Most of the developing countries particularly Indonesia will be facing the dilemmatic problems of sludge pressure in next decades due to increasing the legal and illegal loggings as well as the land and water demands resulting from the population growth, improved standard of people living and urbanization as well as economic and industrial developments. Consequence, there will be facing also th...

Municipal wastewater sludges are complex fluids displaying non-Newtonian characteristics. Whilst rheological properties of sludges are very important for the design and operation of wastewater treatment facilities, there is a lack of information regarding these properties, particularly for mixtures of primary and secondary sludges. The rheology of wastewater treatment sludge has been widely stu...

A complex activated sludge model implemented in BioWin software has been implemented to assure its predictability and improve the effectiveness of biological wastewater treatment in the fullscale plant in Poland. The influence of temperature and sludge retention time (SRT) on the quality of the effluent was also studied. The calibration was successfully performed according to the Good Modelling...

Activated sludge process is a biological process that is widely used in the domestic and industrial wastewater treatment in over the world. The foam formation is often reported in wastewater treatment plants which are related to this process. Some operational problems can be created by foaming, such as effluent quality deteriorates, the creation of malodorous, increased time requirements in ord...

With the increase in population in many of the big cities and the growing industrialization in many countries, the pollution load on the environment is increasing. Of particular concern is the waste containing pathogenic bacteria, parasites and viruses. Reduction of non-organic and organic pollutants as well as destruction of bacterial flora became very important and urgent practical issue. For...

Municipal and industrial wastewater treatment plants produce large amounts of sludge. This excess sludge is an inevitable drawback inherent to the waste activated sludge process. Both the reduction of the amount of sludge produced and improving its dewaterability are of paramount importance. Novel pre-treatment processes have been developed in order to improve sludge dewatering, handling and di...

Toxic compounds in sewage or industrial wastewater may inhibit the biological activity of activated sludge impairing the treatment process. This paper evaluates the Inhibition Capacity Index (ICI) for the assessment of activated sludge in the presence of toxicants. In this study, activated sludge was obtained from industrial treatment plants and was also synthetically produced. Continuous respi...

Fats and oils are the most common contaminants in wastewater and are usually discarded 17 through physical processes. This paper studies its elimination through an environmentally friendly 18 biological treatment, yielding good results on both laboratory scale and in the field. In this study a 19 comparative evaluation of the biodegradation of fats and oils in two scenarios were developed in 20...

Almost three years on from commissioning, the unique $30M domestic wastewater treatment approach developed by Hastings District Council (HDC) and consultants MWH has proven itself to be leading-edge, technically-robust, cost-effective and culturally-acceptable. An innovative “no sludge” solution was adopted that has resulted in a paradigm shift in wastewater planning and treatment in New Zealan...