الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
Egypt and some developing countries are facing a shortage of water needs, so it is necessary
to develop low cost technology to suit these countries and optimize the use of surrounding water.
Achieving high efficiencies in anaerobic baffled reactor (ABR) for reducing chemical oxygen
demand (COD) has always been an outstanding challenge for most researchers as most
experiments focus on using fibers in ABR to reduce COD. In this paper a new material was
introduced as a replacement for fibers which is the agricultural waste such as palm fibers
and ficus trees. The Effect of using agricultural wastes on the performance of the (ABR)
in reducing COD was tested for four different stages (start-up, steady state, shock and final).
Both palm fibers and ficus trees samples achieved higher COD removal efficiency as compared
to previous studies. The palm fiber samples achieved the highest COD removal efficiency in the
four stages as compared to the ficus tree samples.
An exploration regarding the applicability, development and possible future presentation of
the an-aerobic baffled reactor (ABR) for the wastewater treatment has been carried out.
The reactor design has been established since early 1980s and has several benefits compared
to well-established systems. It contains, good flexibility to organic loading and hydraulic,
virtuous biomass retaining time, sludge yield reduces, also capacity towards partially
separate between different stages for an-aerobic process. The slow rate of changes for
populations of bacteria allowing well advanced resistance to alternate the environmental
parameters for instance pH and temperature and protection against contaminated materials.
There are many alterations such as insertion of an-aerobic polishing stage, resulting in a
reactor which can treat difficult wastewaters which now require many units, eventually
expressively reducing capital cost. The main idea of the study is to investigate the behavior
of these reactors and prove the use of biofilm in refining treatability, to promote the use of
both type of biofilm, i.e. ficus fiber and palm fiber. Several important factors have been
worked out i.e. temperature, no. of baffles in the reactor, shape of baffled and location of
reactor in order to avoid lighting. For all the tested reactors, influent and effluent COD
concentration, influent and effluent pH, temperature in reactor and flow rate, in all reactor
stage (start-up, steady state, shock load and final stage), pH in all partition from reactors
during shock load stage were examined. Results discovered the “ABR C” scenario gave
the highest COD % removal as compared to other two scenarios. Simple experimental
arrangement was used to see the treatability feature of synthetic wastewater. when tested
under altered COD (500 - 1000 and 2000 mg/l) with flow rate 38 l/d and pH value 8.5. pH
effect on treatability was explored too.