Sewage Treatment by UASB-Reactor. Operation Results and Recommendations for Design and Utilization

1992 ◽  
Vol 25 (7) ◽  
pp. 143-157 ◽  
Author(s):  
S. M. M. Vieira ◽  
A. D. Garcia
Keyword(s):  
Wastewater Treatment ◽  
Technology Development ◽  
Sewage Treatment ◽  
Domestic Wastewater ◽  
Uasb Reactor ◽  
First Year ◽  
Second Phase ◽  
Treatment Processes ◽  
Domestic Wastewater Treatment ◽  
Operation Results

A 120 m3 UASB reactor for domestic wastewater treatment was designed and built, based upon results obtained through the operation of a 106 L pilot unit. This system was operated for four years for demonstration and technology development purposes. The results obtained in the first year of operation were already previously presented. After this period, some modifications were carried out aiming at design and operation and maintenance and facilities improvement. This was followed by a continuous 2-year operating period. In this work are presented some of the results obtained in this second phase of operation, with hydraulic retention times ranging from 5 to 15 h, resulting in an effluent with 50 to 150 mg COD.L−1 and 40 to 85 mg BOD.L−1. Some criteria are presented, together with the experience acquired in the development of this technology from the pilot reactor phase. During this period, several lectures and discussions about the system were held in relation to its use, operation and efficiency, leading to considerations about the advantages and convenience of this choice, by establishing a comparison between it and other wastewater treatment processes.

Evaluation of flocculation and dissolved air flotation as an advanced wastewater treatment

2001 ◽  
Vol 43 (8) ◽  
pp. 83-90 ◽  
Author(s):  
A. C. Pinto Filho ◽  
C. C. Brandão
Keyword(s):  
Wastewater Treatment ◽  
Domestic Wastewater ◽  
High Rate ◽  
Advanced Treatment ◽  
Dissolved Air Flotation ◽  
Anaerobic Reactor ◽  
Treatment Processes ◽  
Domestic Wastewater Treatment ◽  
Air Flotation ◽  
Dissolved Air

A bench scale study was carried out in order to evaluate the applicability of dissolved air flotation (DAF) as an advanced treatment for effluents from three different domestic wastewater treatment processes, namely: (i) a tertiary activated sludge plant ; (ii) an upflow sludge blanket anaerobic reactor (UASB); and (iii) a high-rate stabilization pond.

Domestic wastewater treatment using a UASB reactor

1997 ◽  
Vol 61 (3) ◽  
pp. 239-245 ◽  
Author(s):  
E. Behling ◽  
A. Diaz ◽  
G. Colina ◽  
M. Herrera ◽  
E. Gutierrez ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Domestic Wastewater ◽  
Uasb Reactor ◽  
Domestic Wastewater Treatment

scholarly journals ROLE OF PHYCOREMEDIATION IN DOMESTIC WASTEWATER TREATMENT

2020 ◽  
Vol 5 (2) ◽  
pp. 53-57
Author(s):  
Nandini Moondra ◽  
Namrata D Jariwala ◽  
Robin A Christian
Keyword(s):  
Wastewater Treatment ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Domestic Wastewater ◽  
Secondary Treatment ◽  
Organics Removal ◽  
Treated Effluent ◽  
Domestic Wastewater Treatment

Conventional domestic wastewater treatment in most developing countries is confined to secondary treatments, mainly focusing on solids and organics removal, which results in eutrophication when the effluents are discharged into receiving bodies. Thus, to resolve the issues associated with the conventional treatment system, in the present study, microalgae was introduced in the primary treated effluent collected from a sewage treatment plant to study the efficiency of the system in reducing eutrophication and other challenges of secondary treatment. Phycoremediation is an effective and eco-friendly treatment alternative that reduced the primary-treated effluent’s PO4-P, NH3-N and COD concentration to 97.89%, 98.81%, and 88.24%, respectively at the identical HRT practiced for secondary treatment. One-way ANOVA was also conducted to determine the effectiveness of the system statistically. The experimental and statistical analysis proved that microalgal treatment could resolve the challenges of conventional secondary treatments if adopted for domestic wastewater.

The Energy Efficiency of Domestic Wastewater Treatment Processes: Case Analysis

2020 ◽  
Vol 68 (4) ◽  
pp. 30-36
Author(s):  
Csaba BARTHA ◽  
Monica JIPA ◽  
Daniela Maria IGNAT ◽  
Attila TÓKOS ◽  
Iosif LINGVAY
Keyword(s):  
Energy Efficiency ◽  
Wastewater Treatment ◽  
Domestic Wastewater ◽  
Case Analysis ◽  
Treatment Processes ◽  
Domestic Wastewater Treatment

Anaerobic and Aerobic Submerged Bio-Filter System for Small Scale On-Site Domestic Sewage Treatment

1993 ◽  
Vol 27 (1) ◽  
pp. 51-57 ◽  
Author(s):  
T. Watanabe ◽  
K. Kuniyasu ◽  
H. Ohmori
Keyword(s):  
Water Pollution ◽  
Sewage Treatment ◽  
Domestic Wastewater ◽  
Domestic Sewage ◽  
Small Scale ◽  
Sewerage System ◽  
Black Water ◽  
Treatment Processes ◽  
Gray Water ◽  
Domestic Wastewater Treatment

In order to prevent water pollution and satisfy the demands for flush toilets in regions where a public sewerage system has not been in service, some on-site small scale domestic wastewater treatment processes called GAPPEI JOHKASOU have been developed to treat black water and gray water together in an individual house. Prior to its technical development, the characteristics of wastewater discharged from individual houses should be measured. The possibility of application of anaerobic filter is examined for processing organic wastewater at low concentration like in domestic wastewater, and an anaerobic filteris successfully developed to lengthen the sludge removal interval, since the flow rate of wastewater from individual houses is characterized by a large variation. It is difficult to serve the centralized treatment systems in many regions. Thus, a small GAPPEI JOHKASOU has been developed and propagated for by individual houses in such regions.

Coupling of sequencing batch reactor and UASB reactor for domestic wastewater treatment

Desalination ◽  
2009 ◽  
Vol 242 (1-3) ◽  
pp. 325-335 ◽  
Author(s):  
A. Moawad ◽  
U.F. Mahmoud ◽  
M.A. El-Khateeb ◽  
E. El-Molla
Keyword(s):  
Wastewater Treatment ◽  
Sequencing Batch Reactor ◽  
Batch Reactor ◽  
Domestic Wastewater ◽  
Uasb Reactor ◽  
Domestic Wastewater Treatment

scholarly journals Assessment of decentralized wastewater treatment systems in the rural area of Cuenca, Ecuador

2017 ◽  
Vol 12 (1) ◽  
pp. 240-249
Author(s):  
Andrés Alvarado ◽  
Josué Larriva ◽  
Esteban Sánchez ◽  
Diego Idrovo ◽  
Juan F. Cisneros
Keyword(s):  
Wastewater Treatment ◽  
Rural Areas ◽  
Domestic Wastewater ◽  
Rapid Urbanization ◽  
Treatment Processes ◽  
Domestic Wastewater Treatment ◽  
Physical Infrastructure ◽  
Wastewater Treatment Systems

The rapid urbanization of Cuenca, Ecuador, since about 1990 has led to efforts to build and operate decentralized domestic wastewater treatment systems in periurban and rural areas. The treatment efficiency of some of these is falling, however, and others are no longer working. ETAPA, the municipal institution in charge of water supply and sanitation, is evaluating them fully to identify common operating and maintenance difficulties, as well as deficiencies in design and/or construction. This paper presents an evaluation of the physical infrastructure and characterization of the treatment processes performed historically. The objective is to overcome the technical deficiencies and adopt a long-term, sustainable O&M plan.

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