Lightweight aggregate (LWA) production with sewage sludge and municipal solid waste incineration (MSWI) fly ash is an effective approach for waste disposal. This study investigated the stability of heavy metals in LWA made from sewage sludge and MSWI fly ash. Leaching tests were conducted to find out the effects of MSWI fly ash/sewage sludge (MSWI FA/SS) ratio, sintering temperature and sinteri...

This study aimed to apply the Taguchi optimization technique to determine the process conditions for producing synthetic lightweight aggregate (LWA) by incorporating tile grinding sludge powder with reservoir sediments. An orthogonal array L16(4⁵) was adopted, which consisted of five controllable four-level factors (i.e., sludge content, preheat temperature, preheat time, sintering temperature,...

• Water treatment sludge (WTS) is incorporated to expanded clay for LWA production. The expanding properties of are slightly reduced with WTS addition. LWAC formulated commercial similar containing WTS. can be revalorised by an industrial by-product which has recently been classified as a waste the European Commission. main goal this work valorise produce lightweight aggregates. Formulations su...

In this study, waste concrete fine aggregates and cement are applied to sludge solidification resource recycling. The unconfined compressive strength (UCS) test is performed investigate the variation in stress–strain properties of solidified with content particle size aggregate, content, curing time. results show that incorporating can improve UCS cement-solidified sludge, which achieve optimum...

Enzymes are used extensively as industrial bio-catalysts in various manufacturing and processing sectors. However, commercial enzymes expensive part due to the high cost of nutrient medium for biomass culture. Activated sludge (AS) is a waste product biological wastewater treatment consists microbial that degrades organic matter by producing substantial quantities hydrolytic enzymes. Recovering...

Volumetric diameters Dv and specific surface area SpS of sludge particles formed during chemical coagulation and electrocoagulation of sewage were determined. The obtained aggregate-flocs differed substantially in both Dv and SpS values. The differences in Dv and SpS values of the analyzed particles were interpreted based on theoretical models for expanding aggregates. The most uniform particle...

The process of granule formation in upflow anaerobic sludge blanket (UASB) reactors was studied using oligonucleotide hybridization probes. Two laboratory-scale UASB reactors were inoculated with sieved primary anaerobic digester sludge from a municipal wastewater treatment plant and operated similarly except that reactor G was fed glucose, while reactor GP was fed glucose and propionate. Size ...

Biological processes, such as activated sludge and granular sludge are widely used to remove organic pollutants as well as inorganic pollutants, such as metallic elements1–3, which are known to be potentially toxic, and impact the performance of biological waste treatment processes4. Granular sludge is a dense aggregate of microorganisms, minerals, and microbial produced compounds such as extra...