Cultivation of in sewage

Wong, Ming Hung; Lau, K.L.

doi:10.1016/0045-6535(79)90072-9

Cited by 5 publications

(3 citation statements)

References 8 publications

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“…There have been previous attempts to cultivate Ulva in sludge extract, and it was shown that a concentration of 0.1-1% sludge gave good growth of U. lactuca, but the species could not survive in higher concentrations of sludge (Wong and Lau 1979). In addition, Chan et al (1979) cultivated thallus disks of U. lactuca in laboratory Fig.…”

Section: Phosphate Uptakementioning

confidence: 97%

“…A number of studies have examined the feasibility of using different seaweed species as biofilters in tertiary sewage treatment using either sewage sludge or effluent (Prince 1974;Goldman et al 1974a,b;Chan et al 1979;Ryther et al 1979Ryther et al , 1984Wong and Lau 1979). More recently, the use of seaweeds as biofilters has been extended beyond the treatment of domestic sewage, and has focused on the removal of inorganic nutrients from the effluents of fish farms in integrated aquaculture (Krom et al 1995;Chopin et al 2001;Neori et al 2004;Troell et al 2003), or on the removal of heavy metals from industrial effluents (Davis et al 2003).…”

Section: Introductionmentioning

confidence: 97%

“…However, the only information on phosphate absorption by Ulva lactuca cultivated in domestic sewage effluent or in a mixture of effluent and seawater comes from the work of Wong and Lau (1979) and Chan et al (1979). The former paper reported on the use of sludge extract and sewage effluent as a culture medium, and mainly focused on thallus growth and heavy metal absorption under different concentrations of sludge in the culture medium.…”

Section: Introductionmentioning

confidence: 98%

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Removal of phosphate by the green seaweed Ulva lactuca in a small-scale sewage treatment plant (Ios Island, Aegean Sea, Greece)

et al. 2009

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In the present study, the use of seaweeds for phosphate absorption was examined as a tertiary treatment in sewage treatment plants, to improve the water quality and reduce eutrophication risks. The data came from both laboratory and field experiments that took place on Ios Island sewage treatment plant. Three different macroalgae were tested and Ulva lactuca was finally chosen thanks to its high survivability in low salinity waters. Since the main restrictive factor was low salinity, we initially established the ratio of seawater:effluent that combined satisfactory viability with maximum phosphate absorption. The biomass growth under these conditions was also examined. Based on the above results, we designed a continuous-flow system with a 1/4 volume per hour water turnover, in a mixture of 60% sewage effluent: 40% sea water and 30 g L -1 initial biomass of U. lactuca that must be renewed every 10 days. Under these conditions and time frame, the phosphate content of the effluent was reduced by about 50%.

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Section: Phosphate Uptakementioning

confidence: 97%