by Wastewater Technology Centre, Environmental Protection Service, Environment Canada in [Ottawa .
Includes bibliographical references.
|Statement||by Bruce E. Jank ; assisted by Paul H.M. Guo and Wayne K. Bedford.|
|Contributions||Bedford, Wayne K., Guo, P. H. M., Wastewater Technology Centre (Canada)|
|LC Classifications||TD899.W65 .J35 1976|
|The Physical Object|
|Pagination||29 p. :|
|Number of Pages||29|
Activated sludge (AS) plays a crucial role in the treatment of domestic and industrial wastewater. AS is a biocenosis of microorganisms capable of degrading various pollutants, including organic compounds, toxicants, and xenobiotics. We performed 16S Cited by: Activated Sludge Process Control and Troubleshooting Chart Methodology The following methodology was developed by the Ohio EPA Compliance Assistance Unit based on lessons learned from experienced operators and is intended to provide a streamlined approach to “diagnose” problems associated with the activated sludge process. These can not be removed by conventional primary and secondary treatment (Sun et al., ). In the present study the possible application of an activated sludge process to an existing pulping plant having a lagoon system for its effluent treatment, was by: 5. In identifying a problem, visual observation of the treatment process is essential and settle-ability tests are vital. Settling-test observations lead to appropriate remedies and corrective measures. Clues that there may be a problem include a cloudy effluent, pin floc or stragglers in effluent, ash on clarifier surface or floating solids after.
microbial culture (activated sludge) that treats wastewater and which can be managed. One definition of a wastewater treatment plant operator is a "bug farmer", one who controls the aeration basin environment to favor good microbiology. This paper will discuss the types of microbiological problems that can occur in activated sludge operation. operational adjustments can be directed to the specific treatment unit of the activated sludge system causing the problem. Making adjustments to one unit of the treatment system when the issue is located in another unit is a common mistake in troubleshooting the activated sludge process. In the aeration basin, the effluent is treated with a culture of microorganisms (the activated sludge), which is present in a high concentration. Figure 7 shows a diagram of a pulp mill treatment with the activated sludge system. Activated sludge plants at kraft pulp mills have a retention time of about 15–48 h. Effluent and sludge Effluent was collected after primary treatment at a bleached eucalypt kraft pulp mill. Sludge was collected from the sludge recycle line of the activated sludge treatment plant at the same mill. Effluent and sludge samples were transported to the Federal University of Viçosa Sanitary and Environmental Engineering.
Criterion for selecting sludge treatment and final disposal alternatives Sludge management at the treatment plant 8 Land application of sewage sludge C.V. Andreoli, E.S. Pegorini, F. Fernandes, H.F. dos Santos Introduction Beneﬁcial use Requirements and associated risks Handling and management •A bulking sludge settles slowly, and has an SVI > •Many sludge thickening and dewatering problems are actually problems due to a bulking sludge •Filaments can cause bulking due to interfloc bridging, or open floc structure. wastewater treatment, effluent is to a on how well the activated sludge can treated water. settling spontaneously flocs of activated sludge. This process is associated with problems such as formation of flocs with poor settling properties and floating sludge which can cause loss of sludge from into the effluent. In relation to effluent toxicity, the 48 h LC 50 test using Daphnia showed that the effluent was toxic before but not after activated sludge treatment with HRT varying between 12 and 6 h (Table 6).