Tertiary treatment of Berlin WWTP effluents with ferrate (Fe(VI))

2013 ◽  
Vol 68 (7) ◽  
pp. 1665-1671 ◽  
Author(s):  
U. Hübner ◽  
M. Jekel
Keyword(s):  
Surface Waters ◽  
Major Product ◽  
Advanced Treatment ◽  
Dual Function ◽  
Secondary Effluent ◽  
Tertiary Treatment ◽  
Efficient Removal ◽  
Promising Alternative ◽  
Secondary Effluents ◽  
The Eu

New and higher standards in the EU water framework directive necessitate advanced treatment of secondary effluents for reduction of trace organic compounds (TrOCs) and nutrients before the discharge into receiving surface waters. Due to its dual function as oxidant and coagulant, ferrate is considered as a promising alternative for tertiary treatment. The oxidation of selected TrOCs and simultaneous flocculation of phosphates by ferrate was tested in batch experiments with secondary effluent from Berlin Ruhleben. The concentrations of carbamazepine (CBZ) and diclofenac were reduced by >90% with ferrate dosages of 6 mg/L as Fe. CBZ was transformed to 1-(2-benzaldehyde)-4-hydro-(1H,3H)-quinazoline-2-one, which is known as the major product from the reaction of CBZ with ozone. In contrast to ozonation, no further transformation of this product was observed. The concentration of ibuprofen was not reduced by ferrate treatment. For efficient removal of 60–100 μg/L phosphate-P to values <20 μg/L, ferrate dosages of 3–4 mg/L as Fe were sufficient.

Assessing the energy and environmental performance of algae-mediated tertiary treatment of estrogenic compounds

2015 ◽  
Vol 17 (2) ◽  
pp. 421-428 ◽  
Author(s):  
Lisa M. Colosi ◽  
Eleazer P. Resurreccion ◽  
Yongli Zhang
Keyword(s):  
Wastewater Treatment ◽  
Steroid Hormones ◽  
Environmental Performance ◽  
Large Scale ◽  
Municipal Wastewater ◽  
Secondary Effluent ◽  
Municipal Wastewater Treatment ◽  
Tertiary Treatment ◽  
Efficient Removal ◽  
Estrogenic Compounds

This study uses a systems-level modeling approach to illustrate a novel synergy between municipal wastewater treatment and large-scale algaculture for production of bio-energy, whereby algae-mediated tertiary treatment provides efficient removal of unregulated, strongly estrogenic steroid hormones from the secondary effluent.

scholarly journals Options and limitations of hydrogen peroxide addition to enhance radical formation during ozonation of secondary effluents

2014 ◽  
Vol 5 (1) ◽  
pp. 8-16 ◽  
Author(s):  
U. Hübner ◽  
I. Zucker ◽  
M. Jekel
Keyword(s):  
Hydrogen Peroxide ◽  
Treatment Options ◽  
Radical Formation ◽  
Secondary Effluent ◽  
Soil Aquifer Treatment ◽  
Batch Experiments ◽  
Efficient Removal ◽  
Potable Reuse ◽  
Secondary Effluents ◽  
Pre Treatment

The oxidation of secondary effluent with ozone and O3/H2O2 (peroxone) was evaluated in batch experiments as pre-treatment for soil aquifer treatment for non-potable reuse purposes. The addition of hydrogen peroxide improved the reduction of ozone-resistant compounds with an optimized radical formation at 0.5 mol H2O2/mol O3. However, the improvement of radical formation was shown to be limited to approximately 30–40% independent from ozone dosage. Also a preozonation step did not accelerate efficiency of subsequent peroxone treatment. Thus, other treatment options, such as an increase of ozone dosages, need to be considered for more efficient removal of ozone-resistant compounds. However, the peroxone process might still be a promising option for oxidation of bromide containing effluents, since a reduction of bromate formation can allow the application of higher ozone dosages.

Viruses and Water: Problems, Detection, and Control

1993 ◽  
Vol 27 (7-8) ◽  
pp. 127-133 ◽  
Author(s):  
H. Dizer ◽  
J. Dürkop ◽  
A. Grohmann ◽  
H. Kopecka ◽  
J. M. López-Pila
Keyword(s):  
Drinking Water ◽  
Surface Waters ◽  
Membrane Filtration ◽  
Wastewater Treatment Plants ◽  
Health Hazard ◽  
Primary Source ◽  
Detection Methods ◽  
Secondary Effluent ◽  
Naturally Occurring ◽  
Water Problems

Secondary effluent of wastewater treatment plants contains a high number of viruses and other pathogens, which pose a health risk to the population, (especially when receiv ng waters are used for bathing and swimming, or for growing shellfish. In areas with a high density of population, where drinking water supply is dependent on surface waters and contaminated rivers are the primary source of drinking water, failure of the filtration or of the disinfection step, or of any other “barriers” supposed to warrant safe potable water, will increase the risk of health hazard for the consumer. We have compared the efficiency of viral elimination in secondary effluent by flocculation, uv rradiation and membrane filtration taking naturally occurring, or additionally seeded f2 phages, as indicator for viruses. Flocculation decreased the number of phages present in secondary effluent by more than two logs. If combined with uv irradiation, the elimination reached five additional logs. Membrane filtration eliminated essentially all naturally occurring phages. Improvement of the quality of surface waters calls for a refinement of detection methods for viruses. We have found that the polymerase chain reaction (PCR) might be used for detecting viruses in surface waters.

Advanced treatment for impaired water supplies: when advanced oxidation systems are the best option

2011 ◽  
Vol 6 (4) ◽  
Author(s):  
J. Collins ◽  
C. Cotton ◽  
M. MacPhee
Keyword(s):  
Surface Waters ◽  
Advanced Oxidation Processes ◽  
Advanced Oxidation ◽  
Advanced Treatment ◽  
Water Supplies ◽  
Oxidation Processes ◽  
Sustainable Water Supply ◽  
The World ◽  
Quenching Method ◽  
Impaired Water

As drought becomes pervasive around the world, many water suppliers are turning to water supplies once avoided – contaminated surface waters and groundwaters and wastewater. These water supplies are now a valuable part of a sustainable water supply; however, advanced treatment with advanced oxidation processes (AOPs) is typically needed to address trace contaminants in these supplies. This paper will address the following questions: 1) What is the best AOP technology for a given application? 2) Are there oxidation byproducts of concern? 3) What is the best peroxide quenching method? 4) How cost competitive are AOPs?

scholarly journals Sustainable Water Management in Iraq (Kurdistan) as a Challenge for Governmental Responsibility

Water ◽  
2018 ◽  
Vol 10 (11) ◽  
pp. 1651 ◽  
Author(s):  
Mahmood Yousuf ◽  
Nada Rapantova ◽  
Jalal Younis
Keyword(s):  
Water Management ◽  
Water Resources ◽  
Surface Waters ◽  
Local Level ◽  
Environmental Legislation ◽  
Eu Member States ◽  
State Of Water ◽  
Legislative Framework ◽  
Local Water ◽  
The Eu

During the last few decades, a critical scarcity of water has occurred in the Middle East due to climate change and the mismanagement of water resources. The situation is complicated by the absence of an effective legislative framework at the local level as well as by the incapability and disrepute of the local water authorities. Most Iraqi citizens depend on the surface waters of the Tigris and Euphrates rivers, which have their sources in upstream neighbouring countries. Water crises concerning the shared waters urgently require a solution at the international level. Unfortunately, Iraq has faced several wars in a row (1980–2003), which has prevented the country from establishing its institutions. The rapid increase in the population of the transboundary countries on the Tigris and Euphrates rivers, and the high demands on agriculture, are accelerating water exploitation. In this paper, the present state of water management in Iraq from the viewpoint of the legislative framework, water balance, and transboundary issues will be discussed, with special attention to Kurdistan. Many legislative documents have been established or amended by the Iraqi and Kurdistan parliaments since 2003. In 2015, the Kurdistan Government Ministry of Agriculture and Water Resources, in cooperation with the EU, issued a guide for environmental legislation related to all environmental components such as air, water, and soil. The recommendations on actions needed in the water management in Kurdistan will be presented; they are inspired by the Water Framework Directive (WFD) (2000/60/EC) implemented in EU member states.

Efficient removal of methyl orange using Cu2O as a dual function catalyst

2018 ◽  
Vol 444 ◽  
pp. 559-568 ◽  
Author(s):  
Fan Zhang ◽  
Guohui Dong ◽  
Mian Wang ◽  
Yubin Zeng ◽  
Chuanyi Wang
Keyword(s):  
Methyl Orange ◽  
Dual Function ◽  
Efficient Removal

scholarly journals Necessary borders for negotiation: the role of translation

2017 ◽  
Vol 9 (2) ◽  
pp. 64
Author(s):  
David Ar Rouz
Keyword(s):  
Language Learning ◽  
Dual Function ◽  
European Language ◽  
Social Distinction ◽  
European Institutions ◽  
The Social ◽  
Translation Services ◽  
Migration Flows ◽  
The Eu

Translation is usually deemed to help bridge gaps but seldom thought of as a means of strengthening or, at least, highlighting borders. The present article uses the example of translations involving the Breton language in order to show that translation may favour negotiation by both helping negotiators to understand each other and having them recognise the social border that makes them different. The article explains firstly the author’s understanding of borders and negotiation. Secondly, the case of translation from and into Breton is examined. And finally, the discussion is extended to the European institutions, where European language policy also illustrates the dual function of translation in negotiation. The example of Breton evidences that translation fosters social distinction, language development and cooperation. At the EU level, the same roles are assumed by translation services and they contribute moreover to the legitimacy of the institutions and to the exercise of democracy. Such a conclusion invites to consider translation as an adequate means to manage language and cultural differences, even compared to language learning. It may be used, then, to deal with pressing issues such as the current migration flows to Europe.

Advanced Treatment of Coking Wastewater by Coagulation with PAC

2010 ◽  
Vol 159 ◽  
pp. 499-504 ◽  
Author(s):  
Yi Zheng ◽  
Zhuo Zhang ◽  
Hong Tao Hu ◽  
Xia Liang Wei
Keyword(s):  
Reaction Time ◽  
Optimal Condition ◽  
High Speed ◽  
Dynamic Condition ◽  
Advanced Treatment ◽  
Coking Wastewater ◽  
Efficient Removal ◽  
Low Speed ◽  
Integrated Technique

An integrated technique was investigated, aiming to provide an effective method for the treatment of biologically treated coking wastewater and to reduce pollutants to concentration values below the limits imposed by the legislation. Coking wastewater containing 270 mg/L COD and 202 times color was treated by coagulation using PAC as well as PAC +PAM, respectively. The application of coagulation using PAC+PAM resulted to a much more efficient removal of color, COD and SS in comparison with single coagulation without PAC. The optimal condition for coagulation with PAC was pH 8, dosage 75 mg/L and dynamic condition 1-minute high speed stirring followed by 15-minute low speed stirring. The optimal condition for coagulation with PAC and PAM was: PAM dosage of 6 mg/L, PAC dosage of 70 mg/L, pH of 8 and reaction time of 20 minutes. Both processes of coagulation were found to be efficient for removal of COD from coking wastewater, but ineffective in reducing color.

scholarly journals Advanced phosphorus removal via coagulation, flocculation and microsieve filtration in tertiary treatment

2017 ◽  
Vol 75 (12) ◽  
pp. 2875-2882 ◽  
Author(s):  
M. Langer ◽  
J. Väänänen ◽  
M. Boulestreau ◽  
U. Miehe ◽  
C. Bourdon ◽  
...  
Keyword(s):  
Phosphorus Removal ◽  
Treatment Plant ◽  
Mesh Size ◽  
Secondary Effluent ◽  
Tertiary Treatment ◽  
Mixing Conditions ◽  
Viable Option ◽  
Polyaluminum Chloride ◽  
Effluent Quality ◽  
Coagulation And Flocculation

The applicability of microsieve technology together with coagulation and flocculation for advanced phosphorus removal was investigated. A pilot unit including a microsieve with 10 μm mesh size was operated continuously with secondary effluent from Ruhleben wastewater treatment plant in Berlin. By applying a pretreatment of 0.07–0.09 mmol/L (as metal) coagulant and 1.5–2 mg/L cationic polymer, total phosphorus values below 80 μg/L were achieved. Coagulation with polyaluminum chloride (PACl) produced a better effluent quality compared to FeCl3, as less suspended solids and less residual coagulant were found in the microsieve effluent. In addition, the transmittance of UV radiation through the water was improved by using PACl. The produced amount of backwash water was always below 3% (on average 1.6%). Under optimized mixing conditions, polymer doses of 0.6 mg/L were possible without losses in water quality and filtration performance. Microsieving with chemical pretreatment is a viable option for high quality effluent polishing.

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