2012 Fiscal Year Final Research Report
Pilot-scale Experiment for Practical Application of AnaerobicCo-digestion Technology of Sewage Sludge and Rice Straw
| Project/Area Number |
22560542
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (C)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 一般 |
|---|
| Research Field |
Civil and environmental engineering
|
|---|
| Research Institution | Nagaoka University of Technology |
|---|
Principal Investigator |
FUJITA Shoichi 長岡技術科学大学, 工学部, 研究員 (30359707)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
KOMATSU Toshiya 長岡技術科学大学, 工学部, 准教授 (10234874)
HIMENO Shuji 長岡技術科学大学, 工学部, 准教授 (31150360)
|
|---|
| Project Period (FY) |
2010 – 2012
|
| Keywords | バイオマス |
|---|
| Research Abstract |
Anaerobic co-digestion of sewage sludge and currently unused biomass has been paid attention. In this study, we operated pilot-scale digesters for practical application of the co-digestion technology of sewage sludge and rice straw. Before the pilot-scale study, laboratory-scale anaerobic digestion experiments were conducted in order to determine the pretreatment conditions of rice straw in the pilot-scale experiments. Pilot-scale equipment was installed in a sewage treatment plant. Three digesters having 500 L working volume were operated. Two digesters were fed sewage sludge with (1) water solubilized rice straw, (2) enzyme-water solubilized rice straw. The feeding ratio of sewage sludge and rice straw was 1:0.2 based on TS. A digester fed sewage sludge alone was operated as a control. The digesters were operated for 9 weeks with hydraulic retention times of about 25 days.As the results, higher TS removal and biogas production were observed by mixing rice straw. In the apparent steady-state condition, methane conversion efficiency of water pretreated rice straw and enzyme pretreated rice straw were 48% and 72% (COD basis), respectively. This study demonstrated that rice straw is a feasible biomassapplicable to co-digestion technology in sewage treatment plants.
|
