Evaluation of the California Wastewater Reclamation Criteria Using Enteric Virus Monitoring Data

1992 ◽  
Vol 26 (7-8) ◽  
pp. 1513-1524 ◽  
Author(s):  
T. Asano ◽  
L. Y. C. Leong ◽  
M. G. Rigby ◽  
R. H. Sakaji
Keyword(s):  
Municipal Wastewater ◽  
Enteric Virus ◽  
Monitoring Data ◽  
Municipal Wastewater Treatment ◽  
Wastewater Reclamation ◽  
Food Crop ◽  
Reclaimed Wastewater ◽  
Ground Water Recharge ◽  
Wastewater Reclamation And Reuse ◽  
Crop Irrigation

The State of California's WastewaterReclamationCriteria is under review and will be revised and expanded to include several new regulations on the use of reclaimed municipal wastewater. To provide a scientific basis for the evaluation of the existing and proposed Criteria, enteric virus monitoring data from secondary and tertiary effluents were evaluated. These virus data were obtained from special studies and monitoring reports, covering the period from 1975 to 1989, including ten municipal wastewater treatment facilities in California. Based on the enteric virus data from these reports, and using the current Criteria as a guide, four exposure scenarios were developed to determine the risk of waterborne enteric virus infection to humans as a consequence of wastewater reclamation and reuse. The exposure assessments included food crop irrigation, landscape irrigation for golf courses, recreational impoundments, and ground water recharge. The virus enumeration and the resulting risk assessments described in this paper provide a comparative basis for addressing the treatment and fate of enteric viruses in wastewater reclamation and reuse. The analyses show that annual risk of infection from exposure to chlorinated tertiary effluent containing 1 viral unit/100 L in recreational activities such as swimming or golfing is in the range of 10−2 to 10−7, while exposures resulting from food-crop irrigation or groundwater recharge with reclaimed municipal wastewater is in the range of 10−6 to 10−11. The risk analyses are also used to demonstrate that the probability of infection can be further mitigated by controlling exposure to reclaimed wastewater in the use area.

Wastewater reclamation and reuse in Europe: a model-based potential estimation

2005 ◽  
Vol 5 (1) ◽  
pp. 67-75 ◽  
Author(s):  
R. Hochstrat ◽  
T. Wintgens ◽  
T. Melin ◽  
P. Jeffrey
Keyword(s):  
Water Availability ◽  
Mediterranean Region ◽  
Municipal Wastewater ◽  
Wastewater Reuse ◽  
Current Status ◽  
Wastewater Reclamation ◽  
Reclaimed Wastewater ◽  
Future Projection ◽  
Treated Effluent ◽  
Wastewater Reclamation And Reuse

The basic aim of this paper is to present an approach to quantitatively assess the potential of municipal wastewater reclamation and reuse in a European context. The model developed is based on the analysis and interrelation of water management data like water availability, water demand and treated effluent. In conjunction with information about the current status of wastewater reuse simple key figures are deduced, which allow future projection of wastewater reclamation and reuse. The simulation points out that there is a significant potential for an increased utilisation of reclaimed wastewater in many European countries, specifically in the Mediterranean region driven by different factors like increased wastewater treatment capacity and higher demand for irrigation and groundwater recharge.

Aspects of municipal wastewater reclamation and reuse for future water resource shortages in Taiwan

2007 ◽  
Vol 55 (1-2) ◽  
pp. 397-405 ◽  
Author(s):  
R.J. Chiou ◽  
T.C. Chang ◽  
C.F. Ouyang
Keyword(s):  
Wastewater Treatment ◽  
Water Resources ◽  
Water Reuse ◽  
Municipal Wastewater ◽  
Wastewater Treatment Plants ◽  
Treated Wastewater ◽  
Municipal Wastewater Treatment ◽  
Wastewater Reclamation ◽  
Wastewater Reclamation And Reuse ◽  
Municipal Wastewater Treatment Plants

The Water Resources Agency (WRA), Ministry of Economic Affairs (MOEA) has predicted that the annual water demand in Taiwan will reach approximately 20 billion m3 by 2021. However, the present water supply is only 18 billion m3 per year. This means that an additional 2 billion m3 have to be developed in the next 17 years. The reuse of treated wastewater effluent from municipal wastewater treatment plants could be one target for the development of new water resources. The responsible government departments already have plans to construct public sewerage systems in order to improve the quality of life of the populace and protect the environment. The treated wastewater effluent from such municipal wastewater treatment plants could be a very stable and readily available secondary type of water resource, different from the traditional types of water resources. The major areas where reclaimed municipal wastewater can be used to replace traditional fresh water resources include agricultural and landscape irrigation, street cleaning, toilet flushing, secondary industrial reuse and environmental uses. However, necessary wastewater reclamation and reuse systems have not yet been established. The requirements for their establishment include water reuse guidelines and criteria, the elimination of health risks ensuring safe use, the determination of the wastewater treatment level appropriate for the reuse category, as well as the development and application of management systems reuse. An integrated system for water reuse would be of great benefit to us all by providing more efficient ways to utilise the water resources.

Risk analysis of wastewater reclamation and reuse

1996 ◽  
Vol 33 (10-11) ◽  
pp. 297-302 ◽  
Author(s):  
Jacques Ganoulis ◽  
Anastasia Papalopoulou
Keyword(s):  
Risk Analysis ◽  
Municipal Wastewater ◽  
Sewage Treatment ◽  
Enteric Virus ◽  
Climatic Conditions ◽  
Aquifer Recharge ◽  
Wastewater Reclamation ◽  
Alternative Technologies ◽  
Wastewater Reclamation And Reuse ◽  
States Of Nature

Wastewater reclamation and reuse involve alternative technologies for sewage treatment (biological oxidation, nitrification-denitrification, use of lagoons and aquifer recharge), different states of nature (climatic conditions, type of soils, irrigated crops, irrigation systems, socio-economic environments) and various preferences or criteria (economic, environmental, aesthetics, etc.). Although tertiary treatment of municipal wastewater should be applied before any recycling of wastewater a risk still exists from enteric virus and toxic contaminations. To determine risks from wastewater reclamation and reuse, the engineering risk analysis is a very useful framework (Ganoulis, 1994). The various steps to be undertaken for a comprehensive application of risk analysis techniques to wastewater reclamation and reuse are summarized in this paper. These are (a) identification of hazards, (b) risk quantification, (c) consequences of risk and (d) risk management. The main objective of the analysis is to develop a Decision Support System (DSS) for managing the risks related to a particular application of wastewater reclamation and reuse.

The role of physical-chemical treatment in wastewater reclamation and reuse

1998 ◽  
Vol 37 (10) ◽  
pp. 79-90 ◽  
Author(s):  
Avner Adin ◽  
Takashi Asano
Keyword(s):  
Public Health ◽  
Wastewater Treatment ◽  
Municipal Wastewater ◽  
Water Environment ◽  
Enteric Virus ◽  
Cost Effective ◽  
Wastewater Reclamation ◽  
Chemical Coagulation ◽  
Practical Applications ◽  
Wastewater Reclamation And Reuse

Amid the heightened public health concerns for emerging microorganisms such as cryptosporidium and enteropathogenic E. coli in the water environment, there have been many instances where optimization of chemical coagulation-flocculation processes and filtration of wastewater was not achieved in practice, resulting in waste of coagulant chemicals and breach of the multiple barriers to pathogen removal and inactivation; thus, unnecessarily endangering public health. In addition, lack of information on the optimization of these processes has hampered the establishment of alternative and more cost-effective wastewater reclamation methods for tertiary and advanced wastewater treatment. Thus, the purpose of this paper is to evaluate the basic factors affecting the optimization of chemical coagulation-flocculation and filtration processes in municipal wastewater reclamation and reuse, based on the theoretical developments and practical applications. Reference is also made to the wastewater treatment processes and operations that can produce reclaimed water with an extremely small probability of enteric virus contamination.

Estimating the safety of wastewater reclamation and reuse using enteric virus monitoring data

1998 ◽  
Vol 70 (1) ◽  
pp. 39-51 ◽  
Author(s):  
Hiroaki Tanaka ◽  
Takashi Asano ◽  
Edward D. Schroeder ◽  
George Tchobanoglous
Keyword(s):  
Enteric Virus ◽  
Monitoring Data ◽  
Wastewater Reclamation ◽  
Wastewater Reclamation And Reuse

A study about the use of chemicals in conventional tertiary treatment. Performances comparison of three municipal wastewater treatment plants and pilot plant experiences

2011 ◽  
Vol 6 (1) ◽  
Author(s):  
A. Iborra-Clar ◽  
J.A. Mendoza-Roca ◽  
A. Bes-Pií ◽  
J.J. Morenilla-Martínez ◽  
I. Bernácer-Bonora ◽  
...  
Keyword(s):  
Water Quality ◽  
Wastewater Treatment ◽  
Pilot Plant ◽  
Municipal Wastewater ◽  
Wastewater Treatment Plants ◽  
Secondary Effluent ◽  
Municipal Wastewater Treatment ◽  
Wastewater Reclamation ◽  
Valencian Region ◽  
Municipal Wastewater Treatment Plants

Rainfall diminution in the last years has entailed water scarcity in plenty of European regions, especially in Mediterranean areas. As a consequence, regional water authorities have enhanced wastewater reclamation and reuse. Thus, the implementation of tertiary treatments has become of paramount importance in the municipal wastewater treatment plants (WWTP) of Valencian Region (Spain). Conventional tertiary treatments consist of a physico-chemical treatment of the secondary effluent followed by sand filtration and UV radiation. However, the addition of coagulants and flocculants sometimes does not contribute significantly in the final water quality. In this work, results of 20-months operation of three WWTP in Valencian Region with different tertiary treatments (two without chemicals addition and another with chemicals addition) are discussed. Besides, experiments with a 2 m3/h pilot plant located in the WWTP Quart-Benager in Valencia were performed in order to evaluate with the same secondary effluent the effect of the chemicals addition on the final water quality. Results showed that the addition of chemicals did not improve the final water quality significantly. These results were observed both comparing the three full scale plants and in the pilot plant operation.

Performance of a combined eco-system of ponds and constructed wetlands for wastewater reclamation and reuse

2005 ◽  
Vol 51 (12) ◽  
pp. 315-323 ◽  
Author(s):  
L. Wang ◽  
J. Peng ◽  
B. Wang ◽  
R. Cao
Keyword(s):  
Wastewater Treatment ◽  
Municipal Wastewater ◽  
Wastewater Treatment Plants ◽  
National Standards ◽  
Municipal Wastewater Treatment ◽  
Wastewater Reclamation ◽  
Effluent Quality ◽  
Major Mechanism ◽  
Removal Efficiencies ◽  
Municipal Wastewater Treatment Plants

An on-site study on the operational performance of a combined eco-system of ponds and SF constructed wetland for municipal wastewater treatment and reclamation/reuse in Donging City, Shandong, China was carried out from January 2001 through October 2003. The removal efficiencies for various main parameters were: TSS 84.8±7.3%, BOD5 87.2±5.3%, CODCr 70.2±18.6%, TP 52.3±23.1%, and NH3-N 54.8±23.9% with effluent concentration of TSS 9.12±5.12 mg/l, BOD5 6.44±4.58 mg/l, CODCr 42.8±6.7 mg/l, TP 0.94±0.27 mg/l and NH3-N 7.95±2.36 mg/l. In addition, the removal efficiencies for faecal coliforms and total bacteria were >99.97% and >99.998% respectively, which well meet Chinese National standards for effluent quality of municipal wastewater treatment plants. The composition of TSS was closely related to CODCr and BOD5 variations, and nitrification-denitrification is the major mechanism of nitrogen removal both in ponds and in wetlands. In addition, sedimentation also played an important role in the removal of TSS, nitrogen, phosphorus and BOD5. The removal efficiencies of various parameters, the number of species and biomass of biological community in the system increased gradually with the ecological maturation.

Advanced Wastewater Treatment and Reuse: Related Problems and Perspectives in Italy

1999 ◽  
Vol 40 (4-5) ◽  
pp. 21-28 ◽  
Author(s):  
L. Bonomo ◽  
C. Nurizzo ◽  
E. Rolle
Keyword(s):  
Wastewater Treatment ◽  
Municipal Wastewater ◽  
Treatment Options ◽  
Environmental Crisis ◽  
Municipal Wastewater Treatment ◽  
Wastewater Reclamation ◽  
Regional Trends ◽  
Italian Regions ◽  
Advanced Wastewater Treatment ◽  
Treatment Trends

An overview of water availability and distribution, water consumption, wastewater treatment trends, with particular reference to advanced ones, is briefly presented. Data about the current situation of municipal wastewater treatment and advanced treatment options are presented and regional trends about wastewater reclamation (agricultural and industrial reuse) are summarised. Some considerations about present and possible future standards, both for disposal into surface waters and for wastewater reclamation in agriculture are discussed. A short list of examples in the field of advanced wastewater treatment and reclamation in various Italian regions is presented and some information about environmental crisis areas in Italy is given.

Survey on production quality of electrodialysis reversal and reverse osmosis on municipal wastewater desalination

2012 ◽  
Vol 66 (10) ◽  
pp. 2185-2193 ◽  
Author(s):  
Yi-Che Hsu ◽  
Hsin-Hsu Huang ◽  
Yu-De Huang ◽  
Ching-Ping Chu ◽  
Yu-Jen Chung ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Reverse Osmosis ◽  
Wastewater Treatment Plant ◽  
Municipal Wastewater ◽  
Treatment Plant ◽  
Municipal Wastewater Treatment ◽  
Wastewater Reclamation ◽  
Sand Filter ◽  
Monovalent Ions

Water shortage has become an emerging environmental issue. Reclamation of the effluent from municipal wastewater treatment plant (WWTP) is feasible for meeting the growth of water requirement from industries. In this study, the results of a pilot-plant setting in Futian wastewater treatment plant (Taichung, Taiwan) were presented. Two processes, sand filter – ultrafiltration – reverse osmosis (SF-UF-RO) and sand filter – electrodialysis reversal (SF-EDR), were operated in parallel to evaluate their stability and filtrate quality. It has been noticed that EDR could accept inflow with worse quality and thus required less pretreatment compared with RO. During the operation, EDR required more frequent chemical cleaning (every 3 weeks) than RO did (every 3 months). For the filtrate quality, the desalination efficiency of SF-EDR ranged from 75 to 80% in continuous operation mode, while the conductivity ranged from 100 to 120 μS/cm, with turbidity at 0.8 NTU and total organic carbon at 1.3 mg/L. SF-EDR was less efficient in desalinating the multivalent ions than SF-UF-RO was. However for the monovalent ions, the performances of the two processes were similar to each other. Noticeably, total trihalomethanes in SF-EDR filtrate was lower than that of SF-UF-RO, probably because the polarization effects formed on the concentrated side of the EDR membrane were not significant. At the end of this study, cost analysis was also conducted to compare the capital requirement of building a full-scale wastewater reclamation plant using the two processes. The results showed that using SF-EDR may cost less than using SF-UF-RO, if the users were to accept the filtrate quality of SF-EDR.

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