TY - JOUR
T1 - An integrated duckweed and algae pond system for nitrogen removal and renovation
AU - Van Der Steen, Peter
AU - Brenner, Asher
AU - Oron, Gideon
N1 - Funding Information:
This work was partially supported by the European Union AVICENNE program, research project number 93AVI076 on 'Integrated and by the Midbar Foundation, The Netherlands. The authors are very grateful for assistance in the work by Christopher Nganga (Moi University, and Dr. LudmiIla Katz.
PY - 1998/1/1
Y1 - 1998/1/1
N2 - An integrated pond system, consisting of duckweed and algae ponds, was investigated for duckweed production and for further treatment of anaerobically treated domestic wastewater. The system consisted of 10 ponds in series, arranged in 3 stages of 2 duckweed ponds, 3 algae ponds and 5 duckweed ponds, respectively. Production of duckweed ranged from 7.4-16.4 g/(m2.day) (or 27-60 ton/(ha.year)) dry weight in the first pond, to 2.7-8.2 g/(m2.day) (or 10-30 ton/(ha.year))in the last pond. Regression analysis suggested that the production was positively influenced by the concentration of organic compounds in the pond water. The ammonium concentration in the range of 20-60 mg/l NH4-N did not affect duckweed production. Fifty-six percent of the pond influent nitrogen, mainly ammonium, was removed. Ammonium removal was due to uptake by the duckweed plants (18%), nitrification (3%), sedimentation (8%) and combined volatilization of NH3 and denitrification (73%).
AB - An integrated pond system, consisting of duckweed and algae ponds, was investigated for duckweed production and for further treatment of anaerobically treated domestic wastewater. The system consisted of 10 ponds in series, arranged in 3 stages of 2 duckweed ponds, 3 algae ponds and 5 duckweed ponds, respectively. Production of duckweed ranged from 7.4-16.4 g/(m2.day) (or 27-60 ton/(ha.year)) dry weight in the first pond, to 2.7-8.2 g/(m2.day) (or 10-30 ton/(ha.year))in the last pond. Regression analysis suggested that the production was positively influenced by the concentration of organic compounds in the pond water. The ammonium concentration in the range of 20-60 mg/l NH4-N did not affect duckweed production. Fifty-six percent of the pond influent nitrogen, mainly ammonium, was removed. Ammonium removal was due to uptake by the duckweed plants (18%), nitrification (3%), sedimentation (8%) and combined volatilization of NH3 and denitrification (73%).
KW - Duckweed ponds
KW - Integrated systems
KW - Lemna giba
KW - Nutrient removal
KW - Stabilization ponds
KW - Wastewater treatment
UR - http://www.scopus.com/inward/record.url?scp=0031731330&partnerID=8YFLogxK
U2 - 10.1016/S0273-1223(98)00419-3
DO - 10.1016/S0273-1223(98)00419-3
M3 - Conference article
AN - SCOPUS:0031731330
SN - 0273-1223
VL - 38
SP - 335
EP - 343
JO - Water Science and Technology
JF - Water Science and Technology
IS - 1 pt 1
T2 - Proceedings of the 1998 19th Biennial Conference of the International Association on Water Quality. Part 1 (of 9)
Y2 - 21 June 1998 through 26 June 1998
ER -
