scholarly journals Performance of retention soil filters for the reduction of hygienically-relevant microorganisms in combined sewage overflow and treated wastewater

2020 ◽  
Vol 81 (3) ◽  
pp. 535-543 ◽  
Author(s):  
N. Zacharias ◽  
S. M. Essert ◽  
A. F. Brunsch ◽  
E. Christoffels ◽  
T. Kistemann ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Surface Water ◽  
Large Scale ◽  
Municipal Wastewater ◽  
Water Bodies ◽  
Treated Wastewater ◽  
Test Facility ◽  
Resistant Bacteria ◽  
Limit Values ◽  
Surface Water Bodies

Abstract Environmental quality standards for surface waters have been significantly expanded through recent amendments to German regulations. Limit values are only established for applicable regulations if the water is indicated for certain uses, e.g. abstraction of irrigation water. Nevertheless, surface water bodies are often used for hygiene-sensitive purposes. In the course of climate change, stronger precipitation events will occur, which may lead to more frequent loading and discharge of combined sewer overflow (CSO) into surface water bodies. Retention soil filters (RSFs) are attracting attention as an extensive treatment technology for CSO and additional wastewater treatment. This study examined large-scale RSFs for CSO treatment, as well as the effectiveness of RSFs as a fourth purification stage. An RSF test facility was established at a municipal wastewater treatment plant (WWTP), consisting three semi-technical RSFs that were fed exclusively with treated water from the WWTP. The reduction of microorganisms mostly occurred within the first centimeters of the RSFs. For most hygienic-microbiological parameters, a 1–2 log unit reduction could be detected in addition to the reduction within the WWTP. Antibiotic-resistant bacteria were reduced to the same extent. Investigation of the large-scale RSFs showed that a flow rate reduced by half corresponded to better reduction performances.

scholarly journals Following the Water: Characterising de facto Wastewater Reuse in Agriculture in the Netherlands

2019 ◽  
Vol 11 (21) ◽  
pp. 5936 ◽  
Author(s):  
Jack E. Beard ◽  
Marc F.P. Bierkens ◽  
Ruud P. Bartholomeus
Keyword(s):  
Surface Water ◽  
The Netherlands ◽  
Wastewater Reuse ◽  
Water Bodies ◽  
Treated Wastewater ◽  
Agricultural Irrigation ◽  
Quality Model ◽  
Dry Conditions ◽  
De Facto Reuse ◽  
Surface Water Bodies

De facto (or indirect) wastewater reuse is the practice of extracting from surface water bodies which are impacted by treated wastewater (TWW) for anthropogenic use. The extent to which surface water bodies in the Netherlands are impacted by TWW is poorly understood, and the distribution of de facto reuse even more so. This study addresses these knowledge gaps, with a focus on reuse for agricultural irrigation. This is achieved via a novel application of the Water Framework Directive (WFD) Explorer water quality model, allowing for the distribution of different flow components—namely TWW and flow from transboundary rivers—to be discerned for the national surface water network. When paired with data on surface water extractions for irrigation, this identifies notable areas of de facto reuse. Results show that during dry conditions, TWW is a significant flow component in many surface water bodies, particularly in smaller streams located close to WWTPs. De facto reuse is indicated as widespread, with several key areas identified in which extractions are from impacted surface water bodies. This study represents a first attempt to directly link TWW emissions to agricultural irrigation, highlighting a mechanism by which wastewater-associated contaminants can propagate through the hydrological system.

scholarly journals Fate and Removal of Pharmaceuticals and Illegal Drugs Present in Drinking Water and Wastewater

2017 ◽  
Vol 24 (1) ◽  
pp. 65-85 ◽  
Author(s):  
Anna Szymonik ◽  
Joanna Lach ◽  
Krystyna Malińska
Keyword(s):  
Drinking Water ◽  
Wastewater Treatment ◽  
Surface Water ◽  
Municipal Wastewater ◽  
Wastewater Treatment Plants ◽  
Rapid Development ◽  
Diclofenac Sodium ◽  
Clofibric Acid ◽  
Treated Wastewater ◽  
Illegal Drugs

Abstract Rapid development of pharmaceutical industry, and thus widespread availability of different types of therapeutical and increased intake of pharmaceuticals, results in elevated concentrations of pharmaceuticals in municipal wastewater subjected to treatment in wastewater treatment plants. Pharmaceuticals present in raw wastewater discharged from hospitals, households, veterinary and health care clinics eventually end up in wastewater treatment plants. Commonly applied methods for treating wastewater do not allow complete removal of these contaminants. As a consequence, pharmaceuticals still present in treated wastewater are introduced to water environment. The most frequently identified pharmaceuticals in surface water belong to the following groups: non steroidal anti inflammatory drugs, beta-blockers, estrogens and lipid regulators. The most difficult is removal of diclofenac, clofibric acid and carbamazepine as these substances show low biodegradability. Diclofenac can be removed in the process of wastewater treatment by 40%, carbamazepine by 10%, and clofibric acid from 26 to 50%. The presence of diclofenac sodium in the rivers in Poland was confirmed and the concentrations were following: 380 ng/dm3 (the Warta river), 470 ng/dm3 (the Odra river), 140 ng/dm3 (the Vistula river). Naproxene was found in the Warta river at the concentration of 100 ng/dm3. The presence of pharmaceuticals in surface water can be toxic to aqueous microorganisms and fish. Recent studies confirmed also the presence of pharmaceuticals in drinking water. This is considered as a problem especially in urban agglomerations such as Berlin or large cities in Spain and China. The studies showed that pharmaceuticals were also identified in the samples taken from the Polish rivers and drinking water. The presence of naproxene and diclofenac at the concentrations of 13 and 4 ng/dm3 was identified in drinking water sampled from water intakes in Poznan. Surface water and drinking water showed also the presence of illegal drugs.

scholarly journals The occurrence of antibiotic-resistant bacteria, including Escherichia coli, in municipal wastewater and river water

2019 ◽  
Vol 100 ◽  
pp. 00061 ◽  
Author(s):  
Adriana Osińska ◽  
Ewa Korzeniewska ◽  
Monika Harnisz ◽  
Sebastian Niestępski ◽  
Piotr Jachimowicz
Keyword(s):  
Escherichia Coli ◽  
Wastewater Treatment ◽  
River Water ◽  
Municipal Wastewater ◽  
High Efficiency ◽  
Treated Wastewater ◽  
Resistant Bacteria ◽  
Antibiotic Resistant Bacteria ◽  
Antibiotic Resistant ◽  
E Coli

Wastewater treatment plants (WWTPs) are major reservoirs of antibiotic-resistant bacteria (ARB) which are transported to the natural environment with discharged effluents. Samples of untreated wastewater (UWW) and treated wastewater (TWW) from four municipal WWTPs and samples of river water collected upstream (URW) and downstream (DRW) from the effluent discharge point were analyzed in the study. The total counts of bacteria resistant to β-lactams and tetracyclines and the counts of antibiotic-resistant Escherichia coli were determined. Antibiotic-resistant bacteria, including antibiotic-resistant E. coli, were removed with up to 99.9% efficiency in the evaluated WWTPs. Despite the above, ARB counts in TWW samples were high at up to 1.25x105 CFU/mL in winter and 1.25x103 CFU/mL in summer. Antibiotic-resistant bacteria were also abundant (up to 103 CFU/ml) in URW and DRW samples collected in winter and summer. In both UWW and TWW samples, the counts of ARB and antibiotic-resistant E. coli were at least one order of magnitude lower in summer than in winter. The study revealed that despite the high efficiency of bacterial removal in the wastewater treatment processes, considerable amounts of ARB are released into the environment with TWW and that the percentage of ARB in total bacterial counts increases after wastewater treatment.

scholarly journals Scientific rationale of measures on prevention of pollution of surface water bodies in Kharkiv region

2020 ◽  
Vol 82 (1) ◽  
pp. 99-105
Author(s):  
M.I. Lytvynenko ◽  
O.I. Zaliubovska ◽  
M.G. Shcherban ◽  
T.I. Tiupka ◽  
V.V. Zlenko ◽  
...  
Keyword(s):  
Surface Water ◽  
Water Bodies ◽  
Treated Wastewater ◽  
Laboratory Studies ◽  
The Past ◽  
Chemical Indicators ◽  
Water Factor ◽  
Surface Water Bodies ◽  
Anthropogenic Loading ◽  
Microbiological Indicators

Today, in Kharkiv region, most of the surface water bodies as a result of man-made and anthropogenic loading have lost their natural purity and the ability to self-purify. One of the features of water resources of the region is that the rivers, which serve as the main sources of water supply, are also used as receivers of treated wastewater. In order to analyze the state of pollution of the aquifer of Kharkiv region during 2007–2016, laboratory studies of water of surface water reservoirs of the 1st and 2nd categories were conducted and summarized. The researchers have found that over the past 10 years the pollution of surface water bodies of the 1st category according to sanitary-chemical indicators is at the level of 4.5%, microbiological indicators – 14%, water pollution of reservoirs of the 2nd category is 20% and 12%, respectively. In order to prevent the occurrence of diseases of different etiology among the population of Kharkiv region, the source of which is the water factor, a set of methodical and practical measures that will contribute to the improvement of the surface water of the region has been developed

ENVIRONMENTAL ASPECTS OF WATER SUPPLY AND DRAINAGE AT THE ENTERPRISES OF THE TAMBOV INDUSTRIAL HUB

2020 ◽  
pp. 41-45
Author(s):  
Ryazanov A.V. ◽  
Mozharov A.V. ◽  
Zawershinskiy A.N.
Keyword(s):  
Wastewater Treatment ◽  
Surface Water ◽  
Water Supply ◽  
Negative Impact ◽  
Water Bodies ◽  
Toxic Waste ◽  
Treated Wastewater ◽  
Industrial Enterprises ◽  
Treatment Facilities ◽  
The City

One of the reasons for the current global environmental crisis is the intense anthropogenic impact on water bodies, which results in their depletion and pollution. The source of the negative impact is, in particular, insufficiently treated wastewater from industrial enterprises. Depending on the technological processes used, toxicants can enter the water bodies along with the effluents, which pose a serious threat to them. The aim of the work is to consider the features of water supply and wastewater disposal of enterprises that make up the industrial hub of the city of Tambov. The work used methods of analysis of technical documentation and statistical reporting characterizing the qualitative and quantitative composition of wastewater. Water supply of the considered enterprises is carried out from the city water supply network and own artesian wells. All enterprises do not have full-fledged treatment facilities capable of carrying out a full cycle of wastewater treatment with bringing them to a standard clean state. The use of galvanic technologies in production requires preliminary cleaning at local treatment facilities. Then the wastewater goes to the city wastewater treatment plant, where it is processed together with the municipal wastewater. Normally clean and storm water flows directly into the surface water body. The largest enterprise of the industrial hub pumps its industrial effluents into deep aquifers. Over the entire period of its operation, over 52 million m3 of liquid toxic waste was injected. As a result, a zone of contaminated groundwater was formed under the enterprise and adjacent territories. In them, the excess of the maximum permissible concentrations for a number of parameters is constantly noted. Thus, this enterprise is a source of powerful, direct negative impact on groundwater and, indirectly, on surface water. This led to the emergence of a zone of sustainable environmental risk.

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