Flocculation Removal of Microcystis Aeruginosa by Chitosan-Bentonite Compound Material

2011 ◽  
Vol 335-336 ◽  
pp. 1381-1384
Author(s):  
Bin Guo Zheng ◽  
Wei Gong Peng ◽  
Ji Biao Zhang ◽  
Zheng Zheng
Keyword(s):  
Water Quality ◽  
Drinking Water ◽  
Water Treatment ◽  
Adverse Effects ◽  
Microcystis Aeruginosa ◽  
Harmful Algal Blooms ◽  
Algal Blooms ◽  
Drinking Water Treatment ◽  
Treatment Processes ◽  
Compound Material

Harmful algal blooms have long been an issue worldwide owing to their adverse effects on drinking water treatment processes as well as drinking water quality. In this paper, chitosan-bentonite compound material was prepared by the supporting of chitosan on pillared bentonite and used for removal of harmful algae from water. The results showed that the compound material was effective for the removal of cyanobacterial Microcystis aeruginosa.

scholarly journals Natural organic matter removal by ion exchange at different positions in the drinking water treatment lane

2013 ◽  
Vol 6 (1) ◽  
pp. 1-10 ◽  
Author(s):  
A. Grefte ◽  
M. Dignum ◽  
E. R. Cornelissen ◽  
L. C. Rietveld
Keyword(s):  
Water Quality ◽  
Drinking Water ◽  
Organic Matter ◽  
Water Treatment ◽  
Organic Carbon ◽  
Natural Organic Matter ◽  
Drinking Water Treatment ◽  
Biological Stability ◽  
Sand Filtration ◽  
Slow Sand Filtration

Abstract. To guarantee a good water quality at the customers tap, natural organic matter (NOM) should be (partly) removed during drinking water treatment. The objective of this research was to improve the biological stability of the produced water by incorporating anion exchange (IEX) for NOM removal. Different placement positions of IEX in the treatment lane (IEX positioned before coagulation, before ozonation or after slow sand filtration) and two IEX configurations (MIEX® and fluidized IEX (FIX)) were compared on water quality as well as costs. For this purpose the pre-treatment plant at Loenderveen and production plant Weesperkarspel of Waternet were used as a case study. Both, MIEX® and FIX were able to remove NOM (mainly the HS fraction) to a high extent. NOM removal can be done efficiently before ozonation and after slow sand filtration. The biological stability, in terms of assimilable organic carbon, biofilm formation rate and dissolved organic carbon, was improved by incorporating IEX for NOM removal. The operational costs were assumed to be directly dependent of the NOM removal rate and determined the difference between the IEX positions. The total costs for IEX for the three positions were approximately equal (0.0631 € m−3), however the savings on following treatment processes caused a cost reduction for the IEX positions before coagulation and before ozonation compared to IEX positioned after slow sand filtration. IEX positioned before ozonation was most cost effective and improved the biological stability of the treated water.

scholarly journals Integration of target analyses, non-target screening and effect-based monitoring to assess OMP related water quality changes in drinking water treatment

2020 ◽  
Vol 705 ◽  
pp. 135779 ◽  
Author(s):  
Andrea M. Brunner ◽  
Cheryl Bertelkamp ◽  
Milou M.L. Dingemans ◽  
Annemieke Kolkman ◽  
Bas Wols ◽  
...  
Keyword(s):  
Water Quality ◽  
Drinking Water ◽  
Water Treatment ◽  
Drinking Water Treatment ◽  
Quality Changes ◽  
Target Screening

Understanding the impacts of sodium silicate on water quality and iron oxide particles

2019 ◽  
Vol 5 (8) ◽  
pp. 1360-1370 ◽  
Author(s):  
Bofu Li ◽  
Benjamin F. Trueman ◽  
Mohammad Shahedur Rahman ◽  
Yaohuan Gao ◽  
Yuri Park ◽  
...  
Keyword(s):  
Water Quality ◽  
Drinking Water ◽  
Iron Oxide ◽  
Water Treatment ◽  
Sodium Silicate ◽  
Bacterial Growth ◽  
Drinking Water Treatment ◽  
Iron Oxide Particles ◽  
Oxide Particles

Silicates represent an alternative drinking water treatment for colour and turbidity due to iron. They may avoid the drawbacks of polyphosphates: increased lead solubility, the potential for increased bacterial growth, and phosphorus in wastewater.

scholarly journals Small-scale drinking water treatment unit of filtration and UV disinfection for remote area

2020 ◽  
Vol 20 (6) ◽  
pp. 2106-2118
Author(s):  
Kassim Chabi ◽  
Jie Zeng ◽  
Lizheng Guo ◽  
Xi Li ◽  
Chengsong Ye ◽  
...  
Keyword(s):  
Water Quality ◽  
Drinking Water ◽  
Water Treatment ◽  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Bacterial Community Composition ◽  
Drinking Water Treatment ◽  
Small Scale ◽  
Treatment Unit ◽  
Remote Areas

Abstract People in remote areas are still drinking surface water that may contain certain pollutants including harmful microorganisms and chemical compounds directly without any pretreatment. In this study, we have designed and operated a pilot-scale drinking water treatment unit as part of our aim to find an economic and easily operable technology for providing drinking water to people in those areas. Our small-scale treatment unit contains filtration and disinfection (UV–C irradiation) stages to remove pollutants from source water. The water quality index was determined based on various parameters such as pH, temperature, dissolved oxygen, nitrate, nitrite, ammonium, phosphorus, dissolved organic carbon and bacteria. Water and media samples after DNA extraction were sequenced using Illumina MiSeq throughput sequencing for the determination of bacterial community composition. After the raw water treatment, the reduction of bacteria concentration ranged from 1 to 2 log10. The average removal of the turbidity, ammonium, nitrite, phosphorus and dissolved organic carbon reached up to 95.33%, 85.71%, 100%, 28.57%, and 45%, respectively. In conclusion, multiple biological stages in our designed unit showed an improvement of the drinking water quality. The designed drinking treatment unit produces potable water meeting standards at a lower cost of operation and it can be used in remote areas.

Is biological treatment a viable alternative for micropollutant removal in drinking water treatment processes?

2013 ◽  
Vol 47 (16) ◽  
pp. 5955-5976 ◽  
Author(s):  
Jessica Benner ◽  
Damian E. Helbling ◽  
Hans-Peter E. Kohler ◽  
Janneke Wittebol ◽  
Elena Kaiser ◽  
...  
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
Biological Treatment ◽  
Drinking Water Treatment ◽  
Viable Alternative ◽  
Treatment Processes ◽  
Micropollutant Removal
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