Quality of treated wastewater of Pan African Paper Mills (E. A.) Ltd

2008 ◽  
pp. 15-36
Keyword(s):  
Treated Wastewater ◽  
Paper Mills ◽  
Pan African

Study of Advanced Oxidation Technology on Post Treatment Wastewater of Pulp & Paper Mills

2014 ◽  
Vol 955-959 ◽  
pp. 2697-2700
Author(s):  
Ting Zhi Liu ◽  
Shuai Li ◽  
Fang Chang ◽  
Hao Yu Wang
Keyword(s):  
Fenton Oxidation ◽  
Treated Wastewater ◽  
Treatment Technology ◽  
Reaction Conditions ◽  
Paper Mills ◽  
Initial Ph ◽  
Advanced Oxidation Technology ◽  
Oxidation Technology ◽  
Optimized Conditions

In this article, Fenton oxidation treatment technology was employed to the improving of quality of post treated wastewater from pulp & paper mills in order to increase the recycling ratio of final treated wastewater. The reaction conditions were optimized through single-factor experiments and the removal of color were tested for the optimizing. It was found in this study that the color of Fenton oxidation treated water was variegated with the extending of settling time. The optimized conditions were: Dosage of H2O2 was 682.1mg/L(30% m/m), 1.5 times theoretical consumption, 205mg/L FeSO47H2O (H2O2:FeSO4=15:1), the initial pH and the reaction time were 4.5 and 40min, respectively. The removal of the color and COD were 51.3% and 80% after Fenton treatment. GC-MS analysis shown that the contents of organic extracts and most of organic compounds reduced significantly after the oxidational treatment.

DECOLOURIZATION AND COD REMOVAL OF WASEWATER FROM ETHANOL PRODUCTION PROCESS FROM MOLASSES BY COAGULANTION USING INORGANIC ALUM

2010 ◽  
Vol 13 (3) ◽  
pp. 92-102
Author(s):  
Trung Duc Le
Keyword(s):  
Ethanol Production ◽  
Oxygen Demand ◽  
Cod Removal ◽  
Treated Wastewater ◽  
Treatment Processes ◽  
Physico Chemical ◽  
Biological Methods ◽  
Treatment Step ◽  
Main Material

The industrial production of ethanol by fermentation using molasses as main material that generates large quantity of wastewater. This wastewater contains high levels of colour and chemical oxygen demand (COD), that may causes serious environmental pollution. Most available treatment processes in Vietnam rely on biological methods, which often fail to treat waste water up to discharge standard. As always, it was reported that quality of treated wastewater could not meet Vietnameses discharge standard. So, it is necessary to improve the treatment efficiency of whole technological process and therefore, supplemental physico-chemical treatment step before biodegradation stage should be the appropriate choice. This study was carried out to assess the effect of coagulation process on decolourization and COD removal in molasses-based ethanol production wastewater using inorganic coaglutant under laboratory conditions. The experimental results showed that the reductions of COD and colour with the utilization of Al2(SO4)3 at pH 9.5 were 83% and 70%, respectively. Mixture FeSO4 – Al2(SO4)3 at pH 8.5 reduced 82% of colour and 70% of COD. With the addition of Polyacrylamide (PAM), the reduction efficiencies of colour, COD and turbidity by FeSO4 – Al2(SO4)3 were 87%, 73.1% and 94.1% correspondingly. It was indicated that PAM significantly reduced the turbidity of wastewater, however it virtually did not increase the efficiencies of colour and COD reduction. Furthermore, the coagulation processes using PAM usually produces a mount of sludge which is hard to be deposited.

scholarly journals Development of Košice Region by Implementation of Environmental Projects in the Field of Water Management - Case Study

2014 ◽  
Vol 33 (4) ◽  
Author(s):  
Henrieta Pavolová ◽  
Adriana Csikósová ◽  
Tomáš Bakalár
Keyword(s):  
Water Management ◽  
Agricultural Production ◽  
Wastewater Treatment Plants ◽  
Environmental Issues ◽  
Environmental Benefits ◽  
Treated Wastewater ◽  
Management Case Study ◽  
Application Specific

AbstractThe development of the regions in Slovakia in recent years has significant disparities in both so-cio-economic as well as environmental issues, as evidenced by the eight environmentally polluted areas (these areas are highly urbanised with industrial agglomerations or intensive agricultural production).This article deals with a management system model of regional by implementation of projects in environmental field of water management with application-specific benefits and risks arising from the process of their implementation in relation to regional development. It analyses projects in the area of water management of one of the regions of Slovakia, KoŠice region in particular, in terms of connection to public water duct and sewer, identifes a strategy for development of the region and its socio-economic and environmental benefits based on the analysis of drinking water, the quan-tity and quality of treated wastewater through wastewater treatment plants (WTPs). It identifes the infuencing factors of benefits and risks and proposes procedure for solving at various stages.

scholarly journals Impact of Partially Treated Wastewater on Downstream Water Quality of Notwane River in Botswana

2018 ◽  
pp. 1-9
Author(s):  
Gilbert K. Gaboutloeloe ◽  
Gugu Molokwe ◽  
Benedict Kayombo
Keyword(s):  
Water Quality ◽  
Pearson Correlation ◽  
Oxygen Demand ◽  
Ammonia Nitrogen ◽  
Treated Wastewater ◽  
Nitrate N ◽  
River Stretch ◽  
Ph Range ◽  
The Impact

The impact of partially treated wastewater on the water quality of Notwane river stretch in the Gaborone region of Botswana was investigated. Water samples collected at effluent discharge point and three other sampling sites downstream were analyzed for pH, temperature, Biological Oxygen Demand (BOD5), Ammonia-nitrogen (Ammonia-N) and Nitrate-nitrogen (Nitrate-N). Sampling was conducted bi-weekly between February 2013 and April 2013. The ranges of measured parameters were:  pH (7.6-8.5), temperature (22-23ºC), BOD5 (11.2-27.0 mg/l), Ammonia-N (2.4-60.5 mg/l), Nitrate-N (20.6-28.6 mg/l). Analysis of variance, Games-Howel multiple comparisons and Pearson correlation were used to separate variable means. The results signal river non-point pollution due to runoff inflow of organics mainly from land use and domestic waste dumping by nearby dwellings. Temperature, BOD5, and pH range values were all within the Botswana Bureau of Standards (BOBS) limit while the maximum Ammonia-N and Nitrate-N were above BOBS limit by 50.5 mg/l and 6.6 mg/l, respectively. Regulations on indiscriminate waste dumping and discharge standards adherence should be enforced.

Application of treated wastewater for cultivation of carnations

2013 ◽  
Vol 8 (3-4) ◽  
pp. 457-460 ◽  
Author(s):  
I. Petousi ◽  
N. Stavroulaki ◽  
M. Fountoulakis ◽  
M. Papadimitriou ◽  
E.I. Stentiford ◽  
...  
Keyword(s):  
Plant Growth ◽  
Domestic Wastewater ◽  
The Other ◽  
Treated Wastewater ◽  
Potted Plants ◽  
Quality Water ◽  
Water Scarce ◽  
Micro Elements ◽  
Positive Effect

The reuse of domestic wastewater for irrigation of floriculture crops is a very promising option in water-scarce areas. On the other hand, there are concerns about the effect of that kind low-quality water on plant growth. The present work examined the effect of irrigation with several type of treated domestic wastewater on production of carnations. Potted plants were irrigated with primary treated, secondary treated and tertiary treated wastewater as well as with water and water with fertilizer. The results shown that carnations can be irrigated with treated wastewater as the growth and quality of plant is equal or better compared with water. Furthermore, it was found that nutrients and micro-elements contained in treated wastewater had as a result positive effect on characteristics of carnations.

scholarly journals Assessment of the Impact of Sewage Storage Ponds on the Water Environment in Surrounding Area

Proceedings ◽  
2020 ◽  
Vol 51 (1) ◽  
pp. 20
Author(s):  
Kairat Ospanov ◽  
Timur Rakhimov ◽  
Menlibai Myrzakhmetov ◽  
Dariusz Andraka
Keyword(s):  
Water Quality ◽  
Water Environment ◽  
Quality Parameters ◽  
Treated Wastewater ◽  
Groundwater Aquifer ◽  
Sewage Ponds ◽  
Basic Quality ◽  
The Impact

The paper presents the results of research on the environmental impact of sewage ponds serving the city of Kostanay (Kazakhstan). The scope of the research included the determination of basic quality parameters of raw and treated wastewater, an analysis of the chemical composition of groundwater in the vicinity of sewage ponds, and the analysis of the water quality of the Tobol River. The obtained results indicate that sewage from storage ponds, infiltrating into the ground, caused groundwater pollution in the area of about 100 km2 around the reservoirs. Due to the fact that the groundwater aquifer in the vicinity of sewage ponds feeds the Tobol River, it also affects water quality in the river, which does not meet the requirements for most of the analyzed parameters.

In situ UV monitoring of wastewater: a response to sample aging

2004 ◽  
Vol 49 (1) ◽  
pp. 47-52 ◽  
Author(s):  
E. Baurès ◽  
C. Berho ◽  
M.-F. Pouet ◽  
O. Thomas
Keyword(s):  
Low Temperature ◽  
Process Control ◽  
Treated Wastewater ◽  
Wastewater Sample ◽  
Line Measurement ◽  
Regulation Compliance

The phenomenon of wastewater sample aging is supposed to be treated with a low temperature autosampler. This work presents two examples of treated wastewater, the quality of which varies with the time of conservation. This evolution may pose some problems with respect to regulation compliance or process control. After the explanation of the mechanisms involved in sample aging, some recommendations are proposed in order to improve the UV off-line measurement of TSS and COD of treated wastewater.

scholarly journals Effect of using treated wastewater on the bacteriological quality of raw cows milk: A case of a farm in Northeastern Algeria

2020 ◽  
Vol 14 (8) ◽  
pp. 436-446
Author(s):  
Chorfi Keltoum ◽  
Bendjemana Katia ◽  
Ayachi Ammar ◽  
Mahdi Fatma ◽  
El Aimane Bouzidi Nour
Keyword(s):  
Treated Wastewater ◽  
Bacteriological Quality ◽  
Northeastern Algeria

Reuse of wastewater treated by infiltration percolation

1996 ◽  
Vol 33 (10-11) ◽  
pp. 401-408
Author(s):  
Naïla Ouazzani ◽  
Khadija Bousselhaj ◽  
Younes Abbas
Keyword(s):  
Organic Matter ◽  
High Capacity ◽  
Farm Animals ◽  
Treated Wastewater ◽  
Nitrogen And Phosphorus ◽  
Mean Values ◽  
Fertilizer Value ◽  
Effect Of Treatment ◽  
Raw Wastewater

The aim of this work was to determine the depuration efficiencies of an infiltration percolation plant to remove organic matter and nutrients (N and P) and to test the effect of treatment by such system on the fertilizer value of wastewater compared to untreated influent and a control (groundwater). Results of investigations carried out over a month of each season showed the high capacity of this depuration system to remove both particulate and dissolved organic matter (TSS 91%, COD 93% and dCOD 89 to 95%) at all season. Nitrogen and phosphorus were more eliminated at winter and summer. At spring they presented a low percent removal efficiency due probably to overloaded influent. Tests consisting in the reuse a raw wastewater (RW), settled wastewater (SW) or completely treated wastewater (FW) for irrigation of (Lolium perenne) plots showed that biomass yield, nutrients (N,P) exported by plants and protein amount in the plants tissue decreased from plots irrigated by (RW) to completely treated wastewater. But all of them were more important than in the control plants (irrigated by groundwater) and exceeded the mean values reported in literature for meadows plants. The amount of nitrogen and P2O5) applied during the irrigation by wastewater, was equivalent or superior to recommanded dose of fertilizer for meadows. The expected meat or milk production showed a promising potentiality to promove the nutritional quality of farm animals food by using treated wastewater.

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