Biomedical Engineering Reference
In-Depth Information
Table 1
Anaerobic biogas projects of different industries [ 15 ]
Industry
Number
Proportion (%)
Fermentation alcohol
156
38.42
Sugar alcohol
15
3.69
Beer
47
11.58
Beverage
16
3.94
Starch, sugar, food
73
17.98
Citrate acid
21
5.17
Pharmaceutical
20
4.93
Monosodium glutamate
24
3.44
Meat
23
5.67
Petrochemical
12
2.96
Paper
9
2.21
equipment construction technology and the corresponding investment have
significantly increased. At present, although some large-scale anaerobic engi-
neering structures have started to use reinforced concrete, most anaerobic reactors
still use steel structure. There is still a long way to go for the standardization,
automation and complete set of the equipment in this area.
In the past decade, China has been putting great efforts into standardization,
serialization, and industrialization of CSTR and UASB reactors for anaerobic
fermentation. A series of full-mixing anaerobic fermentation tanks, eject pump stir,
and gas stir have been developed. For UASBs, there are now two series of stan-
dardized configurations, rectangle and round types. Recently, some new material
and new technology developed by other countries have been introduced into China
and incorporated into the reactor design, such as the two-fold bite 1:3 assemble
technology from Lipp GmbH, Germany, and the canning technology from
Farmatic, Germany. Such improvements in construction methods have brought
distinct economic benefits. For example, with the employment of assembling or
rolling techniques, the construction period has been considerably shortened and
50% of the material cost can be saved compared to conventional steel structures. In
addition, some confer additional advantages of high corrosion-resistance and
strength. Such modern manufacturing technologies have been widely accepted in
China, and currently there are already dozens of devices in China constructed
using these technologies [ 12 ].
2.2 Substrates
2.2.1 High-Strength Wastewater
The data from the National Statistical Yearbook show that, by 2002, 8.5 billion
tons of organic wastewater and 24.4 million tons of waste were produced each year
from over 10 light industries, including the alcohol, sugar, beer, wine, liquor,
Search WWH ::




Custom Search