Treatment and enhanced degradation of petrochemical wastewater by continuous stirred tank reactor

Treatment and enhanced degradation of petrochemical wastewater by continuous stirred tank reactor

Currently, the world is facing two coexisting problems-1) the proper management of wastes generating from the industrial sectors, and 2) the scarcity for novel resources of gasoline to meet up energy demand of civilization. Anaerobic codigestion, a sustainable green technology presents an outstandin...

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Main Author: Siddique, Md. Nurul Islam
Format: Thesis
Language:English
Published: 2012
Subjects:
TD Environmental technology. Sanitary engineering
Online Access:http://umpir.ump.edu.my/id/eprint/3657/
http://umpir.ump.edu.my/id/eprint/3657/
http://umpir.ump.edu.my/id/eprint/3657/1/CD6305_NURUL_ISLAM_SIDDIQ.pdf
id ump-3657
recordtype eprints
spelling ump-36572017-08-14T08:15:59Z http://umpir.ump.edu.my/id/eprint/3657/ Treatment and enhanced degradation of petrochemical wastewater by continuous stirred tank reactor Siddique, Md. Nurul Islam TD Environmental technology. Sanitary engineering Currently, the world is facing two coexisting problems-1) the proper management of wastes generating from the industrial sectors, and 2) the scarcity for novel resources of gasoline to meet up energy demand of civilization. Anaerobic codigestion, a sustainable green technology presents an outstanding opportunity both for energy conversion and pollution control. It has a wide variety of applications treating numerous wastewaters such as agro-agricultural, industrial, municipal, domestic sewage etc. Therefore, it has become a core method with meticulous attraction treating organic wastes on account of its economic benefits of energy generation. The continuous stirred tank reactor (CSTR) can be defined as a sealed-tank digester equipped with mixing facility. Chemical pretreatment coupled with anaerobic co-digestion technology was applied on petrochemical wastewater using CSTR focusing on enhanced hydrolysis and methanogenesis. Particularly, batch experiments were performed, with applied H2O2 doses of 0.5, 1 and 1.5% for contact times of 5, 10 and 15 min. Results revealed that 1% H2O2 dose (1.0mM Fe3+2) for 5 min exposure elevated biodegradability index (BOD/COD) up to 35%. Catalase activity scavenged the toxicity on microbes. Subsequently, batch experiments were employed, with various mixing proportions of petrochemical wastewater (PWW): dairy cattle manure (DCM): beef cattle manure (BCM), such as 25: 37: 38, 40: 30: 30, 50: 25: 25, 60: 20: 20, and 75: 12: 13. Results revealed that PWW: DCM: BCM ratio (50: 25: 25) provided maximum methane production. Hence, CSTR was operated with this specific feed ratio. Effect of temperature and organic loading was also verified. Batch test operation was also performed for ammonium bicarbonate (NH4HCO) dosing avoiding volatile fatty acid (VFA) accumulation. Specific dosing limit was selected up to 40 mg/L. A 10 mg/L of NH4HCO3 3 dosing was proved suitable. Although methane production is considered to get introverted by VFA accumulation leading to reactor instability during anaerobic digestion, the co-digestion of PWW together with BCM and DCM caused 50% enhancement in methane production, followed by a 98±0.5% reduction in chemical oxygen demand at 10 days hydraulic retention time. No VFA buildup was identified, demonstrating that reactors were not running at stress-overloading situations. In comparison with the digestion of PWW alone, methane yield increased by 50–60% under mesophilic conditions and 50–65% under thermophilic conditions due to codigestion. This was induced by an optimum C: N ratio (30:1) of the feed stock ensuring microbial growth and buffering capacity. This study provides guidelines for kinetic analysis of the viability of transforming PWW to bioenergy. 2012-09 Thesis NonPeerReviewed application/pdf en http://umpir.ump.edu.my/id/eprint/3657/1/CD6305_NURUL_ISLAM_SIDDIQ.pdf Siddique, Md. Nurul Islam (2012) Treatment and enhanced degradation of petrochemical wastewater by continuous stirred tank reactor. Masters thesis, Universiti Malaysia Pahang. http://iportal.ump.edu.my/lib/item?id=chamo:67528&theme=UMP2
repository_type Digital Repository
institution_category Local University
institution Universiti Malaysia Pahang
building UMP Institutional Repository
collection Online Access
language English
topic TD Environmental technology. Sanitary engineering
spellingShingle TD Environmental technology. Sanitary engineering
Siddique, Md. Nurul Islam
Treatment and enhanced degradation of petrochemical wastewater by continuous stirred tank reactor
description Currently, the world is facing two coexisting problems-1) the proper management of wastes generating from the industrial sectors, and 2) the scarcity for novel resources of gasoline to meet up energy demand of civilization. Anaerobic codigestion, a sustainable green technology presents an outstanding opportunity both for energy conversion and pollution control. It has a wide variety of applications treating numerous wastewaters such as agro-agricultural, industrial, municipal, domestic sewage etc. Therefore, it has become a core method with meticulous attraction treating organic wastes on account of its economic benefits of energy generation. The continuous stirred tank reactor (CSTR) can be defined as a sealed-tank digester equipped with mixing facility. Chemical pretreatment coupled with anaerobic co-digestion technology was applied on petrochemical wastewater using CSTR focusing on enhanced hydrolysis and methanogenesis. Particularly, batch experiments were performed, with applied H2O2 doses of 0.5, 1 and 1.5% for contact times of 5, 10 and 15 min. Results revealed that 1% H2O2 dose (1.0mM Fe3+2) for 5 min exposure elevated biodegradability index (BOD/COD) up to 35%. Catalase activity scavenged the toxicity on microbes. Subsequently, batch experiments were employed, with various mixing proportions of petrochemical wastewater (PWW): dairy cattle manure (DCM): beef cattle manure (BCM), such as 25: 37: 38, 40: 30: 30, 50: 25: 25, 60: 20: 20, and 75: 12: 13. Results revealed that PWW: DCM: BCM ratio (50: 25: 25) provided maximum methane production. Hence, CSTR was operated with this specific feed ratio. Effect of temperature and organic loading was also verified. Batch test operation was also performed for ammonium bicarbonate (NH4HCO) dosing avoiding volatile fatty acid (VFA) accumulation. Specific dosing limit was selected up to 40 mg/L. A 10 mg/L of NH4HCO3 3 dosing was proved suitable. Although methane production is considered to get introverted by VFA accumulation leading to reactor instability during anaerobic digestion, the co-digestion of PWW together with BCM and DCM caused 50% enhancement in methane production, followed by a 98±0.5% reduction in chemical oxygen demand at 10 days hydraulic retention time. No VFA buildup was identified, demonstrating that reactors were not running at stress-overloading situations. In comparison with the digestion of PWW alone, methane yield increased by 50–60% under mesophilic conditions and 50–65% under thermophilic conditions due to codigestion. This was induced by an optimum C: N ratio (30:1) of the feed stock ensuring microbial growth and buffering capacity. This study provides guidelines for kinetic analysis of the viability of transforming PWW to bioenergy.
format Thesis
author Siddique, Md. Nurul Islam
author_facet Siddique, Md. Nurul Islam
author_sort Siddique, Md. Nurul Islam
title Treatment and enhanced degradation of petrochemical wastewater by continuous stirred tank reactor
title_short Treatment and enhanced degradation of petrochemical wastewater by continuous stirred tank reactor
title_full Treatment and enhanced degradation of petrochemical wastewater by continuous stirred tank reactor
title_fullStr Treatment and enhanced degradation of petrochemical wastewater by continuous stirred tank reactor
title_full_unstemmed Treatment and enhanced degradation of petrochemical wastewater by continuous stirred tank reactor
title_sort treatment and enhanced degradation of petrochemical wastewater by continuous stirred tank reactor
publishDate 2012
url http://umpir.ump.edu.my/id/eprint/3657/
http://umpir.ump.edu.my/id/eprint/3657/
http://umpir.ump.edu.my/id/eprint/3657/1/CD6305_NURUL_ISLAM_SIDDIQ.pdf
first_indexed 2023-09-18T21:58:03Z
last_indexed 2023-09-18T21:58:03Z
_version_ 1777414212181557248

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