Anaerobic biodegradability and treatment of grey water in upflow anaerobic sludge blanket (UASB) reactor.

Feasibility of grey water treatment in an upflow anaerobic sludge blanket (UASB) reactor operated at different hydraulic retention time (HRT) of 16, 10 and 6h and controlled temperature of 30 degrees C was investigated. Moreover, the maximum anaerobic biodegradability without inoculum addition and maximum removal of chemical oxygen demand (COD) fractions in grey water were determined in batch experiments. High values of maximum anaerobic biodegradability (76%) and maximum COD removal in the UASB reactor (84%) were achieved. The results showed that the colloidal COD had the highest maximum anaerobic biodegradability (86%) and the suspended and dissolved COD had similar maximum anaerobic biodegradability of 70%. Furthermore, the results of the UASB reactor demonstrated that a total COD removal of 52-64% was obtained at HRT between 6 and 16 h. The UASB reactor removed 22-30% and 15-21% of total nitrogen and total phosphorous in the grey water, respectively, mainly due to the removal of particulate nutrients. The characteristics of the sludge in the UASB reactor confirmed that the reactor had a stable performance. The minimum sludge residence time and the maximum specific methanogenic activity of the sludge ranged between 27 and 93 days and 0.18 and 0.28 kg COD/(kg VS d).

[1]  G Lettinga,et al.  Treatment of domestic sewage at low temperature in a two-anaerobic step system followed by a trickling filter. , 2004, Water science and technology : a journal of the International Association on Water Pollution Research.

[2]  M. Halalsheh.  Anaerobic pre-treatment of strong sewage : a proper solution for Jordan , 2002 .

[3]  Nidal Mahmoud,et al.  Anaerobic pre-treatment of sewage under low temperature (15 [degrees] C) conditions in an integrated UASB-digester system , 2002 .

[4]  Simon Judd,et al.  Technologies for domestic wastewater recycling , 2000 .

[5]  G. Zeeman,et al.  Biodegradability and change of physical characteristics of particles during anaerobic digestion of domestic sewage. , 2001, Water research.

[6]  T. Asano,et al.  Characterization of the size distribution of contaminants in wastewater: treatment and reuse implications , 1985 .

[7]  Willy Verstraete,et al.  Removal of carbon and nutrients from domestic wastewater using a low investment, integrated treatment concept. , 2004, Water research.

[8]  Karina Pipaluk Solvejg Auffarth,et al.  Characteristics of grey wastewater , 2002 .

[9]  G. Zeeman,et al.  Low temperature pre-treatment of domestic sewage in an anaerobic hybrid or an anaerobic filter reactor. , 2002, Bioresource technology.

[10]  Kaijun Wang,et al.  Integrated anaerobic and aerobic treatment of sewage , 1994 .

[11]  A. E. Greenberg,et al.  Standard methods for the examination of water and wastewater : supplement to the sixteenth edition , 1988 .

[12]  Gatze Lettinga,et al.  Anaerobic treatment of domestic sewage under moderate climatic (Dutch) conditions using upflow reactors at increased superficial velocities. , 1992 .

[13]  Erwin Nolde,et al.  Greywater reuse systems for toilet flushing in multi-storey buildings – over ten years experience in Berlin , 2000 .

[14]  Anaerobic digestion potential for ecological and decentralised sanitation in urban areas. , 2006, Water science and technology : a journal of the International Association on Water Pollution Research.

[15]  R. Sudo,et al.  Development of a high-efficiency household biofilm reactor , 1995 .

[16]  Grietje Zeeman,et al.  The role of anaerobic digestion of domestic sewage in closing the water and nutrient cycle at community level , 1999 .

[17]  M Oldenburg,et al.  Innovative technologies for decentralised water-, wastewater and biowaste management in urban and peri-urban areas. , 2004, Water science and technology : a journal of the International Association on Water Pollution Research.

[18]  R. Otterpohl,et al.  Grey water treatment in UASB reactor at ambient temperature. , 2007, Water science and technology : a journal of the International Association on Water Pollution Research.

[19]  Simon Judd,et al.  Membrane bioreactors and their role in wastewater reuse , 2000 .

[20]  R. Leitão.  Robustness of UASB Reactors Treating Sewage Under Tropical Conditions , 2004 .

[21]  Grietje Zeeman,et al.  Treatment of domestic sewage in a two-step anaerobic filter/anaerobic hybrid system at low temperature. , 2002, Water research.

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

[23]  Beatrice Gralton,et al.  Washington DC - USA , 2008 .