Journal ArticleDOI
Evaluation of presence of THM in chlorinated wastewater and selected removal techniques
K.M. Qaisi,A.M. Qasem +1 more
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In this paper, the authors investigated the presence of THM's in wastewater in and from various types of treatment plants and evaluated the efficiency of selected techniques for THM removal, such as Activated Sludge, Trickling Filters, and Rotating Biological Contactors.Abstract:
This paper investigates the presence of THM's in wastewater in and from various types of treatment plants and evaluates the efficiency of selected techniques for THM removal. Activated Sludge, Trickling Filters, and Rotating Biological Contactors, are the main processes in the two treatment plant systems that are considered for the purpose of this study. Samples of wastewater were collected from various points such as before chlorination, and after chlorination and in the effluent channel and analyzed for THM's using Gas Chromatography. The results have shown that chlorination process contributes significantly to THM formation. Chloroform removal efficiency were excellent by air stripping using either mechanical or diffused aeration (98%) and by using Activated Carbon as adsorber, which has achieved similar efficiency.read more
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Journal ArticleDOI
An integrated approach to analyse biofilms of a full scale wastewater treatment plant
TL;DR: Relationship between ciliate species and physical-chemical profile of the system by cluster analysis indicated that the species Acineria uncinata, Amphileptus punctatus, Cinetochilum margaritaceum and Holosticha mancoidea were associated with the best RBC performance.
Journal ArticleDOI
Modeling volatilization and adsorption of disinfection byproducts in natural watersheds
TL;DR: Volatilization mechanism was preferred in the stream-type watershed and effective in reducing THMs, but unlikely to reduce HAAs, and adsorption of DBPs on aquifer soil does not reduce DBPs directly; nonetheless, it reduces the mobility ofDBPs in the aquifer and provides a place for other mechanisms to degrade/transform DBPs.
Journal ArticleDOI
Simultaneous formation and biodegradation of HAAs in slow sand filters: Effects of residual chlorine in filter influent
TL;DR: In this paper, the formation, speciation, and aerobic biodegradation of HAAs under different influent chlorine doses in batch reactor and simulated slow sand filtration (SSF) columns were explored.
References
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Journal ArticleDOI
Chlorinated hydrocarbons and the environment.
Journal ArticleDOI
THM and TOX Formation: Routes, Rates, and Precursors
TL;DR: Interaction des desinfectants and des composes organiques naturellement presents: reaction d'oxydation and de substitution as mentioned in this paper, and reaction de substitution and de oxydation.
Journal ArticleDOI
Curbing THMs in Small Water Systems
TL;DR: In this article, les stations d'epuration de petite taille qui est decrit ici (e.g., trihalogeno) are specialised for petite tailsle.
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