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Abstract	
Municipal	wastewater	contains	various	organic	matters	and	contaminants	that	may	cause	
pollution	when	they	are	not	removed	prior	to	discharge	to	the	environment.	In	terms	of	
wastewater	pollutants	removal,	Anaerobic	Membrane	Bioreactor	(AnMBR)	has	seemed	to	be	
an	 efficient	 technology	 compared	 to	 other	 wastewater	 treatment	 techniques.	 This	
technology	is	an	integrated	system	that	treats	wastewater	through	a	combination	of	two	
different	processes:	anaerobic	digestion	and	membrane	filtration.	Recently,	a	lot	of	studies	
have	been	done	to	develop	anaerobic	membrane	bioreactor	systems.		
A	study	on	treatment	of	municipal	wastewater	was	carried	out	using	1L	laboratory	scale	
anaerobic	 membrane	 bioreactor.	 This	 study	 aimed	 to	 contribute	 to	 the	 development	 of	
anaerobic	membrane	bioreactors.	Set-up,	design	and	start-up	of	this	lab	scale	AnMBR	were	
our	specific	goals.	Assembly	work	was	done	for	the	set-up	of	the	bioreactor.	Preliminary	tests	
using	tap	water	was	done	to	check	the	function	of	the	membrane	bioreactor,	and	to	fix	any	
leakages	observed	with	tube	fittings	and	other	equipment.	Municipal	wastewater	having	total	
COD	concentration	of	543mg/L	was	used	to	start	treatment	processes.	We	increased	this	COD	
concertation	to	1560mg/L	on	8th	day	of	the	treatment.	Flow	rate	for	feed	and	permeate	was	
chosen	to	be	1.7mL/min.	The	AnMBR	was	continuously	stirred	at	35	rpm	and	operated	at	
37oC.	Occasional	rapid	stirring	at	100rpm	for	30s	was	done	to	reduce	formation	of	cake	on	
the	membrane.	pH	of	the	bioreactor	liquor	was	controlled	and	adjusted	to	be	around	7.		
Treatment	productivity	of	the	lab	scale	AnMBR	was	also	determined	by	looking	at	its	COD	and	
bacterial	removal	efficiency,	and	measuring	its	biogas	production.	Results	obtained	from	COD	
and	bacterial	analysis,	for	feed	wastewater	and	permeate	samples,	allowed	to	affirm	that	this	
AnMBR	had	a	COD	and	bacterial	removal	efficiency	of	61%	and	61.35%	respectively.	Biogas	
production	was	only	observed	in	the	end	of	this	study,	and	no	measurement	of	the	produced	
gas	volume	was	done.		
There	 were	 some	 limitations	 during	 this	 study.	 Work	 period	 was	 very	 short	 and	 the	
wastewater	treatment	processes	were	disturbed	by	membrane	misplacement.

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Thesis Abstract-eric

  • 1.
  • 2. Abstract Municipal wastewater contains various organic matters and contaminants that may cause pollution when they are not removed prior to discharge to the environment. In terms of wastewater pollutants removal, Anaerobic Membrane Bioreactor (AnMBR) has seemed to be an efficient technology compared to other wastewater treatment techniques. This technology is an integrated system that treats wastewater through a combination of two different processes: anaerobic digestion and membrane filtration. Recently, a lot of studies have been done to develop anaerobic membrane bioreactor systems. A study on treatment of municipal wastewater was carried out using 1L laboratory scale anaerobic membrane bioreactor. This study aimed to contribute to the development of anaerobic membrane bioreactors. Set-up, design and start-up of this lab scale AnMBR were our specific goals. Assembly work was done for the set-up of the bioreactor. Preliminary tests using tap water was done to check the function of the membrane bioreactor, and to fix any leakages observed with tube fittings and other equipment. Municipal wastewater having total COD concentration of 543mg/L was used to start treatment processes. We increased this COD concertation to 1560mg/L on 8th day of the treatment. Flow rate for feed and permeate was chosen to be 1.7mL/min. The AnMBR was continuously stirred at 35 rpm and operated at 37oC. Occasional rapid stirring at 100rpm for 30s was done to reduce formation of cake on the membrane. pH of the bioreactor liquor was controlled and adjusted to be around 7. Treatment productivity of the lab scale AnMBR was also determined by looking at its COD and bacterial removal efficiency, and measuring its biogas production. Results obtained from COD and bacterial analysis, for feed wastewater and permeate samples, allowed to affirm that this AnMBR had a COD and bacterial removal efficiency of 61% and 61.35% respectively. Biogas production was only observed in the end of this study, and no measurement of the produced gas volume was done. There were some limitations during this study. Work period was very short and the wastewater treatment processes were disturbed by membrane misplacement.