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Register a new userThe effect of mechanical pretreatment of poultry litter in the productivity of biogas
تأثير المعالجة الأولية الميكانيكية لفرشة الدواجن في إنتاجية الغاز الحيوي
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Added by
Damascus University ورقة بحثية
Publication date
2014
fields
Rural Engineering
and research's language is
العربية
Created by
Shamra Editor
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تعد فرشة الدواجن أحد المخلفات العضوية في سورية، التي يمكن أن تكون مصدراً للطاقة النظيفة إذا ما عولجت علاجاً غير هوائي. و قد هدف هذا البحث إلى تحري تأثير المعالجة الأولية الميكانيكية لفرشـة الدواجن في إنتاج الغاز الحيوي و الميثان. أجريت التجارب في وحـدات تخميـر مخبريـة علـى عينـات مطحونة موزعة على أجزاء بأقطار 1مم، و 3مم، و 10مم، ضمن درجة حرارة 37 س و لمـدة 42 يومـاً و مقارنتها مع عينات غير معالجة ميكانيكياً.
Poultry litter is an organic waste in Syria which can be a source of clean energy if treated anaerobically. This research aimed to investigate the effect of mechanical pretreatment of poultry litter in producing biogas and methane. Experiments were performed in units of fermentation laboratory on samples ground spread over parts diameters 1 mm, 3 mm, and 10 mm at at 37°C temperature, for a period of 42 days and compared with untreated samples mechanically.
References used
Al Afif, R. and V. Kryvoruchko. 2009. Anaerobic digestion of by-products from sugar processing-Influence of co-fermentation with animal manure and energy crops for methane productivity, Damascus University journal for the Agricultural sciences, 25(1):191-205
Bruni, E., A. P. Jensen and I. Angelidaki. 2010. Comparative study of mechanical, hydrothermal, chemical and enzymatic treatments of digested biofibers to improve biogas production, Bioresource Technology. 101:8713– 8717
Demirbas, A. 2008. Products from lignocellulosic materials via degradation processes, Energy Sources Part A 30: 27–37
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The corrosion of biogas pipes and equipments damage as generators, boilers and coprocessors is one of
the most real important problems in Damascus wastewater treatment plant (at Adra region). These
problem caused high financial losses and costs , t
hat it required studying and solving. Biogas is the result
of an aerobic digestion process of sludge, it contains about 50-70% of methane as a main resource of
power, where the biogas considers free when it release spontaneity. Different analysis have been occurred
on the biogas to show its components, tests on the pipes material and analysis of sediment material inside
the pipes that caused by biogas.
The Research aimed to use the technology of the fermentation to produce the biogas from the cow manure. The digester has benn carried according to the Indian model. The digester consit of one cylinerical tank with 9.42m3 volume (height 3m, diameter 2
m) and gastank with 6m3 (height 1m) and inlet pipe and outlet pipe. The study showed the following:
The accumulated production of biogas was through the 30 days retention time 48m3. The heighest production was in the thirteenth day with 4.5m3. The farm became after the use of digester clean and with little insect and smell.
With use 1m3 of biogas could we use one cooker for 2.5 hour and with the same quantity could we use one inner combustion diesel motor (90% biogas and 10% diesel) for half an hour.
3/4m3 from digester volume is enough for one cow with 12 kg manure daily. So we can design the suitable digester for any farm.
In this research the effect of Nickel addition by various
percentages on the mechanical properties of
Aluminum-Copper alloy was studied. After
adding Nickel the alloys was artificially aged for different
times, and the effect of Nickel on
the re
sponse of alloy to precipitation hardening was studied.
Where the effect of Nickel on the microscope structure was
studied, and on the mechanical properties as hardness, tensile
strength, yield strength and elongation. The results showed that
the increase of Nickel improve this properties, where the highest
values were obtained when the Nickel's percentage was 5% Wt.
This research discusses the affecting factors of biogas production
in the digester, to define the optimal temperature and suitable
loading rate to achieve high digester biogas production. The
research focuses on the water compressed continuous flo
w
digester (chines model), and the results is presented and illustrated
in suitable tables and curves.
This study included a test of 90 chickens; 90 samples as (a chest) and 90 samples as (a thigh). These samples were divided into four categories: the first one (45 chests) was stored with packages in a tin sheet, the second (45 chests) unpacked, the t
hird (45 thighs) was stored with packages in a tin plate, the fourth (45 thighs) unpacked. The samples of each category were divided into three groups. Each group consists of 15 samples. These groups were stored at (25+°, 4+°, 20-°) .Then, the pH and the total count of bacteria were measured during storage in order to observe the time in which the samples will start to spoil in accordance with the Syrian Standards and Specifications Corporation 2007. We noticed the following physical changes: color, odor, flavor and texture. The results showed that the spoilage of the thigh samples happened before the chest ones and the packaged samples before the unpackaged ones. The samples spoiled after 24h of storage at 25+° and after 7 days of storage at 4+°, whereas, there was no spoilage noticed for the samples at 20-° but the appearance changed after 6 months of storage. Packing had a good effect on preservation. The conclusions and the suggestions were written in order to guide the consumer in the field of poultry meat storage.
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