Study of moving bed biofilm reactor in diethyl phthalate and diallyl phthalate removal from synthetic wastewater

Ahmadi, Ehsan; Gholami, Mitra; Farzadkia, Mahdi; Nabizadeh, Ramin; Azari, Ali

doi:10.1016/j.biortech.2015.01.122

Cited by 90 publications

(51 citation statements)

References 30 publications

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“…MBBR systems are continual flow processes that are easy to control and operate. The advantages of MBBR systems are that (1) biofilm technology does not require backwashing and, consequently, skilled operators are not required, (2) the system can be readily upgraded to meet increases in production by increasing the number of biocarriers in the existing tank, (3) the technology responds very well to toxicity spikes, system upsets, and frequent or irregular changes in loading rate, and (4) the system requires a small footprint with an easy installation and low sludge production at approximately 10 % of conventional treatment technologies ( Van den Akker et al 2011;Zhang et al 2009;Yu et al 2007;Chu et al 2011;Karizmeh et al 2014;Almomani et al 2014;Ahmadi et al 2015). In addition to MBBR, other biofilm processes have been used to remove NH 4 ?…”

Section: Introductionmentioning

confidence: 99%

Treatment of septic tank effluent using moving-bed biological reactor: kinetic and biofilm morphology

Almomani

Khraisheh

2016

Int. J. Environ. Sci. Technol.

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Septic tanks are very commonly used wastewater collection systems throughout the world, and especially in rural areas. In this study, the use of moving-bed biological reactors (MBBR) for the treatment of septic tank effluent (STE) was examined. The study was conducted in two phases. In Phase I, the performance of septic tanks from four projects working under different operational conditions and with different service lives was followed to determine the parameters that required further treatment. In Phase II, four specially designed continuous flow pilotplant MBBRs and one laboratory-scale batch reactor were tested for their efficiency in treating STE. Experiments were carried out at various temperatures (8-25°C) and with different hydraulic retention times (HRTs). MBBR effectively reduced STE's nutrients and chemical oxygen demand by 90 and 85 %, respectively, over 180 days of operation. The average ammonia removal rate at 25°C increased from 0.279 to 0.540 kg N/m 3 when the reactor HRT changed from 5.7 to 13.3 h. Under these conditions, the ammonia removal kinetics were successfully correlated with a theta model with an average h value of 1.054. The biofilm morphology showed a stable and global biomass coverage ([70 %) and a high percentage of live cells. A thinner biofilm was observed when the MBBR operated at high temperatures. The results of this study showed that MBBR is a promising technology for post-treatment of septic tank effluent.

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Section: Introductionmentioning

confidence: 99%

Treatment of septic tank effluent using moving-bed biological reactor: kinetic and biofilm morphology

Almomani

Khraisheh

2016

Int. J. Environ. Sci. Technol.

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“…One of these emerging synthetic compounds is phthalic acid esters (PAEs), commonly named phthalates [8], which are widely used as plasticizers [9, 10] and globally applied in large quantities to make products such as plastics, pesticides, adhesives, paints, and cosmetics [11–13]. PAEs are ubiquitous pollutants as they have extensive applications in industrial processes, are not chemically bonded to products, and can migrate to environments [6, 14].…”

Section: Introductionmentioning

confidence: 99%

“…In recent years, PAEs have been considered as hazardous environmental pollutants [8]. They can have carcinogenic, mutagenic, and teratogenic potential impacts due to their ability to disrupt endocrine function [15–17].…”

Section: Introductionmentioning

confidence: 99%

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A comparative study of anaerobic fixed film baffled reactor and up-flow anaerobic fixed film fixed bed reactor for biological removal of diethyl phthalate from wastewater: a performance, kinetic, biogas, and metabolic pathway study

Yousefzadeh

Ahmadi

Gholami

et al. 2017

Biotechnol Biofuels

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BackgroundPhthalic acid esters, including diethyl phthalate (DEP), which are considered as top-priority and hazardous pollutants, have received significant attention over the last decades. It is vital for industries to select the best treatment technology, especially when the DEP concentration in wastewater is high. Meanwhile, anaerobic biofilm-based reactors are considered as a promising option. Therefore, in the present study, for the biological removal of DEP from synthetic wastewater, two different anaerobic biofilm-based reactors, including anaerobic fixed film baffled reactor (AnFFBR) and up-flow anaerobic fixed film fixed bed reactor (UAnFFFBR), were compared from kinetic and performance standpoints. As in the previous studies, only the kinetic coefficients have been calculated and the relationship between kinetic coefficients and their interpretation has not been evaluated, the other aim of the present study was to fill this research gap.ResultsIn optimum conditions, 90.31 and 86.91% of COD as well as 91.11 and 88.72% of DEP removal were achieved for the AnFFBR and UAnFFFBR, respectively. According to kinetic coefficients (except biomass yield), the AnFFBR had better performance as it provided a more favorable condition for microbial growth. The Grau model was selected as the best mathematical model for designing and predicting the bioreactors’ performance due to its high coefficients of determination (0.97 < R 2). With regard to the insignificant variations of the calculated Grau kinetic coefficients (K G) when the organic loading rate (with constant HRT) increased, it can be concluded that both of the bioreactors can tolerate high organic loading rate and their performance is not affected by the applied DEP concentrations.ConclusionsBoth the bioreactors were capable of treating low-to-high strength DEP wastewater; however, according to the experimental results and obtained kinetic coefficients, the AnFFBR indicated higher performance. Although the AnFFBR can be considered as a safer treatment option than the UAnFFFBR due to its lower DEP concentrations in sludge, the UAnFFFBR had lower VSS/TSS ratio and sludge yield, which could make it more practical for digestion. Finally, both the bioreactors showed considerable methane yield; however, compared to the UAnFFFBR, the AnFFBR had more potential for bioenergy production. Although both the selected bioreactors achieved nearly 90% of DEP removal, they can only be considered as pre-treatment methods according to the standard regulations and should be coupled with further technology.Electronic supplementary materialThe online version of this article (doi:10.1186/s13068-017-0826-9) contains supplementary material, which is available to authorized users.

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“…In the past few years, previous studies have demonstrated that several PAEs can take the biodegradation under aerobic conditions and anaerobic conditions101112131415, in activated sludge1617 and in acclimated sludge18192021. In order to clearly investigate the degradation mechanism and behavior of DMP in the treatment system, various mathematical models are proposed to describe the degradation and behavior of DMP.…”

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confidence: 99%

A New Efficient Hybrid Intelligent Model for Biodegradation Process of DMP with Fuzzy Wavelet Neural Networks

Huang

Zhang

Ruan

et al. 2017

Sci Rep

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A new efficient hybrid intelligent approach based on fuzzy wavelet neural network (FWNN) was proposed for effectively modeling and simulating biodegradation process of Dimethyl phthalate (DMP) in an anaerobic/anoxic/oxic (AAO) wastewater treatment process. With the self learning and memory abilities of neural networks (NN), handling uncertainty capacity of fuzzy logic (FL), analyzing local details superiority of wavelet transform (WT) and global search of genetic algorithm (GA), the proposed hybrid intelligent model can extract the dynamic behavior and complex interrelationships from various water quality variables. For finding the optimal values for parameters of the proposed FWNN, a hybrid learning algorithm integrating an improved genetic optimization and gradient descent algorithm is employed. The results show, compared with NN model (optimized by GA) and kinetic model, the proposed FWNN model have the quicker convergence speed, the higher prediction performance, and smaller RMSE (0.080), MSE (0.0064), MAPE (1.8158) and higher R2 (0.9851) values. which illustrates FWNN model simulates effluent DMP more accurately than the mechanism model.

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Study of moving bed biofilm reactor in diethyl phthalate and diallyl phthalate removal from synthetic wastewater

Cited by 90 publications

References 30 publications

Treatment of septic tank effluent using moving-bed biological reactor: kinetic and biofilm morphology

Treatment of septic tank effluent using moving-bed biological reactor: kinetic and biofilm morphology

A comparative study of anaerobic fixed film baffled reactor and up-flow anaerobic fixed film fixed bed reactor for biological removal of diethyl phthalate from wastewater: a performance, kinetic, biogas, and metabolic pathway study

A New Efficient Hybrid Intelligent Model for Biodegradation Process of DMP with Fuzzy Wavelet Neural Networks

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