Activated Sludge Effluent Articles & Analysis
30 articles found
Location: Polymer Manufacturer, Texas Background: A water-soluble polymer manufacturer was having difficulty with an activated sludge treatment system that failed to meet permit limits. The treatment system was designed with an initial flocculation phase, whereby the pH was adjusted to 12 or above, followed by an anaerobic treatment phase, which discharged to a typical aerobic activated sludge ...
“Knowing the instantaneous final effluent quality, we can immediately take corrective process measures to improve process performance and final effluent ...
Ion exchange: In this chemical process, unwanted dissolved ions in water, such as nitrates from fertilizer, are exchanged for similarly charged ions as they pass over a bed of resin beads. Biological denitrification (activated sludge) process: Microbes do most of the work in biological denitrification. ...
Ion exchange: In this chemical process, unwanted dissolved ions in water, such as nitrates from fertilizer, are exchanged for similarly charged ions as they pass over a bed of resin beads. Biological denitrification (activated sludge) process: Microbes do most of the work in biological denitrification. ...
The membrane fouling, with respect to flux reduction, was lower in FO than in RO when testing an activated sludge effluent. Cross-flow velocity, air-scouring, osmotic backwashing and effect of a spacer were compared to determine the most effective cleaning method for FO. After a long period of fouling with activated ...
We must have into account that the activated sludge of a treatment plant is an alive process, with its own breathing; therefore, a lack of information on this aspect can cause to serious confusions in the following-up and control of the activated sludge process having serious repercussion in the effluent quality ...
This study evaluated the hydroxyl radical scavenging characteristics of wastewater from five membrane bioreactor (MBR) and five activated sludge (AS) systems. The average values of the characteristics of both wastewater types was found to be significantly different at a 90% confidence interval in terms UV absorbance at 254 nm, alkalinity, and biopolymer ...
This study focused on NDMA formation potential (NDMAFP) removal in wastewater treated effluent by UV/H2O2 technology. A UV/H2O2 system was tested for the removal performance on both organic precursors and NDMAFP. ...
The contamination of major continental‐river systems by endocrine‐active chemicals (EACs) derived from the discharge of wastewater treatment plant (WWTP) effluents can impact human and ecosystem health. As part of a long‐term effort to develop a native fish model organism for assessment of endocrine disruption in Australia's largest watershed, the ...
The present study compares conventional wastewater treatment technologies (coagulation–flocculation and activated sludge) and powdered activated carbon (PAC) treatment for the removal of acute ecotoxicity from wastewater generated by tank truck cleaning (TTC) processes. ...
This work evaluated the use of different external carbon sources to promote the via-nitrite nutrient removal from anaerobic effluents. The carbon sources consisted of fermentation liquid produced from the organic fraction of municipal solid waste (OFMSW FL), drainage liquid produced from OFMSW, fermentation liquid produced from vegetable and fruit waste (VFW FL) and acetic ...
As microbiological parameters are important in monitoring the correct operation of wastewater treatment plants and controlling the microbiological quality of wastewater, the abundances of total bacteria (including intact and damaged bacterial cells) and total viruses in wastewater were investigated using a combination of ultrasonication and flow cytometry. The comparisons between flow cytometry ...
Activated sludge flocs that are carried to the final effluent can significantly decrease the effectiveness of ultraviolet (UV) disinfection of wastewater. This effect is detected in a typical UV dose–response curve, where at higher UV doses there is a decrease in the inactivation rate (tailing). In this study, the effect of ...
A splitter at the end of the channel divides the flow into a clean effluent stream and a concentrate stream. The focusing of particles is primarily due to a combination of hydrodynamic forces (drag, virtual mass, and shear), which causes a size rather than density dependent separation. This enables separation of particles with densities identical or close to that of their ...
A tiered investigative approach was employed to characterize and identify substances responsible for the persistent toxicity of a municipal primary‐treated effluent to gametes of the Hawaiian sea urchin, Tripneustes gratilla. EPA Toxicity Identification Evaluation (TIE) procedures were modified to account for the tolerance of T.gratilla gametes to various sample manipulations. ...
The Waste Activated Sludge (WAS) discharged during the aerobic treatment of Palm Oil Mill Effluent (POME) was used to produce a low cost adsorbent for the removal of Methylene Blue (MB) from aqueous solution. ...
Low cost adsorbent was prepared using waste activated sludge (WAS) from a palm oil mill effluent (POME) treatment plant, and used to adsorb ammonium from aqueous solution. ...
Activated Sludge Process (ASP) was applied to effluent from factories in southern Thailand. ...
In this study, raw wastewater, activated sludge, and the resulting final effluents and biosolids in four municipal wastewater treatment plants (WWTPs A, B, C and D) were seasonally investigated for human-virulent water-borne pathogens Cryptosporidium parvum/hominis and Giardia duodenalis, and microsporidia (e.g. ...
Continuous developments and advances in membrane technology allow recovering to large extent reusable water from untraditional water sources, such as municipal effluents. In this paper, operational results and preliminary cost-analysis of a microfiltration (MF) process used for raw sewage and secondary effluent polishing are given. ...