Activated sludge process – Upgrade with IFAS
After explaining how the activated sludge process works in part 1 we are now taking a closer look on how to increase the wastewater treatment capacity of ASP with IFAS systems. IFAS stands for integrated fixed film activated sludge and describes the combination of fill media attached growth systems with the activated sludge process. The […]
Activated sludge process and IFAS – Design rules + guideline
Activated sludge is worldwide the most used suspended growth process in wastewater treatment. The treatment process can include different steps, but most commonly are: Screening and grit removal to filter out debris Primary clarifier for particle sedimentation Biological treatment with activated sludge consisting of an aeration basin, secondary clarifier and recycle stream Disinfection for […]
Trickling filter process – Advantages in comparison to activated sludge
Trickling filters, also known as bio filters, are normally a fixed-bed, biological reactor operating in aerobic conditions. In the filter, microorganisms are attached to the inter packing material which was composed of rocks or gravel in the past and is nowadays a wide range of plastic fill media. Fill media support is placed on the […]
MBR, MBBR and FBBR – Comparison of wastewater treatment technologies (PART 2)
The comparison of the three systems show different advantages and disadvantages for industrial wastewater applications: 1. Effluent water quality: MBRs show in general a slightly better BOD removal than MBBRs or FBBRs. Very fine membranes can even hold back germs so that the water effluent quality is in general better. 2. Resistance to influent peaks […]
Drinking water from surface water
With decreasing groundwater reservoirs, alternative resources for drinking water become more and more important. Already today a tremendous amount of our tap water comes from surface water resources such as rivers and lakes. Before surface water reaches our taps it undergoes various process steps. Drinking water pretreatment includes coagulation and flocculation before particles are settled […]
Beneficial Biofilm Bacteria in waste water treatment
Most people relate Biofilm bacteria as something nasty and harmful. This is understandable as we normally come across Biofilm bacteria attached to shower heads, pipes, kitchen sinks or chillers at home or public places. Here Biofilm bacteria can cause corrosion, fouling or even lead to legionella growth. In the last few years public media discovered […]