THE DESIGN AND ANALYSIS OF EXPERIMENTS. By Oscar Kempthorne. New York, John Wiley and Sons, Inc., 1952. 631 pp. $8.50. This book by a teacher of statistics (as well as a consultant for \"experimenters\") is a comprehensive study of the philosophical background for the statistical design of experiment. It is necessary to have some facility with algebraic notation and manipulation to be able to use the volume intelligently. The problems are presented from the theoretical point of view, without such practical examples as would be helpful for those not acquainted with mathematics. The mathematical justification for the techniques is given. As a somewhat advanced treatment of the design and analysis of experiments, this volume will be interesting and helpful for many who approach statistics theoretically as well as practically. With emphasis on the \"why,\" and with description given broadly, the author relates the subject matter to the general theory of statistics and to the general problem of experimental inference. MARGARET J. ROBERTSON

The Design and Analysis of Experiments

Application of low-cost adsorbents for dye removal – A review

https://cyberleninka.org/article/n/999493.pdf

New trends in removing heavy metals from industrial wastewater

Activation of persulfate (PS) and peroxymonosulfate (PMS) and application for the degradation of emerging contaminants

Landfill leachate treatment: Review and opportunity

The sequencing batch reactor (SBR) process was used for the treatment of raw landfill leachate. Optimum preliminary parameters of leachate/activated sludge ratio, powdered activated carbon (PAC) dosage, and settling time were studied. Optimum obtained parameters (mixing ratio of 10%, PAC dosage of 10 g/L, and settling time of 1.5 h) were applied on two types of SBRs, namely, non-powdered and powdered activated carbon (NPAC and PAC, respectively). Consequently, the effect of factors, the aeration rate and contact time, on both NPAC and PAC reactors were studied. Response surface methodology was used for the design, analysis, and optimization of the experiments. Removal efficiencies of ammonia (NH3-N), color, chemical oxygen demand (COD), total dissolved salts (TDS), and sludge volume index (SVI) were measured for 13 experiments. Based on the obtained results, the optimum aeration rate and contact time for both NPAC and PAC reactors were 2 and 1 L/min and 5.56 and 5.5 h, respectively. Better performance (in...

Optimum Process Parameters for the Treatment of Landfill Leachate Using Powdered Activated Carbon Augmented Sequencing Batch Reactor (SBR) Technology

The aim of this research was to optimize bioremediation of seawater samples spiked with 1000 mg/L crude oil for removal of n-alkanes (C12H26 to C34H70). Bioaugmentation experiments were performed at laboratory scale: each bioreactor contained 250 ml dispersed crude-oil-contaminated seawater, indigenous acclimatized microorganism and nitrogen and phosphorus at concentrations based on central composite design (CCD) calculations. Three independent variables, time, nitrogen and phosphorus, were investigated and the experimental data obtained were fitted to a second-order polynomial mathematical model with multiple regressions. The obtained Model F-value of 97.12 and probability F

https://ijer.ut.ac.ir/article_251_e9701b02d98f62ca0cde675a1c1a4689.pdf

Enhancement Biodegradation of n-alkanes from Crude Oil Contaminated Seawater

Stabilized leachate generated from an aged sanitary landfill is typically classified as nonbiodegradable. The ion exchange technique has been rarely used for the treatment of stabilized landfill leachate, particularly for the removal of color and nonbiodegradable substances (measured as chemical oxygen demand [COD]). Thus, this study was undertaken to examine the effectiveness of anion-exchange resin (i.e., INDION FFIP MB) in removing color and COD from stabilized semi-aerobic landfill leachate in Malaysia. To predict the performance of the process, the effects of anion exchanger dosage, shaking speed, contact time, and pH on pollutant removal efficiency were investigated. Adsorption of color and COD was realistically explained through Langmuir and Freundlich isotherms. Adsorption kinetics mechanism was studied using reaction-based models. The anionic resin efficiently removed 91.2% color and 69.4% COD at pH 3 and removed only 69.4% color and 60.3% COD at pH 9. The color and COD adsorption data w...

Color and Chemical Oxygen Demand Removal from Mature Semi-Aerobic Landfill Leachate Using Anion-Exchange Resin: An Equilibrium and Kinetic Study

Leachate is a highly complex and polluted wastewater that is produced by the interaction of percolating water through the body of a landfill. Treatment of landfill leachate is essential as it could threaten the surrounding ecosystem. The aim of this research was to determine the efficiency of polyaluminum chloride (PACl) in removing chemical oxygen demand (COD), ammoniacal nitrogen (NH 3-N) and color from two different landfill sites in Malaysia. The optimum dosage in removal of these parameters was determined and found to be lower for Kulim Landfill Site (KLS) than Ampang Jajar Landfill Site (AJLS). At optimum dosage of PACl as coagulant, the COD removal for KLS was higher than that obtained for AJLS. The removal of color for both sites was almost similar. The removal NH 3-N was rather moderate for both the landfill sites with KLS exhibiting relatively higher removal rates.

http://www.isca.in/rjcs/Archives/v1/i3/05.pdf

Hamidi Abdul Aziz

Papers

Optimum Process Parameters for the Treatment of Landfill Leachate Using Powdered Activated Carbon Augmented Sequencing Batch Reactor (SBR) Technology

Enhancement Biodegradation of n-alkanes from Crude Oil Contaminated Seawater

Color and Chemical Oxygen Demand Removal from Mature Semi-Aerobic Landfill Leachate Using Anion-Exchange Resin: An Equilibrium and Kinetic Study

The use of Polyaluminum Chloride for the treatment of Landfill Leachate via Coagulation and Flocculation processes

Control and Treatment of Landfill Leachate for Sanitary Waste Disposal