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.

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.

MODELLING OF FULL-SCALE WASTEWATER TREATMENT PLANTS: HOW DETAILED SHOULD IT BE?

1994 ◽  
Vol 30 (2) ◽  
pp. 141-147 ◽  
Author(s):  
Bruce Watson ◽  
Mark Rupke ◽  
Imre Takács ◽  
Gilles Patry
Keyword(s):  
Wastewater Treatment ◽  
Large Scale ◽  
Wastewater Treatment Plants ◽  
Real Life ◽  
Dynamic Modelling ◽  
Optimal Level ◽  
Full Scale ◽  
Process Models ◽  
Data Availability ◽  
Process Unit

Dynamic mathematical modelling of full-scale wastewater treatment plants requires an optimal level of detail to be accurate, effective, but still manageable. Single process models tend to oversimplify the complexities of a large-scale plant and result in erroneous calibrated parameter values or limited predictive power for the model – on the other hand, modelling of every process and process unit is usually impractical, since it cannot be supported by reliable plant data, and requires prohibitive sampling costs and effort. Level of aggregation, settler dimensionality and reactivity, and plug-flow hydraulics were investigated with the help of a sophisticated dynamic modelling package. The results show that there is no general rule or global ‘optimal level’ of modelling – the required modelling detail is a function of influent flow and loading levels, and processes to be simulated (BOD removal, nitrification-denitrification, biological phosphorus removal, settling). In the case of real-life plants, supportable modelling level is often constrained by data availability and reliability.

Extended statistical entropy analysis (eSEA) for improving the evaluation of Austrian wastewater treatment plants

2013 ◽  
Vol 67 (5) ◽  
pp. 1051-1057 ◽  
Author(s):  
A. Sobańtka ◽  
H. Rechberger
Keyword(s):  
Wastewater Treatment ◽  
Cost Efficiency ◽  
Biological Treatment ◽  
Wastewater Treatment Plants ◽  
Removal Rate ◽  
Entropy Analysis ◽  
Statistical Entropy ◽  
N Removal ◽  
Cost Efficient ◽  
Biological Treatment Process

Extended statistical entropy analysis (eSEA) is used to evaluate the nitrogen (N) budgets of 13 Austrian wastewater treatment plants (WWTPs). The eSEA results are then compared to the WWTPs specific N-removal rates. Among the five WWTPs that achieve a removal rate of 75% the eSEA detects significant differences in the N-performance. The main reason for this is that eSEA considers all N-species and seems to be more discriminating than the N-removal rate. Additionally, the energy consumption and the costs of the mechanical–biological treatment process are related to the N-performance according to the eSEA. The influence of the WWTP size on the energy- and cost-efficiency of the N-treatment is investigated. Results indicate that energy-efficiency does not necessarily coincide with cost-efficiency. It is shown that smaller WWTPs between 22,000 PE (population equivalents) and 50,000 PE can be operated as energy-efficiently as larger WWTPs between 100,000 and 1,000,000 PE. On average, the smaller plants operate less cost-efficiently than the large ones. This research offers a new method for the assessment of the N-performance of WWTPs, and suggests that small WWTPs are not necessarily less energy- and cost-efficient than large ones.

scholarly journals Effect of Spathiphyllum blandum on the removal of ibuprofen and conventional pollutants from polluted river water, in fully saturated constructed wetlands at mesocosm level

2020 ◽  
Vol 18 (2) ◽  
pp. 224-228
Author(s):  
Luis Sandoval ◽  
José Luis Marín-Muñíz ◽  
Jacel Adame-García ◽  
Gregorio Fernández-Lambert ◽  
Florentina Zurita
Keyword(s):  
River Water ◽  
Constructed Wetlands ◽  
Large Scale ◽  
Wastewater Treatment Plants ◽  
Oxygen Demand ◽  
Climatic Conditions ◽  
Global Network ◽  
Large Scale Systems ◽  
Polluted River ◽  
Generous Support

Abstract In this study, the effect of Spathiphyllum blandum on the removal of ibuprofen (IB) and conventional pollutants such as chemical oxygen demand (COD), total nitrogen (TN), ammonium (NH4+-N), total phosphorus (TP), and total suspended solids (TSS) is reported; this, through its use as an emergent vegetation in fully saturated (FS) constructed wetlands (CWs) at mesocosm level treating polluted river water. With the exception of TP and COD, it was found that for TN (12%), NH4+-N (11%), TSS (19%), and IB (23%), the removals in systems with vegetation were superior to systems without vegetation (p < 0.05). These findings demonstrate the importance of the species S. blandum, in particular, for the removal of ibuprofen, which is an anti-inflammatory drug commonly found in effluents of wastewater treatment plants. Thus, the results obtained provide information that can be used for the design of future efficient large-scale systems using a new ornamental species, mainly under tropical climatic conditions. This article has been made Open Access thanks to the generous support of a global network of libraries as part of the Knowledge Unlatched Select initiative.

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.

Acidification of primary sludge to promote increased biological phosphorus elimination and denitrification

2000 ◽  
Vol 41 (9) ◽  
pp. 163-170 ◽  
Author(s):  
B. Teichgräber
Keyword(s):  
Wastewater Treatment ◽  
Biological Treatment ◽  
Large Scale ◽  
Laboratory Experiments ◽  
Wastewater Treatment Plants ◽  
Primary Sludge ◽  
Important Measure ◽  
Carbonic Acids ◽  
Biological Phosphorus

The acidification of primary sludge is an important measure to promote increased biological P elimination and denitrification at wastewater treatment plants. In laboratory experiments and at large-scale plants it has been found that the COD in the influent of biological treatment stages can be increased by 10–15% in the form of easily degradable carbonic acids. However, the operation of acidification thickeners leads to odour problems, as well as to considerable problems in terms of safety, in covered tanks.

Pilot and Full-Scale Treatment Experiences on Paper Mill Effluents

1990 ◽  
Vol 22 (9) ◽  
pp. 255-263
Author(s):  
I. Ozturk ◽  
V. Eroglu ◽  
I. Toröz
Keyword(s):  
Wastewater Treatment Plants ◽  
Removal Rate ◽  
Oxygen Demand ◽  
Paper Mill ◽  
Pilot Scale ◽  
Full Scale ◽  
Paper Mill Effluents ◽  
Study Results ◽  
Biological Treatability

In this paper, biological treatability study results of a pilot-scale aerated lagoon treating white-waters from a mechanical groundwood-based pulp and paper mill, and long-term operating experiences on two full-scale aerated lagoon systems are presented. Biological treatability study was conducted in a 200 1 semi-pilot aerated lagoon. The results have shown that five-day Biochemical Oxygen Demand (BOD5) values are less than 50 mg/l for a hydraulic retention time of 5 days. BOD removal rate constant (K) was found as 1.01 per day for 20°C. Bioassay tests were also conducted to evaluate the toxic impacts of white-waters on receiving waters and 96 hours median tolerance level TL(96), was found as 84% for species Lapistes reticularis. Long-term operating results from two full-scale wastewater treatment plants for paper mill effluents are also presented.

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.

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