scholarly journals Removal of Turbidity and Sludge Production from Industrial Process Wastewater Treatment by a Rejection of Steel Rich in FeCl3 (SIWW)

2021 ◽  
Vol 11 (5) ◽  
pp. 13359-13376
Keyword(s):  
Industrial Wastewater ◽  
Liquid Waste ◽  
Industrial Process ◽  
High Load ◽  
Pollution Load ◽  
Test Technique ◽  
Jar Test ◽  
Process Wastewater ◽  
Flocculation Process ◽  
Sludge Production

The pollution of industrial wastewater in Morocco poses serious problems for the environment. These effluents must be treated before discharge into the receiving environment. In this work, industrial steel wastewater (SIWW), rich in FeCl3 30%, was used as a useful and profitable coagulant and as liquid waste to be recovered in the treatment of wastewater. The coagulation-flocculation process using ferric chloride was studied using the Jar Test technique. The results obtained using FeCl3 30% (SIWW) have shown that the pH has a very significant effect on reducing turbidity for three types of polluting loads: high load, medium load. The reduction of turbidity and sludge production by FeCl3 30% (SIWW) is a function of the pollutant load of the wastewater to be treated and the pH. The higher the pollution load, the higher the optimal concentration of FeCl3 30% (SIWW). The 30% FeCl3 made it possible to remove more than 95% of the turbidity at a high load. In conclusion, industrial rejection rich in FeCl3 could be used to reduce the turbidity of industrial refinery wastewater considerably.

APPLICATION OF THE FLOCCULATION PROCESS IN THE INDUSTRIAL WASTEWATER TREATMENT

2016 ◽  
Vol 15 (3) ◽  
pp. 521-526
Author(s):  
Narcis Barsan ◽  
Mariana Turcu ◽  
Emilian Mo.negu.u ◽  
Mihaela Dascalu ◽  
Dana Chitimus ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Industrial Wastewater ◽  
Industrial Wastewater Treatment ◽  
Flocculation Process

Penerapan Teknologi Fitoremediasi untuk Menghilangkan Kadar COD dan TSS pada Air Buangan Industri Tahu

2021 ◽  
Vol 6 (2) ◽  
pp. 77-85
Author(s):  
Muhammad Al Kholif ◽  
Ida Istaharoh ◽  
Pungut ◽  
Joko Sutrisno ◽  
Sri Widyastuti
Keyword(s):  
Plant Growth ◽  
Environmental Pollution ◽  
Residence Time ◽  
Industrial Wastewater ◽  
Liquid Waste ◽  
Preliminary Test ◽  
Research Process ◽  
Water Sampling ◽  
Initial Stage ◽  
Initial Content

Tofu industrial wastewater is a contributor to environmental pollution. Wastewater contains high levels of COD and TSS. The purpose of this study was to determine the effectiveness of reducing pollutant loads in tofu liquid waste by using the phytoremediation method using water jasmine (Echinodorus Palaefolius). The initial stage of the research was a preliminary test to determine the initial content of the waste. The acclimatization process is carried out by observing the process of plant growth during the research process. To maximize plant growth, dilution is carried out with various concentrations of 25% wastewater with 75% diluting water and 50% wastewater with 50% diluting water. Sampling was carried out every 12 hours for 5 days. The results showed that the highest effectiveness of COD reduction occurred in RFT 25% with a residence time of 12 hours at 39.83%, while for TSS parameters the highest effectiveness was at RFT 25% with a residence time of 12 hours by 69%.

Treatment of Textile Wastewater using Biodegradable Flocculants of Chitosan and Extracted Pandan Leaves

2013 ◽  
Vol 64 (1) ◽  
Author(s):  
Norzita Ngadi ◽  
Nor Aida Yusoff
Keyword(s):  
Solvent Extraction ◽  
Extraction Method ◽  
Textile Wastewater ◽  
Settling Time ◽  
Turbidity Removal ◽  
Test Experiment ◽  
Jar Test ◽  
Solvent Extraction Method ◽  
Flocculation Process

The study investigated the performance of chitosan and extracted pandan leaves towards treatment of textile wastewater by using flocculation process. Pandan leaves were extracted by using solvent extraction method. Flocculation process was conducted using a Jar test experiment. The effect of dosage, pH, and settling time on reduction of COD, turbidity and color of textile wastewater was studied. The results obtained found that chitosan was very effective for reduction of COD, turbidity, color and indicator for color. The best condition for COD and turbidity removal was achieved at 0.2 g dosage, pH 4 and 60 minutes of settling time. Under this condition, about 58 and 99% of COD and turbidity was removed, respectively. However, the results obtained using extracted pandan was opposite compared to the chitosan. Extracted pandan was not able to remove both COD and turbidity of the waste. 

Performance of basaltic dust issued from an asphaltic plant as a flocculant additive for wastewater treatment

2004 ◽  
Vol 49 (1) ◽  
pp. 147-154
Author(s):  
R.M. Ramírez Zamora ◽  
A. Chávez Mejía ◽  
R. Domínguez Mora ◽  
A. Durán Moreno
Keyword(s):  
Wastewater Treatment ◽  
Municipal Wastewater ◽  
Oxide Content ◽  
Test Results ◽  
Test Technique ◽  
Jar Test ◽  
Physicochemical Characterisation ◽  
Wastewater Samples ◽  
Two Stages ◽  
Positive Effect

The feasibility of using basaltic dust as a flocculant additive or coagulant aid for wastewater treatment was assessed in this research. The experimental study was divided into two stages: 1) physicochemical characterisation of the basaltic dust by applying standardised techniques, and 2) evaluation of this material as flocculant additive for the coagulation-flocculation of wastewater treated for reuse. Coagulation-flocculation experiments were carried out in the laboratory with a mixture of industrial and municipal wastewater samples collected from two points of the final discharge of the Mexico City sewerage system. Aluminium sulphate and lime were used as coagulants and the basaltic dust as flocculant additive, by applying the jar-test technique. The results of the corrosivity, reactivity, explosiveness, toxicity, inflammability and biological risk tests indicated that this material is classified as a non-hazardous waste (according to the Mexican legislation, NOM-052-ECOL-1993). The density, oxide content and particle size values of basaltic dust were similar to those reported for the flocculant additive denominated activated silica. The jar test results showed a positive effect of basaltic dust over the effluent and sludge qualities, to the extent that coagulant doses can be reduced 30% (from 150 mg/L to 110 mg/L of Al2(SO4)3).

Catalytic ozonation for odour removal of high temperature alumina refinery condensate

2012 ◽  
Vol 66 (8) ◽  
pp. 1781-1786 ◽  
Author(s):  
Xinguang Wang ◽  
Jing Guan ◽  
Richard M. Stuetz
Keyword(s):  
Industrial Wastewater ◽  
Industrial Process ◽  
Catalytic Ozonation ◽  
Ozone Treatment ◽  
Experimental Conditions ◽  
Before And After ◽  
Removal Efficiencies ◽  
Odour Emissions ◽  
Odour Removal ◽  
Dynamic Olfactometry

Odour emissions from aluminium processing can cause an impact on local communities surrounding such facilities. Of particular concern is fugitive odours emitted from the handling and use of refinery condensate streams, particularly the digestion condensate. This study evaluated the application of using catalytic ozonation to treat alumina refinery condensate in order to remove the potential emission of odourous compounds from the industrial wastewater. The technical challenges in treating the alumina refinery condensate are the high pH and temperatures of the wastewater effluent (over 80 °C and pH above 10) due the industrial process. The odour removal efficiencies for different catalysts (FeCl3, MnO, and MnSO4) under experimental conditions in terms of controlled pH, temperature and ozone dosage were determined before and after ozone treatment using dynamic olfactometry. The result demonstrated that the addition of both FeCl3 and MnO catalysts improved odour removal efficiencies during the ozonation of alumina condensates at similar pH and temperature conditions. FeCl3 and MnO had similar enhancement for odour removal, however MnO was determined to be more appropriate than MnSO4 for odour removal due to the colouration of the treated condensate.

scholarly journals Zinc Removal from ZnO Industrial Wastewater by Hydroxide Precipitation and Coagulation Methods: The Role of pH and Coagulant Dose

2020 ◽  
Vol 11 (2) ◽  
pp. 35-42
Author(s):  
Ratnawati Ratnawati
Keyword(s):  
Reaction Time ◽  
Industrial Wastewater ◽  
Waste Treatment ◽  
Liquid Waste ◽  
Reaction Times ◽  
Quality Standards ◽  
Government Regulations ◽  
Zinc Removal ◽  
Zn Concentration

Liquid waste from the ZnO industry must be treated to meet the quality standards of wastewater into water bodies, according to the Minister of Environment Regulations No.5, 2014. It still contains 79 mg/L of Zn metal, cloudy with turbidity above 500 NTU, and COD value around 222 mg/L. This study aims to determine the effect of pH on reducing Zn metal and the coagulant dose to minimize turbidity and COD in liquid waste produced by the ZnO factory in Depok, West Java. The waste treatment has been carried out by adding alkaline to neutralize the acid conditions in the equalization basin. However, the results have not met the requirements. It is necessary to vary the pH (8.5; 9.0; 9.5; 10.0 and 10.5) to precipitate of Zn optimally, modify the dose of coagulants (50; 100 and 150 mg/L) and reaction times (10; 15 and 20 minutes) to reduce its turbidity and COD concentration. The best results were obtained at a pH of 9.5 with a coagulant dose of 50 mg/L and a reaction time of 10 minutes. This condition can reduce Zn concentration (79 to 3.71 mg/L), turbidity (557 to 1.42 NTU), COD (222 to 68 mg/L) with a removal efficiency of 95.3%; 99.7%; and 69.4% respectively. These values have met the standard requirements according to government regulations.

scholarly journals Effects of Liquid Wastes from Tofu Industries on Water Quality in Parangan River, Magelang District, Central Java-Indonesia

2021 ◽  
Vol 325 ◽  
pp. 03003
Author(s):  
Wiwik Widyaningrum ◽  
Margaretha Widyastuti
Keyword(s):  
Water Quality ◽  
Water Quality Management ◽  
Liquid Waste ◽  
Pollution Index ◽  
Pollution Load ◽  
Index Method ◽  
Central Java ◽  
Permissible Levels ◽  
Water Quality Status ◽  
Liquid Wastes

Continued entries of liquid wastes generated by tofu industries into nearby rivers might deteriorate the water quality if disposed of without prior treatments. The research objectives were to determine the liquid waste quality from tofu productions near Parangan River (Magelang, Indonesia), assess the river water quality and investigate the effects of the liquid waste on pollution load and water quality status. With this information, the research can help determine pollutant load allocation in the river and provide the basis for formulating water quality management policies if it is not contaminated or pollution controls if otherwise. This research employed purposive sampling, direct measurements in the field, laboratory tests, descriptive-comparative analysis, mass balance and pollution index method. The results showed that the pH, temperature, COD, BOD, TSS and ammonia levels of the liquid wastes had surpassed their maximum permissible levels. Similarly, the river’s COD, BOD and ammonia contents did not meet the water quality standards. With BOD, a pollution load indicator, exceeding the total maximum daily load, the water quality statuses at monitoring points S2, S3 and S4 were categorised into slightly polluted. It means that the liquid waste generated by the tofu industries has detrimental effects on the water quality of the Parangan River.

scholarly journals PENGARUH VARIASI MEDIA DAN JUMLAH TUMBUHAN TYPHA LATIFOLIA TERHADAP PENURUNAN KADAR BOD DAN COD PADA LIMBAH CAIR INDUSTRI TAHU DI SIDOARJO

2021 ◽  
Vol 6 (1) ◽  
pp. 1-9
Author(s):  
Lily Oktavia ◽  
Mohammad Taufiq ◽  
Muchammad Tamyiz
Keyword(s):  
Wastewater Treatment ◽  
Industrial Wastewater ◽  
Liquid Waste ◽  
Typha Latifolia ◽  
Percentage Reduction ◽  
Rapid Progress ◽  
Detention Time ◽  
Soil Media ◽  
Wetland System ◽  
Research Stage

Sidoarjo Regency is one of the supporting districts of East Java province. Sidoarjo Regency is experiencing rapid progress because of the development and potential in trade and industry. One of the industries often found in Sidoarjo Regency is tofu factory. The rapid number of tofu craftsmen industry has caused an increase in the volume of liquid waste which also flows into water bodies. The purpose of this study was to determine the reduction in BOD and COD levels for the tofu factory wastewater treatment in the Sepande area, Sidoarjo Regency using a contructed wetland with Typha latifolia as the remediator. The research stage will be carried out using a laboratory scale using acclimatization as the adaptation stage of Typha latifolia and a crontructed wetland reactor as phytoremediation processing. Based on the results and discussion, it can be concluded that there was a decrease in BOD and COD levels in the tofu industrial wastewater in Sidoarjo using the Constructed Wetland system. The percentage reduction in BOD content was greatest in soil media with 3 stems of Typha latifolia plants and a detention time of 4 days of 72%. While the largest percentage reduction in COD levels was in soil media with 2 stems of Typha latifolia plants and 4 days of detention time of 84%.

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