Anaerobic–aerobic treatment of purified terephthalic acid (PTA) effluent; a techno-economic alternative to two-stage aerobic process

Pophali, Girish R.; Khan, Rana Rashad Mahmood Khan Rana Rashad Mahmood; Dhodapkar, Rita; Nandy, Tapas; Devotta, S.

doi:10.1016/j.jenvman.2006.11.016

Cited by 47 publications

(25 citation statements)

References 8 publications

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“…The wastewater is generated in the catalyst recovery section, during cleaning and washing; PTA scrubbing and from the distillate which produces acid water [4].…”

Section: Introductionmentioning

confidence: 99%

“…When the aluminum and iron salts are dissolved in water, the metal (M) ion hydrates and is hydrolyzed to form monomeric and polymeric species and solid precipitates: MOH 2+ , M(s) and M(OH)4 −[47]. The reduction of dissolved organics during coagulation with metal salts at different pH follows two different mechanisms, commonly referred to as charge neutralization and adsorption.…”

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confidence: 99%

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Pretreatment of petrochemical wastewater by coagulation and flocculation and the sludge characteristics

Verma

Prasad

Mishra

2010

Journal of Hazardous Materials

160

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“…The wastewater is generated in the catalyst recovery section, during cleaning and washing; PTA scrubbing and from the distillate which produces acid water [4].…”

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

Pretreatment of petrochemical wastewater by coagulation and flocculation and the sludge characteristics

Verma

Prasad

Mishra

2010

Journal of Hazardous Materials

160

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“…To overcome these obstacles, BP-Amoco has developed anaerobic treatment systems under mesophilic conditions (35 o C) and achieved over 80-85% reduction in COD in the late 1980s (Razo-Flores et al 2006). In further technological development, several types of anaerobic systems have been applied to treat PTA wastewaters, including anaerobic contact, down-flow stationary fixed film, internal circulation, anaerobic filter, up-flow anaerobic sludge blanket (UASB), and expanded granular sludge blanket (EGSB) (Feng et al 2012;Guyot et al 1990;Joung et al 2009;Kim et al 2012;Kleerebezem and Macarie 2003;Macarie 2000;Pereboom et al 2012;Pophali et al 2007;Stergar et al 2003;Veolia Water Solutions &Technologies 2012;Zhu et al 2010). In particular, granular sludge bed-type anaerobic systems, including UASB and EGSB, have been widely used ( Fig.…”

Section: Introductionmentioning

confidence: 99%

Microbial Community Involved in Anaerobic Purified Terephthalic Acid Treatment Process

Narihiro¹,

Nobu²,

Mei³

et al. 2015

Anaerobic Biotechnology

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Purified terephthalic acid is one of the most important petrochemical products for our modern life. From an environmental viewpoint, wastewater from the purified terephthalic acid production industry should be treated using effective technologies that guarantee the protection of human health and environmental safety. To do so, anaerobic biological wastewater treatment process is successfully applied for the treatment of purified terephthalic acid wastewater in the world. In the process, methanogenic microbial consortia are key players in the degradation of purified terephthalic acid-related compounds, such as terephthalic acid, p-toluic acid, and benzoate. To date, several studies have been conducted to understand microbial community structures in anaerobic purified terephthalic acid wastewater treating processes and to elucidate their physiology and ecological functions. This chapter will describe the current knowledge of the microbial community structures involved in the degradation of purified terephthalic acidrelated compounds in anaerobic wastewater treatment processes.

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“…The organic pollutants with benzene ring structure in wastewater are stable, so they are difficult to biodegradate [1]. The traditional treatment process is complicated and expensive, and always causes secondary pollution [2]. Therefore, it is crucial to develop a new method to eliminate organic pollutants in PTA wastewater.…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic Degradation of Organic Pollutants in Purified Terephthalic Acid Wastewater with Activated Carbon Supported Titanium Dioxide

Yuefeng

Wan

Mei

et al. 2009

2009 International Conference on Energy and Environment Technology

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Activated carbon (AC) supported titanium dioxide (TiO 2 ) photocatalyst (TiO 2 /AC) was prepared by two-step solgel process. Crystal structure, and surface morphology of TiO 2 /AC were characterized by X-ray diffraction (XRD), N 2 adsorption-desorption isotherm measurements (BET) and scanning electron microscopy (SEM), respectively. The results show that average crystal size of TiO 2 in 11% TiO 2 /AC catalyst is 17.6 nm and special surface area of AC carrier is 887.11 m 2 /g. The photocatalyst has highly developed microporous structure, improves the dispersion degree of TiO 2 , and decreases the size of aggregate. Meanwhile, TiO 2 /AC was applied to degradate organic pollutants in purified terephthalic acid (PTA) wastewater.The obtained optimum conditions of photocatalytic degradation are as follows: the mass amount of TiO 2 loaded on AC is 11 %, the usage amount of catalyst is 7 g/ L wastewater and reaction time is 7 h. Under the optimum conditions, the COD removal ratio of wastewater is up to 64.30 %.Keywords-TiO 2 /AC catalyst; photocatalytic degradation; purified terephthalic acid wastewater . INTRODUCTIONIn the production of PTA, large amount of organic wastewater is produced, which contains high concentration of various organic pollutants with wide range of pH value. PTA wastewater must be treated before discharge. The organic pollutants with benzene ring structure in wastewater are stable, so they are difficult to biodegradate [1]. The traditional treatment process is complicated and expensive, and always causes secondary pollution [2]. Therefore, it is crucial to develop a new method to eliminate organic pollutants in PTA wastewater. The effective and economical method is focused on the non-biodegradable treatment process.The study on the degradation of poisonous polychlorinated biphenyls with TiO 2 was carried out by Carey in 1976 [3], which marked the beginning of application and research of TiO 2 photocatalyst. However, TiO 2 particles are too small, which causes difficulties of catalyst recovery.In order to resolve the problem of catalyst loss, researchers supported TiO 2 particles on solid carrier [4][5][6][7][8]. Carbon as carrier was used to support TiO 2 by Mozia[4], * Corresponding author. and the preparede TiO 2 /carbon catalyst was put into the methylene solution for decoloring treatment. The results showed that the catalyst not only had good decoloring effect, but also could be recovered and recycled well. Recently, heterogeneous photocatalysts TiO 2 /AC have been applied in the degradation of organic pollutants in the dyeing wastewater [5], pesticides wastewater [6] et al, but there is little literacture about photocatalytic degradation of organic pollutants in PTA wastewater with TiO 2 /AC catalyst. In this paper, TiO 2 /AC catalyst was prepared by two-step sol-gel process [9], and characterized by XRD, BET and SEM. Then, the catalyst was applied to degradate organic pollutants in PTA wastewater, and the degradation effection was investigated. II. EXPERIMENTAL A. Preparation of TiO 2 /AC cat...

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Anaerobic–aerobic treatment of purified terephthalic acid (PTA) effluent; a techno-economic alternative to two-stage aerobic process

Cited by 47 publications

References 8 publications

Pretreatment of petrochemical wastewater by coagulation and flocculation and the sludge characteristics

Pretreatment of petrochemical wastewater by coagulation and flocculation and the sludge characteristics

Microbial Community Involved in Anaerobic Purified Terephthalic Acid Treatment Process

Photocatalytic Degradation of Organic Pollutants in Purified Terephthalic Acid Wastewater with Activated Carbon Supported Titanium Dioxide

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