Co-digestion of petrochemical wastewater with activated manure in continuous stirred tank reactor for methane production

The combined challenges of environmental crisis and declining fossil fuel supplies are driving intensive research focused on alternative energy production. Particularly, today’s generation is facing two coexisting problems: the proper management of wastes generated from the industrial sectors, and t...

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Main Author:	Siddique, Md. Nurul Islam
Format:	Thesis
Language:	English
Published:	2015
Subjects:	TD Environmental technology Sanitary engineering
Online Access:	http://umpir.ump.edu.my/id/eprint/11004/1/Co-digestion%20of%20petrochemical%20wastewater%20with%20activated%20manure%20in%20continuous%20stirred%20tank%20reactor%20for%20methane%20production.pdf
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spelling	my-ump-ir.110042023-05-18T03:23:27Z Co-digestion of petrochemical wastewater with activated manure in continuous stirred tank reactor for methane production 2015-04 Siddique, Md. Nurul Islam TD Environmental technology. Sanitary engineering The combined challenges of environmental crisis and declining fossil fuel supplies are driving intensive research focused on alternative energy production. Particularly, today’s generation is facing two coexisting problems: the proper management of wastes generated from the industrial sectors, and the scarcity for novel resources of gasoline to meet up energy demand of civilization. Anaerobic co-digestion, a sustainable green technology, presents an outstanding opportunity for both energy conversion and pollution control. Therefore, it has become a core method 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. 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+) for 5 min exposure elevated biodegradability index (BOD/COD) up to 35%. 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. Although methane production is considered to get introverted by VFA accumulation leading to reactor instability during anaerobic digestion, a 10 mg/L of NH4HCO3 dosing and the co-digestion of PWW together with BCM and DCM caused 50% enhancement in methane production, followed by a 98±0.5% reduction in COD at 10 days hydraulic retention time. No VFA buildup was identified. 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 co-digestion. This was induced by an optimum C: N ratio (30:1) of the feed stock ensuring microbial growth and buffering capacity. The anaerobic digestion, biogas generation, and energy assessment were analyzed for ten flow rates; 170, 220, 300, 370, 410, 475, 540, 600, 640 and 680 mL/day. The analytical data revealed that the environmentally complied optimum flow rate was 170 mL/day, for maximum methane generation. As the F/M proportion varied from 0.25 to 2.0 and organic loadings from 6.31-27.14 (g VS/L), however, it has been observed that the methane yield increased from 451.9±15 to 461.5±17 and 519.8±15 to 520.9±16 mL/ g VS as the F/M ratio increased from 0.25 to 0.5 for mesophilic and thermophilic states respectively but decreased gradually even when the F/M ratio increased up to 2. However, considering all the factors F/M ratio of 0.5 was observed to be the optimum to avoid system imbalance. This work may help in minimizing the environmental issues of petrochemical wastewater treatment in the future 2015-04 Thesis http://umpir.ump.edu.my/id/eprint/11004/ http://umpir.ump.edu.my/id/eprint/11004/1/Co-digestion%20of%20petrochemical%20wastewater%20with%20activated%20manure%20in%20continuous%20stirred%20tank%20reactor%20for%20methane%20production.pdf pdf en public phd doctoral Universiti Malaysia Pahang Faculty Of Engineering Technology Abdul Wahid, Zularisam
institution	Universiti Malaysia Pahang Al-Sultan Abdullah
collection	UMPSA Institutional Repository
language	English
advisor	Abdul Wahid, Zularisam
topic	TD Environmental technology Sanitary engineering
spellingShingle	TD Environmental technology Sanitary engineering Siddique, Md. Nurul Islam Co-digestion of petrochemical wastewater with activated manure in continuous stirred tank reactor for methane production
description	The combined challenges of environmental crisis and declining fossil fuel supplies are driving intensive research focused on alternative energy production. Particularly, today’s generation is facing two coexisting problems: the proper management of wastes generated from the industrial sectors, and the scarcity for novel resources of gasoline to meet up energy demand of civilization. Anaerobic co-digestion, a sustainable green technology, presents an outstanding opportunity for both energy conversion and pollution control. Therefore, it has become a core method 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. 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+) for 5 min exposure elevated biodegradability index (BOD/COD) up to 35%. 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. Although methane production is considered to get introverted by VFA accumulation leading to reactor instability during anaerobic digestion, a 10 mg/L of NH4HCO3 dosing and the co-digestion of PWW together with BCM and DCM caused 50% enhancement in methane production, followed by a 98±0.5% reduction in COD at 10 days hydraulic retention time. No VFA buildup was identified. 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 co-digestion. This was induced by an optimum C: N ratio (30:1) of the feed stock ensuring microbial growth and buffering capacity. The anaerobic digestion, biogas generation, and energy assessment were analyzed for ten flow rates; 170, 220, 300, 370, 410, 475, 540, 600, 640 and 680 mL/day. The analytical data revealed that the environmentally complied optimum flow rate was 170 mL/day, for maximum methane generation. As the F/M proportion varied from 0.25 to 2.0 and organic loadings from 6.31-27.14 (g VS/L), however, it has been observed that the methane yield increased from 451.9±15 to 461.5±17 and 519.8±15 to 520.9±16 mL/ g VS as the F/M ratio increased from 0.25 to 0.5 for mesophilic and thermophilic states respectively but decreased gradually even when the F/M ratio increased up to 2. However, considering all the factors F/M ratio of 0.5 was observed to be the optimum to avoid system imbalance. This work may help in minimizing the environmental issues of petrochemical wastewater treatment in the future
format	Thesis
qualification_name	Doctor of Philosophy (PhD.)
qualification_level	Doctorate
author	Siddique, Md. Nurul Islam
author_facet	Siddique, Md. Nurul Islam
author_sort	Siddique, Md. Nurul Islam
title	Co-digestion of petrochemical wastewater with activated manure in continuous stirred tank reactor for methane production
title_short	Co-digestion of petrochemical wastewater with activated manure in continuous stirred tank reactor for methane production
title_full	Co-digestion of petrochemical wastewater with activated manure in continuous stirred tank reactor for methane production
title_fullStr	Co-digestion of petrochemical wastewater with activated manure in continuous stirred tank reactor for methane production
title_full_unstemmed	Co-digestion of petrochemical wastewater with activated manure in continuous stirred tank reactor for methane production
title_sort	co-digestion of petrochemical wastewater with activated manure in continuous stirred tank reactor for methane production
granting_institution	Universiti Malaysia Pahang
granting_department	Faculty Of Engineering Technology
publishDate	2015
url	http://umpir.ump.edu.my/id/eprint/11004/1/Co-digestion%20of%20petrochemical%20wastewater%20with%20activated%20manure%20in%20continuous%20stirred%20tank%20reactor%20for%20methane%20production.pdf
_version_	1783731939193126912

Co-digestion of petrochemical wastewater with activated manure in continuous stirred tank reactor for methane production

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