Fate and Transport of Pathogens of Reclaimed Water in Floatation System

2011 ◽  
Vol 281 ◽  
pp. 286-290
Author(s):  
Pei Qian Dou ◽  
Chun Bao Sun
Keyword(s):  
Water Reuse ◽  
Reclaimed Water ◽  
Water Safety ◽  
Treatment Technology ◽  
Temporal And Spatial Distribution ◽  
Flotation Reagents ◽  
Index Study ◽  
Microbiological Water Quality ◽  
Variation Mechanism ◽  
Floatation Process

Reclaimed water contains a mass of pathogenic microorgansims, one of the main concerns for reclaimed water reuse is the microbiological water quality and thereby the possibility of spreading diseases. In recent years, most researches focused on deep treatment of waste water. However, few studies have considered variation mechanism and transport of pathogenic microorgansims in different environment .With the more and more application of reclaimed water in mining field, we should pay more attention to hygienic safety. The inactivation by temperature, grinding, flotation reagents and adsorption of pathogens with mineral particulates are of particular importance in determining pathogens transport and distribution. Consequently, based on a synthetical pathogenic microorgansims index, study should center on the effect of floatation environment and floatation process on survive of pathogenic microorgansims and variations mechanism; the fate, temporal and spatial distribution of pathogenic microorgansims in floatation system; transport disciplinarian of pathogen in floatation process. The result of this study provides a basis and technical advice for reclaimed water safety renovation and wastewater treatment technology.

Countermeasures Research and Consideration on Reclaimed Water Reuse in Residential District

2013 ◽  
Vol 438-439 ◽  
pp. 1290-1293
Author(s):  
Yun Wen ◽  
Yan Hong Wang ◽  
Luan Liu
Keyword(s):  
Water Reuse ◽  
Reclaimed Water ◽  
Water System ◽  
Water Source ◽  
Water Shortage ◽  
Water Saving ◽  
Treatment Technology ◽  
Residential District ◽  
Countermeasures Research

To establish reclaimed water system for the supply of urban miscellaneous water can alleviate water shortage in cities. For water-shortage cities, sewage recycling has especially significance. Based on the investigation into reclaimed water reuse in urban residential district, this paper explores a new path taking reclaimed water reuse as a new water-saving way to be applied in residential district, studies and analyzes the recyclable feasibility of reclaimed water system in the district, the choice of reclaimed water source, treatment technology and other aspects, and puts forward related suggestions. Some obstacles we have to overcome are also pointed out.

Current Situation and Prospect of Reclaimed Water Reuse

2013 ◽  
Vol 295-298 ◽  
pp. 1880-1884
Author(s):  
Jun Feng Qi ◽  
Lei Chen ◽  
Ren Jiao Ma
Keyword(s):  
Water Reuse ◽  
Reclaimed Water ◽  
Current Situation ◽  
Treatment Technology

The paper summarized current situation and treatment technology of the reclaimed water reuse at domestic and international, and analyzed benefits and development obstacles of the reclaimed water reuse.

Economic considerations and decision support tool for wastewater reuse scheme planning

2007 ◽  
Vol 56 (5) ◽  
pp. 175-182 ◽  
Author(s):  
R. Hochstrat ◽  
D. Joksimovic ◽  
T. Wintgens ◽  
T. Melin ◽  
D. Savic
Keyword(s):  
Water Reuse ◽  
Net Present Value ◽  
Wastewater Reuse ◽  
Reclaimed Water ◽  
Decision Support Tool ◽  
Critical Issue ◽  
Economic Feasibility ◽  
Support Tool ◽  
The Cost ◽  
Economic Considerations

The reuse of upgraded wastewater for beneficial uses is increasingly adopted and accepted as a tool in water management. However, funding of schemes is still a critical issue. The focus of this paper is on economic considerations of water reuse planning. A survey of pricing mechanisms for reclaimed water revealed that most schemes are subsidised to a great extent. In order to minimise these state contributions to the implementation and operation of reuse projects, their planning should identify a least cost design option. This also has to take into account the established pricing structure for conventional water resources and the possibility of gaining revenues from reclaimed water pricing. The paper presents a case study which takes into account these aspects. It evaluates different scheme designs with regard to their Net Present Value (NPV). It could be demonstrated that for the same charging level, quite different amounts of reclaimed water can be delivered while still producing an overall positive NPV. Moreover, the economic feasibility and competitiveness of a reuse scheme is highly determined by the cost structure of the conventional water market.

scholarly journals Applying the water safety plan to water reuse: towards a conceptual risk management framework

2015 ◽  
Vol 1 (5) ◽  
pp. 709-722 ◽  
Author(s):  
D. Goodwin ◽  
M. Raffin ◽  
P. Jeffrey ◽  
H. M. Smith
Keyword(s):  
Risk Management ◽  
Water Reuse ◽  
Management Approach ◽  
Water Safety ◽  
Management Framework ◽  
Risk Management Framework ◽  
Safety Plan ◽  
Research Programmes ◽  
Water Safety Plan ◽  
Guidelines And Standards

The Water Safety Plan (WSP) is receiving increasing attention as a recommended risk management approach for water reuse through a range of research programmes, guidelines and standards.

Water reclamation and reuse criteria in the U.S.

1996 ◽  
Vol 33 (10-11) ◽  
pp. 451-462 ◽  
Author(s):  
James Crook ◽  
Rao Y. Surampalli
Keyword(s):  
Surface Waters ◽  
Water Reuse ◽  
Reclaimed Water ◽  
Water Reclamation ◽  
Water Supplies ◽  
The Us ◽  
Attractive Option ◽  
Us Epa ◽  
The Individual ◽  
The U.S

Increasing demands on water resources for domestic, commercial, industrial, and agricultural purposes have made water reclamation and reuse an attractive option for conserving and extending available water supplies. Also, many water reuse projects are implemented to eliminate a source of contamination in surface waters or as a least-cost alternative to meeting stringent discharge requirements. Reclaimed water applications range from pasture irrigation to augmentation of potable water supplies. Water reclamation and reuse criteria are principally directed at health protection. There are no federal regulations governing water reuse in the U.S.; hence, the regulatory burden rests with the individual states. This has resulted in differing standards among states that have developed criteria. This paper summarizes and compares the criteria from some states that have developed comprehensive regulations. Guidelines published by the US. EPA and the rationale behind them are presented for numerous types of reclaimed water applications.

Chihuahua: a water reuse case in the desert

2004 ◽  
Vol 50 (2) ◽  
pp. 323-328 ◽  
Author(s):  
M.-S. Espino ◽  
C.-J. Navarro ◽  
J.-M. Pérez
Keyword(s):  
Water Supply ◽  
Water Reuse ◽  
Reclaimed Water ◽  
Educational Institutions ◽  
Secondary Effluent ◽  
Planning Strategy ◽  
Groundwater Aquifers ◽  
The Government ◽  
Industrial Zones ◽  
The City

Water supply for all kind of uses in Chihuahua is mainly groundwater. During the last decade this city has been damaged with a heavy hydrologic crisis because of a persistent drought. This came up with the overexploitation of groundwater aquifers; therefore a deficit between demand and offer was done. To minimize this problem the government authorities have started an integral plan of optimizing hydrologic resources which considers the treatment of wastewater and the use of reclaimed water. The secondary wastewater treatment facility of the city treats about 30,000 m3/d of a wastewater with high organic contents, and produces an effluent with low concentration of suspended solids, organic matter, fats, detergents, and metals. Reclaimed water is conveyed toward strategic sites for the irrigation of great green areas in sport clubs, educational institutions and industrial zones, besides of its utilization on some manufacturing processes, road service, and also over construction industry. The potential reuse of this water goes farther from those activities; the treatment of the secondary effluent until the required levels of the water-bearing recharge criteria are met for drinking water supply is considered as the next step to achieve through a suitable planning strategy for the best integral resource advantage.

Source water impact model (SWIM) - a watershed guided approach as a new planing tool for indirect potable water reuse

2001 ◽  
Vol 43 (10) ◽  
pp. 267-275 ◽  
Author(s):  
J. E. Drewes ◽  
P. Fox
Keyword(s):  
Water Quality ◽  
Water Reuse ◽  
Reclaimed Water ◽  
Water Sources ◽  
Distribution Data ◽  
Source Water ◽  
Impact Model ◽  
Water Impact ◽  
Potable Reuse ◽  
The Impact

The scope of this study was to develop a model to assess the impact of source water quality on reclaimed water used for indirect potable reuse. The source water impact model (SWIM) considered source water qualities, water supply distribution data, water use and the impact of wastewater treatment to calculate reclaimed water quality. It was applied for sulfate, chloride, and dissolved organic carbon (DOC) at four water reuse sites in Arizona and California. SWIM was able to differentiate between the amount of salts derived by drinking water sources and the amount added by consumers. At all sites, the magnitude of organic residuals in reclaimed water was strongly effected by the concentration of organics in corresponding water sources and effluent-derived organic matter. SWIM can be used as a tool to predict reclaimed water quality in existing or planned water reuse systems.

Characterization of bacterial isolates from water reclamation systems on the basis of substrate utilization patterns and regrowth potential in reclaimed water

2013 ◽  
Vol 68 (7) ◽  
pp. 1556-1565 ◽  
Author(s):  
Parinda Thayanukul ◽  
Futoshi Kurisu ◽  
Ikuro Kasuga ◽  
Hiroaki Furumai
Keyword(s):  
Amino Acids ◽  
Water Reuse ◽  
Reclaimed Water ◽  
Substrate Utilization ◽  
Water Reclamation ◽  
Operational Taxonomic Units ◽  
Utilization Patterns ◽  
Microbial Regrowth ◽  
Similar Growth

Microbial regrowth causes problems during water reuse. Comprehensive understanding of the microorganisms that can regrow in reclaimed water and their substrate requirements are necessary. In this study, potential regrowth organisms were isolated from seven water reclamation plants in Japan. Based on 16S rDNA analysis, the isolates were grouped into 34 operational taxonomic units, belonging to Alphaproteobacteria, Betaproteobacteria, Gammaproteobacteria, Actinobacteria, Bacteroidetes, and Firmicutes. Substrate utilization profiling using Biolog microplate™ classified the isolates into four groups. Bacteria in Cluster 1 (e.g., Methylobacterium sp. and Acinetobacter sp.) mainly utilized polymers, esters, amides, and alcohol. Isolates in Cluster 2 (e.g., Flavobacterium sp. and Microbacterium sp.) preferred to utilize polymers, carbohydrates, and esters. Isolates in Cluster 3 (e.g., Pseudomonas sp. and Acidovorax sp.) mainly utilized esters, carboxylic acids, and amino acids. Isolates in Cluster 4 (e.g., Enterobacter sp. and Rhodococcus sp.) utilized carbohydrates, esters, and amino acids. All isolates grew in reclaimed water treated by sand filtration, whereas some isolates could not grow in reclaimed water treated by coagulation and ozonation. Most bacteria in the same Biolog clusters exhibited similar growth characteristics in water samples. The potential of bacteria to regrow in reclaimed water likely depended on substrate requirement.

Overview on the Treatment Technology of Wastewater from Copper Mineral Processing (WCMP)

2013 ◽  
Vol 750-752 ◽  
pp. 1369-1372 ◽  
Author(s):  
Shu Zhao ◽  
Ji Ze Pan
Keyword(s):  
Suspended Solids ◽  
Mineral Resources ◽  
Mineral Processing ◽  
Ecological Environment ◽  
Treatment Technology ◽  
Flotation Reagents ◽  
Copper Mineral ◽  
Treatment Techniques ◽  
Exploitation And Utilization ◽  
Large Numbers

During the exploitation and utilization of the mineral resources, varieties of pollutants have been produced, which would impact the natural environment inevitably and bring many adverse effects to ecological environment and the human health. Its worth noting that the wastewater from copper mineral processing (WCMP) is one of the main source of mine environmental pollution. The WCMP is characterized by large quantity and containing large numbers of suspended solids, residual flotation reagents and heavy metals, etc. Wastewater can be discharged and realized reuse only after effective treatment. Recently, natural sedimentation, neutralization, flocculation, oxidation and other treatment techniques by wastes are the commonly used methods to treat the mineral processing wastewater.

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