Apart from a few reports; Wu (1995), Snow and Ghaly (2008),
etc. in literature, information on the use of water lettuce waste stabilization
pond for industrial wastewater treatment and the reuse
ofthe resulting effluent as biofertilizer is still scanty. This study was
therefore carried out to assess the efficiency of water lettuce based
pond for the treatment of wastewater from rubber processing factories.
The reuse of the treated effluent as liquid biofertilizer was
also investigated.Water lettuce (Pistia stratiotes Linn) belongs to the
family Araceae. A free-floating aquatic herb with thick, succulent
leaves, profuse under water stolons and long, white, unbranched
fibrous roots that may sometimes attach to the bottom of shallow
waters. It reproduces mainly vegetatively by buds and stolons and
rarely produces seeds. They are oblong in shape, 6–12 cm long and
5 cm broad, spongy, strongly inflated and softly hairy on both surfaces,
the lower surface has conspicuous veins (nerves) radiating
from the base ofthe leaves. Itis a common aquatic weed that occurs
instill waters, ponds and pools or inslow flowing rivers and streams
throughout West Africa. Aquatic weeds growing in ponds and lakes
are beneficial for fish and wildlife. Besides providing food and dissolved
oxygen, aquatic weeds can also trap excessive nutrients and
detoxify chemicals (Masters, 1991).
Apart from a few reports; Wu (1995), Snow and Ghaly (2008),etc. in literature, information on the use of water lettuce waste stabilizationpond for industrial wastewater treatment and the reuseofthe resulting effluent as biofertilizer is still scanty. This study wastherefore carried out to assess the efficiency of water lettuce basedpond for the treatment of wastewater from rubber processing factories.The reuse of the treated effluent as liquid biofertilizer wasalso investigated.Water lettuce (Pistia stratiotes Linn) belongs to thefamily Araceae. A free-floating aquatic herb with thick, succulentleaves, profuse under water stolons and long, white, unbranchedfibrous roots that may sometimes attach to the bottom of shallowwaters. It reproduces mainly vegetatively by buds and stolons andrarely produces seeds. They are oblong in shape, 6–12 cm long and5 cm broad, spongy, strongly inflated and softly hairy on both surfaces,the lower surface has conspicuous veins (nerves) radiatingfrom the base ofthe leaves. Itis a common aquatic weed that occursinstill waters, ponds and pools or inslow flowing rivers and streamsthroughout West Africa. Aquatic weeds growing in ponds and lakesare beneficial for fish and wildlife. Besides providing food and dissolvedoxygen, aquatic weeds can also trap excessive nutrients anddetoxify chemicals (Masters, 1991).
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