Search results for "Wastewater"

Biogas production from meat and pulp and paper industry by-products

2014

Applying anaerobic digestion for onsite treatment of domestic wastewater and biowaste at low temperature in Finland - considering the Chinese experie…

2009

Ocena ścieków browarnianych w wybranych punktach linii technologicznej

2016

Źródłem ścieków browarnianych są: warzelnia, fermentownia, leżakownia, rozlewnia oraz miejsce mycia opakowań. W zależności od etapu produkcyjnego ścieki te cechują zróżnicowane parametry mikrobiologiczne i fizykochemiczne. Ze względu na dużą zawartość substancji organicznych mogą one stanowić pożywkę dla różnych grup mikroorganizmów. Celem badań była ocena mikrobiologiczna ścieków browarnianych w trzech różnych punktach linii technologicznej ze szczególnym uwzględnieniem obecności mikroorganizmów potencjalnie chorobotwórczych. Materiał badawczy stanowiły ścieki pobrane z komór zbierających ścieki 1 i 2 oraz kolektora przy wylocie do rzeki. Badania mikrobiologiczne obejmowały oznaczenia ogól…

Identification and quantification of microbial populations in activated sludge and anaerobic digestion processes

2014

Eight different phenotypes were studied in an activated sludge process (AeR) and anaerobic digester AnD) in a full-scale wastewater treatment plant by means of fluorescent in situ hybridization (FISH) and automated FISH quantification software. The phenotypes were ammonia-oxidizing bacteria, nitrite-oxidizing bacteria, denitrifying bacteria, phosphate-accumulating organisms (PAO), glycogen-accumulating organisms (GAO), sulphate-reducing bacteria (SRB), methanotrophic bacteria and methanogenic archaea. Some findings were unexpected: (a) Presence of PAO, GAO and denitrifiers in the AeR possibly due to unexpected environmental conditions caused by oxygen deficiencies or its ability to survive …

UCT-MBR vs IFAS-UCT-MBR for Wastewater Treatment: A Comprehensive Comparison Including N2O Emission

2017

In this study the performance (in terms of carbon and nutrient removal) and N2O emission of two plant configurations adopting innovative technologies were investigated. With this regards, an University Cape Town (UCT) membrane bioreactor (MBR) plant and an Integrated Fixed Film Activated Sludge (IFAS) -UCT-MBR plant were monitored. Both plants treat real wastewater under two different values of the influent carbon nitrogen ratio (C/N = 5 mgCOD/mgN and C/N = 10 mgCOD/mgN). Results have shown the highest carbon and nutrients removal efficiencies for the IFAS-UCT-MBR configuration during both the two investigated C/N values. Furthermore, the lowest N2O emission occurred for the IFAS-UCT-MBR.

Biosorption of lead(II), zinc(II) and nickel(II) from industrial wastewater by Stenotrophomonas maltophilia and Bacillus subtilis

2015

Abstract The biosorption of Pb(II), Zn(II) and Ni(II) from industrial wastewater using Stenotrophomonas maltophilia and Bacillus subtilis was investigated under various experimental conditions regarding pH, metal concentration and contact time. The optimum pH values for the biosorption of the three metals were in the range 5.0-6.0, while the optimal contact time for the two bacterial species was 30 min. Experimental data was analyzed using Langmuir and Freundlich isotherms; the former had a better fit for the biosorption of Pb(II), Zn(II) and Ni(II). The maximum adsorption uptakes (qmax) of the three metals calculated from the Langmuir biosorption equation for S. maltophilia were 133.3, 47.…

Effect of substituted phenols on transaminase activity in the fish,Leuciscus idus melanotus L.

1986

Evaluation of biomass activity and wastewater characterization in a UCT-MBR pilot plant by means of respirometric techniques

2011

Abstract Over the last two decades, Membrane Bioreactors (MBRs) emerged even more for wastewater treatment, ensuring high removal efficiencies as well as very small footprint requirements. Indeed, in this kind of process, a modification in biomass activity and viability can exist compared to that of a CAS process. In this context, respirometric analysis represents a reliable tool in order to evaluate the actual biomass kinetic parameters, to insert in mathematical models in the design phase, as well as to monitor the biomass viability, especially when these processes are operated with high SRT values. The paper presents some results of respirometric techniques applied for the characterisati…

Model ecosystem for environmental transport of xenobiotics

1982

A compartmentalized aquatic-terrestrial flow-through model ecosystem was constructed for studying the transport of agricultural chemicals from the soil to the aquatic environment in soil drainage. Factors were investigated on the fate of reference toxicant,14C-DDT, in the subsystems of the model. The behavior of DDT corresponds to its behavior in natural soil/water systems. The soil, acting as a reservoir, retained most of the DDT. The transportation of DDT to the aquatic compartment was negligible, with low availability to the aquatic biota. Because of the dynamic nature of the model, variation was evident between and within model units.

Spatial differences and temporal changes in illicit drug use in Europe quantified by wastewater analysis

2014

Aims To perform wastewater analyses to assess spatial differences and temporal changes of illicit drug use in a large European population. Design Analyses of raw wastewater over a 1-week period in 2012 and 2013. Setting and Participants Catchment areas of wastewater treatment plants (WWTPs) across Europe, as follows: 2012: 25 WWTPs in 11 countries (23 cities, total population 11.50 million); 2013: 47 WWTPs in 21 countries (42 cities, total population 24.74 million). Measurements Excretion products of five illicit drugs (cocaine, amphetamine, ecstasy, methamphetamine, cannabis) were quantified in wastewater samples using methods based on liquid chromatography coupled to mass spectrom…