scholarly journals Impacts of sedimentation on rainwater quality: case study at Ikorodu of Lagos, Nigeria

2021 ◽  
Author(s):  
Chukwuemeka Kingsley John ◽  
Jaan H. Pu ◽  
Manish Pandey ◽  
Rodrigo Moruzzi
Keyword(s):  
Suspended Solids ◽  
Storage System ◽  
Total Suspended Solids ◽  
Phase Zone ◽  
E Coli ◽  
Different Depths ◽  
Rain Events ◽  
The Impact ◽  
Better Than

Abstract This study investigated the impact of sedimentation on rainwater storage system using a case study at the Ikorodu area of Lagos state, a rural area in Nigeria. In this investigation, the proportions of Escherichia coli (E. coli) that were settleable (due to sedimentation) and those that were at the free phase have been studied. Water samples were collected from different depths in the inspected rainwater storage tank at two different periods (i.e. rainy and dry periods) for 20 days. The samples collected from these periods have been analysed for physical and microbial measures before passing it through the serial filters with pore sizes of 500 μm, 100 μm, 10 μm and 1.5 μm to measure the retained particle mass. From the results, it was observed that: (1) the water quality at the free-phase zone was better than that at the tank's bottom; (2) the settleable bacteria rapidly sinked to bottom; (3) the correlation of turbidity, E. coli and total suspended solids (TSS) for all the rain events showed a relatively high Pearson's coefficient of 0.9 to one another; and (4) over 70% of settling TSS occurred within first 36 hours. Finally, it has been found that the physical sedimentation process can significantly reduce the microbial measures.

scholarly journals Results from a Psychology OER pilot program: faculty and student perceptions, cost savings, and academic outcomes

Open Praxis ◽  
2020 ◽  
Vol 12 (1) ◽  
pp. 83
Author(s):  
Juliana Magro ◽  
Sara V Tabaei
Keyword(s):  
Student Perceptions ◽  
Academic Outcomes ◽  
Cost Savings ◽  
Open Educational Resources ◽  
Pilot Program ◽  
Open Textbooks ◽  
The Impact ◽  
Pedagogical Changes ◽  
Better Than

This case study describes the library’s experience of collaborating with an undergraduate Psychology Department at Touro College to integrate open textbooks into their program. We discuss the pedagogical changes as well as explore the impact of Open Educational Resources (OER) on students’ savings, their academic outcomes and perceptions of OER. Furthermore, we highlight the successes and shortcomings in having the library as a central OER partner. To measure the results, we surveyed students and conducted a faculty survey and a focus group, in addition to analyzing the students’ final grades. This pilot program delivered strong results. The students’ perception was very positive, and faculty’s opinions on the textbooks used were mixed. Some professors felt that the textbook lacked important content, but because of its openness, they added their own content to the book. Students enrolled in OER courses performed better than those enrolled in the same courses using a commercial textbook.

scholarly journals WATER QUALITY ANALYSIS: A CASE STUDY IN BYRAMANGALA LAKE WATER AND SURROUNDING GROUND WATER

2017 ◽  
Vol 5 (4RASM) ◽  
pp. 71-77
Author(s):  
Babitha Rani ◽  
Dimple Bahri ◽  
Prabin Neupane ◽  
Kunal Kothari ◽  
Vishal Gadgihalli ◽  
...  
Keyword(s):  
Water Quality ◽  
Ground Water ◽  
Lake Water ◽  
Suspended Solids ◽  
Quality Analysis ◽  
Total Hardness ◽  
Water Quality Analysis ◽  
E Coli

A study was carried out to find out the water quality ofByramangala lake of Ramanagara district. The water quality of Byramangala lake water and ground water from bore wells situated in the area within 600 meters surrounding the lake was analyzed. The quality analysis of various parameters such as BODs, COD, DO, E-Coli, and pH, Total Dissolved Solids, Total Suspended Solids and Total Hardness were tested. In addition, the presence of metals such as Cadmium (Cd), Chromium (Cr), Lead (Pb), and Iron (Fe) in the lake water and ground water samples were tested. Results for the various tests conducted showed similar trends for both lake water and ground water. It was observed that certain parameters such as BOD5, and COD were beyond permissible limits as per the BIS standards for drinking water. A few remedial measures have been proposed that may help in mitigating the pollution in the selected project area Byramangala Lake.

PERFORMANCE EVALUATION OF A DEVELOPED PADDLE AERATOR ON CATFISH EFFLUENTS IN LAGOS STATE, NIGERIA

2017 ◽  
Vol 16 (1) ◽  
pp. 75-85
Author(s):  
O. E. OMOFUNMI ◽  
J. K. . ADEWUMI ◽  
A. F. ADISA ◽  
S. O. ALEGBELEYE
Keyword(s):  
Water Quality ◽  
Suspended Solids ◽  
Oxygen Demand ◽  
Total Suspended Solids ◽  
Dilution Ratio ◽  
Paddle Wheel ◽  
Lagos State ◽  
Total Ammonia ◽  
The Impact ◽  
Natural Purification

Catfish production is one of the largest segments of fish culture in Lagos State, Nigeria. However, catfish effluents, which usually deteriorate the environment, need to be controlled. The effect of paddle-wheel aerator in catfish effluent was evaluated. The volume of catfish effluent was collected into two basins and diluted at given ratios. The paddle-wheel aerator was installed in one basin, while another basin served as control in determining the impact of paddle wheel aerator on catfish effluents. Water qualities such as Total Suspended Solids (TSS), Total Nitrogen (TN), Total Phosphorus (TP), Total Ammonia (TNH3) and Nitrite (NO2-N) and Biochemical oxygen demand (BOD5) examined and ana-lysed. Results indicated that paddle-wheel aerator reduced TSS (24.4±1.5 %), TN2-N (53.3±1.2 %) , TNH3-N (65.2±1.2 %) , NO2-N (97.1±1.1 %) , TP (61.8±1.1 %) and BOD5 (54 ±1.5 %). com-pared with natural purification 33.9±1.6 % of TSS, 22.7±1.4 % of TN2-N, 29.3±1.6 % of TNH3-N, 53.9±1.2 % of NO2-N, 21.6±1.5 % of TP and 15.4±1.6 % of BOD5 at the same dilution ratio There were significant different (P ≤0.05) between paddle wheel aerator and natural purification in concen-trations reduction. The paddle wheel aerator was found to be relevant in the water quality improve-ment and thus recommend for small and medium scale fish farmers in controlling effluents.

Modelling the influence of total suspended solids on E. coli removal in river water

2015 ◽  
Vol 73 (6) ◽  
pp. 1320-1332 ◽  
Author(s):  
Jueying Qian ◽  
Evelyn Walters ◽  
Peter Rutschmann ◽  
Michael Wagner ◽  
Harald Horn
Keyword(s):  
Particle Size ◽  
Large Scale ◽  
Suspended Solids ◽  
Total Suspended Solids ◽  
Sensitivity Coefficient ◽  
Fecal Indicator ◽  
E Coli ◽  
Size Classes ◽  
Sedimentation Process ◽  
Particle Size Classes

Following sewer overflows, fecal indicator bacteria enter surface waters and may experience different lysis or growth processes. A 1D mathematical model was developed to predict total suspended solids (TSS) and Escherichia coli concentrations based on field measurements in a large-scale flume system simulating a combined sewer overflow. The removal mechanisms of natural inactivation, UV inactivation, and sedimentation were modelled. For the sedimentation process, one, two or three particle size classes were incorporated separately into the model. Moreover, the UV sensitivity coefficient α and natural inactivation coefficient kd were both formulated as functions of TSS concentration. It was observed that the E. coli removal was predicted more accurately by incorporating two particle size classes. However, addition of a third particle size class only improved the model slightly. When α and kd were allowed to vary with the TSS concentration, the model was able to predict E. coli fate and transport at different TSS concentrations accurately and flexibly. A sensitivity analysis revealed that the mechanisms of UV and natural inactivation were more influential at low TSS concentrations, whereas the sedimentation process became more important at elevated TSS concentrations.

scholarly journals Forms of Nitrogen and Phosphorus in Suspended Solids: A Case Study of Lihu Lake, China

2020 ◽  
Vol 12 (12) ◽  
pp. 5026 ◽  
Author(s):  
Jialu Li ◽  
Qiting Zuo
Keyword(s):  
Water Quality ◽  
Suspended Solids ◽  
Inorganic Phosphorus ◽  
Nitrogen And Phosphorus ◽  
Lake Ecosystems ◽  
Phosphorus Forms ◽  
Sequential Extraction Method ◽  
Main Component ◽  
The Impact

Suspended solids are an important part of lake ecosystems, and their nitrogen and phosphorus contents have a significant effect on water quality. However, information on nitrogen and phosphorus forms in suspended solids remains limited. Therefore, a case study was conducted in Lihu Lake (China), a lake with characteristically high amounts of suspended solids. Nitrogen and phosphorus speciation in suspended solids was analyzed through a sequential extraction method. We also evaluated the sources of various forms of nitrogen and phosphorus and their different effects on eutrophication. The total nitrogen (TN) content was 758.9–3098.1 mg/kg. Moreover, the proportions of various N forms in the suspended solids of the study areas were ranked as follows: Hydrolyzable nitrogen (HN) > residual nitrogen (RN) > exchangeable nitrogen (EN). Total phosphorus (TP) ranged from 294.8 to 1066.4 mg/kg, and 58.6% of this TP was inorganic phosphorus (IP). In turn, calcium (Ca)-bound inorganic phosphorus (Ca-Pi) was the main component of IP. The correlation between various nitrogen and phosphorus forms showed that there were different sources of suspended nitrogen and phosphorus throughout Lihu Lake. Correlation analysis of water quality indices and comparative analysis with surface sediments showed that in Lihu Lake, the dissolved nitrogen and phosphorus contents in water were influenced by sediment through diffusion, while particle phosphorus content in water was influenced by suspended solids through adsorption; however, due to the higher phosphorus contents in suspended solids, we should pay more attention to the impact of suspended solids.

scholarly journals Economic Empowerment of Pesantren Through Agribusiness (Study On Al-Mawaddah Entrepreneurial Pesantren)

2020 ◽  
Vol 3 (1) ◽  
pp. 15-31
Author(s):  
Muhammad Baqi Mustaghfiri
Keyword(s):  
Agricultural Sector ◽  
Field Research ◽  
Strategy Research ◽  
Analysis Technique ◽  
Dragon Fruit ◽  
Qualitative Descriptive ◽  
Three Stages ◽  
The Impact ◽  
Better Than

This paper aims for several research objectives. It aims to find out the agribusiness sectors developed by Al-Mawaddah Entrepreneurial Pesantren. It also aims to find out the empowerment of agribusiness developed by this pesantren. Last, it also aims to determine the impact of empowering agribusiness developed on improving the economy Al-Mawaddah Entrepreneurial Pesantren’s alumni. This research is a field research. The approach used by researcher is a qualitative descriptive approach with a case study strategy. Research location is at Pesantren Entrepreneur Al-Mawaddah Honggosoco Kudus RT. 06/ RW. 01, Jekulo District, Kudus Regency. Data collection techniques used are observation, interviews, and documentation. The data analysis technique used is descriptive qualitative. The results show that: (1) the agribusiness sector that was developed at Al-Mawaddah Entrepreneurial Pesantren touched only agriculture and educational sectors. It yet touches other agribusiness sectors, such as fisheries or livestock. The agricultural sector developed includes: agricultural food crops, such as: rice, corn, soybeans, vegetables, and cassava, fruit crops, such as: longan, and dragon fruit. They even plant within the premise sugar cane plantation; (2) Agribusiness Empowerment developed by Al-Mawaddah Entrepreneurial Pesantren consists of three stages, namely: input, process, and output; (3) Agribusiness entrepreneurship is better than working under other people (companies) because apart from freedom, the income generated is also higher.

Water quality criteria for total suspended solids (TSS) in urban wet-weather discharges

2006 ◽  
Vol 54 (6-7) ◽  
pp. 355-362 ◽  
Author(s):  
L. Rossi ◽  
R. Fankhauser ◽  
N. Chèvre
Keyword(s):  
Water Quality ◽  
Urban Areas ◽  
Suspended Solids ◽  
Quality Criteria ◽  
Aquatic Organisms ◽  
Total Suspended Solids ◽  
Water Quality Criteria ◽  
Combined Sewer Overflows ◽  
Wet Weather ◽  
Rain Events

Total suspended solids (TSS) from combined sewer overflows (CSOs) and stormwater discharges represent a crucial parameter for evaluating wet-weather pollution in urban areas. In fact, the increase of TSS in water during rain events can have ecotoxic effects on aquatic organisms. Furthermore, major potentially harmful substances such as heavy metals, PAHs and organic matter are adsorbed onto TSS and later settle on sediment. Water quality criteria for TSS consequently enable the risk of wet-weather pollution to be assessed, for instance to avoid detrimental effects on aquatic organisms. The criteria proposed in this study cover the short-term impact of TSS on fish (acute quality criteria AQC), taking into account the duration of their exposure in the receiving water. The concentration-exposure duration-effect curve proposed here thus predicts “ill effects” on fish for different exposure times and TSS concentrations. The ecotoxic effects of adsorbed pollutants are also taken into account with an additional safety factor. We implement this TSS criteria in a software that allows us to estimate the number of rain events that exceed a given morbidity threshold for fishes per year.

Lack of Environmental Policy and Water Governance

2021 ◽  
Vol 1 (2) ◽  
pp. 29-40
Author(s):  
Laeeq Janjua ◽  
Atteeq Razzak ◽  
Azeem Razzak
Keyword(s):  
Water Pollution ◽  
Economic Growth ◽  
Foreign Direct Investment ◽  
Direct Investment ◽  
Suspended Solids ◽  
Water Governance ◽  
Total Suspended Solids ◽  
Positive Influence ◽  
Indus River ◽  
The Impact

In Pakistan, water pollution is a cause of numerous health issue and water stress. The aim of writing this paper is to empirically investigate the impact of industrialization, foreign direct investment, and economic growth along with energy consumption on total suspended solids in the Indus River, which is used as a proxy for water pollution. The authors employed ARDL estimation to achieve the research objective. The findings revealed that in long-run economic growth, foreign direct investment inflows and industrialization have a positive influence on water pollution in the Indus River. Still, on the other hand, due to sustainable energy production, water pollution is falling in the Indus River. At the same time, in the short-run, economic growth causes reduction in total suspended solids, whereas industrialization is still a major cause of water pollution in the Indus River.

Modelling total suspended solids, E. coli and carbamazepine, a tracer of wastewater contamination from combined sewer overflows

2015 ◽  
Vol 531 ◽  
pp. 830-839 ◽  
Author(s):  
Khemngeun Pongmala ◽  
Laurène Autixier ◽  
Anne-Sophie Madoux-Humery ◽  
Musandji Fuamba ◽  
Martine Galarneau ◽  
...  
Keyword(s):  
Suspended Solids ◽  
Total Suspended Solids ◽  
Combined Sewer Overflows ◽  
E Coli ◽  
Combined Sewer ◽  
Sewer Overflows
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