| Project/Area Number |
17580285
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (C)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 一般 |
|---|
| Research Field |
Boundary agriculture
|
|---|
| Research Institution | Muroran Institute of Technology |
|---|
Principal Investigator |
KIKUCHI Shintaro Muroran Institute of Technology, Department of Applied Chemistry, Professor (70148691)
|
|---|
| Project Period (FY) |
2005 – 2007
|
| Project Status |
Completed (Fiscal Year 2007)
|
| Budget Amount *help |
¥3,530,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥30,000)
Fiscal Year 2007: ¥130,000 (Direct Cost: ¥100,000、Indirect Cost: ¥30,000)
Fiscal Year 2006: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 2005: ¥2,700,000 (Direct Cost: ¥2,700,000)
|
|---|
| Keywords | africultura and marine industrial wastes / microbial removal of heavy metals / sequential and mixed cultivation / heavi metal-binding proteins / proteolytic microbes / sulfate-reducing bacteria / metal-sulfide precipitates / 農水産物廃棄組織 / 硫化水素 / 応用微生物 / 環境技術 / バイオテクノロジー / 廃棄物再資源化 / 微生物 / カドミウム汚染農水産廃棄物 / 硫化カドミウム沈殿 |
|---|
| Research Abstract |
Microbial removal of heavy metals, especially cadmium, from agricultural and marine industrial wastes were examined. During sequential and mixed cultivation of proteolytic microbes and a strain of sulfate-educing bacteria in an extracts of each waste, heavy metals like cadmium were removed almost completely from the extract as the metal-sulfide precipitate. Whereas a ant amounts of heavy metals remained in the extract after the cultivation of proteolytic microbes or the sulfate-reducing bacterium alone.
These results suggested that heavy metals in agricultural and marine industrial wastes would be present as bound-state with heavy-metal-binding protein such as metallothionein and they would be transformed to the free-state by protease secreted by proteolytic microbes. And then metal-sulfide precipitates could be formed with the free-state of heavy metals and hydrogen sulfide produced by the sulfate-reducing bacterium. Availability of meal-free preparations as. feed were also examined.
|
