Evaluation of a Groundwater Arsenic Treatment Process in Response to Organic Matter Inclusion in Feed Water

2010 ◽  
Vol 5 (3) ◽  
Author(s):  
K. M. Hassan ◽  
K. Fukushi ◽  
F. Nakajima ◽  
K. Yamamoto
Keyword(s):  
Drinking Water ◽  
Organic Matter ◽  
Removal Efficiency ◽  
Treatment Process ◽  
Arsenic Removal ◽  
Feed Water ◽  
High Concentration ◽  
Treatment Unit ◽  
Simple Modification ◽  
Groundwater Arsenic

The contamination of groundwater by sediment-derived arsenic threatens the health of millions of people worldwide and a large number of drinking water treatment units have been employed to prevent this toxicity. This study aims at evaluating the influence of organic matter on groundwater arsenic treatment practice and proposing the modifications related to this issue. The arsenic removal efficiency was found to be decreased even in the presence of a low concentration of organic matter, 5 mg/L as TOC (total organic carbon), and gradually deteriorated with higher concentrations. Nevertheless, a high concentration of bioleached arsenic, above 130 μg/L, was noticed in the inoperative condition of the treatment unit. A simple modification in the treatment process, using an additional iron-matrix layer, substantially increased, 12% more, the arsenic removal efficiency even in the presence of high concentration of organic matter. Strategies were proposed to combat the bioleaching of arsenic in the treatment process. This study revealed that organic matter would significantly impede the arsenic removal process for drinking water and hence safe remediation strategies were imperative.

scholarly journals PENINGKATAN KUALITAS AIR BAKU DENGAN PROSES BIOFILTER TERCELUP MENGGUNAKAN MEDIA STRUKTUR SARANG TAWON

2018 ◽  
Vol 7 (1) ◽  
Author(s):  
Nusa Idaman Said ◽  
Arie Herlambang
Keyword(s):  
Drinking Water ◽  
Organic Matter ◽  
Water Treatment ◽  
River Water ◽  
Residence Time ◽  
Drinking Water Treatment ◽  
Organic Substances ◽  
Raw Water ◽  
Treatment Unit ◽  
High Organic Matter

Contamination of rivers has reached an alarming level, especially in the rivers passing through major cities, agricultural areas and industrial areas. Among the contaminants that often appear dominant and very disturbing is the organic substance. The existence of high organic matter within the river water is often expressed in permanganate number that has passed the quality standard. River that contain high organic matter usually the water smell and the color is black, besides it can also cause disturbances in the water treatment process, which is an increasing use of coagulants, chlorine, activated carbon, and the emergence of substances that are not desired, and the quality of treatment results are unsatisfactory. Many ways to reduce the organic matter in river water, one of them is by using the biofilter honeycomb structure. The target of the reduction of organic substances is that the river water could be used as a raw drinking water quality standards or meet the category B, Regulation of Jakarta Governor Number 582, 1995. Raw water used for this study were taken from Krukut River which is the raw water for Regional Water Company PALYJA, Production Installation III Cilandak, South Jakarta and Cengkareng Drain river water, which is currently used as a source of raw water for PAM Taman Kota, West Jakarta using a biofilter reactor aerobic system, the capacity of 50 - 200 m3, Capasity of Blowers 300 l /min, Residence Time 6 hours up to 1 hour. Test results on the residence time of 1 hour, parameters pH, TSS, turbidity, organic substances, detergents, manganese, ammonia, nitrite, nitrate, can meet the standard, except for iron which still exceeds the standard. To improve the removal  efficiency of organic matter and iron, at the beginning of processing before entering into the drinking water treatment unit need to be added powder active carbon and an oxidizing agent with a sufficient dose. Keywords: Organic substances, biofilter, aerobic, honeycomb plastic media.

Drinking Water Supply Options in Arsenic and Salinity Affected Areas of Bangladesh: A Case Study

2021 ◽  
Vol 12 (1-2) ◽  
pp. 215-223
Author(s):  
MA Rahman ◽  
MA Ali ◽  
T Ahmed ◽  
ME Habib ◽  
MS Hossain
Keyword(s):  
Drinking Water ◽  
Water Supply ◽  
Rainwater Harvesting ◽  
Service Providers ◽  
Iron Chloride ◽  
Drinking Water Supply ◽  
Aquifer Recharge ◽  
High Concentration ◽  
Groundwater Arsenic ◽  
Harvesting Systems

Widespread groundwater arsenic contamination in south, south-western and north-eastern regions and high salinity in the south-western coastal region are the two major challenges for drinking water supply in Bangladesh. In this study, we assessed various water supply technologies used for mitigating arsenic and salinity in Laksam of Cumilla and Assasuni of Satkhira district. Water samples were analyzed for Arsenic, Iron, Chloride (indicator for salinity) and FC from different water extraction systems (shallow, deep and Tara tubewells), groundwater arsenic treatment units (SIDKO and READ-F), rainwater harvesting systems (RWH), pond sand filters (PSF), and managed aquifer recharge units. Most shallow tubewells, both in Laksam and Assasuni, have been found to produce arsenic contaminated water. But water from deep and Tara tubewells have been found arsenic-free, though high concentration of iron was observed in the wells in Laksam. Rainwater harvesting systems, PSF and MAR units in Assasuni have been found to provide water free from the common chemical contaminants but suffer from high bacterial contamination. Deep tubewell appear to be the most preferred option where a suitable aquifer is available. The community-scale groundwater treatment systems would require strong operation and maintenance support from the service providers to be successful. Environ. Sci. & Natural Resources, 12(1&2): 215-223, 2019

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.

Continuous desalination with a metal-free redox-mediator

2019 ◽  
Vol 7 (23) ◽  
pp. 13941-13947 ◽  
Author(s):  
Jian Wang ◽  
Qi Zhang ◽  
Fuming Chen ◽  
Xianhua Hou ◽  
Zhilie Tang ◽  
...  
Keyword(s):  
Drinking Water ◽  
Water Level ◽  
Removal Efficiency ◽  
Redox Mediator ◽  
High Concentration ◽  
Metal Free ◽  
Batch Treatment ◽  
Single Batch

Metal-free molecular redox-mediated electro-dialytic desalination has been presented, which can directly desalt high concentration of feed (5860 ppm) to the drinking water level (136 ppm) during a continuous single batch treatment. The removal efficiency is up to 97.7%.

Phosphorus in Drinking Water and it's Removal in Conventional Treatment Process

2012 ◽  
Vol 461 ◽  
pp. 453-456 ◽  
Author(s):  
Deng Ling Jiang ◽  
Yan Hua Chen ◽  
Guo Wei Ni
Keyword(s):  
Drinking Water ◽  
Removal Efficiency ◽  
Conventional Treatment ◽  
Treatment Process ◽  
Particulate Phosphorus ◽  
Available Phosphorus ◽  
Water Removal ◽  
Soluble Phosphate ◽  
Source Water ◽  
Treated Drinking Water

Chemical forms of phosphorus in source and treated drinking water were studied in this paper. Removal of total phosphorus (TP) and microbially available phosphorus (MAP) by conventional treatment process of drinking water was examined. The results showed that particulate phosphorus constituted of most TP in source water. Content of total soluble phosphate (TSP) was about 30% of TP. Soluble reactive phosphate (SRP) can be measured in a few months during a year and its content was very low. Content of MAP was higher than content of TSP in source water, which showed that microbe can also use particle phosphorus. Ratio of TSP to TP increased evidently in treated water. This demonstrated that removal of TSP was more difficult than particulate phosphorus in conventional treatment process for drinking water. Removal of TP and MAP in conventional treatment process of drinking water was effective, with averaged removal efficiency of 66% and 69%, respectively. Coagulation-sedimentation and filtration removed TP efficiently. Enhanced coagulation may increases removal efficiency of MAP. Lower content of MAP can control biostability of drinking water.

Relationship between di-(2-ethylhexyl) phthalate concentration and chemical structure of organic matter on solids in drinking water treatment processes

2004 ◽  
Vol 4 (5-6) ◽  
pp. 321-333 ◽  
Author(s):  
Y. Thaveemaitree ◽  
F. Nakajima ◽  
H. Furumai ◽  
S. Kunikane
Keyword(s):  
Drinking Water ◽  
Organic Matter ◽  
Water Treatment ◽  
Toxic Substance ◽  
Drinking Water Treatment ◽  
Solid Particles ◽  
High Concentration ◽  
Fragment Composition ◽  
Treatment Processes ◽  
Ethylhexyl Phthalate

Di-(2-ethylhexyl) phthalate (DEHP), regarded as a toxic substance, is widely used and abundantly contaminated in environments. Via contamination of freshwater, DEHP can enter into drinking water treatment and be adsorbed on solid particles. This study was aimed at understanding the concentration phenomenon of DEHP in drinking water treatment process, focusing on the relationship between DEHP concentration and characteristics of organic matter on the solids formed in the processes as scum, suspended solid and sludge. Solid samples were collected from five drinking water treatment processes in Japan and analyzed by pyrolysis GC/MS. The solids were categorized by the sampling locations, solid types and fragment composition. The specificity of the pyrolysis fragments in each group was summarized into a matrix. When compared with concentration of DEHP and characteristics of organic matter, a solid specifically containing many specific aliphatic fragments contained significantly high concentration of DEHP.

scholarly journals PILOT PLANT KOMBINASI BIOFILTRASI DENGAN ULTRAFILTRASI UNTUK PENYEDIAAN AIR MINUM

2018 ◽  
Vol 8 (1) ◽  
Author(s):  
Wahyu Widayat
Keyword(s):  
Drinking Water ◽  
Organic Matter ◽  
Removal Efficiency ◽  
Raw Water ◽  
Domestic Waste ◽  
Water Company ◽  
Air Supply ◽  
Tube Removal ◽  
Tube Type ◽  
Iron Manganese

In big cities of Indonesia using river water as raw water PAM (drinking water company). The concentration of organic matter and ammonia in the raw water PAM is increasing due to industrial and domestic waste pollution. Biofiltration combination with ultrafiltration process is use as one alternative to reduce  concentration of organic matter, ammonia, iron, manganese and turbidity in raw water. In this treatment, biofilter reactor is use with plastic of Honeycomb tube type as media combined with ultrafiltration. Operational condition of treatment is variation of HRT (Hydraulyc Retention Time) between 1–4 hours and air supply between 0–30 l/min. The selected operational condition of treatment found at HRT of 2 hours and air supply of 20 l/min, with removal efficiency of concentration of organic, ammonia,iron, manganese, and turbidity are 68 %,65 %, 68 %, 67 %, and 72 % respectively.  Keywords:  Biofiltration, ultrafiltration, honeycomb tube, removal efficiency, drinking water.

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