โ Scribed by S. Balasubramanian; R. Pappathi; S.P. Raj
No coin nor oath required. For personal study only.
An energy computation of a serially-connected, sewage-fed fish pond system was made. The annual solar radiation was 4456.2 MJ/m:. The synthetic efficiency of solar radiation to different fish ponds varied from 0.46 to 1"24%. The total energy input and phytoplankton production in ponds ranged from 11328 to 29082.2 MJ/y and 8.89 to 23.60 kg/m2/y, respectively. The gross conversion efficiencies of total, photosynthetic, biological and biological-industrial energy varied from 0"58 to 3"3%, 1"5 to 6%, 0"95 to 11"1% and 0"92 to 10%, respectively, in different fish ponds. The gross energy consumption for the production of fish varied from 116"9 to 732.5, 68"9 to 275"8, 34"9 to 443"7 and 38"9 to 456"8 MJ/kg fish for total, solar, biological and biological-industrial energy, respectively, in different ponds. The selection offish species and maintenance of optimum physico-chemical and biological parameters are suggested to improve the energy transformation in sewage-fed fish ponds.
๐ SIMILAR VOLUMES
The distribution of Zn, Pb and Cr in serially-connected sewage-fed fish ponds was studied. The domestic sewage was passed gravitationally through three stabilization ponds and six fish ponds connected in series. The concentrations of the metals in sewage, phytoplankton, zooplankton, fish and sedimen