scholarly journals Removal and transformation of pharmaceuticals in wastewater treatment plants and constructed wetlands

2013 ◽  
Vol 6 (2) ◽  
pp. 89-98 ◽  
Author(s):  
E. Lee ◽  
S. Lee ◽  
J. Park ◽  
Y. Kim ◽  
J. Cho
Keyword(s):  
Constructed Wetlands ◽  
Surface Waters ◽  
Biological Treatment ◽  
Wastewater Treatment Plants ◽  
Wastewater Effluent ◽  
Trace Organic Compounds ◽  
Initial Transformation ◽  
The Stability ◽  
Trace Organic ◽  
D Value

Abstract. Since trace organic compounds such as pharmaceuticals in surface water have been a relevant threat to drinking water supplies, in this study removal of pharmaceuticals and transformation of pharmaceuticals into metabolites were investigated in the main source of micropollutants such as WWTPs and engineered constructed wetlands. Pharmaceuticals were effectively removed by different WWTP processes and wetlands. Pharmaceutical metabolites with relatively low log D value were resulted in the low removal efficiencies compared to parent compounds with relatively high log D value, indicating the stability of metabolites. And the constructed wetlands fed with wastewater effluent were encouraged to prevent direct release of micropollutants into surface waters. Among various pharmaceuticals, different transformation pattern of ibuprofen was observed with significant formation of 1-hydroxy-ibuprofen during biological treatment in WWTP, indicating preferential biotransformation of ibuprofen. Lastly, transformation of pharmaceuticals depending on their structural position was investigated in terms of electron density, and, the electron rich C1 = C2 bond of carbamazepine was revealed as an initial transformation position.

scholarly journals Removal and transformation of pharmaceuticals in wastewater treatment plants and constructed wetlands

2013 ◽  
Vol 6 (1) ◽  
pp. 97-117 ◽  
Author(s):  
E. Lee ◽  
S. Lee ◽  
J. Park ◽  
Y. Kim ◽  
J. Cho
Keyword(s):  
Wastewater Treatment ◽  
Constructed Wetlands ◽  
Surface Waters ◽  
Biological Treatment ◽  
Wastewater Treatment Plants ◽  
Wastewater Effluent ◽  
Trace Organic Compounds ◽  
Initial Transformation ◽  
The Stability ◽  
D Value

Abstract. Since trace organic compounds such as pharmaceuticals in surface water have been a relevant threat to drinking water supplies, in this study the removal of pharmaceuticals and transformation of pharmaceuticals into metabolites were investigated in the main sources of micropollutants such as wastewater treatment plants (WWTPs) and engineered constructed wetlands. Pharmaceuticals were effectively removed by different WWTP processes and wetlands. Pharmaceutical metabolites with relatively low log D value resulted in the low removal efficiencies compared to parent compounds with relatively high log D value, indicating the stability of metabolites. And the constructed wetlands fed with wastewater effluent were encouraged to prevent direct release of micropollutants into surface waters. Among various pharmaceuticals, different transformation pattern of ibuprofen was observed with significant formation of 1-hydroxy-ibuprofen during biological treatment in WWTP, indicating preferential biotransformation of ibuprofen. Lastly, transformation of pharmaceuticals depending on their structural position was investigated in terms of electron density, and the electron rich C1 = C2 bond of carbamazepine was revealed as an initial transformation position.

Evaluation of Small Wastewater Treatment Plants in the County of Århus – Denmark

1993 ◽  
Vol 28 (10) ◽  
pp. 33-41
Author(s):  
Jes la Cour Jansen ◽  
Bodil Mose Pedersen ◽  
Erik Moldt
Keyword(s):  
Wastewater Treatment ◽  
Constructed Wetlands ◽  
Biological Treatment ◽  
Wastewater Treatment Plants ◽  
Chemical Precipitation ◽  
Common Type ◽  
Treatment Efficiency ◽  
Effluent Quality ◽  
Different Types

Influent and effluent data from about 120 small wastewater treatment plants (100 - 2000 PE) have been collected and processed. Seven different types of plants are represented. The effluent quality and the treatment efficiency have been evaluated. The most common type of plant is mechanical/biological treatment plants. Some of them are nitrifying and some are also extended for chemical precipitation of phosphorus. Constructed wetlands and biological sandfilters are also represented among the small wastewater treatment plants.

Investigation of a Full-Scale Anaerobic-Aerobic and Constructed Wetlands Integrated System Treating Livestock Wastewater

2010 ◽  
Vol 113-116 ◽  
pp. 1189-1194
Author(s):  
Yong Ming Wu ◽  
Jin Bao Wan ◽  
Ji Hai Xiong ◽  
Shun Fa Wang ◽  
Ping Gu
Keyword(s):  
Constructed Wetlands ◽  
Biological Treatment ◽  
Large Scale ◽  
Wastewater Treatment Plants ◽  
Removal Rate ◽  
Full Scale ◽  
Integrated System ◽  
Tertiary Treatment ◽  
Livestock Wastewater ◽  
Aerobic Process

A full-scale integrated system of the IOC-SBBR and CWs for the biological treatment of livestock wastewater was carried out in this study, the combined IOC-SBBR process had the removal rates of COD, NH4+-N, TN reached 96.5%, 89% and 81.1%, respectively. CWs were used for the further tertiary treatment of livestock wastewater, which the average removal rate of the NH4+-N and TN was 61.3% and 60.2%, the overall integrated system was superior to the direct anaerobic or aerobic process for the treatment of large-scale livestock wastewater, would provide the valuable design and operation for the livestock wastewater treatment plants.

scholarly journals The present situation and trends of wastewater treatment in small settlements and rural areas of Lithuania

2019 ◽  
pp. 243-250
Author(s):  
Regimantas Dauknys
Keyword(s):  
Wastewater Treatment ◽  
Activated Sludge ◽  
Surface Waters ◽  
Rural Areas ◽  
Biological Treatment ◽  
Wastewater Treatment Plants ◽  
Present Situation ◽  
Treatment Facilities ◽  
Biological Filters ◽  
Activated Sludge Systems

This article presents the wastewater treatment in small settlements and rural areas ofLithuania, including descriptions of capacity and loading of wastewater treatment plants(WWTPs), types of treatment facilities, and development trends of biological treatmentfacilities. In 2000 Lithuania had 597 WWTPs with capacity up to 1000 m3/d, 95% of them arethe biological treatment plants. Today the most of these WWTPs are unloaded due to thetendency to centralise wastewater treatment in rural areas of Lithuania that were in the eightand ninth decades.In small settlements and rural areas of Lithuania the aeration facilities are predominant. In theeight and ninth decades practically only the activated sludge systems were built. The situationbegan to change in the last decade of the last century: the biological filters and soil filtrationfacilities with discharge into surface waters were applied more frequently, so the building ofaeration facilities started to decrease.

scholarly journals Rapid direct injection LC-MS/MS method for analysis of prioritized indicator compounds in wastewater effluent

2015 ◽  
Vol 1 (5) ◽  
pp. 632-643 ◽  
Author(s):  
Tarun Anumol ◽  
Shimin Wu ◽  
Mauricius Marques dos Santos ◽  
Kevin D. Daniels ◽  
Shane A. Snyder
Keyword(s):  
Public Health ◽  
Drinking Water ◽  
Organic Compounds ◽  
Direct Injection ◽  
Water Sources ◽  
Wastewater Effluent ◽  
Trace Organic Compounds ◽  
Drinking Water Sources ◽  
Potential Risks ◽  
Trace Organic

Trace organic compounds (TOrCs) have been detected in drinking water sources for several years, raising concerns due to their potential risks to public health.

The Characteristics of Community Wastewater Biological Treatment Processes in Taiwan

1986 ◽  
Vol 18 (7-8) ◽  
pp. 289-296
Author(s):  
C. F. Ouyang ◽  
T. J. Wan
Keyword(s):  
Biological Treatment ◽  
Wastewater Treatment Plants ◽  
Oxygen Demand ◽  
Field Investigation ◽  
Oxidation Ditch ◽  
Trickling Filter ◽  
Rotating Biological Contactor ◽  
Treatment Processes ◽  
Treatment Characteristics ◽  
Sludge Thickening

This study investigated and compared the treatment characteristics of three different kinds of biological wastewater treatment plants (including rotating biological contactor, trickling filter and oxidation ditch) which are currently operated in Taiwan. The field investigation of this study concentrated on the following items: the performance of biological oxygen demand (BOD) and suspended solids (SS) removal; the sludge yield rate of BOD removal; the settleability of sludge solids; the properties of sludge thickening; the power consumption and land area requirement per unit volume of wastewater. Finally, based on the results of the field investigation, a comparison of the treatment characteristics of the three different biological treatment processes was evaluated.

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