Rice husk carbon (RHC) has been prepared from rice husk impregnated with 50% H3P04 and carbonised at 300°C. Its adsorption capacity has been tested for the decolourization of wastewater containing safranine and methylene blue. The effect of system variables such as concentration, temperature, pH, contact time, adsorbent dosage and particle size are investigated. Removal of dye has been found to...

The efficiency of solar heterogeneous TiO2 photocatalysis and homogeneous photo-Fenton reaction for removal of Lambda Cyhalothrin, Chlorpyrifos and Diazinon from pesticide wastewater industry was investigated. The effluent quality was not complying for discharge into sewerage network. Therefore, adsorption of the remaining portions of pesticides using powdered activated carbon (PAC) was assesse...

We consider a control problem for a single bioreaction occuring in a continuous and well mixed bioreactor, assuming that the bioreaction’s kinetics is not represented by a validated model. We develop a nonlinear controller and prove the global asymptotic stability of the closed loop system towards the equilibrium corresponding to the set point. Since this control law needs the knowledge of some...

Monitoring and control of redox processes are key to operate wastewater chemical treatment plants at high-loading-rate whilst rejecting concentration and composition disturbances. Carbon dioxide concentration and oxidationreduction potential (ORP) are selected as key inferential measurements of oxidation kinetics and oxidant reagent consumption. An extremum-seeking control cascade is proposed f...

Overuse of antibiotics has resulted in widespread contamination the environment and triggered antibiotic resistance pathogenic bacteria. Conventional wastewater treatment plants (WWTPs) are not equipped to remove antibiotics. Effluents from WWTPs usually primary source aquatic environments. There is an urgent need for cost-effective, environment-friendly technologies address this issue. Along w...

Hospital wastewater contributes a significant input of pharmaceuticals into municipal wastewater. The combination of suspended activated sludge and biofilm processes, as stand-alone or as hybrid process (hybrid biofilm and activated sludge system (Hybas™)) has been suggested as a possible solution for hospital wastewater treatment. To investigate the potential of such a hybrid system for the re...

The spread of antibiotic-resistant bacteria is a growing problem and a public health issue. In recent decades, various genetic mechanisms involved in the spread of resistance genes among bacteria have been identified. Integrons - genetic elements that acquire, exchange, and express genes embedded within gene cassettes (GC) - are one of these mechanisms. Integrons are widely distributed, especia...

The effect of temperatures below 20 degrees C (20, 15 and 10 degrees C) on the anaerobic degradation pathway and kinetics of domestic wastewater fractionated at different sizes was studied in a fluidized-bed batch reactor. The overall degradation pathway was characterized by a soluble fraction degrading according to zero-order kinetics and a colloidal fraction (between 0.45 and 4.5 microm) that...

The activated carbon loaded with manganese (GAC-Mn) was prepared and optimized for the treatment of acid red wastewater. Scanning electron microscope-energy dispersive spectrometer (SEM-EDS), Brunner-Emmett-Teller surface area (Sbet) analysis results revealed that successfully on larger specific obtained. kinetics study indicated removal GAC-Mn followed pseudo-second-order model.