scholarly journals Correction: Deep-bed filters as post-treatment for ozonation in tertiary municipal wastewater treatment: impact of design and operation on treatment goals

2021 ◽  
Vol 7 (1) ◽  
pp. 232-232
Author(s):  
Daniel Sauter ◽  
Agata Dąbrowska ◽  
Robert Bloch ◽  
Michael Stapf ◽  
Ulf Miehe ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Municipal Wastewater ◽  
Post Treatment ◽  
Treatment Goals ◽  
Municipal Wastewater Treatment

Correction for ‘Deep-bed filters as post-treatment for ozonation in tertiary municipal wastewater treatment: impact of design and operation on treatment goals’ by Daniel Sauter et al., Environ. Sci.: Water Res. Technol., 2021, DOI: 10.1039/d0ew00684j.

scholarly journals Deep-bed filters as post-treatment for ozonation in tertiary municipal wastewater treatment: impact of design and operation on treatment goals

2021 ◽  
Vol 7 (1) ◽  
pp. 197-211
Author(s):  
Daniel Sauter ◽  
Agata Dąbrowska ◽  
Robert Bloch ◽  
Michael Stapf ◽  
Ulf Miehe ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Organic Contaminants ◽  
Contact Time ◽  
Municipal Wastewater ◽  
Filter Material ◽  
Post Treatment ◽  
Treatment Goals ◽  
Municipal Wastewater Treatment

The removal of organic contaminants during post-treatment with deep-bed filters after ozonation in tertiary municipal wastewater treatment can be optimised by the choice of filter material and contact time.

A sustainable municipal wastewater treatment process for tropical and subtropical regions in developing countries

1997 ◽  
Vol 35 (9) ◽  
pp. 191-198 ◽  
Author(s):  
Yu Hanqing ◽  
Joo-Hwa Tay ◽  
Francis Wilson
Keyword(s):  
Wastewater Treatment ◽  
Municipal Wastewater ◽  
Treatment Process ◽  
Anaerobic Treatment ◽  
Post Treatment ◽  
Treatment System ◽  
Municipal Wastewater Treatment ◽  
Wastewater Treatment Process ◽  
Pre Treatment ◽  
Reed Bed

In this paper, a feasible municipal wastewater treatment process, using the upflow anaerobic sludge blanket (UASB) or the anaerobic baffled reactor (ABR) as an anaerobic pre-treatment system, and the reed bed or the stabilization pond with supporting media as a post-treatment system, is presented and discussed. Results obtained in pilot- and full-scale treatment plants clearly reveal that the anaerobic treatment is indeed a very attractive option for municipal wastewater pre-treatment at temperatures exceeding 20C in tropical and subtropical regions. The UASB system has been commonly employed as an anaerobic pre-treatment system. The ABR provides another potential for the anaerobic pre-treatment. The effluents from the anaerobic treatment system should be post-treated to meet discharge standards. Because of the advantages of the reed bed system when it is employed for tertiary treatment, this system could be considered as a post-treatment system. Another cost-effective system, the stabilization pond packed with attached-growth media, is also a potential post-treatment system.

scholarly journals Different engineering designs have profoundly different impacts on the microbiome and nitrifying bacterial populations in municipal wastewater treatment bioreactors

2021 ◽  
Author(s):  
Taegyu Kim ◽  
Sebastian Behrens ◽  
Timothy LaPara
Keyword(s):  
Wastewater Treatment ◽  
Activated Sludge ◽  
Community Composition ◽  
Municipal Wastewater ◽  
Specific Treatment ◽  
Treatment Goals ◽  
Municipal Wastewater Treatment ◽  
Α Diversity ◽  
Treatment Facilities ◽  
System Designs

Numerous wastewater treatment processes are designed by engineers to achieve specific treatment goals. However, the impact of these different process designs on bacterial community composition is poorly understood. In this study, 24 different municipal wastewater treatment facilities (37 bioreactors) with various system designs were analyzed by sequencing of PCR-amplified 16S rRNA gene fragments. Although a core microbiome was observed in all of the bioreactors, the overall microbial community composition (analysis of molecular variance; P = 0.001) as well as a specific population of Nitrosomonas spp. ( P = 0.04) were significantly different between A/O (anaerobic/aerobic) systems and conventional activated sludge (CAS) systems. Community α-diversity (number of observed operational taxonomic units [OTUs] and Shannon diversity index) was also significantly higher in A/O systems compared to CAS systems (Wilcoxon; P < 2 × 10 −16 ). In addition, wastewater bioreactors with short mean cell residence time (< 2 days) had very low community α-diversity and fewer nitrifying bacteria compared to other system designs. Nitrospira spp. (0.71%) and Nitrotoga spp. (0.41%) were the most prominent nitrite oxidizing bacteria (NOB); because these two genera were rarely prominent community members at the same time, these populations appeared to be functionally redundant. Weak evidence (AOB:NOB ≪ 2; substantial quantities of Nitrospira spp. sublineage II) was also obtained suggesting that complete ammonia oxidation by a single organism was occurring in system designs known to impose stringent nutrient limitation. This research demonstrates that design decisions made by wastewater treatment engineers significantly impact the microbiome of wastewater treatment bioreactors. IMPORTANCE Municipal wastewater treatment facilities rely on the application of numerous “activated sludge” process designs to achieve site-specific treatment goals. A plethora of microbiome studies on municipal wastewater treatment bioreactors have been previously performed; however, the role of process design on the municipal wastewater treatment microbiome is poorly understood. In fact, wastewater treatment engineers have attempted to control the microbiome of wastewater bioreactors for decades without sufficient empirical evidence to support their design paradigms. Our research demonstrates that engineering decisions with respect to system design have a significant impact on the microbiome of wastewater treatment bioreactors.

STUDIES REGARDING THE PERFORMANCES OF MUNICIPAL WASTEWATER TREATMENT PROCESSES

2006 ◽  
Vol 5 (4) ◽  
pp. 685-692
Author(s):  
Elisabeta Chirila ◽  
Ionela Carazeanu Popovici ◽  
Techin Ibadula ◽  
Alice Iordache
Keyword(s):  
Wastewater Treatment ◽  
Municipal Wastewater ◽  
Municipal Wastewater Treatment ◽  
Treatment Processes
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