| Summary: | 碩士 === 國立中央大學 === 環境工程研究所碩士在職專班 === 95 === The strategy to improve the efficiency of a hybrid anaerobic reactor was studied in this paper. The reactor has never reached its design efficiency since renewing media, and it is intended through this study to investigate the key affecting factors and review the practical improvement strategy.
In this study the operating and analysis data of the reactor since renewing the media was collected, and the key factors affecting the reactor efficiency were reviewed on each aspect of the wastewater quality, hydraulic load, organic load, sludge properties, and BMP test. On the other hand, the correlation between COD removal quantity and volumetric loading rate was reviewed, and an initial verification on the reactor was performed.
The key factors affecting the efficiency were identified due to insufficient sludge quantity in the suspended growth zone of the hybrid reactor; a linear correlation between COD removal quantity and volumetric loading rate was developed and an extra ca. 860 kg/d COD was removed during an initial trial increasing volumetric loading rate from 4.5 to 5.0 kg/m3‧d.
The improvement strategy recommended is: (1) reseed granular sludge and restart up the reactor, and properly control the parameters to accelerate the improvement of the sludge quantity in the suspended growth zone and (2) install a solid and liquid separation facility to recover the excessive washout sludge to the reactor to stable its operation.
The contribution of this paper is identifying the key factors to the low efficiency of a reactor by comparing the operation data with each aspect of the reactor, and the following recommendations of the improvement strategy. This is not only helpful for this hybrid anaerobic reactor but also can be a useful reference to the researches on wastewater treatment efficiency.
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