Color removal and disinfection with UV/H2O2 system for wastewater reclamation and reuse

2005 ◽  
Vol 5 (1) ◽  
pp. 51-57 ◽  
Author(s):  
K.H. Ahn ◽  
K.Y. Park ◽  
S.K. Maeng ◽  
K.G. Song ◽  
K.P. Kim ◽  
...  
Keyword(s):  
Organic Matter ◽  
Uv Irradiation ◽  
Contact Time ◽  
Municipal Wastewater ◽  
Advanced Oxidation Process ◽  
Wastewater Treatment Plants ◽  
Municipal Wastewater Treatment ◽  
Wastewater Reclamation ◽  
Municipal Wastewater Treatment Plants ◽  
H2o2 System

Reuse of wastewater effluents from secondary treatment processes in municipal wastewater treatment plants has been issued because of substantial volumes of relatively clean waters. The major components of criteria for wastewater reclamations are color, organic matter, and pathogens. An advanced oxidation process with low-pressure ultraviolet and hydrogen peroxide addition (UV/H2O2 system) has been employed for removal of the major components in the criteria for reuse of wastewater. Sand filter pretreatment was applied to remove turbidity and to improve performance of UV irradiation. The results showed that total coliforms were effectively inactivated by the UV irradiation alone with the contact time of 30 minutes but color was remained. The addition of H2O2 significantly improved the removal of color and dissolved organic matter in the same contact time.

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.

scholarly journals A STUDY ON RENEWABLE ENERGY SOURCES AND MICROBIAL FUEL CELLS

2016 ◽  
Vol 2 (7) ◽  
Author(s):  
S Venkata Raju ◽  
K Madhusudhana
Keyword(s):  
Organic Matter ◽  
Renewable Energy ◽  
Fuel Cells ◽  
Anaerobic Digestion ◽  
Microbial Fuel Cells ◽  
Municipal Wastewater ◽  
Wastewater Treatment Plants ◽  
Renewable Energy Sources ◽  
Municipal Wastewater Treatment ◽  
Municipal Wastewater Treatment Plants

Renewable energy is the energy created by sources, which are naturally replenished such as sunlight, rain, wind and tides. Although there is much debate about how  to define and distinguish renewable energy from non-renewable, other energy types such as biomass, biofuel and anaerobic digestion are also widely considered as renewable energy. Microbial fuel cells(MFCs) that generate electricity by the break-down of organic matter(e.g. wastewater) have a great potential for the future energy and environmental challenges. MFCs are often compared with anaerobic digestion, which also uses microbial activity for breaking down organic matter in the absence of oxygen. Unlike anaerobic digestion, which is relatively well understood and already widely used in municipal wastewater treatment plants, MFCs have received far less attention and funding, hence the technology is still at laboratory level in its development.

scholarly journals An investigation of agricultural use potential of dewatered sewage sludge

2019 ◽  
Vol 6 (3) ◽  
pp. 179-184
Author(s):  
Seyed Mostafa Aghili ◽  
Nasser Mehrdadi ◽  
Behnoush Aminzadeh ◽  
Mohammad Ali Zazouli
Keyword(s):  
Electrical Conductivity ◽  
Organic Matter ◽  
Sewage Sludge ◽  
Fecal Coliform ◽  
Municipal Wastewater ◽  
Wastewater Treatment Plants ◽  
Physicochemical Characteristics ◽  
Municipal Wastewater Treatment ◽  
Class B ◽  
Municipal Wastewater Treatment Plants

Background: One of the useful applications of Dewatered sludge (DWS) of municipal wastewater treatment plants (WWTPs) is its use as manure in agriculture; therefore, its quality characteristics should be specified. The aim of this research was to determine biological and physicochemical characteristics of DWS of Sari WWTP and compare them with standards, and also to investigate its potential use in agriculture. Methods: Sludge samples were taken from the sewage sludge of Sari WWTP. Sampling and analysis of samples parameters including fecal coliform, salmonella, helminth ova, carbon, nitrogen, C/N, phosphorus, organic matter, potassium, moisture, electrical conductivity, and PH, were performed during four seasons with three replications based on the standard method. Results: The fecal coliform, salmonella, and helminth ova of the DWS were 2.37×106 ± 1.06×106 MPN/1 g d.s weight, 47±12.92 MPN/4 g d.s weight, and 466±61.85 number/4 g d.s weight, respectively, therefore, the DWS of Sari WWTP was categorized in the class B of the EPA standard. The amounts of C/N, organic matter, carbon, nitrogen, phosphorus, potassium, moisture, electrical conductivity, and PH were obtained to be 12.7±1.15, 42.4±3.27%, 24.6±1.89%, 1.94±0.13%, 2.35±0.6%, 0.57±0.13%, 82±3.12%, 1.34±0.21 ds/m, and 7.41± 0.45, respectively. Conclusion: The DWS of Sari WWTP has a good fertility value but it cannot be safely used in agriculture and should be improved for class A by the Processes to Further Reduce Pathogens (PFRP), especially by composting.

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.

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