Improved Performance of Drinking Water Microfiltration with Hybrid Particle Pre-treatment

2013 ◽  
pp. 93-99
Author(s):  
T. Carroll ◽  
N. Booker
Keyword(s):  
Drinking Water ◽  
Hybrid Particle ◽  
Improved Performance ◽  
Pre Treatment

Improving the biological stability of drinking water by ion exchange

2011 ◽  
Vol 11 (1) ◽  
pp. 107-112 ◽  
Author(s):  
A. Grefte ◽  
M. Dignum ◽  
S. A. Baghoth ◽  
E. R. Cornelissen ◽  
L. C. Rietveld
Keyword(s):  
Drinking Water ◽  
Organic Carbon ◽  
Ion Exchange ◽  
Biofilm Formation ◽  
Formation Rate ◽  
Treatment Plant ◽  
Drinking Water Treatment ◽  
Biological Stability ◽  
Biological Activated Carbon ◽  
Pre Treatment

To guarantee a good water quality at the consumer’s tap, natural organic matter (NOM) should be (partly) removed during drinking water treatment. The objective of this research is to measure the effect of NOM removal by ion exchange on the biological stability of drinking water. Experiments were performed in two lanes of the pilot plant of Weesperkarspel in the Netherlands. The lanes consisted of ozonation, softening, biological activated carbon filtration and slow sand filtration. Ion exchange in fluidized form was used as pre-treatment in one lane and removed 50% of the dissolved organic carbon (DOC); the other lane was used as reference. Compared to the reference lane, the assimilable organic carbon (AOC) concentration of the finished water in the lane pretreated by ion exchange was 61% lower. The biofilm formation rate of the finished water was decreased with 70% to 2.0 pg ATP/cm2.day. The achieved concentration of AOC and the values of the biofilm formation rate with ion exchange pre-treatment showed that the biological stability of drinking water can be improved by extending a treatment plant with ion exchange, especially when ozonation is involved as disinfection and oxidation step.

Microbial Desalination Cells for Low Energy Drinking Water

2021 ◽  
Author(s):  
Juan Arévalo ◽  
Juan Manuel Ortiz ◽  
Eduard Borràs-Camps ◽  
Victor Monsalvo-Garcia ◽  
Maria D. Kennedy ◽  
...  
Keyword(s):  
Drinking Water ◽  
Wastewater Treatment ◽  
Sea Water ◽  
Electrical Energy ◽  
Energy System ◽  
Electrochemical Reactor ◽  
Treated Wastewater ◽  
External Energy ◽  
Design And Optimization ◽  
Pre Treatment

The world's largest demonstrator of a revolutionary energy system in desalination for drinking water production is in operation. MIDES uses Microbial Desalination Cells (MDC) in a pre-treatment step for reverse osmosis (RO), for simultaneous saline stream desalination and wastewater treatment. MDCs are based on bio-electro-chemical technology, in which biological wastewater treatment can be coupled to the desalination of a saline stream using ion exchange membranes without external energy input. MDCs simultaneously treat wastewater and perform desalination using the energy contained in the wastewater. In fact, an MDC can produce around 1.8 kWh of bioelectricity from the energy contained in 1 m3 of wastewater. Compared to traditional RO, more than 3 kWh/m3 of electrical energy is saved. With this novel technology, two low-quality water streams (saline stream, wastewater) are transformed into two high-quality streams (desalinated water, treated wastewater) suitable for further uses. An exhaustive scaling-up process was carried out in which all MIDES partners worked together on nanostructured electrodes, antifouling membranes, electrochemical reactor design and optimization, life cycle assessment, microbial electrochemistry and physiology expertise, and process engineering and control. The roadmap of the lab-MDC upscaling goes through the assembly of a pre-pilot MDC, towards the development of the demonstrator of the MDC technology (patented). Nominal desalination rate between 4-11 Lm-2h-1 is reached with a current efficiency of 40 %. After the scalability success, two MDC pilot plants were designed and constructed consisting of one stack of 15 MDC pilot units with a 0.4 m2 electrode area per unit. This book presents the information generated throughout the EU funded MIDES project and includes the latest developments related to desalination of sea water and brackish water by applying microbial desalination cells. ISBN: 9781789062113 (Paperback) ISBN: 9781789062120 (eBook)

scholarly journals Application of aerated submerged spongebed biofilter for raw water pre-treatment in drinking water installation

2019 ◽  
Vol 270 ◽  
pp. 04008
Author(s):  
Margareta Novia Asih Christami ◽  
Setyo Sarwanto Moersidik ◽  
El Khobar M Nazech ◽  
Yenny Silvia
Keyword(s):  
Drinking Water ◽  
Government Regulation ◽  
Organic Pollutant ◽  
Treatment Plant ◽  
Drinking Water Treatment ◽  
Treatment Recommendation ◽  
Raw Water ◽  
Total Phosphate ◽  
Drinking Water Standard ◽  
Pre Treatment

Pesanggrahan River has been contaminated by domestic wastewater. High contamination of Pesanggrahan River with the maximum observed TSS (243,8 mg/L), COD (165,2 mg/L), Total Phosphate (0,74 mg/L), and NH3-N (1,04 mg/L) has exceeded the Raw Water for Drinking Water standard based on Government Regulation Number 82 the Year 2001. Aerated Submerged Sponge-bed Biofilter can be proposed as pre-treatment recommendation for Drinking Water Treatment Plant processing due to its environment-friendly property and ability to reduce the organic pollutant. A lab-scale experiment with the modified volume of 15% media was applied in a 6L reactor with 7 L/min oxygen supply. Retention time variation was evaluated at 1, 1,5, and 2 hours. It was found that the highest removal efficiency occurred at HRT 1,5 hours with the reduction capability of 75,5±0,12% TSS; 59,1±0,14% COD; 57,1±0,27% Total Phosphate; and 45,5±0,37% NH3-N. On the same HRT (1,5 hours), ammonia reduction obtained at k(0-order)= 0,005 g/m2day. This biofilter also decreased the optimum coagulant (PAC) concentration needed.

Biological pre-treatment system for ammonia removal from slightly contaminated river used as a drinking water source

2021 ◽  
Vol 147 ◽  
pp. 385-391
Author(s):  
Yi-Ju Wu ◽  
Yi-Wen Liu ◽  
Hai-Hsuan Cheng ◽  
Chih-Wen Ke ◽  
Tsair-Fuh Lin ◽  
...  
Keyword(s):  
Drinking Water ◽  
Water Source ◽  
Ammonia Removal ◽  
Treatment System ◽  
Drinking Water Source ◽  
Pre Treatment

scholarly journals A Physical Pre-Treatment Method (Vertical Weir Curtain) for Mitigating Cyanobacteria and Some of Their Metabolites in a Drinking Water Reservoir

Water ◽  
2017 ◽  
Vol 9 (10) ◽  
pp. 775 ◽  
Author(s):  
Chae-Hong Park ◽  
Myung-Hwan Park ◽  
Keun-Hee Kim ◽  
Nan-Young Kim ◽  
Young-Hyo Kim ◽  
...  
Keyword(s):  
Drinking Water ◽  
Water Reservoir ◽  
Treatment Method ◽  
Drinking Water Reservoir ◽  
Pre Treatment

Use of volcanic ash and its impact on algae proliferation in drinking water filtration

2013 ◽  
Vol 3 (2) ◽  
pp. 199-206
Author(s):  
Kalibbala Herbert Mpagi ◽  
Kaggwa Rose ◽  
Plaza Elzbieta
Keyword(s):  
Drinking Water ◽  
Volcanic Ash ◽  
Developed Countries ◽  
Intact Cells ◽  
Treatment Processes ◽  
Filtration System ◽  
Sustainable Water Supply ◽  
Water Supply And Treatment ◽  
Pre Treatment ◽  
Developing And Developed Countries

With increasing pollution of the available water resources, development of safe drinking water supplies is increasingly becoming a challenge, both for developing and developed countries. To alleviate the prevailing difficulties, approaches should focus on sustainable water supply and treatment systems that require minimal maintenance and operator skills. In this study, a pre-treatment of water containing algae using a combination of volcanic ash (VA) and sand in a filtration system was assessed. The results indicated that a combination of VA and sand performed better in the removal of algae than sand alone. However, it was noted that different algae genera were removed at different rates within the two types of media arrangement. In addition, there was an increase in the filtration run length of the ash-sand columns with VA on top of sand of about two and half times compared with the sand columns. It is therefore anticipated that pre-treatment of raw water laden with algae using ash-sand would probably improve on the performance of the subsequent conventional processes in removing intact cells of algae and thus reduce the threat of releasing toxins into the water that may not be removed by the subsequent conventional treatment processes.

Effects of ion exchange resin pre-treatment on GAC adsorption

2008 ◽  
Vol 8 (2) ◽  
pp. 181-187
Author(s):  
B. Sani ◽  
L. Rossi ◽  
C. Lubello ◽  
S. Zacchei
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
Ion Exchange ◽  
Drinking Water Treatment ◽  
Life Time ◽  
Ion Exchange Resins ◽  
Dissolved Organics ◽  
Pre Treatment ◽  
Exchange Resins ◽  
By Products

In Italian drinking water treatment plants (DWTP), the problem of chlorination by-products control is very important as the Italian drinking water regulations (Dlgs. 31/2001, as enactment of the CEU directive 98/83) set very strict limits for these compounds. A possible strategy for controlling the concentrations of DBPs (disinfection by-products) is the application of treatment processes able to reduce the concentration of dissolved organic matter, the main precursor of DBPs, before the dosage of chlorine-based disinfectants. Recently, ion exchange resins for the removal of dissolved organics have shown several applications in drinking water treatment. In this experimental study, the treatment with ion exchange resins MIEX®DOC and the treatment with GAC (granular activated carbon) were evaluated for the removal of dissolved organics. Moreover, the effects of MIEX® pre-treatment on the subsequent GAC filtration phase were evaluated, with particular attention to the effects on the life-time of the GAC filter. The GAC filter operation was simulated by rapid small scale column tests (RSSCT), which allow the evaluation of the GAC breakthrough curve in a shorter time with respect to a full plant and pilot plant trials. On the basis of the experimental results, the ion exchange process was very efficient in dissolved organics removal (60–70% UV254 removal). Moreover, the results indicated that the application of ion exchange resins as pre-treatment in a conventional drinking water treatment train could increase the filter life-time in the subsequent GAC adsorption phase (about 200%) resulting in potentially important cost benefits for the overall treatment process.

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