| Experiment on co-fermentation and anaerobic fermentation of livestock manure and wheat straw |
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| DOI：10.7606/j.issn.1000-7601.2010.06.16 |
| Key Words: livestock manure straw mixed fermentation anaerobic fernentation |
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| Abstract: |
| Using pig manure and wheat straw as fermenting materials, an experiment was carried out in a small self-
manufactured biogas ferment device to study the influence of different inoculum densities on reactor start-up, pH-value， COD, biogas production and gas generation rate. The results showed that: microflora of methane and microflora of acid-producing in anaerobic system with a high inoculum concentration would be fast to achieve a balance to maintain pH-value of the system in a range which is conducive to the growth of methane bacteria. Under the condition of definite solids con-centration (6%), as the increase of inoculum density, COD removal rate, gas generation rate and biogas production. But when the treatment group inoculum concentration of material above 30% starts up at the same time, the increase of biogas production is unconspicuous. When the inoculum concentration of fermenting materials equals to 30%, the result is the best. At this time, it not only wastes no inoculation or operating cost, but also produces gas effectively. |
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