Abstract:
:Effluent of an upflow anaerobic sludge blanket reactor was treated in a downflow rope-bed-biofilm-reactor (RBBR) to remove residual organic matter and nitrogen. Nitrogen removal was observed in phase 1 and phase 2 with and without aeration, respectively for 320days each. Organic matter, ammonia and total nitrogen removal efficiencies of 78±2%, 95±1% and 79±11% were obtained in phase 1 and 78±2%, 93±9% and 87±6% in phase 2, respectively. In phase 2, anammox bacteria had a specific anammox activity of 3.35gNm(-2)day(-1). Heme c concentration, sludge characteristics and reaction ratios of dissolved oxygen, alkalinity and pH corroborated contribution of anammox process. Using experimental results kinetic coefficients required for design of RBBR were estimated. Anammox gave more stable performance under varying nitrogen loading and this option is more sustainable for solving problem of nitrogen removal from sewage.
journal_name
Bioresour Technoljournal_title
Bioresource technologyauthors
Chatterjee P,Ghangrekar MM,Rao Sdoi
10.1016/j.biortech.2016.07.002subject
Has Abstractpub_date
2016-10-01 00:00:00pages
723-30eissn
0960-8524issn
1873-2976pii
S0960-8524(16)30966-Xjournal_volume
218pub_type
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