期刊
BIORESOURCE TECHNOLOGY
卷 297, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2019.122380
关键词
Partial nitritation/anammox; Thermal hydrolysis process; Anaerobic digestion; Side-stream treatment; IFAS
资金
- National Natural Science Foundation of China [21777005, 51978007]
In this study, a full-scale partial nitritation/anammox (PN/A) process was successfully established to treat dewatering liquor (filtrate) from the activated sludge after thermal hydrolysis (THP) - anaerobic digestion (AD). The filtrate had an average ammonium of 1407 mg/L with a COD/N ratio of 1.43 +/- 0.3. Under limited anammox biofilm inoculation, PN/A was started-up in an integrated fixed - biofilm activated sludge (IFAS) reactor. During the stable period, 2500 m(3) of THP - AD sludge filtrate was treated daily and an average nitrogen removal rate of 0.21 kg N/(m(3).d) was maintained with a removal efficiency over 85%. The application of PN/A reduced mainstream total inorganic nitrogen in effluent by 4.4 mg/L, saving $3.5 million in operational costs annually due to the reduction of organics addition. Overall, IFAS - PN/A process can be an efficient and economical method to treat THP - AD sludge filtrate and improve mainstream nitrogen removal performance.
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