scholarly journals Occurrence and Seasonal Variation of Microplastics in the Effluent from Wastewater Treatment Plants in Qingdao, China

2022 ◽  
Vol 10 (1) ◽  
pp. 58
Author(s):  
Fenghua Jiang ◽  
Menghui Wang ◽  
Jinfeng Ding ◽  
Wei Cao ◽  
Chengjun Sun
Keyword(s):  
Wastewater Treatment ◽  
Seasonal Variation ◽  
Polyethylene Terephthalate ◽  
Marine Environment ◽  
Wastewater Treatment Plants ◽  
The Other ◽  
Chlorinated Polyethylene ◽  
Average Value ◽  
Dominant Part ◽  
Polymer Type

Wastewater treatment plants (WWTPs) are considered as one of the important sources of microplastics (MPs) in the marine environment. In this paper, the characteristics of MPs in the effluent discharged from five WWTPs in Qingdao, China, in winter and summer were analyzed. The results showed that only fibers and fragments were observed, with fibers as a dominant part. Rayon was the most domain polymer type, followed by Polyethylene terephthalate (PET) and chlorinated polyethylene (CPE). The average sizes of fiber MPs were 1010 ± 924 µm and 610 ± 691 µm in winter and summer, respectively. The contents of rayon were higher in summer than in winter. More small and transparent MPs were observed in summer. Rayon abundances ranged from 4.1 to 19.9 items/L and 33.3 to 116.7 items/L, with 12.3 ± 5.6 items/L and 67.6 ± 30.6 items/L as the average value in winter and in summer, respectively. The abundances of other polymer type MPs were 7.23~19.65 items/L with average value of 12.7 ± 4.7 items/L in winter and 12.0~20.0 items/L with 16.8 ± 4.7 items/L in summer. The daily emissions were estimated as 8.38 × 109~4.25 × 1010 items (9.2~27.8 kg) for rayon and 8.0 × 109~1.2 × 1010 items (7.6~5.3 kg) discharged for the other polymer type MPs from the five WWTPs. The results indicated that the seasonal variation of characteristics and emission of MPs in the effluent from WWTPs was mainly caused by increasing discharge of rayon, which may relate to people’s living habits and tourism activities.

scholarly journals Emerging Compounds in Mexico: Challenges for Their Identification and Elimination in Wastewater

2020 ◽  
Author(s):  
José Gustavo Ronderos-Lara ◽  
Hugo Saldarriaga-Noreña ◽  
Pedro Guillermo Reyes-Romero ◽  
Luis Alberto Chávez-Almazán ◽  
Josefina Vergara-Sánchez ◽  
...  
Keyword(s):  
Public Health ◽  
Wastewater Treatment ◽  
Wastewater Treatment Plants ◽  
Industrial Applications ◽  
Emerging Pollutants ◽  
The Other ◽  
Personal Hygiene ◽  
Technological Infrastructure ◽  
Emerging Compounds ◽  
Concentration Levels

In recent years, the presence of organic pollutants has received great attention due to their effects on public health and biota. Within this set of compounds, a new range of compounds that are characterized by their high persistence and low degradation have been identified, called Emerging Compounds. Emerging pollutants include a wide variety of products for daily use of different structures, domestic and industrial applications, such as: pesticides, industrial and personal hygiene products, hormones, and drugs, most of which are toxic, persistent and bioaccumulative. A characteristic of these types of pollutants is that current wastewater treatment plants are unable to remove them; they are designed to remove organic matter and nutrients in higher concentrations. In Mexico there is little information on the concentration levels of these compounds, due to the lack of public policies aimed at providing resources to institutions and researchers trained to carry out this type of study. On the other hand, the technological infrastructure of the wastewater treatment plants is insufficient for the country’s demand. This situation represents one of the greatest challenges for the authorities responsible for the management of water resources, in the immediate time if it is intended to preserve said resource and therefore take care of the health of the population.

scholarly journals Seasonal Monitoring of Cardiovascular and Antiulcer Agents’ Concentrations in Stream Waters Encompassing a Capital City

2013 ◽  
Vol 2013 ◽  
pp. 1-9
Author(s):  
Renáta Varga ◽  
Iván Somogyvári ◽  
Zsuzsanna Eke ◽  
Kornél Torkos
Keyword(s):  
Wastewater Treatment ◽  
Seasonal Variation ◽  
Western Europe ◽  
Wastewater Treatment Plants ◽  
Sewage Treatment ◽  
Capital City ◽  
River Waters ◽  
Antiulcer Agents ◽  
Treatment Procedures ◽  
Stream Waters

Nowadays monitoring pharmaceutical residues from surface waters is a widespread analytical task. Most of the studies are conducted from river waters or sewage treatment plants and mainly in Western Europe or North America. Such studies are seldom published from Eastern Europe, especially from stream waters, even though the prescription and consumption patterns of drugs as well as wastewater treatment procedures are very dissimilar. In Hungary the active substance of the most often prescribed drugs are cardiovascular and antiulcer agents. Hence in our study compounds belonging to these two groups were seasonally monitored in two main streams encompassing the Buda side of the Hungarian capital city and flowing into the Danube. To obtain data on the occurrence, fate, and seasonal variation of the compounds, samples were taken from altogether eleven points located near wastewater treatment plants and confluences. The results gave no identifiable pattern in the seasonal variation of concentrations but the contribution of the tributaries and wastewater treatment plants could be followed as expected. From the runoff corrected estuary concentrations the annual contribution of these streams to pharmaceutical pollution of the Danube could be estimated to be in excess of 1 kilogram for atenolol, famotidine, metoprolol, ranitidine, and sotalol.

Seasonal odor impact range of selected wastewater treatment plants – modeling studies using Polish reference model

2018 ◽  
Vol 2017 (2) ◽  
pp. 422-429 ◽  
Author(s):  
Izabela Sówka ◽  
Yaroslav Bezyk ◽  
Agnieszka Grzelka ◽  
Urszula Miller ◽  
Łukasz Pachurka
Keyword(s):  
Mathematical Modeling ◽  
Wastewater Treatment ◽  
Seasonal Variation ◽  
Reference Model ◽  
Wastewater Treatment Plants ◽  
Summer Season ◽  
Emission Scenarios ◽  
Open Area ◽  
Odor Emission ◽  
Surrounding Areas

Abstract On-site odor measurements and mathematical modeling are useful for identifying the odor impact at the source and receptors located in areas adjacent to wastewater treatment plants (WWTPs). Impact of open area sources can be significant and may influence air quality both at the WWTP area and downwind in the surrounding areas. In this work, results of the odor measurements carried out in the spring and summer season for sources within three different mechanical-biological WWTPs in Poland are presented. The odor impact assessment was completed using a Polish reference model. The odor emission scenarios considering the contribution of major odor sources within WWTPs and the seasonal variation were determined. Obtained results showed significant differences between spring and summer seasons. The highest and the lowest measured odor concentrations at the WWTP property line were 75 ouE/m3 (July) and 6.4 ouE/m3 (March), respectively.

Occurrence, seasonal variation and removal efficiency of antibiotics and their metabolites in wastewater treatment plants, Jiulongjiang River Basin, South China

2015 ◽  
Vol 17 (1) ◽  
pp. 225-234 ◽  
Author(s):  
Han Zhang ◽  
Miaomiao Du ◽  
Hongyou Jiang ◽  
Dandan Zhang ◽  
Lifeng Lin ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Seasonal Variation ◽  
River Basin ◽  
Removal Efficiency ◽  
South China ◽  
Wastewater Treatment Plants ◽  
Jiulongjiang River

Wastewater treatment plants (WWTPs) are regarded as one of the most important sources of antibiotics in the environment.

Evaluating bioaccumulation of suspected endocrine disruptors into periphytons and benthos in the Tama River

2003 ◽  
Vol 47 (9) ◽  
pp. 71-76 ◽  
Author(s):  
A. Takahashi ◽  
T. Higashitani ◽  
Y. Yakou ◽  
M. Saitou ◽  
H. Tamamoto ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
River Water ◽  
Endocrine Disruptors ◽  
Wastewater Treatment Plants ◽  
Water Environment ◽  
The Other ◽  
Recombinant Yeast ◽  
Bioaccumulation Factors ◽  
17Β Estradiol ◽  
Aquatic Food

There are two major routes through which fish are exposed to endocrine disruptors (EDs); one route is through water that is a habitat; the other is through aquatic food such as algae and benthos. Few studies on the bioaccumulation of EDs in food have been conducted. Therefore, we evaluated the concentration in food of nonylphenol (NP), bisphenol A (BPA) and 17β-estradiol (E2), which were frequently detected in river water and in final discharge of Wastewater Treatment Plants (WWTPs) in Japan. We also evaluated the estrogenicity of samples using recombinant yeast. NP concentrations ranged 0.1-0.4 mg/L in the river water, while they ranged 8-130 mg/kg-wet in the periphytons and 8-140 μg/kg-wet in the benthos. BPA concentrations ranged 0.02-0.15 μg/L in the river water, while they ranged 2-8.8 μg/kg-wet in the periphytons and 0.3-12 μg/kg-wet in the benthos. E2 concentrations ranged 0.0001-0.0076 μg/L in the water, while they ranged 0.09-2.26 μg/kg-wet in the periphytons and <0.01-0.22 μg/kg-wet in the benthos. The estrogenicity ranged 0.0001-0.0464 μg-E2equivalent/L in the water, while it ranged 3.4-66.8 μg-E2equivalent/kg-wet in the periphytons and 7.4-5458 μg-E2equivalent/kg-wet in the benthos. Bioaccumulation factors of NP are estimated as 160-650 for the periphytons, and 63-990 for the benthos, respectively. Bioaccumulation factors of BPA are estimated as 18-650 for the periphytons, and 8-170 for the benthos, respectively. Bioaccumulation factors of E2 are estimated as 64-1,200 for the periphytons, and 100-160 for the benthos, respectively. The ratios of the periphytons and the benthos to the water in terms of the estrogenicity were larger than those in terms of the chemicals. In particularly, the ratio of the benthos to the water is about 106 in the maximum. The results suggest that food may be a more important route for fish exposed to EDs in water environment.

scholarly journals Experimental study on using commercial membranes for treatment of wastewater generated by collagen production

2019 ◽  
pp. 50-55
Author(s):  
Mirela Alina Constantin ◽  
Lucian Alexandru Constantin ◽  
Ion Viorel Patroescu ◽  
Gheorghe Batrinescu
Keyword(s):  
Wastewater Treatment ◽  
Wastewater Treatment Plants ◽  
The Other ◽  
Treated Wastewater ◽  
Biological Processes ◽  
Wastewater Discharge ◽  
Organic Loading ◽  
Membrane Processes ◽  
Collagen Production ◽  
Valuable Compounds

Collagen production is generating wastewater with high organic loading. This type of wastewater is still containing valuable compounds that can be reused in other applications. In order to investigate the possibility to recover and reuse these compounds the membrane based processes were investigated. Four types of commercial available membranes were characterised and then used to recover the proteins. The results proved that membrane based processes represent a viable alternative to treatment of wastewater generated by collagen production facilities when recovery of valuable compounds is envisaged. It has to be stressed that on the other hand only membrane processes do not assure too reach the quality norms imposed by the legislation for treated wastewater discharge into sewerage systems or natural receivers. Therefore, when proteins recovery and reuse is wanted, the membrane processes represent only the first step of wastewater treatment and should be followed by biological processes in order to obtain the organic loading quality indicators required for wastewater treatment plants discharges.

scholarly journals Metagenomes Reveal Global Distribution of Bacterial Steroid Catabolism in Natural, Engineered, and Host Environments

mBio ◽  
2018 ◽  
Vol 9 (1) ◽  
Author(s):  
Johannes Holert ◽  
Erick Cardenas ◽  
Lee H. Bergstrand ◽  
Elena Zaikova ◽  
Aria S. Hahn ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Marine Environment ◽  
Wastewater Treatment Plants ◽  
Marine Sponges ◽  
Model Organisms ◽  
Ecological Significance ◽  
Data Set ◽  
Degrading Bacteria ◽  
Globally Distributed ◽  
Biochemical Diversity

ABSTRACT Steroids are abundant growth substrates for bacteria in natural, engineered, and host-associated environments. This study analyzed the distribution of the aerobic 9,10-seco steroid degradation pathway in 346 publically available metagenomes from diverse environments. Our results show that steroid-degrading bacteria are globally distributed and prevalent in particular environments, such as wastewater treatment plants, soil, plant rhizospheres, and the marine environment, including marine sponges. Genomic signature-based sequence binning recovered 45 metagenome-assembled genomes containing a majority of 9,10-seco pathway genes. Only Actinobacteria and Proteobacteria were identified as steroid degraders, but we identified several alpha- and gammaproteobacterial lineages not previously known to degrade steroids. Actino- and proteobacterial steroid degraders coexisted in wastewater, while soil and rhizosphere samples contained mostly actinobacterial ones. Actinobacterial steroid degraders were found in deep ocean samples, while mostly alpha- and gammaproteobacterial ones were found in other marine samples, including sponges. Isolation of steroid-degrading bacteria from sponges confirmed their presence. Phylogenetic analysis of key steroid degradation proteins suggested their biochemical novelty in genomes from sponges and other environments. This study shows that the ecological significance as well as taxonomic and biochemical diversity of bacterial steroid degradation has so far been largely underestimated, especially in the marine environment. IMPORTANCE Microbial steroid degradation is a critical process for biomass decomposition in natural environments, for removal of important pollutants during wastewater treatment, and for pathogenesis of bacteria associated with tuberculosis and other bacteria. To date, microbial steroid degradation was mainly studied in a few model organisms, while the ecological significance of steroid degradation remained largely unexplored. This study provides the first analysis of aerobic steroid degradation in diverse natural, engineered, and host-associated environments via bioinformatic analysis of an extensive metagenome data set. We found that steroid-degrading bacteria are globally distributed and prevalent in wastewater treatment plants, soil, plant rhizospheres, and the marine environment, especially in marine sponges. We show that the ecological significance as well as the taxonomic and biochemical diversity of bacterial steroid degradation has been largely underestimated. This study greatly expands our ecological and evolutionary understanding of microbial steroid degradation.

Sign in / Sign up

Export Citation Format

Share Document