02628nam a2200253   450000500170000000800410001703500150005810000190007324500560009226000520014830000100020049000270021050001520023750200570038952016030044665000190204965000100206870000300207870000480210870000470215671000470220381000590225085600650230920260818095344.0011298s1987    th      r    0000|00eng d  a.b102321261 aWong, Mei-ling10aEffects of various nutrients on growth of chlorella  aBangkok :bAsian Institute of Technology,c1987  a71 p.1 aThesis ;vno. EV-87-12  aA thesis submitted in partial fulfillment of the requirements for the degree of Master of Science, School of Environment, Resources and Development  aThesis (M.Sc.) - Asian Institute of Technology, 1987  aThis study was carried out to investigate the types and quantities  of nutrients, which caused excessive growth of Chlorella in water bodies.  Tap water and distilled water were used as the water medium for the  experiments. Batch experiments were carried out by introducing different  types and amount of nutrients into 250ml conical flasks that contained  200ml of either tap water or distilled water. The same amount of  inoculum algae was added each time and the sample was cultivated under  the same condition of temperature and constant light intensity (1076 Lux).  Growth was measured in terms of the amount of chlorophyll-a.  Different forms of nitrogen (ammonia, nitrate and nitrite) were  found to have different effects on algal growth. The results show that  higher concentration of ammonia caused the higher algal growth in tap  water. Nitrate and nitrite gave less effect on algal growth .  Higher algal growth was achieved in tap water than distilled water  even though same amounts and same types of inorganic nutrients were added.  Phosphorus was found to have no effect on algal growth in tap water  when 0.01 to 2 mg/L of P was added.  River water by itself was unable to sustain high algal growth. But  addition of 5 mg/L of ammoniated to the increase of algal growth .  Oxidation pond effluent with or without the addition of 5 mg/L of ammonia  gave almost the same growth. It is possible that other elements may be  the limiting factor for growth. Sewage treatment plant effluent, on the  other hand, contained high amount of ammonia which resulted in very high  algal growth. 0aEutrophication 0aAlgae1 aHanaki, K., eChairperson0 aChongrak Polprasert,eExamination Committee0 aSarnorn Muttamara, eExamination Committee2 aAustralian Government, eScholarship Donor2 aAsian Institute of Technology.tThesis ;vno. EV-87-12  3Full-Textuhttp://203.159.5.9/ait-thesis/detail.php?q=B19218