Parameter analysis of the IWA Anaerobic Digestion Model No. 1 for the anaerobic digestion of blackwater with kitchen refuse.

The IWA anaerobic digestion model No.1 (ADM1) had been successfully applied to the lab-scale mesophilic blackwater anaerobic digestion (BWAD) plant for cases of only blackwater (BW) feeding and of BW plus kitchen refuse (KR) feeding. In this paper, the simulation results of BW + KR anaerobic digestion are presented and discussed, followed by the analyses and discussion of the critical and important parameters as well as the performance of ADM1 based on these results. The raw BW can contain up to 30% short chain fatty acids (SCFA) which severely impact the performance of the model. The model proved that the disintegration/hydrolysis rate of BW is around 4.5 d(-1), which is about ten times higher than that of KR (Kdis,KR = 0.5 d(-1)). ADM1 is not sensitive to the distribution ratio among carbohydrates, proteins and lipids. For BWAD the C4 metabolism can be integrated in the uptake of LCFA. The uptake delay phenomenon was observed and cannot be simulated by ADM1, but it is tolerable. No unique KI,NH3,ac is found out for all investigated ammonia concentration ranges. Meanwhile, ADM1 is not sensitive to KLa and kp1 so they can easily be set up.

[1]  Jörg Lange,et al.  Sustainable water and waste management in urban areas , 1997 .

[2]  I. Angelidaki,et al.  Kinetics and modeling of anaerobic digestion process. , 2003, Advances in biochemical engineering/biotechnology.

[3]  R Otterpohl,et al.  Anaerobic digestion of blackwater from vacuum toilets and kitchen refuse in a continuous stirred tank reactor (CSTR). , 2007, Water science and technology : a journal of the International Association on Water Pollution Research.

[4]  J. Gossett,et al.  Anaerobic Digestion of Waste Activated Sludge , 1982 .

[5]  Martin Oldenburg,et al.  Source control in urban sanitation and waste management: Ten systems with reuse of resources , 1999 .

[6]  S. Sung,et al.  Ammonia inhibition on thermophilic aceticlastic methanogens. , 2002, Water science and technology : a journal of the International Association on Water Pollution Research.

[7]  W. Gujer,et al.  Mathematical model for meso- and thermophilic anaerobic sewage sludge digestion. , 2002, Environmental science & technology.

[8]  D J Batstone,et al.  Kinetics of thermophilic, anaerobic oxidation of straight and branched chain butyrate and valerate , 2003, Biotechnology and bioengineering.

[9]  Modelling and control of high-rate anaerobic wastewater treatment systems , 1997 .

[10]  J M Lema,et al.  Anaerobic treatment: a key technology for a sustainable management of wastes in Europe. , 2001, Water science and technology : a journal of the International Association on Water Pollution Research.

[11]  R Otterpohl,et al.  Implementation of the IWA anaerobic digestion model No.1 (ADM1) for simulating digestion of blackwater from vacuum toilets. , 2006, Water science and technology : a journal of the International Association on Water Pollution Research.

[12]  J. Gossett,et al.  A kinetic model for anaerobic digestion of biological sludge , 1986, Biotechnology and bioengineering.

[13]  M Perrier,et al.  Liquid-to-Gas Mass Transfer in Anaerobic Processes: Inevitable Transfer Limitations of Methane and Hydrogen in the Biomethanation Process , 1990, Applied and environmental microbiology.

[14]  P. Reichert.  AQUASIM-a tool for simulation and data analysis of aquatic systems , 1994 .

[15]  B. Ahring,et al.  A mathematical model for dynamic simulation of anaerobic digestion of complex substrates: Focusing on ammonia inhibition , 1993, Biotechnology and bioengineering.