Anaerobic treatment of a chemical synthesis-based pharmaceutical wastewater in a hybrid upflow anaerobic sludge blanket reactor

Öktem, Y.; İnce, Orhan; Sallis, Paul J.; Donnelly, Tom; İnce, Bahar

doi:10.1016/j.biortech.2007.02.036

Cited by 142 publications

(55 citation statements)

References 19 publications

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“…A variation in COD removal efficiency of less than 10% over a period of at least three HRTs was considered to indicate that the system had reached a pseudo steady state. [18] The results indicate that at an HRT of 8 h the total COD removal efficiency was 84% and 72% respectively for MUASB and UASB. The average effluent COD concentrations were 30 and 53 mg L −1 (Fig.…”

Section: Performance Of Reactors During the Treatment Of Municipal Sementioning

confidence: 92%

Improvement in biomass characteristics and degradation efficiency in modified UASB reactor treating municipal sewage: a comparative study with UASB reactor

Das

2009

Asia-Pacific J Chem Eng

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Low strength wastewaters (LSWs) are difficult to degrade efficiently in the upflow anaerobic sludge blanket (UASB) reactor. The possible reasons for poor treatment of LSWs in UASB are: (i) low mixing due to low biogas production (ii) frequent biomass washout at higher hydraulic loading rate due to low settleability of biomass. In the present study, lab scale UASB reactor and modified upflow anaerobic sludge blanket (MUASB) reactor were operated with municipal sewage containing chemical oxygen demand (COD) in range of 180-210 mg L −1 as LSW at three different hydraulic retention times (HRTs) of 8, 6, and 4 h. The changes in the biomass characteristics as well as degradation efficiency were compared with respect to time. During this operation, samples of biomass were taken from both reactors to measure total suspended solids (TSS), settling velocity, granular size and specific methanogenic activity (SMA). The overall COD removal in MUASB reactor was higher compared to UASB (84 and 67% respectively). After 150 days of operation, the settling velocity and SMA of MUASB biomass increased, but no significant change in settling velocity and SMA of UASB biomass was observed. The study shows that MUASB could be preferred over UASB for the treatment of municipal sewage as LSW. 

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Section: Performance Of Reactors During the Treatment Of Municipal Sementioning

confidence: 92%

Improvement in biomass characteristics and degradation efficiency in modified UASB reactor treating municipal sewage: a comparative study with UASB reactor

Das

2009

Asia-Pacific J Chem Eng

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“…The strain shows the potential to improve the treatment process and may also be harvested and find use as SCP after further investigation. Oktem et al (2007) analysed the chemical synthesisbased pharmaceutical wastewater before anaerobic treatment and observed COD value 40,000-60,000 mg/l, total kjeldahl nitrogen 800-900 mg/l, phosphate 3-6 mg/l, volatile suspended solids 0.6-0.7 mg/l, alkalinity 900-1,000 mg/ l and pH value 7-8.…”

Section: Characteristics Of Pharmaceutical Industries' Wastewatermentioning

confidence: 99%

“…UASB reactor is effective in the treatment of industrial wastewater in psychrophile conditions. Some researchers have utilized a hybrid UASB reactor for the treatment of chemical synthesis-based pharmaceutical wastewater (Oktem et al 2007). …”

Section: Upflow Anaerobic Sludge Blanket (Uasb) Reactorsmentioning

confidence: 99%

A review on characterization and bioremediation of pharmaceutical industries’ wastewater: an Indian perspective

Rana¹,

Singh²,

Kandari³

et al. 2014

Appl Water Sci

156

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During the past few decades, pharmaceutical industries have registered a quantum jump contributing to high economic growth, but simultaneously it has also given rise to severe environmental pollution. Untreated or allegedly treated pharmaceutical industrial wastewater (PIWW) creates a need for time to time assessment and characterization of discharged wastewater as per the standards provided by the regulatory authorities. To control environmental pollution, pharmaceutical industries use different treatment plans to treat and reuse wastewater. The characterization of PIWW using advanced and coupled techniques has progressed to a much advanced level, but in view of new developments in drug manufacture for emerging diseases and the complexities associated with them, better sophisticated instrumentation and methods of treatment are warranted. The bioremediation process to treat PIWW has undergone more intense investigation in recent decade. This results in the complete mineralization of pharmaceutical industries' wastewater and no waste product is obtained. Moreover, high efficiency and low operation cost prove it to be an effective tool for the treatment of PIWW. The present review focuses on the characterization as well as bioremediation aspects of PIWW.

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“…With different treatment processes, the COD removal efficiency was different. [4][5][6] Biological treatment was also applied to improve the treatability of the pharmaceutical wastewater at the sources.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Thiamine-Modified Bentonite for Pretreatment of Pharmaceutical Wastewater

2015

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A series of sodium bentonite and thiamine were used as raw materials to prepare a new adsorbent -thiamine-modified bentonite. The adsorbent was applied in the pretreatment of pharmaceutical wastewater. The optimum preparation conditions of thiamine-modified bentonite were studied. The experiments showed that the removals of COD (chemical oxygen demand) reached 47.98 % under optimal condition. The FTIR results indicated that bentonite has been modified by thiamine. The X-ray diffraction result showed that the interplanar distance of modified bentonite was increased by intercalating thiamine. From the analyses of the SEM photographs, it can be clearly observed that the bentonite, after thiamine insertion reaction, loses its foliated structure and exhibits a rougher surface. Among several isotherm equations, Langmuir and Freundlich adsorption isotherms were investigated. They were widely used to describe equilibrium data for water and wastewater treatment applications. Adsorption isotherms correlate well with the Langmuir isotherm model. Detailed isothermal and kinetic studies show that the modified bentonite removes organic pollutants from pharmaceutical wastewater by physical adsorption processes.

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Anaerobic treatment of a chemical synthesis-based pharmaceutical wastewater in a hybrid upflow anaerobic sludge blanket reactor

Cited by 142 publications

References 19 publications

Improvement in biomass characteristics and degradation efficiency in modified UASB reactor treating municipal sewage: a comparative study with UASB reactor

Improvement in biomass characteristics and degradation efficiency in modified UASB reactor treating municipal sewage: a comparative study with UASB reactor

A review on characterization and bioremediation of pharmaceutical industries’ wastewater: an Indian perspective

Synthesis of Thiamine-Modified Bentonite for Pretreatment of Pharmaceutical Wastewater

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