scholarly journals Seasonal variations of chemical properties of water of the Kaptai lake, Rangamati, Bangladesh

2018 ◽  
Vol 6 (2) ◽  
pp. 11-17
Author(s):  
Mohammed Mukhlesur Rahman ◽  
M Mahfuzur Rahman ◽  
Mohammed Kamrul Huda
Keyword(s):  
Ph Value ◽  
Chemical Properties ◽  
Oxygen Demand ◽  
Biological Oxygen Demand ◽  
K Value ◽  
Standard Methods ◽  
Project Area ◽  
Disturbed Area ◽  
Four Seasons

The chemical properties are the most important factors in the aquatic environment. The present study was carried out to analyze the chemical properties of the water of the Kaptai lake, Rangamati. The investigation was done from December, 2007 to November, 2008, during four seasons in two sites and three sub-sites. The main aim of the present research was to analyze the water quality of the Kaptai lake. Chemical properties of the water of this lake were determined by different standard methods. The chemical properties of water varied in different sites and seasons. The value of pH and dissolved oxygen (DO) was higher in undisturbed (UD) area than in less disturbed (LD) and disturbed (D) area (UD>LD>D). The nitrate (NO3) value was higher in disturbed area than undisturbed and less disturbed area (D>UD>LD). The phosphate (PO4) value was higher in less disturbed area than disturbed and undisturbed area (LD>D>UD). The electrical conductivity (EC), biological oxygen demand (BOD) chemical oxygen demand (COD) were higher in disturbed area than less disturbed and undisturbed area (D>LD>UD). The potassium (K) value was LD>UD>D. The pH value was higher in winter (W) than in late monsoon (LM), early monsoon (EM) and monsoon (M) (W>LM>EM>M). The NO3 -1 value was EM>M>LM>W>EM. The PO4 -2 value was LM>M>W>EM. The EC value was W>LM>M>EM. The biological oxygen demand (BOD) value was EM> W>LM>M. The DO value was higher in monsoon than late monsoon, early monsoon, and winter (M>LM>EM>W). The COD was EM>M>W>LM. The K value was EM>W>M>LM. The highest value of pH, K, NO3 and BOD were recorded in the Kaptai hydroelectricity project area (site –A) and the highest value of the DO, EC and COD were recorded in the Longudu area (site-B). This study is the first initiative to assess the detail chemical properties of water of the Kaptai lake.Jahangirnagar University J. Biol. Sci. 6(2): 11-17, 2017 (December)

Survey of the Water Quality of the Bahar County Streams (Iran) by NSFWQI

2015 ◽  
Vol 16 (SE) ◽  
pp. 395-403
Author(s):  
Abbas Ghaffari Habib ◽  
Seyed Hadi Khatami
Keyword(s):  
Water Quality ◽  
Dissolved Oxygen ◽  
Fecal Coliform ◽  
Agricultural Sector ◽  
Oxygen Demand ◽  
Total Dissolved Solids ◽  
Biological Oxygen Demand ◽  
Dissolved Solids ◽  
The Mean

In Bahar County (Iran), rivers are among the important sources of water for the agricultural sector. Therefore, this research evaluated the parameters of temperature, pH, Total Dissolved Solids (TDS), turbidity, nitrate, total phosphate, dissolved oxygen (DO), Biological Oxygen Demand (BOD5), and fecal coliform at five stations for five months (from February 2015 to June 2015) to determine water quality in the rivers. Based on this evaluation, the NSFWQI index was calculated and, finally, the routes of the rivers were zoned. The best water quality was recorded at Station Number 3 with the NSFWQI Value of 80 in January, and the worst at Station Number 5 (latgah) with the NSFWQI Value of 37 in June. Based on the mean NSFWQI indices, water quality was Medium at Stations Number 1, 2, and 4, good at Station Number 3, and bad at Station number 5.

The Effects of Quality Changes in Pomfret (Pampus argenteus) Fillets from Different Treatments during Chilled Storage

2014 ◽  
Vol 1051 ◽  
pp. 378-382
Author(s):  
Wei Qing Lan ◽  
Jing Xie ◽  
Feng Zhu ◽  
Rui Qi Zhu
Keyword(s):  
Shelf Life ◽  
Sensory Quality ◽  
Ph Value ◽  
Modified Atmosphere Packaging ◽  
Modified Atmosphere ◽  
Total Volatile ◽  
K Value ◽  
Chilled Storage ◽  
Pampus Argenteus

The effects of modified atmosphere packaging (MAP: 80%CO2/20%O2) and chitosan (CS: 10.0g/L) on the shelf-life of pomfret (Pampus argenteus) fillets during chilled storage were studied. Quality assessment was based on biochemical (total viable counts (TVC), total volatile base nitrogen (TVB-N), tri-methylamine (TMA-N), K-value, pH value) and sensory analysis indices determination. The results showed that MAP and CS could keep the sensory quality of Pampus argenteus, delay its deteriorating speeds and slow down the increase of K-value effectively. Compared with the control samples, the shelf-life of pomfret samples in MAP and CS stored at 4±1°C were 10, 12d respectively.

Effect of the Addition of Tomato Powder on the Color and Storage Quality of Red Sausage

2013 ◽  
Vol 781-784 ◽  
pp. 1419-1423
Author(s):  
Wei Dong Xu ◽  
Qian Chen ◽  
Yi Ding ◽  
Song Wang ◽  
Li Huang ◽  
...  
Keyword(s):  
Ph Value ◽  
Meat Products ◽  
Chemical Properties ◽  
Potential Solution ◽  
Storage Quality ◽  
Nitrite Level ◽  
Residual Nitrite ◽  
Tomato Powder ◽  
And Storage

This study includes the investigation of the chemical properties such as pH value anda*-value, sensorial evaluations, residual nitrite and the oxidation level of Chinese-style sausagered sausage, which have been produced by both reducing the nitrite level ( 50mg/kg, 100mg/kg and 150mg/kg) and adding tomato powder ( 0%, 2% and 4%). According to the results, 100mg/kg of nitrite together with 2% tomato powder is better. Then the sausages produced with 100mg/kg nitrite and 2% tomato powder, along with sausage which produced with only 150mg/kg of nitrite are stored at 4 °C for 45 days. It was observed that addition of 2% of tomato powder increased degradation of nitrite and decreased the level of oxidation. This study provides a potential solution for nitrite substitute in meat products.

Fecal and Coliform Levels as Indicative Factors in Deterioration of the Water Quality of

2014 ◽  
Vol 10 (1) ◽  
Author(s):  
EUKENE OPORTO BENSIG ◽  
MARY JOYCE L. FLORES ◽  
FLEURDELIZ F. MAGLANGIT
Keyword(s):  
Water Quality ◽  
Surface Waters ◽  
Physicochemical Parameters ◽  
Oxygen Demand ◽  
Aquatic Ecology ◽  
Total Dissolved Solids ◽  
Biological Oxygen Demand ◽  
Indicator Bacteria ◽  
The Difference

The use of surface waters such as rivers for domestic, agricultural andindustrial purposes have made them vulnerable to pollution leading to impairedwater quality. The water quality of Lahug River in Cebu City was evaluated usingcoliforms as indicators, in relation with physicochemical parameters such as biological oxygen demand (BOD), conductivity, dissolved oxygen (DO), nitrate,pH, phosphate, salinity, temperature, total dissolved solids (TDS) and totalsuspended solids (TSS). Sampling was done once a month from November 2011to April 2012 in three stations covering the upstream, midstream and downstream.The multiple tube fermentation technique was used for the analysis of coliforms.The level of these indicator bacteria increased from the upstream towards thelower reaches of the river especially in the months of February to April; however,the difference in values across time was not significant. This implies that therewas a continuous fecal pollution in the river. There were no statistically significantcorrelations between FCs and TCs with the physicochemical parameters. Anegative relationship was observed among FCs and TCs with pH, TSS, DOand nitrate (p>0.05). These results suggest the presence of sewage and organicpollutants in the river.Keywords: Aquatic Ecology, water quality, coliform, physicochemical parameters,experimental design, Philippines

scholarly journals QUALITY STUDY OF DOMESTIC WASTEWATER IN RIVERS PASSING THROUGH MANADO CITY BASED ON ORGANIC AND INORGANIC MATERIALS

2013 ◽  
Vol 1 (1) ◽  
pp. 55
Author(s):  
Adianse Tarigan ◽  
Markus T. Lasut ◽  
Sandra O. Tilaar
Keyword(s):  
River Mouth ◽  
Oxygen Demand ◽  
Domestic Wastewater ◽  
Biological Oxygen Demand ◽  
Inorganic Materials ◽  
Water Quality Status ◽  
Quality Study ◽  
Three Rivers ◽  
The City

Study on the quality of domestic wastewater in rivers passing through Manado City to Manado bay was done based on organic and inorganic materials. The study aimed to provide suitable information for environmental management of rivers and beaches in the city. Three rivers were selected to be observed, such as S. Bailang, S. Maasing and S. Tondano, using parameter of Biological Oxygen Demand-5 days (BOD5), Phosphate (PO4) and Nitrate (NO3). Water samples were taken from three locations (upper, middle and river mouth parts) in each rivers. The result showed that average concentrations of the parameters, respectively, were 2 mg/L, 0.014 mg/L and 0.388 mg/L in S. Bailang; 17.66 mg/L, 1.858 mg/L and 0.029 mg/L in S. Maasing; and 4 mg/L, 0.289 mg/L and 0.314 mg/L in S. Tondano. In this paper, water quality status of the observed rivers based on current regulation was discussed.

scholarly journals Penyisihan Parameter TSS dan COD Menggunakan Koagulan Nanokitin dan Kitosan pada Pengolahan Air Sungai Cikapundung

2019 ◽  
Vol 5 (1) ◽  
Author(s):  
Memey Suhaya Putri ◽  
Etih Hartati ◽  
Djaenudin Djaenudin
Keyword(s):  
River Water ◽  
Government Regulation ◽  
Ph Value ◽  
Negative Impact ◽  
Oxygen Demand ◽  
Quality Standard ◽  
Coagulation And Flocculation ◽  
Measurement Results ◽  
Time Variations

<p>The use of excessive synthetic coagulants and continuously will have a negative impact because of the increasing amount of mud volume can accumulate in the human body. The quality of Cikapundung River water has decreased every year, so it is necessary to treat Cikapundung River water through a process of coagulation and flocculation using coagulants made from nanocytin, chitosan and commercial chitosan. Measurement of these parameters uses the gravimetric and titrimetri method. The dose of coagulant used in the process of coagulation and flocculation is 10 mg / L, by varying the pH value of pH 5, pH 7 and pH 9 and the flocculation time variations of 15 minutes, 20 minutes and 25 minutes. The measurement results showed with a dose of coagulant 10 mg / L, commercial chitosan pH 5 flocculation times of 25 minutes can reduce the TSS concentration of 12 mg / L with 99.38% total suspended allowance. Concentration of Chemical Oxygen Demand 13.12 mg / L with 98.91% allowance. The TSS value has fulfilled the quality standard according to Government Regulation Number 82 of 2001 concerning Management of Water Quality and Water Pollution Control in the first class.</p>

scholarly journals Effect of vinasse (spentwash) on quality of soil and sugarcane- A review

2019 ◽  
Vol 34 (01) ◽  
Author(s):  
Vishal Goyal ◽  
M. R. Meena ◽  
Sukhdev Kumar
Keyword(s):  
Field Experiments ◽  
Chemical Properties ◽  
Oxygen Demand ◽  
Low Ph ◽  
Sugarcane Variety ◽  
Physico Chemical ◽  
Sugarcane Yield ◽  
Harvesting Method ◽  
Indian Law

Vinasse produced by fermentation of molasses has to be paid particular attention due to its potentially huge impacts. The chemical composition of vinasse differs depending upon the soil, sugarcane variety, harvesting method and industrial method of ethanol production. For obvious reasons, as per the Indian Law, there are restrictions on its disposal in water bodies. Detailed and extensive studies and field experiments on soil and crop mostly show that vinasse is excellent manure which not only positively affects the physico-chemical properties of the soil but also helps in increasing the sugarcane yield. But due to some objectionable characteristics (low pH, high biochemical oxygen demand etc.), its judicious use is essential.

scholarly journals OPTIMIZATION OF COAGULATION-FLOCCULATION PROCESS FOR TREATMENT OF INDUSTRIAL TEXTILE WASTEWATER USING NOPAL CACTUS POWDER

2020 ◽  
Vol 1 (2) ◽  
pp. 40-43
Author(s):  
Tran Thanh Đat ◽  
Trinh Trong Nguyen ◽  
Thai Van Nam
Keyword(s):  
Ph Value ◽  
Oxygen Demand ◽  
Textile Wastewater ◽  
Wastewater Sample ◽  
Stirring Time ◽  
Natural Coagulants ◽  
Textile Wastewater Treatment ◽  
Flocculation Process ◽  
Best Parameters

Using natural coagulants derived from available and popular plants ensures the quality of wastewater discharged, saving costs for businesses, environmentally friendly. SEM results show that surface of the material is rough with the multi-layered structure that increases the contact areas, deep holes with undefined shapes on materials will increase diffusion and absorption of dirty residues of different sizes. To investigate the effectiveness of textile wastewater treatment by dried Nopal Cactus powder, the Jartest model was used to identify the best parameters for handling color levels and chemical oxygen demand (COD) treatment of artificial wastewater sources. Jartest experiment identified the best values for removing color levels and COD: pH = 3, dried Nopal Cactus powder amount of 100mg/L, stirring velocity of 40 rpm; stirring time of 10 minutes. The efficiency of processing color levels and COD with the best parameters are 87.85% and 60.21%, respectively. Regarding the efficiency of processing textile wastewater, there shows an average color reduction efficiency (52.89%), low-level COD treatment (25.56%). Optimal result: with dyeing textile wastewater sample, the input COD value is 260 mg/L, the color level is 470Pt-Co. The experiment with 36 test modes is run by STAGRAPHIC XV software and analyzed by ANOVA combination of 2 variables COD and color levels, the results with the highest performance for the color level and COD are 77.07% and 59.11% respectively. The optimal pH value is 2.6, the amount of dried Nopal Cactus powder is 80 mg/L, stirring velocity is 40.0 rpm, the time is 8.2 minutes

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