000			04057nas a2200433 i 4500
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008			160699s1991 th u m rtt 0| d1eng d
035			_a.b10661505
099		9	_aAIT RSPR no. EV-91-01
100	1		_aHu, Qichun
245	1	0	_aSystematical study on biogas technology application in Xindu rural area, China
260			_aBangkok : _bAsian Institute of Technology, _c1991
300			_a88 p. + _e1 online resource
490	1		_aResearch studies project report ; _vno. EV-91-1
500			_aA research study submitted for approval in partial fulfillment of the requirement for the degree of Master of Science
502			_aResearch Studies Project Report (M.Sc.) - Asian Institute of Technology, 1991
520			_aThe field survey mainly by means of questionnaire to investigate the present state of the application of biogas technology, was conducted in the three representative villages in Xindu county, China. Among total of 1678 farmer households, there were 804 households owning digesters, but only 374 digesters in use. Biogas shared 7.5% of daily fuel c3nsumpti on. Under local condition, the capital invested of a digester with 8 m volume \vas 439 Yuan, (equivalent to 93 U$, 1990). If one household digester could produce 246.6 m3 biogas per year and the equivalent price of biogas was 0.265 Yuan, the pay-back time was about 7 years. The vast majority of present digesters in use were cylindrically fixed dome hydraulic digesters with an average volume of 9.6 m3. Based on conventional type of the digesters, some modified digesters have developed recent years , in this area. The quality and the lifetime of the digesters in use were also be analyzed. There were nearly half of the digesters in use, need to be renewed gradually up t o 1995, since the reason of their quality. Otherwise the biogas consumption level in these areas would be reduced later on. Meanwhile the proposals for solvi ng the problems restraining the adoption of biogas technology were also given. The economic benefits of the digesters could be promoted by both increasing the using ratio of total digesters and the biogas production rate. And also the application of the technologies of digested residue could increase the income from biogas fermentation. Because there crop straws were rarely being used as fermentation materials, the function of converting straws to fertilizer by the digersters might be loss. In addition, since only pig manure and human excreta were as the substrate, the shortage of fermentation material was common problem. A new pattern for straw utilization was proposed, in which raising cattle with straw as a feed, and consequently the feed of cattle manure to the digesters is likely a promising way to solve the shortage of fermentation material.
650	1	0	_aBiogas _xChina _xXindu
700	1		_aHarada, Hideki, _eChairperson
700	1		_aTentscher, Wolfgang, _eExamination committee
700	1		_aVerink, Johan, _eExamination committee
700	1		_aMino, T., _eExamination committee
710	2		_aAustralian Government, _eScholarship donor
810	2		_aAsian Institute of Technology. _tResearch studies project report ; _vno. EV-91-1
856			_3Full-Text _uhttp://203.159.5.9/ait-thesis/detail.php?q=B17055
907			_a.b10661505 _bmnait _cy
902			_a240401
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