Reuse Feasibility of Electrocoagulated Metal Hydroxide Sludge of Textile Industry in the Manufacturing of Building Blocks

Abstract

During the last decade, the growing load of sludge from textile industries, the top foreign exchange earning sector of Bangladesh, is a common nuisance to environmental system and community health. The present study was aimed to minimize the environmental impact from the disposal of Electrocoagulated Metal Hydroxide Sludge (EMHS) by using it as a partial substitute of clay in the manufacturing of construction material like building blocks (BBs). Different batches of normal and pressurized building blocks (NBBs and PBBs, resp.) were prepared using up to 50% EMHS with clay and then fired at a particular temperature. EMHS proportion in the mixture and firing temperature were two key factors determining the quality of BB. BB did not show any deformation or uneven surfaces at any of the examined firing temperature. At higher firing temperature and EMHS proportion, more weight loss and shrinkage of BB were noticed. Higher compressive strength and lower water adsorption were found at lower EMHS content and higher firing temperature. It was explored that NBB and PBB with 20 and 30% EMHS in clay, respectively, and fired at 1050 °C would be usable for nonloading applications; namely, ornamental bricks, decoration purposes, and fence of garden.

Synthesis and characterization of α-Fe2O3/γ-Fe2O3-nanoparticles from recyclable electro-coagulated sludge: insights and predictions for different application

“…It can be noticed that the oxidative transformation of iron hydroxide/oxyhydroxide and ferrite containing electro-coagulated sludge to maghemite and hematite through subsequent temperature. From the electro-coagulated metal hydroxide sludge, different elements detected and dominantly were iron about 83% as reported by Adyel et al [42], out of the twentytwo elements that have been executed. It is aggregates, dispersive aggregates corresponding to the top surface layer of the powdered EC sludge products.…”

Removal of Lead from Battery Effluent by Electrocoagulation

“…In addition, EC process could generate less amount of sludge than conventional chemical treatment option. The sludge generated from this technique is known as electrocoagulated metal hydroxide sludge that can be further used in other purposes, likely building block materials (Adyel et al 2012(Adyel et al , 2013.…”

Electrocoagulation Sludge Valorization—A Review

“…Adyel et al [37] studied the use of electrocoagulated metal hydroxide sludge (EMHS) produced during the EC treatment of textile industry wastewater as a component of building blocks used in construction. Main characteristics of sludge were Fe (87.1% of total mass of sludge), Mg (7.3%), Si (4.8%) and Ca (0.5%).…”