scholarly journals The influence of fish culture in floating net cages on microbial indicators of water quality

2013 ◽  
Vol 73 (3) ◽  
pp. 457-463 ◽  
Author(s):  
K. Gorlach-Lira ◽  
C. Pacheco ◽  
L.C.T. Carvalho ◽  
H.N. Melo Júnior ◽  
M.C. Crispim
Keyword(s):  
Water Quality ◽  
Fish Culture ◽  
E Coli ◽  
Physico Chemical ◽  
Fecal Streptococci ◽  
Microbiological Parameters ◽  
Thermotolerant Coliforms ◽  
Net Cages ◽  
Culture Site

This work was carried out to analyse the microbiological parameters of the water quality of a reservoir used for the irrigation and culture of tilapia (Oreochromis niloticus) in floating net cages. The physico-chemical parameters, counts of mesophilic total aerobic bacteria, total and thermotolerant coliforms and fecal streptococci, and the presence of Escherichia coli in samples of water collected in three sites of the reservoir (pre-culture site, culture site, post-culture site) were analysed. The levels of ammonia (0.047-0.059 mg/L), nitrite (0.001-0.021 mg/L) and total phosphorus (0.050-0.355 mg/L) in the water did not show significant differences (p > 0.05) between sampling sites. The levels of total bacteria in the water varied between 1.3 x 104 and 67.3 x 104 CFU/100 mL. The MPN values of thermotolerant coliforms (< 930 MPN/100 mL) were within values recommended for water used for fish culture and/or irrigation. The presence of E. coli and fecal streptococci were verified in 48% and 56% of analysed samples, respectively. The site with floating net cages showed more samples contaminated with E. coli and fecal streptococci than other sampling points.

STUDI PERBANDINGAN KUALITAS AIR BERSIH DALAM KAITANYA DENGAN AKTIVITAS MASYARAKAT DI SEKITAR SUMBER AIR PADA DESA WAINITU, BATUMERAH, AMAHUSU, DAN HALONG

2017 ◽  
Vol 13 (2) ◽  
pp. 111-119
Author(s):  
Lela Uyara ◽  
Pieter Kunu ◽  
Silwanus M Talakua
Keyword(s):  
Water Quality ◽  
Quality Standard ◽  
Total Coliform ◽  
Quality Analysis ◽  
Clean Water ◽  
Water Quality Analysis ◽  
E Coli ◽  
Microbiological Parameters ◽  
Standard Quality

The study aims to determine the quality of clean water in the villages of Wainitu, Batumerah, Amahusu and Halong by comparing the result of water quality analysis with water quality standard. Water quality analysis includes Physiscal, Chemical, and Microbiological parameters. This research uses descriptive method, this method describes systematics, accurate about facts and characteristic of the quality of clean water of each research location. The results showed that the source of clean water in the village of Batumerah did not meet the standard of clean water quality standards indicated by the number of E. coli and the high total coliform.  Keywords: standard quality of clean water, water quality, Wainitu, Batumerah, Amahusu and Halong villages   ABSTRAK Penelitian yang bertujuan untuk menetapkan kualitas air bersih di Desa Wainitu, Batumerah, Amahusu dan Halong, dengan membandingkan hasil analisis kualitas air dengan standar baku mutu air bersih. Analisis kualitas air meliputi parameter fisika, kimia dan mikrobiologi. Penelitian ini menggunakan metode deskriptif; metode ini menggambarkan sicara sistematis, akurat, fakta dan karakteristik mengenai kualitas air bersih di masing-masing lokasi penelitian. Hasil penelitian menunjukkan bahwa sumber air bersih di Desa Batumerah tidak memenuhi standar baku mutu air bersih yang ditunjukkan oleh jumlah E. coli dan total Koliform yang tinggi. Kata Kunci: baku mutu air bersih, Desa Wainitu, Batumerah, Amahusu dan Halong, kualitas air

scholarly journals Physicochemical quality of and Escherichia coli resistance profiles in urban surface waters

2020 ◽  
Vol 80 (3) ◽  
pp. 661-668
Author(s):  
I. Malagi ◽  
S. C. Sampaio ◽  
F. G. S. Pinto ◽  
D. M. Rosa ◽  
R. R. dos Reis
Keyword(s):  
Escherichia Coli ◽  
Public Health Problem ◽  
Resistant Bacteria ◽  
Urban Centers ◽  
E Coli ◽  
Quality Of Water ◽  
Microbiological Parameters ◽  
National Environment ◽  
Thermotolerant Coliforms

Abstract Aquatic ecosystems of urban rivers are contaminated through waste disposal, which poses a public health problem. The objective of this research was to evaluate the quality of water used for recreation and public supply of six rivers in the city of Cascavel - Paraná, including Cascavel, Quati, Bezerra, Antas, Clarito and Amambay. Samples were collected every 4 months in 2017, and their physicochemical and microbiological parameters, as well as resistance profiles of strains of Escherichia coli to antimicrobials distributed by pharmacies of the primary healthcare network, were evaluated. Parameters such as water temperature, turbidity, total nitrogen, total phosphorus, total coliforms and thermotolerant coliforms showed significant differences. The allowed limit for thermotolerant coliforms, which was set by National Environment Council, Resolution 357/2005, was exceeded in all of the six analyzed rivers. It was determined that 48.1% of E. coli strains showed resistance to nine antimicrobial tested. The highest levels of resistance were found for ampicillin (27.7%), tetracycline (27.7%) and amoxicillin (24.0%). The results of this study contribute to the understanding of the hazards associated with the contamination of springs in urban centers with wastewater containing resistant bacteria. Therefore, recovery work is necessary in these areas because of the importance of these water sources for the entire western region of Paraná state.

scholarly journals Assessing the water quality of Suva foreshore for the establishment of estuary and marine recreational water guidelines in the Fiji Islands

2021 ◽  
Author(s):  
Praneel Pranesh Lal ◽  
Natacha Juste-Poinapen M.S.N. ◽  
Johann Poinapen
Keyword(s):  
Water Quality ◽  
Recreational Water ◽  
Recreational Waters ◽  
E Coli ◽  
Fiji Islands ◽  
Physico Chemical ◽  
Sampling Programme ◽  
Water And Wastewater ◽  
River Site

Abstract The Standards for water quality in Fiji defined in the Environment Management Regulations (2007) only relate to effluent discharge into the environment. Urbanisation is contributing to wastewater contamination in receiving estuary and marine recreational waters, thus requiring specific guidelines. To create a baseline for this, a sampling programme with relevant physico-chemical and biological parameters was implemented at 3 sites along the Suva foreshore, for 8 consecutive months, during low and high tides. Analysis was done in triplicates, using standard methods approved for the examination of water and wastewater. In the absence of relevant Fiji guidelines, the results were compared with ANZECC (2000) guidelines for estuary and marine waters. Low DO levels, high COD, TN, NH3, TP, OP and heavy metal concentrations were measured in all 3 sites. For instance, TN and NH3 concentrations as high as 4.44 ±0.99 mg/L and 2.58 ± 0.89 mg/L respectively were recorded in Wailea river (Site 2). The colony counts for the TC, FC and E. coli were in most cases above the limits. These results confirm that wastewater discharges add to the inherent levels of parameters in receiving water bodies and support the need for a specific, robust Fiji standards to better monitor water quality in foreshore areas.

scholarly journals Water quality of the Atibaia river in the city of Paulínia/SP: evaluation of the Electrical Conductivity and Chloride variables

2021 ◽  
Vol 43 ◽  
pp. e66
Author(s):  
Camila Pereira Montovani ◽  
Cassiana Maria Reganhan Coneglian ◽  
Elaine Cristina Catapani Poletti
Keyword(s):  
Water Quality ◽  
Electrical Conductivity ◽  
Pearson Correlation ◽  
Oxygen Demand ◽  
Principal Component ◽  
E Coli ◽  
Thermotolerant Coliforms ◽  
Linear Correlation Analysis ◽  
The City

The present study aimed to evaluate the characteristics that most influenced the water quality variability of the Atibaia river in the city of Paulínia/SP, the coordinates of the water collection point are given by 22º44'23”(S) and 47º07 ' 40 ”(W), in the dry and rainy seasons, from 2006 to 2016. The data used in this study come from the monitoring of parameters carried out in the spring by a research team, accompanied by periodic collections of surface water samples and analyzes laboratory tests. The parameters addressed included: precipitation, temperature, Hydrogenionic potential (pH), turbidity, thermotolerant coliforms (Escherichia coli (E. coli)), dissolved oxygen (DO), biochemical oxygen demand (BOD), chemical oxygen demand (COD), total nitrogen (Ntotal), total phosphorus (Ptotal), total dissolved solids (TDS), electrical conductivity (EC) and chlorides (Cl-). Water quality was assessed using linear correlation analysis, using the Pearson Correlation coefficient (r), and Multivariate Analysis, using Principal Component Analysis (PCA). The presence of EC, Cl- and COD in both periods indicates quality characteristics related to the mineralization of organic compounds present in the water and the eutrophication process.

scholarly journals Analisis parameter fisika kimia air pada lokasi karamba jaring tancap di Danau Tondano Kabupaten Minahasa Provinsi Sulawesi Utara

2019 ◽  
Vol 7 (1) ◽  
Author(s):  
Abdul J. Sarif ◽  
Diane J. Kusen ◽  
Novie P.L. Pangemanan
Keyword(s):  
Water Quality ◽  
Quality Standard ◽  
Quality Parameters ◽  
Chemical Parameter ◽  
North Sulawesi ◽  
Net Cages ◽  
Physical And Chemical ◽  
Culture Site

This research was to determine the current condition of the water physical chemical quality parameters at culture areas in Lake Tondano. The study  conducted at Lake Tondano Minahasa Regency, North Sulawesi Province.  Determination of the water physical and chemical qualitis was carried through field observation and laboratorium analysis at the Industrial Research and Standardization in Manado. Measurement and retrieval of physical and chemical parameter of water quality was done at culture site with high density, medium and small especially at Eris Village, Leleko Village and Toulour Village. Water temperature was 26oC - 29oC, brightness of 1.34-2.8 cm, depth of 4.23-11.8 m, acidity of 6.7-7.8 mg/L, dissolved oxygen, 2.75–6.31 mg/L, nitrate 0.00-1.58 mg/L, nitrite 0.00–0.027 mg /L, ammonia 0.00–0.292 mg/L and phosphate 0.02–0.721 mg/L.  The results showed that water quality of Lake Tondano still match the quality standard of water quality for fish cultivation except ammonia.Keywords: water quality, net cages, Lake Tondano

scholarly journals Microbiological water quality monitoring of four ponds from Lagoa do Sino Farm located in São Paulo State, Brazil

2021 ◽  
Vol 43 ◽  
pp. e52901
Author(s):  
Patrícia Alexandre Evangelista ◽  
Mayara Andrade Martins de Souza ◽  
Iuri Emanuel de Paula Ferreira ◽  
Natan de Jesus Pimentel-Filho
Keyword(s):  
Water Quality ◽  
Riparian Vegetation ◽  
Microbiological Quality ◽  
Water Quality Monitoring ◽  
Agricultural Activities ◽  
E Coli ◽  
Genotypic Characterization ◽  
Thermotolerant Coliforms ◽  
Microbiological Water Quality

This study aimed to evaluate the microbiological quality of the water of four ponds used for irrigation on the Lagoa do Sino Farm, as well as to perform the genotypic characterization of virulence factors in Escherichia coli isolates. Sampling was conducted for 11 months, between 2015 and 2016. Samples were analyzed for the presence of thermotolerant coliforms, E. coli and heterotrophs. DNA was extracted from E. coli isolates, followed by genotypic characterization by polymerase chain reaction. Agricultural activities and pesticides used in the sampling period were documented in order to assess possible relationships between agricultural activities and microbiological water quality. The absence of suitable riparian vegetation around all the ponds was observed, benefiting the entry of organic matter and contaminants in the water body. A high index of thermotolerant coliforms in some months indicated the possibility of the transmission of pathogenic microorganisms in these ponds. The values found in some months were above the regulatory limits for water potability and water intended for irrigation. The agrochemicals used in the period seem to influence the results obtained. All 17 E. coli isolates showed at least one of the virulence genes estA, stx1, stx2, and aatA, indicating enterotoxigenic, enterohaemorrhagic or enteroaggregative nature. The presence of E. coli in the waters may be associated with the presence of animals. The water samples analyzed are not suitable for irrigation of vegetables that are consumed raw and/or low lying fruits ingested without skin removal. It is essential to broaden the control of the use of chemicals, as well as the preservation of riparian vegetation to improve the quality of water used in the farm's agricultural activities.

scholarly journals Determination of the Microbial and Chemical Loads in Rivers from the Quito Capital Province of Ecuador (Pichincha)—A Preliminary Analysis of Microbial and Chemical Quality of the Main Rivers

2020 ◽  
Vol 17 (14) ◽  
pp. 5048
Author(s):  
Pamela Borja-Serrano ◽  
Valeria Ochoa-Herrera ◽  
Laurence Maurice ◽  
Gabriela Morales ◽  
Cristian Quilumbaqui ◽  
...  
Keyword(s):  
Growth Media ◽  
Chemical Parameters ◽  
National Guidelines ◽  
E Coli ◽  
Counting Procedure ◽  
Physico Chemical ◽  
Microbiological Parameters ◽  
Microbial Agents

Contamination of natural water sources is one of the main health problems worldwide, which could be caused by chemicals, metals, or microbial agents. This study aimed to analyze the quality of 18 rivers located in Quito, the capital province of Pichincha, Ecuador, through physico-chemical and microbial parameters. The E. coli and total coliforms assessments were performed by a counting procedure in growth media. Polymerase chain reaction (PCR) was realized to detect several microbial genera, as well as Candida albicans, two parasites (Cryptosporidium and Giardia spp.) and E. coli pathotypes: enterohemorrhagic E. coli (EHEC), enteroaggregative E. coli (EAEC), enteroinvasive E. coli (EIEC) and enteropathogenic E. coli (EPEC). Additionally, physico-chemical parameters and major and trace metals were analyzed in each surface water sample. Our results demonstrated that most of the rivers analyzed do not comply with the microbial, physico-chemical, and metal requirements established by the Ecuadorian legislation. In terms of microbial pollution, the most polluted rivers were Monjas, Machángara, Pisque, and Pita Rivers. Furthermore, three out of four analyzed E. coli pathotypes (EIEC, EHEC, and EAEC) were detected in certain rivers, specifically: Monjas River showed the presence of EIEC and EHEC; in the Machángara River, EAEC and EIEC were detected; and finally, EIEC was present in the Guayllabamba River. Several physico-chemical parameters, such as pH, CODtotal, and TSS values, were higher than the Ecuadorian guidelines in 11, 28, and 28% of the rivers, respectively. Regarding heavy metals, Zn, Cu, Ni, Pb, Cd, and Mn surpassed the established values in 94, 89, 61, 22, 22, and 17% of the rivers, respectively. Machangara River was the only one that registered higher Cr concentrations than the national guidelines. The values of Al and Fe were above the recommended values in 83 and 72% of the rivers. Overall, based on the physical-chemical and microbiological parameters the most contaminated rivers were Machángara and Monjas. This study revealed severe contaminations in Ecuadorean Rivers; further studies should evaluate the sources of contamination and their impact on public health.

scholarly journals Water quality assessment of the Demetrio stream: an affluent of the Gravataí River in the South of Brazil

2022 ◽  
Vol 82 ◽  
Author(s):  
L. P. Martins ◽  
J. Sampaio ◽  
R. S. Godoi ◽  
L. K. Vargas ◽  
F. R. Silva ◽  
...  
Keyword(s):  
Water Quality ◽  
Environmental Quality ◽  
Water Quality Assessment ◽  
Metropolitan Region ◽  
Porto Alegre ◽  
Physico Chemical ◽  
Microbiological Parameters ◽  
South Of Brazil ◽  
Iron And Manganese

Abstract The Gravataí River basin, one of the main water sources of the metropolitan region of Porto Alegre, is among the ten most polluted rivers in Brazil. Water quality is monitored only through physico-chemical and microbiological parameters in Brazil, and in this context, considering the importance of the use of biomarkers in complementing the analysis of water, the present study aimed to evaluate the environmental quality of the main affluent of the Gravataí River, Demetrio stream, through physico-chemical, microbiological, and cytogenotoxic criteria, at the stream source (P1), whereas samples P2 and P3 were obtained from the upstream near the area with the highest urban density and the downstream near the meeting point with the Gravataí River, respectively. The results for copper concentration and color classified the Demetrio stream as Class 4 in general, that is, the water is suitable only for navigation and to landscape harmony. The main genotoxic alterations (micronuclei and nuclear buds) were observed in P2, in which were obtained the highest levels of copper, in addition to iron and manganese. Anthropic interventions were observed in P1 and P2; however, due to its low metal concentration, P3, near the Gravataí River, manifested an improvement in environmental quality.

Importance of maintenance in rainwater harvesting systems: a case study

2015 ◽  
Vol 16 (1) ◽  
pp. 97-103 ◽  
Author(s):  
Ju Young Lee ◽  
Hyoungju Kim ◽  
Mooyoung Han
Keyword(s):  
Water Quality ◽  
Rainwater Harvesting ◽  
Oxygen Demand ◽  
Total Coliform ◽  
E Coli ◽  
Harvesting Systems ◽  
Microbiological Parameters ◽  
Proper Operation

In this study, the quality of collected rainwater at a downtown middle school rainwater harvesting system was evaluated by measuring physical, chemical, and microbiological parameters such as pH, dissolved oxygen (DO), chemical oxygen demand (COD), total nitrogen (TN), total phosphorus (TP), NO3, PO4, total coliform (TC), Escherichia coli , and some metals (i.e. Al, Cr, Mn, Zn, Cu, As, Cd, and Pb) (2003 to 2011). The analysis shows that the collected water quality is poor, which presents health, considering the high levels of bacterial indicators detected in the harvested rainwater, i.e. turbidity (1.4 to 15.5 NTU) and E. coli (120 and 35 CFU/100 mL in 2007 to 210 and 60 CFU/100 mL in 2011). This study shows that deteriorating water quality was caused by system contamination due to the absence of maintenance. Based on this study, proper operation and maintenance are generally the simplest and most effective ways of maintaining water quality.

scholarly journals ANALYSIS OF THE ENVIRONMENTAL IMPACTS CAUSED TO THE WATER OF MIRITI LAKE IN THE MUNICIPALITY OF MANACAPURU-AM

2019 ◽  
Vol 7 (9) ◽  
pp. 11-21
Author(s):  
ALEXANDRA AMARO DE LIMA ◽  
Jeissy Adiene Queiroz Santana ◽  
Igor Felipe Oliveira Bezerra ◽  
Jorge De Almeida Brito Júnior
Keyword(s):  
Water Quality ◽  
Quality Standards ◽  
Gram Negative Bacteria ◽  
Urban Centers ◽  
Gram Negative ◽  
Legal Norms ◽  
Intervention Measures ◽  
Physico Chemical ◽  
Microbiological Parameters ◽  
Thermotolerant Coliforms

Despite the great supply of water resources, the Amazon Hydrographic Region shows signs of environmental degradation when it comes to water quality, especially in areas located near major urban centers. The purpose of this work was to go to the field to collect water samples from the Miriti-AM lake, to evaluate the physico-chemical and microbiological parameters of the same, being selected for evaluation: pH, turbidity, temperature, BOD5, OD and thermotolerant coliforms. The parameters of Water Quality (QA) analyzed were compared with the limits established by CONAMA Resolution 357/2005. At all points the presence of thermotolerant coliforms was not found but, it was found the presence of gram-negative bacteria which indicates total coliforms. With the project carried out in Lake Miriti-AM, it was verified that the water condition of this spring is not fully within the quality standards established by the legal norms for use of class I waters, requiring intervention measures for the protection of this source for control and adaptation of standards that are in disagreement with legal norms.

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