scholarly journals Wastewater Collection and Transportation through Drainage Network- a Potential Threat to Biodiversity & Local Eco-system in Zanzibar Stone-town & Surroundings

2018 ◽  
pp. 1-13
Author(s):  
Z. M. Abubakar ◽  
A. R. Rabia ◽  
A. M. Ussi ◽  
M. A. Bakar ◽  
R. A. Ali
Keyword(s):  
Waste Water ◽  
Urban Areas ◽  
Pathogenic Bacteria ◽  
Bacterial Species ◽  
Bacterial Load ◽  
Waste Water Treatment ◽  
Potential Threat ◽  
Cross Sectional ◽  
Health Crisis ◽  
High Turbidity

Waste water effluents voided in the coastal areas of Zanzibar are highly polluted posing a public health crisis. This cross-sectional study, carried out in September 2017, investigated bacterial load and physicochemical characteristics of the effluents discharged into coastal marine waters of the Zanzibar stone town and peri-urban areas. Ten drains, seven of which were impervious and three pervious, were sampled twice per day in mornings and afternoons. Each drain was sampled at three sites; the out-pour site close to the sea and two sites upstream 100 meters apart. Physicochemical parameters including Dissolved Oxygen (DO), pH and turbidity were determined immediately after arrival in the laboratory. Colony forming units/ ml were also determined.  Bacterial counts were higher in impervious drains, in out-pour sites and in the afternoons. Conversely counts were lower in the out-pour sites compared to upstream sites in the pervious drains. DO was significantly higher in the pervious compared to impervious drains (p = 0.004). Turbidity was high in the mornings, but one drain had significantly high turbidity (p=0.0009). In all drains pH was high in the afternoon than mornings. Thirteen bacterial species, mostly gram-negative Enterobacteriaceae were isolated. Vibrio cholerae was isolated from 5 drains. Ground water close to pervious drains had coliforms beyond WHO guidelines. Waste water drains in Zanzibar urban and peri-urban areas are vastly contaminated with organic matter and pathogenic bacteria leading to high turbidity and oxygen depletion. It is recommended to increase awareness to the public and introduce waste water treatment strategies both physically and chemically.

scholarly journals Investigation of Bacteriological Quality of Meat from Abattoir and Butcher Shops in Bishoftu, Central Ethiopia

2019 ◽  
Vol 2019 ◽  
pp. 1-8 ◽  
Author(s):  
Abebe Bersisa ◽  
Dereje Tulu ◽  
Chaluma Negera
Keyword(s):  
Questionnaire Survey ◽  
Pathogenic Bacteria ◽  
Bacterial Species ◽  
Bacterial Load ◽  
Simple Random Sampling ◽  
Plate Count ◽  
Cross Sectional ◽  
E Coli ◽  
Cutting Knife ◽  
Butcher Shops

The study was conducted from November 2015 to November 2016 to determine bacterial load and identify pathogenic bacteria (S. aureus,E. coli, andSalmonellaespecies) in meat from abattoir and butcher shops as well as to assess associated hygienic and sanitation practices being experienced in the selected study site. A cross-sectional study was conducted where a simple random sampling method was used to select butcher shops, and the municipal abattoir was purposively selected. A structured questionnaire survey was also used to assess hygienic status of the municipal abattoir and butcher shops. A total of 124 samples (48 swab samples from abattoir carcass, 4 samples of carcass washing water about 20 ml of each, and 36 swab samples each from butcher shop cutting table and cutting knife, respectively) were collected during the study period. The collected samples were processed for aerobic plate count, and the total mean count was found to be 4.53 log10 cfu/cm2from abattoir carcass swab samples, 2.4 log10 cfu/ml from water samples, 6.58 log10 cfu/cm2from butcher shops cutting table, and 6.1 log10 cfu/cm2from cutting knife swab samples.E. coliwas the dominant bacterial species isolated (35.2%), followed byS. aureus(22.5%) andSalmonellaespecies (9.9%). According to the questionnaire survey, 48.4% (15/31) of the abattoir workers did not receive any training regarding food safety issues. Moreover, a majority (66.67%) of the respondents of the butcher house workers were grade 1–4 (elementary) in their educational level and do not use hairnet and handle money with bare hands during serving meat to consumers. The study showed that the hygienic status of the abattoir and butcher shops in the study area is poor, and the obtained results of bacterial load are higher than the acceptable limit of the standard. Therefore, the necessary strategies towards hygiene and sanitation of meat in the town should be implemented.

Microbiological quality of residues from drinking water preparation

1995 ◽  
Vol 31 (5-6) ◽  
pp. 75-79 ◽  
Author(s):  
M. Würzer ◽  
A. Wiedenmann ◽  
K. Botzenhart
Keyword(s):  
Waste Water ◽  
Escherichia Coli ◽  
Pseudomonas Aeruginosa ◽  
Drinking Water ◽  
Water Treatment ◽  
Pathogenic Bacteria ◽  
Waste Water Treatment ◽  
Microbiological Quality ◽  
Detection Limits

In Germany the application of procedures such as flocculation and filtration in the preparation of drinking water results in the annual production of an estimated 500,000 t of sediments and sludges. Some of these residues have a potential for being reused, for example in agriculture, forestry, brickworks or waste water treatment. To assess the microbiological quality of residues from waterworks methods for the detection of enterobacteria, Escherichia coli, Salmonella, Pseudomonas aeruginosa, Legionella, poliovirus, Ascaris suis eggs and Cryptosporidium have been evaluated regarding their detection limits and were applied to various residues from German waterworks. Results show that sediments and sludges may contain pathogenic bacteria, viruses and protista. When residues from waterworks are intended to be reused in agriculture or forestry the microbiological quality should therefore be considered.

Integrated waste water management for a small river basin - a case study

1998 ◽  
Vol 38 (11) ◽  
pp. 87-95
Author(s):  
R. Fenz ◽  
M. Zessner ◽  
N. Kreuzinger ◽  
H. Kroiss
Keyword(s):  
Waste Water ◽  
Water Management ◽  
River Basin ◽  
Rural Areas ◽  
Urban Areas ◽  
Waste Water Treatment ◽  
Point Of View ◽  
Political Issue ◽  
The North ◽  
Waste Water Management

In Austria approximately 70% of the population is connected to sewerage and to biological waste water treatment plants. Whereas the urban areas are already provided with these facilities to a very high extent, effort is still needed in rural areas to meet the requirements of the Austrian legislation. The way, this task should be solved has provoked much controversy. It is mainly the question, whether centralised or decentralised sewage disposal systems are preferable from the ecological and economical point of view, that became a political issue during the last 5 years. The Institute for Water Quality and Waste Management was asked to elaborate a waste water management concept for the Lainsitz River Basin, a mainly rural area in the north of Austria discharging to the Elbe river. Both ecological and economical aspects should be considered. This paper presents the methodology that was applied and the criteria which were decisive for the selection of the final solution.

Bacterial Contamination of Hospital Physicians' Stethoscopes

1999 ◽  
Vol 20 (9) ◽  
pp. 626-628 ◽  
Author(s):  
Louis Bernard ◽  
Anne Kereveur ◽  
Dominique Durand ◽  
Jeanne Gonot ◽  
Fred Goldstein ◽  
...  
Keyword(s):  
General Hospital ◽  
Nosocomial Infections ◽  
Pathogenic Bacteria ◽  
Bacterial Contamination ◽  
Bacterial Species ◽  
Bacterial Load ◽  
Clinical Use ◽  
Bacterial Survival ◽  
Liquid Soap ◽  
Kinetics Of

AbstractBecause stethoscopes might be potential vectors of nosocomial infections, this study, conducted in a 450-bed general hospital, was devised to evaluate the bacterial contamination of stethoscopes; bacterial survival on stethoscope membranes; the kinetics of the bacterial load on stethoscope membranes during clinical use; and the efficacy of 70% alcohol or liquid soap for membrane disinfection. Among the 355 stethoscopes tested, 234 carried ≥2 different bacterial species; 31 carried potentially pathogenic bacteria. Although some bacteria deposited onto membranes could survive 6 to 18 hours, none survived after disinfection.

scholarly journals Comparative Assessment 0f Water Quality in the Bagmati River Basin, Nepal

ZOO-Journal ◽  
2021 ◽  
Vol 5 ◽  
pp. 68-78
Author(s):  
Chadka B Pal ◽  
Ramesh R Pant ◽  
Bhagawat Rimal ◽  
Akkal D Mishra
Keyword(s):  
Waste Water ◽  
Water Quality ◽  
Urban Areas ◽  
Anthropogenic Activities ◽  
Action Plan ◽  
Urban Expansion ◽  
Waste Water Treatment ◽  
Capital City ◽  
Monsoon Period ◽  
Bagmati River

Kathmandu, the capital city of Nepal is one of the most populated destinations of the country. The water pollution remains a challenging issue for the sustainable development in the valley despite several pollution control devices, awareness-raising and policy measures. During monsoon period 2018, surface water samples were collected from 10 sites of the Bagmati River and its tributaries within the valley to evaluate the water quality. The different physico-chemical parameters were determined to assess pollution along a 26.5 km stretch between Sundarijal Dam to Balkhu Bridge of the Bagmati River and its selected tributaries. The Electrical Conductivity (EC) ranged from 33-816μS/cm while turbidity ranged from 0.3- 981 NTU and Total Dissolved Solids (TDS) ranged from 16 to 612 mg/l. The ionic concentrations were higher in the lower sections where the population density is high compared to the head waters. The high value of TDS and low value of Dissolved Oxygen (DO) in the lower belts of rivers were due to large inputs of waste water, uncoordinated rapid urban expansion, inadequate waste water treatment facilities and organic loads caused by anthropogenic activities. A comparative study for the water quality variables in the urban areas showed that the main river and its tributaries were equally polluted. From water analysis, downstream sites showed contamination and comparatively polluted among the tributaries and Bagmati River. There is a need to take action plan against polluted site for sustainability of aquatic health of the riverine environment and to address the river for its longer life both by public and government sectors.

scholarly journals Modelling Snowmelt Induced Waste Water Inflows

1998 ◽  
Vol 29 (4-5) ◽  
pp. 285-302 ◽  
Author(s):  
Annette Semádeni-Davies
Keyword(s):  
Waste Water ◽  
Rural Areas ◽  
Urban Areas ◽  
Overland Flow ◽  
Waste Water Treatment ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Waste Water Treatment Plant ◽  
Runoff Generation ◽  
Rural And Urban Areas

Impacts of urbanisation on hydrological processes are different for snowmelt and rainfall events. Furthermore, snowmelt and runoff generation differ between rural and urban areas. Within an urban area, melt intensities are increased at some sites; hence, the volume of water early in thaw can be greater than in rural areas. However, shading can reduce melt in other areas so that the melt period is extended. Many surfaces are at least seasonally impervious and generate overland flow - there is an apparent increase in the area contributing to quickflow as normally permeable surfaces become saturated or frozen or both. Water infiltrating permeable soil causes saturation and groundwater recharge so that water can seep into sewers. Regardless of whether water enters via inlets or sewer infiltration, drainage networks ensure swift delivery of melt water to outlets. Snowmelt induced runoff reaching the Uddebo Waste Water Treatment Plant in Luleå, Sweden, is investigated and a model of urban snowmelt and meltwater routing is proposed. The role of surface type (permeable and impervious) and snow cover characteristics (snow-free, undisturbed, compacted and piled) upon model output is studied. Results are encouraging and provide a good platform for further research.

scholarly journals Impact of haze events on airborne bacterial consortia–a case study

2021 ◽  
Vol 3 (1) ◽  
Author(s):  
S. M. N. K. Thilakarathne ◽  
A. Ekanayake ◽  
P. S. Madamarandawala ◽  
W. B. C. P. Weerarathne ◽  
C. A. Thotawatthage ◽  
...  
Keyword(s):  
Sri Lanka ◽  
Pathogenic Bacteria ◽  
Negative Impact ◽  
Anthropogenic Activities ◽  
Bacterial Species ◽  
Bacterial Load ◽  
Common Species ◽  
Burkholderia Multivorans ◽  
Bacterial Consortia ◽  
Haze Event

AbstractTransboundary haze events received a noticeable attention recently, due to their frequent occurrences. They are mainly, consequences of anthropogenic activities. Sri Lanka experienced a haze event parallel to India in November 2019, the first air pollution event in Sri Lanka linked to a haze event in India. Due to the limited availability of information on haze-related microorganisms, we conducted this study in Kandy, Sri Lanka, aiming to explore the airborne bacterial consortia during a haze event. The natural sedimentation method was used for air sampling. Bacterial identification and the total bacterial load were determined using Sanger sequencing and qPCR. Notably, the total bacterial load was elevated by ~ 40% with the haze and decreased with decreasing haze intensity. The highest bacterial load was reported during the day time of the most intense hazy day (1.89 × 106 cells/µl) compared to non-hazy days (lowest; 1.12 × 105 cells/µl). Twelve bacterial species were identified and the most abundant phylum was Proteobacteria. The most common species observed during haze was Acinetobacter modestus. The percentage of culturable bacterial species was also high during the haze event (75% during day time of the most intense hazy day compared to 25% on the control). Two human pathogenic bacteria Burkholderia multivorans and Chryseobacterium gleum were found only during the haze event. Therefore, haze events could be hazardous to humans by means of the presence and fluctuating amounts of pathogenic bacteria. Thus, these findings are important in developing policies and guidelines to monitor and minimize the negative impact of haze events.

scholarly journals Study on Air Bacteria at Different Altitudinal Locations in Tezpur to Tawang Axis

2020 ◽  
Vol 5 (2) ◽  
pp. 93-102
Author(s):  
Soumya Chatterjee ◽  
Sibnarayan Datta ◽  
Leeza Banu ◽  
Mohan G. Vairale ◽  
Sonika Sharma
Keyword(s):  
16S Rrna ◽  
Human Health ◽  
Pathogenic Bacteria ◽  
Bacterial Species ◽  
Bacterial Load ◽  
Well Being ◽  
Molecular Techniques ◽  
Rrna Gene ◽  
Public Health Perspective ◽  
Pathogenic Potential

Microflora plays an important role in modulating environmental quality. Among microflora, bacteria are omnipresent in the environment. Pathogenic bacteria, present in air, are known to affect significantly the health and well-being of human, animal or plant populations. Air bacteria monitoring is thus essential for surveillance of pathogenic microorganisms from public health perspective besides its significant implications in detection and mitigation of biothreat related issues. Despite the geo-politically strategic importance of northeast India, there is scarcity of data on human health and disease surveillance. Considering these facts, we, for the first time studied the bacterial diversity of air at six important sites adjacent to the international border in the northeast region of India, having an altitude range of 73 m (Tezpur) to 4170 m (Sela Pass) above sea level. Standard microbiological techniques, such as Tryptone Soya Agar, Mannitol salt and McConkey agar strips and plates were used for air bacterial load assessment and culture for subsequent analysis using biochemical and molecular techniques. Following RFLP study, twenty six different bacterial colonies were isolated. Subsequently, bacteria identification was carried out by examining the substrate utilisation patterns, sequencing 16S rRNA gene and phylogenetic analysis. Results of the study reveal that the isolates mostly belong to two genera Bacillus and Staphylococcus (eleven in each genus), along with Micrococcus, Pseduomonas and Acinetobacter. Based on significant match of our sequences with that of medically important bacterial 16S rRNA sequences available at 16SpathDB 2.0 and review of available literature, we found that a number of these bacterial species have the pathogenic potential. In this manuscript we report our results and discuss the importance of air bacterial surveillance from the perspective of human health, hygiene and biothreat mitigation.

scholarly journals Biodegradation potential of bacterial isolates from dye wastewater at Marina, Sokoto metropolis

2020 ◽  
Vol 36 (2) ◽  
pp. 87-94
Author(s):  
M.A. Adegbite ◽  
K. Ibrahim ◽  
S.A. Yusif
Keyword(s):  
Waste Water ◽  
Bacillus Subtilis ◽  
Bacillus Cereus ◽  
Bacterial Species ◽  
Waste Water Treatment ◽  
Dye Wastewater ◽  
Bacterial Isolates ◽  
Bacterial Strains ◽  
Promising Tool ◽  
Degradation Ability

This study was carried out to determine the biodegradation potential of bacterial isolates from dye wastewater at Marina Area, Sokoto. Three (3) of the bacteria were identified; Bacillus subtilis, Luteimonasaestuarrii and Bacillus cereus and were used for further studies based on their degradation ability of green, red, yellow and blue dyes. Bacillus subtilis, Luteimonas aestuarii and Bacillus cereus have the potential to degrade all the four dyes used during the present investigation. However, efficacy of the various bacterial strains was found to vary at different concentration levels in degradation of a particular dye. Thus, by this study it can be concluded that Bacillus cereus, Bacillus subtilis and Luteimonas aestuarii can be used as a good microbial source for dye waste water treatment. The selected bacterial species represent a promising tool for application in biodegradation of dye waste water and the potential observed would allow for the application of the bacterial isolates for treatment of dye effluents before disposal. Keywords: effluents, isolates, biodegradation, dye and bacterial.

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