Odourous algal-derived alkenes: differences in stability and treatment responses in drinking water

2007 ◽  
Vol 55 (5) ◽  
pp. 95-102 ◽  
Author(s):  
T. Satchwill ◽  
S.B. Watson ◽  
E. Dixon
Keyword(s):  
Drinking Water ◽  
Algal Blooms ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Raw Water ◽  
Water Supplies ◽  
Volatile Organic ◽  
Public Drinking Water ◽  
Treatment Responses ◽  
And Control

Drinking water supplies are often impacted by taste and odour (T/O) episodes caused by algal volatile organic compounds (AVOCs) from algal blooms. Treatment and control of these events is important to utility operators, as customer confidence in the safety of public drinking water supplies is based primarily on their palatability and odour. To manage T/O outbreaks successfully, knowledge about treatment responses of AVOCs and anticipation of their outbreaks are thus of major importance to the water industry. The Glenmore Reservoir and water treatment plant (GWTP) supplies drinking water to over 50% of the ca. 1 million consumers in Calgary (Alberta). Despite low nutrients and high raw water quality, the reservoir experiences periodic outbreaks of fishy/floral T/O, caused by chrysophytes and diatoms (Uroglena americana, Dinobryon spp., Synura petersenii, Asterionella formosa). These odours are produced by the unsaturated C7–C10 alkenes 2,4-heptadienal, 2,4,7-octatriene, 2,4-decadienal and 2,4,7-decatrienal, generated during from the enzymatic breakdown of algal polyunsaturated fatty acids (PUFAs). The formation, persistence and stability of these compounds in both the raw water and treatment plant is not well understood.

scholarly journals Analysis Of Raw Water Supply In Pucang Gading Housing Complex, District Of Demak To Preparation Of Water Resources And Water Resources Management

2018 ◽  
Vol 73 ◽  
pp. 03012
Author(s):  
Solikhul Abdi ◽  
Sudarno
Keyword(s):  
Drinking Water ◽  
Water Resources ◽  
Water Supply ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Water Source ◽  
Water Sources ◽  
Service Area ◽  
Raw Water ◽  
Housing Complex

Pucang Gading Housing Complex is an area within the Village Batursari, District of Demak with a population of 2018 as many as 44,257 inhabitants. Raw water service system Mranggen Unit is divided into 5 areas of service (service area Mranggen, Batursari I, Batursari II, Batursari III and Kebon) which utilize raw water source of water treatment plant (IPA Waru) and 8 Wells In a total discharge of 120 liter/second. The number of home connections in Pucang Gading area is currently 3,374 house connections, with a total water usage 14.25 liter/second Water discharges from clean water sources in Pucang Gading region are currently not maximally available to supply water to Pucang Gading service area. In this research will know the problems and readiness that exist by looking from the achievement of Medium Term Development Plan of Demak Regency Year 2016-2021. This research uses SWOT analysis method that is internal and external factors. The selection of raw water sources for drinking water should pay attention to aspects of quality, quantity and continuity. Demak Regency has the potential of surface water either river/ reservoir/dam. The problems and challenges of drinking water supply include issues of safe access to water supply, and regulation of groundwater utilization for the community.

Probabilistic design of a riverine early warning source water monitoring systemA paper submitted to the Journal of Environmental Engineering and Science.

2009 ◽  
Vol 36 (6) ◽  
pp. 1095-1106 ◽  
Author(s):  
Heather P. Sim ◽  
Donald H. Burn ◽  
Bryan A. Tolson
Keyword(s):  
Drinking Water ◽  
Early Warning ◽  
Treatment Plant ◽  
Drinking Water Treatment ◽  
Water Treatment Plant ◽  
Water Monitoring ◽  
Monitoring Station ◽  
Source Water ◽  
Water Supplies ◽  
Source Water Protection

Source water protection involves safeguarding water supplies from contamination and depletion. Despite best efforts, spills cannot always be prevented from entering a source water body. However, many spills can be prevented from entering a drinking water treatment plant if an early warning source water monitoring station is used. These stations provide downstream water utilities with advanced notification of spills so the utilities have time to implement their responses. This paper addresses the design of an early warning monitoring station for a riverine source of drinking water. Riverine water supplies face many threats related to accidental spills, which are inherently uncertain in nature. Therefore, designing a monitoring station for the detection of these events requires a probabilistic modelling approach. The design objectives include maximizing the probabilities of detection and of having a threshold amount of warning time. The methodology is applied to a water supply intake on the Grand River in southern Ontario.

scholarly journals UJI COBA PROSES KOAGULASI-FLOKULASI AIR BAKU UNTUK PDAM DANAU TELOKO DAN TELUK GELAM DI KAYU AGUNG KABUPATEN OKI PROPINSI SUMATERA SELATAN

2018 ◽  
Vol 6 (2) ◽  
Author(s):  
Petrus Nugro Rahardjo
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Quality Standards ◽  
Synthetic Polymer ◽  
Raw Water ◽  
Aluminum Sulphate ◽  
Optimum Ph ◽  
Trial Test

Regional Drinking Water Company (PDAM) of County Ogan Komering Ilir has two problematic water treatment units. The first is located in Danau Teloko and the other is in the Teluk Gelam. The main problem is that many organic pollutants (namely peat water) contained in raw water. Therefore, PDAM can not be optimal to supply all the needs of drinking water for the community. PDAM have tried to treat the raw water of peat with the process of flocculation and coagulation, but the results did not meet quality standards as drinking water. This research is a trial test to obtain the optimum condition for flocculation and coagulation processes in water treatment. The results were very succesful and get the optimum pH is about 7.5 and a chemical dose of 80 ppm Aluminum Sulphate as the coagulant. Turbidity of water produced is 4 NTU and visually looks very clean. Better to add a synthetic polymer (PAC) as an additive to the process of flocculation and coagulation. Based on calculations, PDAM Danau Teloko will require the amount of coagulant (Aluminum Sulphate) 138.24 kg per day to produce 40 liters of drinking water per second. Keywords : Raw Water, Flocculation, Coagulation,  Water Treatment Plant

Speciation and seasonal variation of various disinfection by-products in a full-scale drinking water treatment plant in East China

2019 ◽  
Vol 19 (6) ◽  
pp. 1579-1586 ◽  
Author(s):  
Xiang-Ren Zhou ◽  
Yi-Li Lin ◽  
Tian-Yang Zhang ◽  
Bin Xu ◽  
Wen-Hai Chu ◽  
...  
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
Treatment Plant ◽  
Drinking Water Treatment ◽  
Water Treatment Plant ◽  
Full Scale ◽  
East China ◽  
Raw Water ◽  
Drinking Water Treatment Plant ◽  
By Products

Abstract The objective of this research was to study the occurrence and seasonal variations of disinfection by-products (DBPs), including traditional carbonaceous and emerging nitrogenous DBPs, in a full-scale drinking water treatment plant (DWTP) for nearly 2 years. The removal efficiencies of each DBP through the treatment processes were also investigated. This DWTP takes raw water from the Yangtze River in East China. The quality of the raw water used in this DWTP varied with different seasons. The results suggested that DBP concentrations of the finished water were higher in spring (82.33 ± 15.12 μg/L) and summer (117.29 ± 9.94 μg/L) with higher dissolved organic carbon (DOC) levels, but lower in autumn (41.10 ± 5.82 μg/L) and winter (78.47 ± 2.74 μg/L) with lower DOC levels. Due to the increase of bromide concentration in spring and winter, more toxic brominated DBPs increased obviously and took up a greater proportion. In this DWTP, DBP concentrations increased dramatically after pre-chlorination, especially in summer. It is noteworthy that the removal of DBPs during the subsequent treatment was more obvious in spring than in the other three seasons because the pH value is more beneficial to coagulation in spring.

Monitoring, environmental emergencies management and water treatment improvement of freshwater lakes in China: the Chao Lake case study

2011 ◽  
Vol 11 (4) ◽  
pp. 490-496
Author(s):  
V. Mezzanotte ◽  
M. Bresciani ◽  
S. Canobbio ◽  
C. Giardino ◽  
M. Antonelli ◽  
...  
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
Monitoring System ◽  
Algal Blooms ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Eutrophic Lake ◽  
Freshwater Lakes ◽  
Emergency Situations ◽  
Safety Of Drinking Water

Severe eutrophication of freshwater lakes, with the subsequent risk of algal blooms, has a critical effect on the safety of drinking water supplies in China and is one of the main environmental emergencies in the country. This paper focuses on Chao Lake, a large, shallow eutrophic lake used as a source of drinking water. The study considers the possibilities of improving the lake monitoring system and developing a SCADA system to manage the emergencies relating to water quality in order to meet the need of ensuring safe drinking water to the population of Chaohu City. The paper is presented in sub-sections that reflect the multitasking nature of the study, which focused on: (a) upgrading the monitoring system at lake and water treatment plant levels and also applying remote sensing, to develop a SCADA (Supervisory Control And Data Acquisition) system using neural networks to support prompt and effective management of emergency situations; (b) upgrading water collection and treatment technologies.

scholarly journals IMPLEMENTATION OF WATER SAFETY PLAN FOR TAN HIEP WATER PLANT

2009 ◽  
Vol 12 (2) ◽  
pp. 85-96
Author(s):  
Hung Viet Dang ◽  
Tran Thi Hong Le ◽  
Khanh Tuan Tran
Keyword(s):  
Water Treatment ◽  
Risk Mitigation ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Raw Water ◽  
Water Safety ◽  
Technical Problems ◽  
Safety Plan ◽  
Water Safety Plan ◽  
And Control

Water is the essential need in human daily life for health safety, living conditions improvement, national industrialization and modernization. Research and development of the water safety plan for Tan Hiep water treatment plant is necessary and urgent to solve this problems. The aims of water safety plan (WSP) include: • To prevent and control the contamination of the source of its raw water; • To treat efficiency of contamination pollutants in water; • To prevent from re-contamination during storage, distribution and handling; and • Ensure to meet target quality at all processes of the water treatment chain. The aim of this paper was to develop the WSP, personnel organization; writing documents, describing system, calculating, assessing, and forecasting risks through data on water quality, then proposing risk mitigation and protection of technical problems overcome. The results showed that water safety plan has been the correct direction to improve responsibilities of SAWACO in supply clean water from safe, water resource for human. Besides that, this research can provide SAWACO the good measures for prevention from the pathogenous risks raw water resoures.

scholarly journals A web-based early-warning service to monitor drinking-water treatment plant operations

2010 ◽  
pp. 69-73
Author(s):  
Franclin S. Foping
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
Distribution Systems ◽  
Treatment Plant ◽  
Drinking Water Treatment ◽  
Water Treatment Plant ◽  
World Health ◽  
Raw Water ◽  
Supply And Distribution ◽  
The World

Drinking contaminated water can be harmful to our health. According to the World Health Organization, about 1.8 million people die every year across the world from water-borne diseases mainly caused by polluted drinking water. Furthermore, the cryptosporidium outbreak that happened in Galway in 2007 indicates the urgency to provide appropriate solutions in order to counteract this ominous situation in the country. Water treatment plants (WTP) are basic components of modern water supply and distribution systems. These are engineering systems that purify raw water to specific safety levels. The raw water passes through a series of treatment phases wherein it is processed and purified according to existing safety protocols regulating drinking water. After undergoing a purification step, the drinking water is distributed to the consumers through a network of pipes, pumps and reservoirs. The research presented in this report is focused on the safety of these critical infrastructures. In particular, the ...

Daphnia behavioural responses to taste and odour compounds: ecological significance and application as an inline treatment plant monitoring tool

2007 ◽  
Vol 55 (5) ◽  
pp. 23-31 ◽  
Author(s):  
S.B. Watson ◽  
F. Jüttner ◽  
O. Köster
Keyword(s):  
Continuous Monitoring ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Swimming Velocity ◽  
Raw Water ◽  
Monitoring Tool ◽  
Short Term ◽  
Time Period ◽  
Volatile Organic ◽  
Plant Monitoring

Continuous monitoring of volatile organic compounds (VOC) in raw water is highly desirable for taste and odour management, but in most treatment plants this capacity is lacking. We used a bbe©Daphnia toximeter installed in the Zurich water treatment plant to determine if Daphnia magna could be used to monitor odour compounds in source-water. Trace levels of two widely distributed biogenic VOCs in freshwater: β-cyclocitral and 2(E),4(E),7(Z)-decatrienal were added to the raw water inflow to chambers containing test animals and their behaviour was recorded using a high resolution camera. We observed that each compound elicited a marked short-term increase in Daphnia swimming velocity, but the effect was brief and an acclimation to the compounds was observed after a time period or with repeated additions. The results demonstrate that the toximeter has considerable potential as a tool to monitor certain VOCs in water, and that Daphnia perceive and react to 2(E),4(E),7(Z)-decatrienal and β-cyclocitral at concentrations between 2.5 and 25 μM

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