Towards sustainable and energy efficient municipal wastewater treatment by up-concentration of organics

Güven, Hüseyin; Dereli, Recep Kaan; Özgün, Hale; Erşahin, Mustafa Evren; Öztürk, İzzet

doi:10.1016/j.pecs.2018.10.002

Cited by 118 publications

(66 citation statements)

References 166 publications

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“…The influent acidification had been occurred that consolidated with the PWW's low pH quality of around 5.0 brought about a low influent pH for 5.6. The influent pH and VFA values were well-matched with the individuals studied previously [14]. Operation 2 continued for 30 days that indicates four maintenance periods for both digesters.…”

Section: Resultssupporting

confidence: 63%

Improvement of Methane Yield by Anaerobic Co-Digestion of Sewage and Petrochemical Wastewater: Effect of Temperature

Siddique

Ahmad

2019

Asian J. Chem.

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Anaerobic bio-digestibility of blend municipal sewage sludge (MSS), condensed waste activated sludge (CWAS) and petrochemical wastewater (PWW) has been evaluated utilizing semi-continuous operation, anaerobic reactors worked during mesophilic (37 ºC) and thermophilic (55 ºC) states. Supplementation of a significant PWW portion (49 % of VS) in an MSS + CWAS combination brought about 2.94 times more methane production, 153 versus 450 mL/g volatile solids (VS) under 37 ºC furthermore 2.59 times more methane production, 198 versus 513 mL/g VS under 55 ºC. The supplemented PWW portion might have been not inhibitory for the system. Those effects of this work show the profit from municipal sewage sludge, condensed waste activated sludge and petrochemical wastewater co-digestion.

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Section: Resultssupporting

confidence: 63%

Improvement of Methane Yield by Anaerobic Co-Digestion of Sewage and Petrochemical Wastewater: Effect of Temperature

Siddique

Ahmad

2019

Asian J. Chem.

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“…Water pollution and low investment in wastewater treatment (WWT) in developing countries results in a high risks for human health and ecosystems [1,2]. This condition creates the obligation to find both economic and ecological alternatives for WWT based on the needs of these regions, located mostly in tropical and inter tropical areas with little attention to such water problem [3,4]. Constructed wetlands (CWs) are a sustainable option to treat wastewater.…”

Section: Introductionmentioning

confidence: 99%

Effects of Ornamental Plant Density and Mineral/Plastic Media on the Removal of Domestic Wastewater Pollutants by Home Wetlands Technology

et al. 2020

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Wastewater treatment (WWT) is a priority around the world; conventional treatments are not widely used in rural areas owing to the high operating and maintenance costs. In Mexico, for instance, only 40% of wastewater is treated. One sustainable option for WWT is through the use of constructed wetlands (CWs) technology, which may remove pollutants using cells filled with porous material and vegetation that works as a natural filter. Knowing the optimal material and density of plants used per square meter in CWs would allow improving their WWT effect. In this study, the effect of material media (plastic/mineral) and plant density on the removal of organic/inorganic pollutants was evaluated. Low (three plants), medium (six plants) and high (nine plants) densities were compared in a surface area of 0.3 m2 of ornamental plants (Alpinia purpurata, Canna hybrids and Hedychium coronarium) used in polycultures at the mesocosm level of household wetlands, planted on the two different substrates. Regarding the removal of contaminants, no significant differences were found between substrates (p ≥ 0.05), indicating the use of plastic residues (reusable) is an economical option compared to typical mineral materials. However, differences (p = 0.001) in removal of pollutants were found between different plant densities. For both substrates, the high density planted CWs were able to remove COD in a range of 86–90%, PO4-P 22–33%, NH4-N in 84–90%, NO3-N 25–28% and NO2-N 38–42%. At medium density, removals of 79–81%, 26–32, 80–82%, 24–26%, and 39–41%, were observed, whereas in CWs with low density, the detected removals were 65–68%, 20–26%, 79–80%, 24–26% and 31–40%, respectively. These results revealed that higher COD and ammonia were removed at high plant density than at medium or low densities. Other pollutants were removed similarly in all plant densities (22–42%), indicating the necessity of hybrid CWs to increase the elimination of PO4-P, NO3-N and NO2-N. Moreover, high density favored 10 to 20% more the removal of pollutants than other plant densities. In addition, in cells with high density of plants and smaller planting distance, the development of new plant shoots was limited. Thus, it is suggested that the appropriate distance for this type of polyculture plants should be from 40 to 50 cm in expansion to real-scale systems in order to take advantage of the harvesting of species in these and allow species of greater foliage, favoring its growth and new shoots with the appropriate distance to compensate, in the short time, the removal of nutrients.

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“…In particular, the high energy consumption in wastewater treatment plants is mainly due to their heavy mechanical systems, such as pumps and aeration systems, for moving and treating wastewater [4]. Therefore, due to the high energy consumption of the wastewater treatments plants, more sustainable and energy-efficient treatments have been developed [5]. For example the production of biological energy by-products, such as biogas or biomethane, is obtained by the conversion of wastewater into a stabilised waste [6].…”

Section: Introductionmentioning

confidence: 99%

Wastewater Treatment Plant: Modelling and Validation of an Activated Sludge Process

et al. 2020

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The aim of the present paper is to develop a reliable and accurate model of the wastewater biochemical treatment process and to explore the behaviour through a general dynamic simulation environment, namely the INtegrated Simulation Environment Language (INSEL), for the analysis of the energy demand of the whole wastewater treatment plant. In particular, the presented model pays special attention to the chemical kinetics involved in the activated sludge process for the reduction of nitrogen and carbon compounds. According to the best practices, the plant configuration considered in this work includes the denitrification-nitrification process, performed by completely mixed reactors. In particular, the process analysed in this paper is based on the Ludzak-Ettinger process. The biological process is simulated according to the well-known method widely used in the literature, namely the Activated Sludge Model No 1 (ASM1). The model includes a set of equations for the calculation of aerobic growth of heterotrophs, anoxic growth of heterotrophs, aerobic growth of autotrophs, decay of autotrophs, ammonification of soluble nitrogen, hydrolysis of entrapped organics, and hydrolysis of entrapped organic nitrogen. All these equations, along with energy and mass balances, are solved by the explicit Euler method. The developed model is validated using literature data, showing a great accuracy (deviation below 1%). As for the temperature, results show that, between 15 and 25 °C, in the initial part of the process, transport effects dominate the consumption ones. When the temperature is higher than 30 °C, nitrate consumption is so fast that biomass growth is limited by this effect. Conversely, in case of low temperatures (5–10 °C), biomass growth is not limited by nitrate availability. Finally, results also showed that temperature significantly affects the denitrification process, whereas the effect on the oxygen is lower.

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Towards sustainable and energy efficient municipal wastewater treatment by up-concentration of organics

Cited by 118 publications

References 166 publications

Improvement of Methane Yield by Anaerobic Co-Digestion of Sewage and Petrochemical Wastewater: Effect of Temperature

Improvement of Methane Yield by Anaerobic Co-Digestion of Sewage and Petrochemical Wastewater: Effect of Temperature

Effects of Ornamental Plant Density and Mineral/Plastic Media on the Removal of Domestic Wastewater Pollutants by Home Wetlands Technology

Wastewater Treatment Plant: Modelling and Validation of an Activated Sludge Process

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