A comparative study on treatment of wastewaters with various biodegradability and various pH values using single‐chamber microbial fuel cells

Nowadays, beneficial microorganisms are getting wider applicability. One example is referred to as Effective Microorganisms (EM) having its composition kept a secret. EM is a product in liquid form, which consists of a variety of not only effective and beneficial microorganisms but also nonpathogenic ones, with admirable coexistence between aerobic and anaerobic types of microorganisms. The aim of this narrative review is to provide a summary of the different uses and applications of EM, their applications, their benefits, and the expected results when using them in different applications. This is the first review to focus on the uses of EM in environmental engineering systems and processes such as wastewater treatment processes. Originally, EM was manufactured to be utilized in organic farming, but at the moment, this substance is getting wider applications such as in medicine, environment, livestock sector, forestry, and agriculture. When it comes to the protection of the environment, EM helps in waste deodorization, eutrophication control, and wastewater. Investigation on EM use in water quality restoration, wastewater treatment, the treatment of sludge, and composting has been undertaken by researchers. This review provides an overview of the current situation of environmental application of EM in various fields including water quality, wastewater treatment, sludge treatment, and composting.

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“…Biological processes are among the main processes used in wastewater treatment [5,38]. Wastewater treatment has also been done using EM.…”

Section: Bioremediation Of Wastewater Using Emmentioning

confidence: 99%

Environmental applications of Effective Microorganisms: a review of current knowledge and recommendations for future directions

Safwat

Matta

2021

J. Eng. Appl. Sci.

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“…Sustainability is now a global priority for every community, which has led researchers to consider using wastewater treatment plants as water resource recovery facilities (Safwat et al 2019c). Efforts have been made not only to reduce the energy required to treat industrial wastewater, but also to generate energy from wastewater that can be used to operate treatment plants.…”

Section: Introductionmentioning

confidence: 99%

“…Phenol is a pollutant which attracts great interest. Phenol is one of the organic compounds found in several types of industrial wastewater and can cause significant environmental damage (Safwat et al 2019c, a). Industries that generate phenol in wastewater effluent include oil refineries, pesticide manufacturing, petrochemicals, coke manufacturing, and others (Pradhan et al 2015;Elawwad et al 2016).…”

Section: Introductionmentioning

confidence: 99%

“…Most desalination plants perform their work in multiple stages, and these stages are based on the use of fossil fuels that increase greenhouse gas emissions (Zahid et al 2022a). It is therefore crucial to focus on other technologies that can achieve the same results while minimizing the high operating cost of conventional technologies (Elawwad and Hazem 2017;Safwat et al 2019c).…”

Section: Introductionmentioning

confidence: 99%

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Influence of co-substrate existence, temperature, pH, and salt concentration on phenol removal, desalination, and power generation using microbial desalination cells

Safwat

Meshref

Salama³

et al. 2022

Int. J. Environ. Sci. Technol.

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Microbial desalination cells (MDCs) exhibited an economical value with large promises as a useful desalination treatment solution. MDCs threefold applications to efficiently treat wastewater and to produce electricity and simultaneously accomplish desalination were investigated in this work. The study examined the influence of various performance parameters including co-substrate, temperature, pH, and salt concentrations on the response of three-chamber MDCs with respect to energy recovery and contaminant removal (Phenol). The system evaluation criteria encompassed chemical oxygen demand (COD), phenol removal efficiency, Coulombic efficiency, desalination efficiency, and other system parameters such as voltage generation and power density. The maximum COD and phenol removal efficiencies obtained at temperature = 37 °C, pH = 7, and salt concentration = 10,000 ppm, were 80% and 74%, respectively. The maximum Coulombic efficiency was 5.3% and was observed at temperature = 18 °C, pH = 7, and salt concentration = 10,000 ppm. The results show that the presence of a co-substrate improved power density; the maximum power density obtained was 52.9 mW/m2. The principal component analysis elucidated the impact of pH on COD and phenol removal rates. With our findings confirmed trends in the improvement of the voltage generation, COD and phenol removal efficiencies with the addition of a co-substrate, the temperature and pH increase.

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“…Wastewater treatment systems depend mainly on the biological action of different types of microorganisms, primarily bacteria, for removing dissolved and suspended organic matter (Schultz 2005;Ahmed et al 2013). Biological treatment processes can be principally divided into aerobic and anaerobic processes where they can be further subdivided into suspended-growth processes, attached-growth processes or a combination of both (Ahmed et al 2015;Safwat et al 2018). In suspended growth processes, the microorganisms responsible for treatment are maintained in suspension by appropriate mixing methods as in Activated sludge process (ASP), sequencing batch reactor (SBR), stabilization ponds and extended aeration systems.…”

Section: Introductionmentioning

confidence: 99%

Performance Evaluation of IFAS System Using Honeycomb PVC Media

2019

CER

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Recently, Egypt is facing serious problems caused by the deterioration of effluent quality of many wastewater treatment plants (WWTP) especially in rural areas. Unexpected rapid increase in population associated with the increase of organic loading are the main factors causing the failure in operation for many WWTPs. Absence of periodic maintenance and lack of operators' experience in these rural areas make the situation worse. Many WWTP are recently under rehabilitation and upgrading for the above reasons, however decision makers are facing a real challenge due to the space-limit in many cases. The integrated fixed film activated sludge (IFAS) system has recently proved to be an effective choice to expand the WWTP capacity for growing communities, enhance nitrogen removal and comply with more stringent effluent limits with small footprint. In this research, an IFAS pilot-scale reactor is constructed to optimize its application in upgrading conventional activated sludge (CAS) plants. The effect of carrier position, hydraulic retention time (HRT) and organic loading rate (OLR) on the biological treatment efficiency and nutrient removal compared to CAS process are studied. IFAS configurations with no media, vertical position and cross flow media position are tested with 4, 8 and 12 hours retention times and organic loading rates of 0.84 and 1.44 Kg COD/m 3 .day.

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A comparative study on treatment of wastewaters with various biodegradability and various pH values using single‐chamber microbial fuel cells

Cited by 10 publications

References 40 publications

Environmental applications of Effective Microorganisms: a review of current knowledge and recommendations for future directions

Environmental applications of Effective Microorganisms: a review of current knowledge and recommendations for future directions

Influence of co-substrate existence, temperature, pH, and salt concentration on phenol removal, desalination, and power generation using microbial desalination cells

Performance Evaluation of IFAS System Using Honeycomb PVC Media

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