Emergency Treatment Measures for Sudden Pollution Incidents in Source Water with some Contaminants: A Review

2013 ◽  
Vol 781-784 ◽  
pp. 1950-1953 ◽  
Author(s):  
Hong Tao Wang ◽  
Xue Bin Jia ◽  
Dong Mei Liu ◽  
Zhi Wei Wang ◽  
Yun Hao Pan
Keyword(s):  
Organic Matter ◽  
Water Treatment ◽  
Water Purification ◽  
Seasonal Variability ◽  
Emergency Treatment ◽  
Treatment Process ◽  
Source Water ◽  
High Concentration ◽  
Water Treatment Process ◽  
Treatment Measures

Source water polluted by algae, ammonium and organic matter has been studied for many years. Sudden pollution incidents of source water have been reported across the whole country. Seasonal variability of rainfall across China has resulted in floods or droughts, thus incurred the high concentration of algae, ammonium and organic matter, causing severe challenges to the conventional water purification facilities. However, the conventional water treatment process is often unavailable to keep the safety of source water for drinking when sudden pollution occurs. Meanwhile, byproducts are often to be found over the whole treatment process, it is high time that researchers took effective measures to deal with this problem. In the present work, an overview of the recent research dealing with source water suddenly polluted by algae, ammonium and organic matter is presented.

Study on Phosphorus and Bacterial Regrowth in Drinking Water

2012 ◽  
Vol 461 ◽  
pp. 466-469
Author(s):  
Deng Ling Jiang ◽  
Yu Min Zhang ◽  
Ning Zheng
Keyword(s):  
Water Treatment ◽  
Distribution System ◽  
Water Distribution ◽  
Treatment Process ◽  
Water Distribution System ◽  
Phosphorus Concentration ◽  
Available Phosphorus ◽  
Source Water ◽  
Bacterial Regrowth ◽  
Water Treatment Process

Phosphorus limitation on bacterial regrowth was studied in source water, water treatment process and water distribution system of J Water Supply Plant in T city, by modified AOC method and MAP analysis. Based on the study, the follows can be concluded: ① MAP(Microbially Available Phosphorus) concentration was higher in source water and water treatment process, which was 5～38µg PO43－-P/L. However in water distribution, MAP concentration was lower, which was less than 5µg PO43--P/L. ②Coagulation and sedimentation can remove MAP efficiently. 31%～68% of MAP can be removed in these process. ③ In source water and water treatment process, there was no evident difference between AOCpotential, AOCp and AOCnative. So assimilable organic carbon (AOC) was the most important factor of bacterial regrowth. In water distribution system, the concentration of AOCpotential and AOCp were 2～8.7 times of the concentration of AOCnative. So phosphorus limited bacterial regrowth.

The effect of nitrate and organic matter upon mobility of selenium in groundwater and in a water treatment process

1990 ◽  
Vol 49 (3-4) ◽  
pp. 251-272 ◽  
Author(s):  
Oleh Weres ◽  
Harry R. Bowman ◽  
Aaron Goldstein ◽  
Emily C. Smith ◽  
Leon Tsao ◽  
...  
Keyword(s):  
Organic Matter ◽  
Water Treatment ◽  
Treatment Process ◽  
Water Treatment Process

Natural Organic Matter (NOM) Transformations and their Effects on Water Treatment Process: A Contemporary Review

2021 ◽  
Vol 15 ◽  
Author(s):  
Manoj Kumar Karnena ◽  
Madhavi Konni ◽  
Bhavya Kavitha Dwarapureddi ◽  
Vara Saritha
Keyword(s):  
Organic Matter ◽  
Water Treatment ◽  
Natural Organic Matter ◽  
Membrane Filtration ◽  
Treatment Process ◽  
Climatic Conditions ◽  
Water And Wastewater Treatment ◽  
Water Treatment Process ◽  
Treatment Facilities ◽  
Water And Wastewater

Abstract: One of the several significant concerns related to water treatment plants is the transformation of natural organic matter (NOM) concerning quality and quantity due to the changing climatic conditions. The NOM consists of heterogeneous functionalized groups. Phenolic and carboxyl groups are the dominant groups that are pH-dependent and show a stronger affinity towards the metals. Properties of natural organic matter and trace elements govern the binding kinetics, influencing cations' binding to functionalized groups at lower pH. The water treatment process mechanisms like adsorption, coagulation, membrane filtration, and ion exchange efficiencies are sturdily influenced by the presence of NOM with cations and by the natural organic matter alone. The complexation among the natural organic matter and coagulants enhances the removal of NOM from the coagulation processes. The current review illustrates detailed interactions between natural organic matter and the potential impacts of cations on NOM in the water and wastewater treatment facilities.

scholarly journals Assessment of waterborne protozoan passage through conventional drinking water treatment process in Venezuela

2012 ◽  
Vol 10 (2) ◽  
pp. 324-336 ◽  
Author(s):  
Walter Q. Betancourt ◽  
Kristina D. Mena
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
Water Samples ◽  
Environmental Protection Agency ◽  
Treatment Process ◽  
Drinking Water Treatment ◽  
Source Water ◽  
Raw Water ◽  
Water Treatment Process ◽  
Monitoring Strategies

Three drinking water treatment plants (DWTPs) differing in source water and treatment capacity were investigated for the potential passage of waterborne protozoan (oo)cysts through conventional processing. DWTP I (15,000 L/s), DWTP II (7,500 L/s) and DWTP III (4,300 L/s) provide drinking water for approximately 2.7 million inhabitants of the Metropolitan District of Caracas (Venezuela). The US Environmental Protection Agency Method 1623 for detection of Cryptosporidium and Giardia was used to analyze raw water and finished drinking water samples collected from the three plants. (Oo)cyst recovery efficiencies varied between 23 and 84%. The concentration of confirmed (oo)cysts detected in raw water samples ranged between 1 and 100 per 100 L. (Oo)cyst levels in finished water samples ranged from 2 to 25 per 100 L. These data indicated that the conventional treatment process to produce finished water at two filtration plants was not effective in preventing the passage of protozoan (oo)cysts. Monitoring strategies that include multiple microbial indicators and waterborne pathogens are strongly recommended for accurate source water characterization and for verification of the effectiveness of treatment process barriers to microbial breakthrough in the finished water.

Studies on Micro-Polluted Source Water Treatment by Ozone Combined Processes

2011 ◽  
Vol 281 ◽  
pp. 40-44 ◽  
Author(s):  
Jian Kun Zhang
Keyword(s):  
Water Treatment ◽  
Treatment Process ◽  
Quality Characteristics ◽  
Combined Processes ◽  
Source Water ◽  
Combined Process ◽  
Water Treatment Process ◽  
Treatment Processes ◽  
Removal Efficiencies ◽  
Better Than

According to the water quality characteristics, micro-polluted source water treatment by ozone combined processes. The results show that the average removal efficiencies of algae, CODMn, NH4+-N, turbidity, chromaticity by bio-pretreatment filter are 72.0%, 14.5%, 80.5%, 58.6% ,26.0%, respectively; while the whole average removal efficiencies by pre-ozonation tank following bio-pretreatment filter had increased at the different dosages of ozone, such as algae 12.0%, CODMn 19.5% ,NH4+-N 7.5%, turbidity 10.9%, chromaticity 34.5%, respectively; and the optimal dosages of ozone are between 0.7 and 1.5mg/L. Furthermore, compared with the conventional water treatment process, all kinds of combined water treatment processes are better than the conventional one, of which the combined process Ⅲ with granular activated carbon (GAC) adsorption tank is obviously the best, all the average removal efficiencies of algae, CODMn, NH4+-N, turbidity, chromaticity can reach 82%, while whose operation expenditure is higher than any others, so it should be considered comprehensively in the practice.

scholarly journals Complexation of Antimony with Natural Organic Matter: Performance Evaluation during Coagulation-Flocculation Process

2019 ◽  
Vol 16 (7) ◽  
pp. 1092 ◽  
Author(s):  
Muhammad Inam ◽  
Rizwan Khan ◽  
Du Park ◽  
Sarfaraz Khan ◽  
Ahmed Uddin ◽  
...  
Keyword(s):  
Organic Matter ◽  
Natural Organic Matter ◽  
Treatment Process ◽  
High Concentration ◽  
Isotherm Study ◽  
Toc Removal ◽  
Water Treatment Process ◽  
Flocculation Process ◽  
Hydrophobic Ligand ◽  
Complexation Ability

The presence of natural organic matter (NOM) in drinking water sources can stabilize toxic antimony (Sb) species, thus enhancing their mobility and causing adverse effects on human health. Therefore, the present study aims to quantitatively explore the complexation of hydrophobic/hydrophilic NOM, i.e., humic acid (HA), salicylic acid (SA), and L-cysteine (L-cys), with Sb in water. In addition, the removal of Sb(III, V) species and total organic carbon (TOC) was evaluated with ferric chloride (FC) as a coagulant. The results showed a stronger binding affinity of hydrophobic HA as compared to hydrophilic NOM. The optimum FC dose required for Sb(V) removal was found to be higher than that for Sb(III), due to the higher complexation ability of hydrophobic NOM with antimonate than antimonite. TOC removal was found to be higher in hydrophobic ligands than hydrophilic ligands. The high concentration of hydrophobic molecules significantly suppresses the Sb adsorption onto Fe precipitates. An isotherm study suggested a stronger adsorption capacity for the hydrophobic ligand than the hydrophilic ligand. The binding of Sb to NOM in the presence of active Fe sites was significantly reduced, likely due to the adsorption of contaminants onto precipitated Fe. The results of flocs characteristics revealed that mechanisms such as oxidation, complexation, charge neutralization, and adsorption may be involved in the removal of Sb species from water. This study may provide new insights into the complexation behavior of Sb in NOM-laden water as well as the optimization of the coagulant dose during the water treatment process.

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