Green technology in wastewater treatment technologies: Integration of membrane bioreactor with various wastewater treatment systems

Over the last few decades, the presence of micropollutants in the wastewater stream is imposing a serious concern worldwide. Membrane bioreactor (MBR) technology has been widely employed for the treatment of wastewater contaminated with micropollutants. Hence, the aim of this paper is to provide a consolidate review on the present state of research and advancement in MBR technology along with its augmentation with other wastewater treatment technologies for micropollutant removal, sustainability, and operating cost assessment for its feasibility. The potential application of MBR and hybrid-MBR systems in micropollutant removal along with the fate, removal mechanism, various factors affecting the MBR system efficiency and the operational cost involved were also been discussed in detail. Further, based on the available technologies on MBR, the authors discussed the future research perspective for micropollutant removal from the effluent stream with an objective of the circular economy.

Membrane bioreactor and integrated membrane bioreactor systems for micropollutant removal from wastewater: A review

The work presented here is based on a review of 55 DFID-financed RNFE and livelihood diversification projects, programmes and research comprising rural household survey and other field-related research projects representing a broad range of methodologies borrowed from economics, sociology and social anthropology.

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The rural non-farm economy, livelihoods and their diversification: issues and options

In many studies worldwide the use of treated sewage effluents (TSE) as water and nutrient sources in agricultural irrigation have been introduced as a viable alternative for wastewater destination in the environment. Considering agronomic and environmental aspects the objectives of this review were: (i) to present an overview of TSE irrigation on different agro-systems (annual crops, orchards, forests and forages); and (ii) to show the principal changes on chemical, physical and microbiological soil characteristics after TSE application. Various studies have revealed that the nutrient supply only by TSE irrigation was not sufficient to meet plant nutrient requirements resulting in yield decreases. The problem could be solved by an adapted effluent/fertilizer management. Moreover, TSE could generally substitute efficiently freshwater for irrigation. Regarding soil quality conditions, TSE irrigation affected mainly: (i) total soil carbon and nitrogen, and mineral nitrogen in soil solution; (ii) microbial activity, composition of microbial communities and their function; (iii) exchangeable calcium and magnesium; (iv) salinity, sodicity, clay dispersion and hydraulic conductivity. Other soil parameters considered in this review (e.g. heavy metals) did not present significant changes over short and medium terms. Due to the often observed accumulation of sodium and nitrogen losses (leaching, volatilization and denitrification) after TSE irrigation, the monitoring of these components is of crucial importance for a sustainable use. Finally, further studies on the technical-economical-environmental viability of TSE irrigation are required to establish reliable recommendations for TSE use particularly in Brazilian agro-systems.

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Agricultural use of treated sewage effluents: agronomic and environmental implications and perspectives for brazil

Aquatic natural organic matter (NOM) is a heterogeneous mixture of biopolymers and their degradation products that cause harmful by-products during drinking water production. The great variability ...

Natural Organic Matter Removal from Drinking Water by Membrane Technology

In this work it is presented a comparative evaluation for ultrafiltration, conventional, and conventional with activated carbon water treatment systems, considering direct capital and operational costs, based on the results of an ultrafiltration pilot unit, installed at the Guarapirangas Reservoir In order to compare the costs it was considered Total Organic Carbon removal efficiency Cost evaluation was performed based on the pay back method, resulting in a value of R$ 020/m3 for conventional water treatment system, and R$ 040/m3 for the others These results clearly demonstrate the high potential of membrane separation technology for drinking water treatment

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Tratamento de água para abastecimento público por ultrafiltração: avaliação comparativa através dos custos diretos de implantação e operação com os sistemas convencional e convencional com carvão ativado

Water reuse potential at heavy-duty vehicles washing facilities: the mass balance approach for conservative contaminants

Treatment technology for wastewater treatment and reuse encompasses a vast number of options, and the Submerged Membrane Bioreactor is regarded as a key element for the role it can play in water reuse schemes. Thus, this study aimed to present and discuss the current status of sMBR implementation, as well as to present the results of a pilot plant with submerged flat sheet membranes treating wastewater from the residence halls and the restaurant of the University of Sao Paulo. The pilot plant was operated under stationary conditions over a period of 90 days with a concentration of 3422 ± 693 mg TSS/L. The results showed that the system can produce an effluent with low concentrations of color, turbidity,

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Biorreatores com membranas submersas (BRMs): alternativa promissora para o tratamento de esgotos sanitários para reúso

Relatório nacional sobre o gerenciamento da água no brasil

Este estudo teve como objetivo avaliar o potencial de reuso de agua na lavagem de caminhoes a partir do efluente tratado por um Contator Biologico Rotativo operado em escala real Para avaliacao do potencial de reuso foi realizado um balanco de massa para o sistema de reuso levando em consideracao a concentracao de Solidos Dissolvidos Totais como contaminante critico O sistema de tratamento produziu um efluente com concentracoes medias de cor, turbidez, SDT e DBO5 de 45 ± 14 uC, 15 ± 6,0 NTU, 244 ± 99 mg SDT/L e 14 ± 7,3 mg O2/L, respectivamente Com base no balanco de massa e considerando o valor de SDT estabelecido na NBR 13696, caso nao fosse adotado o enxague final com agua limpa, o potencial de reuso seria de 40% No entanto, adotando-se 30% do enxague final com agua limpa, seria possivel reutilizar ate 70% do efluente tratado sem comprometer o desempenho da lavagem dos caminhoes A adocao do sistema de reuso possibilitaria uma reducao de R$ 2590,75/mes no custo operacional do lava-rapido

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Ivanildo Hespanhol

Papers

Tratamento de água para abastecimento público por ultrafiltração: avaliação comparativa através dos custos diretos de implantação e operação com os sistemas convencional e convencional com carvão ativado

Water reuse potential at heavy-duty vehicles washing facilities: the mass balance approach for conservative contaminants

Biorreatores com membranas submersas (BRMs): alternativa promissora para o tratamento de esgotos sanitários para reúso

Relatório nacional sobre o gerenciamento da água no brasil

Potencial de reúso de água na lavagem de caminhões utilizando Contator Biológico Rotativo