A comparative assessment of intensive and extensive wastewater treatment technologies for removing emerging contaminants in small communities

Abstract When implementing a sanitation system, the selection of treatment process can be difficult. Beyond removal efficiency and effluent concentrations, reliability should be taken into account. This study compares reliability of French vertical flow treatment wetlands (F-VFTW) with the four main decentralized wastewater treatment technologies in small communities in the French Overseas Territories (FOT). Analysis of 963 regulatory self-monitoring sampling campaigns performed on 213 wastewater treatment plants show that operational disruptions due to sludge loss and loss of nitrification are often reported for activated sludge technology; rotating biological contactors often suffer from weak settlement; facultative pond removal is limited by algae; and F-VFTW fulfills all the French regulatory objectives at a frequency of 90 to 95%. In addition, the data from this study are compared to a similar database from Brazil using a statistical approach (coefficient of reliability). Amongst the eight decentralized wastewater treatment technologies evaluated, F-VFTW appears to be the most appropriate for achieving the discharge standard with a reliability close to 95%. Its reliability to face both environmental (rainfall) and social (maintenance capacities) constraints is a key parameter.

Download Full-text

Contemporary Developments in Waste Water Treatment Technologies

Advances in Environmental Engineering and Green Technologies - Eco-Friendly Energy Processes and Technologies for Achieving Sustainable Development ◽

10.4018/978-1-7998-4915-5.ch011 ◽

2021 ◽

pp. 196-219

Author(s):

Mohit Dev Awasthi ◽

Mukesh Kumar Pandey ◽

Trilok Chauhan ◽

Mir Sayed Shah Danish ◽

Dheeraj Kumar ◽

...

Keyword(s):

Wastewater Treatment ◽

Emerging Contaminants ◽

Waste Water Treatment ◽

Nanocomposite Materials ◽

Environment Friendly ◽

Methods And Techniques ◽

Nano Cellulose ◽

Investment Capital ◽

Treatment Technologies ◽

Brighter Future

Water is the sole reason for the existence of life and prime nutrient to sustain it. So, it becomes extremely important to preserve wastewater to utilize it efficiently for various purposes. The methods and techniques that have the least investment capital, qualitative output, and environment-friendly content are desired. Such unaccustomed methods are our hope for a cleaner, safer, and brighter future. This chapter revolves around the methods employed to brawl the threats posed to the viability of water at earth from emerging contaminants and the efforts made by mankind to prevent it. Nanotechnology has potent attributes for water decontamination. Several nanotech-based devices, methods, and treatments have been used in recent times for wastewater treatment such as nanomembranes, nano photocatalysts, nano-cellulose, nano-absorbent, and nanocomposite materials. The chapter discusses these contemporary developments in nano-based technologies and the various advancements, which have been recently made in conventional techniques used for wastewater treatment technologies.

Download Full-text

Comparative assessment of phthalate removal and risk in biological wastewater treatment systems of developing countries and small communities

The Science of The Total Environment ◽

10.1016/j.scitotenv.2016.06.182 ◽

2016 ◽

Vol 569-570 ◽

pp. 661-671 ◽

Cited By ~ 16

Author(s):

Khalid Muzamil Gani ◽

Absar Ahmad Kazmi

Keyword(s):

Developing Countries ◽

Wastewater Treatment ◽

Comparative Assessment ◽

Biological Wastewater Treatment ◽

Small Communities ◽

Wastewater Treatment Systems

Download Full-text

Advancing Canadian Wastewater Assets (ACWA) bridges laboratory-scale testing of wastewater technologies and effects on receiving environments

Canadian Journal of Civil Engineering ◽

10.1139/cjce-2019-0449 ◽

2020 ◽

Vol 47 (8) ◽

pp. 998-1004

Author(s):

Leland J. Jackson

Keyword(s):

Wastewater Treatment ◽

Policy Development ◽

Emerging Contaminants ◽

Treatment Plant ◽

Physical Modelling ◽

Environment Effects ◽

Treatment Technologies ◽

Temporal And Spatial ◽

Technology Benefits ◽

Receiving Environments

Laboratory assessments of organism responses to wastewater are inexpensive, easily replicated, and offer control and precision, yet are often so reduced in temporal and spatial scale that results are difficult to apply to receiving environments. Whole-system experiments are expensive, lack true replication, and can be logistically challenging, yet offer the best insight as to how ecosystems will respond to effluent inputs. Advancing Canadian Wastewater Assets (ACWA), which includes a wastewater treatment plant, analytical labs, and research streams, provides unique infrastructure to test new wastewater treatment technologies, demonstrate technology benefits by direct analytical chemistry, and determine receiving environment effects. The ability to measure temperature, conservative ions, and dissolved oxygen in 12 replicated, naturalized streams allows physical modelling and biological monitoring consistent with larger, natural rivers. Assessments of receiving environment data could guide policy development for safe discharge of emerging contaminants and develop strategies to reduce development and persistence of antimicrobial resistance.

Download Full-text

Review of Wastewater Treatment Technologies for Application in Communities in the Amazonian Varzea

Scientific Magazine UAKARI ◽

10.31420/uakari.v7i1.85 ◽

2011 ◽

Vol 7 (1) ◽

pp. 59-69 ◽

Cited By ~ 3

Author(s):

João Paulo Borges Pedro ◽

Maria Cecília Rosinski Lima Gomes ◽

Ana Claudeíse Silva do Nascimento

Keyword(s):

Wastewater Treatment ◽

Treatment Technologies

Download Full-text

Use of chemical upgrading (CU) in Hungary and Slovakia

Water Science & Technology ◽

10.2166/wst.1994.0227 ◽

1994 ◽

Vol 30 (5) ◽

pp. 87-95 ◽

Cited By ~ 2

Author(s):

Susan E. Murcott ◽

Donald R. F. Harleman

Keyword(s):

Wastewater Treatment ◽

Biological Treatment ◽

Treatment Plant ◽

Domestic Sewage ◽

Metal Salts ◽

Plant Performance ◽

Eastern European ◽

Low Doses ◽

The Past ◽

Treatment Technologies

In the past decade, the development of polymers and new chemical technologies has opened the way to using low doses of chemicals in wastewater treatment. “Chemical upgrading” (CU) is defined in this paper as an application of these chemical technologies to upgrade overloaded treatment systems (typically consisting of conventional primary plus biological treatment) in Central and Eastern European (CEE) countries. Although some of the chemical treatment technologies are proven ones in North America, Scandinavia, and Germany, a host of factors, for example, the variations in composition and degree of pollution, the type of technologies in use, the type and mix of industrial and domestic sewage, and the amount of surface water, had meant that the viability of using CU in CEE countries was unknown. This report describes the first jar tests of CU conducted during the summer of 1993. The experiments show CU's ability to improve wastewater treatment plant performance and to potentially assist in the significant problem of overloaded treatment plants. Increased removal of BOD, TSS, and P in the primary stage of treatment is obtained at overflow rates above 1.5 m/h, using reasonably priced, local sources of metal salts in concentrations of 25 to 50 mg/l without polymers.

Download Full-text