

Journal: :Aquatic toxicology 2005
Birgit Hoeger Bettina Hitzfeld Bernd Köllner Daniel R Dietrich Michael R van den Heuvel

The objective of the present study was to investigate the influence of chronic exposure to municipal sewage treatment effluent at environmentally relevant concentrations on immune parameters in rainbow trout (Oncorhynchus mykiss), including the assessment of potential differences in reactivity between sexually mature male and female fish. Trout were exposed to 1.5 and 15% (v/v) secondary treate...

Journal: :Water science and technology : a journal of the International Association on Water Pollution Research 2012
K Krishnasamy J Nair B Bäuml

The effluent from anaerobic digestion process has high concentrations of nutrients, particularly nitrogen, essential for plant growth but is not suitable for direct disposal or application due to high chemical oxygen demand (COD), low dissolved oxygen (DO), odour issues and is potentially phytotoxic. This research explored the optimum conditions of anaerobic effluent for application and dilutio...

2003
A. SHARIFF J.

A laboratory study was carried out to determine the effect of bark boiler ash on AOX concentration in bleach plant effluent. The removal of A O X was found not to be significant at typical daily discharge rates of boiler ash. To remove significant amounts of AOX, extremely large quantities of ash were required. When incremental quantities of ash were added to the bleach plant effluent, an incre...

2005
T. V. OTOKUNEFOR C. OBIUKWU

The physicochemical qualities of a refinery effluent and water and sediment of an effluent receiving water body were investigated. The treated refinery effluent contained very high concentrations of phenol (11.06 mg/l), oil and grease (7.52 mg/l), ammonia (8.52 mg/l), COD (91.76 mg/l), TDS (390.6 mg/l) and phosphate (6.2 mg/l), but low in sulphide, nickel, lead, copper and chromium, which were ...

2016

Industrial effluents, controversially, is one of the largest and major contributors of pollution in aquatic ecosystem and affects the aquatic organisms in general and fishes in particular. Several laboratory studies were conducted to evaluate the effects of both treated and untreated effluents on fish. The studies showed wide ranges of toxicity at organismal as well as at population levels. The...

2013
E. U. Etim P. C. Onianwa

The impact of industrial effluent on the Oruku River in southwestern region of Nigeria was investigated. Surface water, sediment, ground water and industrial effluent samples were obtained bimonthly for 18 months (March 2005 to September 2006). Effluent characteristics varied widely with averages of DO (4.25±1.3 mg/L), BOD (27.5±43 mg/L), Pb (0.41±0.26 mg/L), Cr (0.26±0.48 mg/L) and Ni (0.19±0....

2014
Rajaram S

Sugar Factory effluent is one of the most important moderate – high pollution concentration wastewater, which is generated mainly from the mill house washing activities of the sugar factory. The effluent is rich in organic matter resultant from the sugarcane juice, sugar syrup and sugar present in the washwater. The COD of this effluent is variable from 5000 – 10000 mg/L. The aim of the present...

2009
Patrícia Lopes de Oliveira Marta Cristina Teixeira Duarte Alexandre Nunes Ponezi Lúcia Regina Durrant

Bacillus pumilus and Paenibacillus sp. were applied on the paper mill effluent to investigate the colour remotion. Inocula were individually applied in effluent at pH 7.0, 9.0 and 11.0. The real colour and COD remotion after 48h at pH 9.0 were, respectively, 41.87% and 22.08% for B. pumilus treatment and 42.30% and 22.89% for Paenibacillus sp. Gel permeation chromatography was used to verify th...

Journal: :Environmental toxicology and chemistry 2005
Jacob K Stanley Bryan W Brooks Thomas W La Point

Laboratory single-species toxicity tests are used to assess the effects of contaminants on aquatic biota. Questions remain as to how accurately these toxicity tests predict site-specific bioavailability and chronic effects of metals, particularly in streams that are effluent-dominated or dependent on effluent discharge for flow. Concurrent 42-d Hyalella azteca exposures were performed with cadm...

2010

To develop a better understanding of the issues and best practices related to the use of treated effluent to help maintain river flows and habitat, the Conservancy commissioned a study to summarize the state of the science. The use of treated wastewater effluent is becoming a more prominent factor in Arizona’s overall water management strategy. Treated effluent contains a wide array of chemical...

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