Abstract：
:Based on the prototype experiment of treating herb wastewater by Up flow Anaerobic Sludge Bed and Anaerobic Filter reactor (UASBAF), an artificial neural network (ANN) model which adopts a back propagation algorithm with momentum and adaptive learning rate was established. And the effect of each parameter to the performance of the reactor was compared, using the method of partitioning connection weights (PCW). The result is pH values>influent of chemical oxygen demand (COD)>hydraulic retention time (HRT)>alkalinity. In addition, many strategies were proposed to optimize the working condition of the system. Adding some alkali to increase pH value when raising influent COD, was an effective way to avoid negative effect to system; low influent COD had a negative impact on the performance of the reactor; pH was suggested to be controlled more than 7.5 when the influent COD was increased over 6000mgL(-1). The best influent COD concentration was 6000-8000mgL(-1) when the conditions were that pH was 7.5, alkalinity was 2000mgL(-1) and HRT was 35-50h; HRT was suggested to be controlled more than 50h to maintain good performance of the reactor with high influent COD (8000-10,000mgL(-1)). These strategies provided an effective way of controlling UASBAF simply.
journal_name
J Biotechnoljournal_title
Journal of biotechnologyauthors
Shi Y,Zhao XT,Zhang YM,Ren NQdoi
10.1016/j.jbiotec.2009.08.014subject
Has Abstractpub_date
2009-10-12 00:00:00pages
70-4issue
1eissn
0168-1656issn
1873-4863pii
S0168-1656(09)00381-2journal_volume
144pub_type
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