Optimization of COD and Color Removal for Matang’s Landfill Leachate Treatment by Using Polyaluminum Chloride

2015 ◽  
Vol 802 ◽  
pp. 478-483 ◽  
Author(s):  
Mohd Faiz Muaz Ahmad Zamri ◽  
Mohd Suffian Yusoff ◽  
Hamidi Abdul Aziz ◽  
Mohd Anuar Kamaruddin
Keyword(s):  
Mixing Time ◽  
Treatment Method ◽  
Leachate Treatment ◽  
Polyaluminum Chloride ◽  
Mixing Speed ◽  
Rapid Mixing ◽  
Coagulant Dosage ◽  
Physico Chemical ◽  
Variation Explained ◽  
Flocculation Process

In this research, a physico-chemical treatment method of coagulation-flocculation process is implemented in treating partially stabilized leachate from Matang Landfill, Perak, Malaysia. Central composite design has been used to optimize the independent variables namely polyaluminum chloride (PAC) coagulant dosage (A), rapid mixing speed (B) and rapid mixing time (C). The experimental results were analyzed by using analysis of variance (ANOVA). The results revealed that the percentage of color and COD removal was found increased by increasing rapid mixing speed with optimum removal of 95 % and 56 % respectively. Besides, the R-squared values implied that 86.22 % and 97.34% of the total variation explained by the model equation. Furthermore, the model analysis revealed that rapid mixing speed were significant for removal of color and COD through single parameter (B) and interaction between parameter (AB) respectively. This finding proves the influence of mixing parameter in coagulation-flocculation process for leachate treatment.

scholarly journals Compost leachate treatment using polyaluminium chloride and nanofiltration

2017 ◽  
Vol 15 (1) ◽  
pp. 123-128 ◽  
Author(s):  
Marjana Simonič
Keyword(s):  
Zeta Potential ◽  
Isoelectric Point ◽  
Oxygen Demand ◽  
Treatment Method ◽  
Aluminium Chloride ◽  
Leachate Treatment ◽  
Physico Chemical ◽  
Pre Treatment ◽  
Ph Range ◽  
Compost Leachate

AbstractLaboratory scale filtration tests utilizing leachate were conducted to investigate fouling and filtration performance of nanofiltration membranes. The work presented in this study is conducted on real samples rather than model water. Physico-chemical analyses showed that the leachate contained a lot of organic substances, exceeding 20000 mg/L O2 expressed as chemical oxygen demand. Proper pre-treatment method must be chosen in order to reduce fouling index. Coagulation pre-treatment using poly-aluminium chloride was chosen. Two thin film polysulfone membranes were used, purchased by Osmonic Desal. The focus of this research is to assess the influence of the particle size and zeta-potential of the colloidal fraction in leachate on nanofiltration performance. The isoelectric point of both membranes was 4.7 and 4.3, respectively. The fouled membranes were negatively charged over the pH range with isoelectric point shifting to the left (lower pH) indicating the foulant material mainly not charged. It was confirmed by its zeta-potential, measured at -2 mV.

Application of sodium ferrate produced from industrial wastes for TOC removal of surface water

2019 ◽  
Vol 79 (7) ◽  
pp. 1263-1275
Author(s):  
H. Momtazpour ◽  
S. Jorfi ◽  
T. Tabatabaie ◽  
A. A. Pazira
Keyword(s):  
Surface Water ◽  
Mixing Time ◽  
Industrial Effluents ◽  
Industrial Wastes ◽  
Optimum Conditions ◽  
Mixing Speed ◽  
Rapid Mixing ◽  
Operating Variables ◽  
Toc Removal ◽  
Water Response

Abstract This study aimed to investigate the effect of sodium ferrate synthesized from industrial effluents (SF-W) and that of synthetized from analytical grade chemicals (SF-O) on total organic carbon (TOC) removal from surface water. Response surface methodology (RSM) was used to optimize the operating variables such as pH, dosing rate, rapid mixing time, and gentle mixing speed on TOC removal. A TOC removal of 89.805% and 79.79% was observed for SF-O and SF-W, respectively. Ferrate as SF-O and SF-W demonstrated 26.67% and 8.51% more TOC removal at a lower dosage compared to conventional chemicals such as chlorine, ozone, poly aluminum chloride (PAC) and polyelectrolyte. The optimum conditions of the independent variables including sodium ferrate (SF-O and SF-W), pH, rapid mixing time and gentle mixing speed were found to be 1.54 mg/L and 2.68 mg/L, 8.5, 30 s at 120 rpm for coagulation followed by 20 min of gentle mixing. Economic analysis showed that the application of SF instead of conventional chemicals provides a significant reduction in operational costs by about 68%, mainly because of the reduction of chemicals and energy consumption.

Optimization of the Coagulation Process for Kaolin and Humic Acid Removal Using Polymeric Aluminum Ferric Sulfate

2015 ◽  
Vol 1088 ◽  
pp. 353-357 ◽  
Author(s):  
Zhen Zhen Jiang ◽  
Yang Chen ◽  
Jun Ren Zhu
Keyword(s):  
Humic Acid ◽  
Removal Efficiency ◽  
Mixing Time ◽  
Ferric Sulfate ◽  
Single Factor ◽  
Mixing Speed ◽  
Rapid Mixing ◽  
Coagulation Process ◽  
Coagulation Performance ◽  
Slow Mixing

In the paper, the optimization of the coagulation process for Kaolin and humic acid removal using polymeric aluminum ferric sulfate (PAFS) was studied. In order to obtain the maximum turbidity and humic acid removal efficiency of Kaolin and humic acid simulated wastewater, the optimum coagulation conditions was investigated with the factors of mixing speed and time. Furthermore, mixing speed and time including parameters affecting the coagulation performance such as rapid mixing speed, rapid mixing time, slow mixing speed and slow mixing time using single factor and orthogonal array L9 (34) analysis were examined. The results showed that the optimum single factor of mixing speed and time indicated rapid mixing speed of 350 rpm, rapid mixing time of 1.0 min, slow mixing speed of 60 rpm and slow mixing time of 20 min. Then the orthogonal optimization experiment of mixing speed and time indicated maximum HA removal efficiency was 97.5% at rapid mixing speed of 350 rpm, rapid mixing time of 1.25 min, slow mixing speed of 60 rpm, and slow mixing time of 20 min.

scholarly journals Caracterisation Physico-Chimique Du Lixiviat De La Decharge Sauvage De Meknes

2017 ◽  
Vol 13 (33) ◽  
pp. 154 ◽  
Author(s):  
Zakariae Mejraoua ◽  
Nasser-Eddine Zine
Keyword(s):  
Ph Value ◽  
Physicochemical Characterization ◽  
Chemical Characterization ◽  
Treatment Method ◽  
Organic Pollution ◽  
Mineral Concentration ◽  
Leachate Treatment ◽  
Physico Chemical ◽  
Combined Action ◽  
One Year

Solid and urban waste produced by the municipality of Meknes amounts to more than 185.103 tons annually. Since 2002 they have been transported to a landfill controlled, wild of an area of 23 hectares on the outskirts of the Commune. This discharge is unfortunately devoid of a leachate treatment device (brownish liquid effluent, produced under the combined action of rainwater and fermentation of buried waste). This study aims to make a physico-chemical characterization and evaluate the states mineral and organic of this leachate. It should be noted that this physicochemical characterization is arbitrary because this discharge will soon be equipped with a waste disposal and recovery center (CEV) using Evalixm as a treatment method. Since 2014, the company '' SUEZ ''Environment began to put in place under control this discharge. For the realization of this characterization, we carried out a series of sampling leachate from June 2014 to June 2015. During this period, the physico-chemical analyzes carried out on these samples, revealed: - low levels of nitrates (NO3 - max = 18,1 mg / L) and phosphates (PO4 3- max = 0,38mg / L) - high levels of ammonium (NH4 + max = 54,13 mg / L) and nitrites (NO 2 - , max = 27,67mg / L). This mineral concentration is translated by a high electrical conductivity which has reached a maximum value of 7.35 10 3 μS / cm. Organic pollution estimated by the pollutant load is important; the values of the Calculated DCO from 1205 to 9207 mg O2 / L with an average of 4808 mg O2 / L, those of DBO are between 53 and 386 mg O2/ L for an average of 157 mg O2 / L. The values of the ratio DBO5 / DCO oscillate between 0.01 and 0.08 with an average of 0.04. This which testifies to the anaerobic character that prevails at the level of the discharge and a probable contamination of the water table. The hydrogen variant (pH) between 6,42 and 8,99 is an annual average of 8,42 which shows that the leachate produced by the landfill is basic. The pH value shows a stagnation (8.42 and 8.23) from one year to the next, reflecting its stability and aging

Treatment of Industrial Textile Wastewater Using Polyarcrylamide (PAM) and Polyaluminium Chloride (PAC)

2013 ◽  
Vol 60 (1) ◽  
Author(s):  
Norzita Ngadi ◽  
Noor Yahida Yahya ◽  
Nabilah Muhamad
Keyword(s):  
Textile Wastewater ◽  
Settling Time ◽  
Color Removal ◽  
Operating Parameters ◽  
Polyaluminum Chloride ◽  
Test Experiment ◽  
Mixing Speed ◽  
Jar Test ◽  
Flocculation Process ◽  
Polyaluminium Chloride

Dalam kajian ini, poliacrylamid (PAM) dan polialuminium klorida (PAC) telah digunakan sebagai bahan pengental untuk merawat air sisa industri tekstil. Eksperimen ini telah dijalankan dengan menggunakan ujian balang. Kesan dos, kelajuan percampuran dan masa pemendapan ke atas keberkesanan proses flokulasi telah dikaji. Air sisa yang terawat dianalisis untuk penyingkiran warna, pengurangan COD dan pengurangan kekeruhan. Keputusan yang diperolehi menunjukkan bahawa PAM adalah lebih baik daripada PAC dalam merawat air sisa tekstil. PAM mencatatkan penurunan parameter tertinggi, iaitu 6 NTU untuk kekeruhan, 744 mg / l untuk COD, dan scala kurang daripada 0.5 untuk warna. Prestasi tebaik PAM dicapai pada dos 0.07 g dan apabila proses flokulasi dijalankan pada 200 rpm kelajuan percampuran dan 30 min masa pemendapan. Kajian ini juga mendapati bahawa parameter operasi yang dikaji (iaitu dos, kelajuan percampuran dan masa pemendapan) tidak banyak mempengaruhi ke atas penyingkiran warna, dan penurunan kekeruhan dan COD apabila PAC digunakan sebagai bahan pengental. Kata kunci: Pengelompokan; poliacrylamid (PAM); polialuminium klorida (PAC); air sisa tekstil In this study, polyacrylamide (PAM) and polyaluminum chloride (PAC) was used as a flocculant to treat industrial textile wastewater. The experiment was conducted using a Jar test experiment. The effect of dosage, mixing speed and settling time on the performance of the fflocculation process was investigated. The treated textile wastewater was analyzed by its color removal, turbidity and COD reductions. The results obtained showed that PAM performed better in treating the textile wastewater compared to PAC.PAM recorded the highest reduction of parameters, which are 6 NTU for turbidity, 744 mg/l for COD, and scale less than 0.5 for colour. The best performance of PAM was achieved at dosage 0.07 g and when the flocculation process was conducted at 200 rpm of mixing speed and 30 min of settling time. It was also found that the investigated operating parameters (i.e. dosage, mixing speed and settling time) did not influence much on removal of color and reduction of turbidity and COD when PAC was used as flocculant. Keywords: Flocculation; polyacrylamide (PAM); polyaluminum chloride (PAC); textile wastewater

The Role of Rapid Mixing Time on a Flocculation Process

1985 ◽  
Vol 17 (6-7) ◽  
pp. 1091-1101 ◽  
Author(s):  
R. J. François ◽  
A. A. Van Haute
Keyword(s):  
Kinetic Parameters ◽  
Mixing Time ◽  
Experimental Results ◽  
Rapid Mixing ◽  
Coagulation And Flocculation ◽  
Reaction Constant ◽  
Floc Characteristics ◽  
Floc Strength ◽  
Flocculation Process

The influence of the duration of rapid mixing on a flocculation process is evaluated by investigating the characteristics of the hydroxide flocs formed under carefully controlled conditions. Two different methods are used for measuring floc dimensions and their distribution. From the experimental results other floc characteristics such as floc strength and size of the flocculi are deduced. Also the reaction constant, the destabilization factor and the growing constant of the coagulation and flocculation process are calculated. Using the influence of rapid mixing time on all floc characteristics and kinetic parameters minimum and maximum limits for the rapid mixing time are deduced.

scholarly journals Effects of using Tamarindus indica Seeds as a natural coagulant aid in landfill leachate treatment

2018 ◽  
Vol 20 (2) ◽  
pp. 373-380 ◽  
Keyword(s):  
Landfill Leachate ◽  
Tamarindus Indica ◽  
Test Procedures ◽  
Leachate Treatment ◽  
Polyaluminum Chloride ◽  
Natural Coagulant ◽  
Operational Conditions ◽  
Jar Test ◽  
Uncontrolled Landfill ◽  
Flocculation Process

Uncontrolled landfill leachate generation portends danger to the environment and aquatic ecosystem, especially without prior treatment before discharge. The application of Al-based coagulants, such as polyaluminum chloride (PACl), has the potential of introducing Al residuals into water bodies. Therefore, an alternative natural coagulant was recommended to reduce the usage of Al-based coagulants. In this study, a coagulation–flocculation process using the combination of PACl as coagulant and Tamarindus indica seed (TiS) as coagulant aid was used in treating the landfill leachate from the Alor Pongsu Landfill Site in Malaysia. Some of the optimum operational conditions determined were the pH and dosage of the coagulant aid, and their effect was considered on parameters, such as suspended solids (SS), color, and COD, using standard jar test procedures. The combination of TiS flocculant reduced the dosage of PACl coagulant from 5,000 mg/L to 2,750 mg/L with removal efficiencies of 99.3%, 97.3%, and 67.4% for SS, color, and COD, respectively.

Influence of velocity gradient and rapid mixing time on flocs formed by polysilica iron (PSI) and polyaluminum chloride (PACl)

2013 ◽  
Vol 51 (22-24) ◽  
pp. 4729-4735 ◽  
Author(s):  
Tugrul Selami Aktas ◽  
Megumu Fujibayashi ◽  
Chikako Maruo ◽  
Munehiro Nomura ◽  
Osamu Nishimura
Keyword(s):  
Velocity Gradient ◽  
Mixing Time ◽  
Polyaluminum Chloride ◽  
Rapid Mixing

scholarly journals Multi-Response Optimization of Coagulation and Flocculation of Olive Mill Wastewater: Statistical Approach

2021 ◽  
Vol 11 (5) ◽  
pp. 2344
Author(s):  
Srikanth Vuppala ◽  
Riyaaz Uddien Shaik ◽  
Marco Stoller
Keyword(s):  
Grey Relational Analysis ◽  
Research Work ◽  
Olive Mill Wastewater ◽  
Relational Analysis ◽  
Coagulation And Flocculation ◽  
Coagulant Dosage ◽  
Response Optimization ◽  
Grey Relational ◽  
Flocculation Process ◽  
Olive Mill

Olive oil production is one of the important industrial sectors within the agro-food framework of the Mediterranean region, economically important to the people working in this sector, although there is also a threat to the environment due to residues. The main wastes of the olive oil extraction process are olive mill wastewater (OMW) and olive husks which also require proper treatment before dismissal. In this research work, the main goal is to introduce grey relational analysis, a technique for multi-response optimization, to the coagulation and flocculation process of OMW to select the optimum coagulant dosage. The coagulation and flocculation process was carried out by adding aluminum sulfate (Alum) to the waste stream in different dosages, starting from 100 to 2000 mg/L. In previous research work, optimization of this process on OMW was briefly discussed, but there is no literature available that reports the optimal coagulant dosage verified through the grey relational analysis method; therefore, this method was applied for selecting the best operating conditions for lowering a combination of multi-responses such as chemical oxygen demand (COD), total organic carbon (TOC), total phenols and turbidity. From the analysis, the 600 mg/L coagulant dosage appears to be top ranked, which obtained a higher grey relational grade. The implementation of statistical techniques in OMW treatment can enhance the efficiency of this process, which in turn supports the preparation of waste streams for further purification processes in a sustainable way.

scholarly journals Effect of Praestol as a Coagulant-Aid to Improve Coagulation-Flocculation in Dye containing Wastewaters

2015 ◽  
Vol 18 (1) ◽  
pp. 38-46 ◽  
Keyword(s):  
Ionic Strength ◽  
Aqueous Solutions ◽  
Removal Efficiency ◽  
Dye Removal ◽  
Settling Time ◽  
Solution Ph ◽  
Polyaluminum Chloride ◽  
Flocculation Process ◽  
Flocculation Time

<div> <p>This study was conducted to investigate the effect of praestol, as a coagulant-aid, to improve coagulation-flocculation process in the removal of disperse red 60 from aqueous solutions. The effect of various parameters including coagulants dose (10-1000 mg l<sup>-1</sup>), praestol dose (0-1000 mg l<sup>-1</sup>), solution pH (3-11), initial dye concentration (100-500 mg l<sup>-1</sup>), flocculation speed (30-60 rpm), flocculation time (15-30 min), settling time (5-60 min) and ionic strength (0-6 mg l<sup>-1</sup>) was evaluated on the dye removal. The dye removal efficiency was substantially increased by using praestol in the concentration of 80 mg l<sup>-1 </sup>and 400 mg l<sup>-1 </sup>for coagulation with alum and polyaluminum chloride (PACl), respectively. The maximum dye removal by alum coupled with praestol (Al-P) and PACl coupled with praestol (PA-P) was found to be 97.8% and 98.7%, respectively that were occurred at pH 7. The results showed that the application of PA-P or Al-P can be effectively used to remove disperse red 60 (DR 60) in aqueous solutions.</p> </div> <p>&nbsp;</p>

Sign in / Sign up

Export Citation Format

Share Document