Gro wth Properties of Typical Water Bloom Algae in Reclaimed Water

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1 ENVIRONMENTAL SCIENCE Vol. 31,No. 1 Jan.,2010, 3, (,, ) :,.,, ( Microcystis aeruginosa),3 (A 2 O ) 10 6 ml - 1,> 0139 d - 1. A 2 O222,. TP ( K max ) ( R max ), Monod. :; ; ; ; :X173 :A : (2010) Gro wth Properties of Typical Water Bloom Algae in Reclaimed Water YANGJia, HU Hong2ying, LI Xin ( ESPC State Key Joint Laboratory, Department of Environmental Science and Engineering, Tsinghua University, Beijing , China) Abstract :Based on Algal Growth Potential Test, the water bloom risk of reclaimed water was studied. Microcystis aeruginosa was proved as the main algae under the experimental conditions in this study. In 3 kinds of secondary effluent (A 2 O, Oxidation Ditch and Activated Sludge), its maximum density could attain above 10 6 cells ml - 1, and the specific rate was above 0139 d - 1. Advanced treatment (A 2 O2Ultrafiltration Membrance Filter2Activated Carbon and Chlorine Disinfection) did not reduce the growth potential of Microcystis aeruginosa. The effects of initial concentration of phosphorus in reclaimed water on maximum density( K max ) and population growth rate ( R max ) of Microcystis aeruginosa can be described with Monod equation. Key words : Microcystis aeruginosa ; reclaimed water ; initial TP concentration ; algae growth potential ; water bloom control, [1,2 ]., [3 ]., [4,5 ], [6 8], [9 10].., TNΠmg L - 1,, TP Q J G(Q J G), 1.. Table 1 Wastewater samples and related water quality TPΠmg L - 1 NH 4 + 2NΠmg L - 1 Q A 2 O J G ph ( Microcystis aeruginosa) ( Selenastrum capricornutum) ( Scenedesmus dimorphus) ( Chlorella ellipsoidea). : ; : : ( ) :(1983 ),,,,E2mail : com 3,E2mail edu. cn

2 1 : 77 BG11, SE. 25, lx, 75 %, 14 h 10 h (Algal Growth Potential Test) [11 ]. 250 ml 100 ml, (121, 30 min). 110 ml ( 15 mg L ), 25, lx, 75 %, 14 h 10 h. 3.,., ,TN TP NH + 4 2N 2 [12 ]. ph SG2 ph. 113 Logistic. Logistic [13 ] : N = dn dt K 1 + e a- rt (1) = rn K - N K, N t ( ml - 1 ) ; t (2) (d) ; K ( ml - 1 ) ; a, ; r (d - 1 ), ; dnπdt [ (ml d) - 1 ]. (1), S. (2),,, R max = rkπ4 [ (ml d) - 1 ] ml Q J G 5 ml, d, ,Q J G, :15 d 1 Q J G Fig. 1 Growth potential of mixed algae in samples Q,J and G under different temperature, 2., ( Microcystis aeruginosa ) ( Chlorella ellipsoidea) ( Scenedesmus dimorphus) ( Selenastrum capricornutum).,4 Q, 2.,, 2 Q J G Table 2 Main species of algae in samples Q, J and G Π Q J G ; ; ; ;

3 78 31,. 3., 25, 3.,Q J G, 14 d ,G 3 d, ( 13 d) ml - 1. Q J 5 d, ( 12 d) ml ml Q Fig. 2 Growth curve of mixed algae in sample Q,,,. [14 ],. [15 ],. [16 ], Q J G Fig. 3 Growth curve of Microcystis aeruginosa in samples Q, J and G Logistic Q J G, 3., Q J G d - 1, ml Q J G Logistic Table 3 Logistic parameters of Microcystis aeruginosa s growth in samples Q,J,G R K ( r) 10 6 Π ml - 1 Πd - 1 R max 10 6 Π (ml d) - 1 Q J G , [17 ], TP mg L - 1, d - 1,, Q J G ml - 1 [18,19 ], 10 6 ml - 1 [9,10 ]. A 2 O, ml - 1,. 213,., 3

4 1 : 79., A 2 O A 2 O222., 4., 3,10 d 10 6 ml Table 4 Effluent qualities of different units of advanced treatment processes A 2 O( ) TNΠmg L - 1 TPΠmg L - 1 NH 4 + 2NΠmg L ph 4 Fig. 4 Growth potential of Microcystis aeruginosa in effluents of different advanced treatment processes 5 TP Fig. 5 Growth curves of Microcystis aeruginosa under different initial TP concentrations 214 TP N P., > 712, [20 23 ].,G Q J ,. TP Q, TP ; N, TN 1510 mg L TP.,TP,,., TP mg L - 1, 4 d, ml - 1 ; TP mg L - 1, 2 d, ml ml - 1. Logistic TP, 6 7. TP 6 TP Fig. 6 Specific growth rate of Microcystis aeruginosa under different initial TP concentrations

5 TP Fig. 7 Maximum algal density and maximum growth rate of Microcystis aeruginosa under different initial TP concentrations, d - 1. TP ; ( R max = rkπ4), Monod. (3) TP Monod : R max,p = R max,p P (3) K P + P, R max,p, TP [ (ml d) - 1 ] ; P TP (mg L - 1 ) ; K P TP. (4) TP Monod : K max,p = K max,p P (4) K P + P, K max,p, TP ( ml - 1 ) ; K P TP. Monod TP, 5, : R max,p K max,p = P P = P P, 5 TP Monod Table 5 Monod parameters of the maximum growth rate and maximum algal density of Microcystis aeruginosa Monod Monod R max Π (ml d) - 1 K P R K Π ml - 1 K P R , TP. Monod, TP, TP,.,TP 0123 mg L - 1. Monod TP, ml - 1, TP mg L ( 1 ), ( Microcystis aeruginosa),3 (A 2 O ) 10 6 ml - 1, 0139 d - 1,. (2) A 2 O222,. (3) TP ( K max ) ( R max ), Monod. (4) Monod, TN 15 mg L - 1,TP 0123 mg L - 1 TP ml - 1, TP mg L - 1.

6 1 : 81 : [ 1 ],,,. [M]. :, [ 2 ] Chu J Y, Chen J N, Wang C, et al. Wastewater reusepotential analysis : implications for China s water resources management [J ]. Wat Res, 2004, 38(11) : [ 3 ] Reed S C, Crites R W, Middlebrooks E J. Natural systems for waste management and treatment[m]. New York : Lewis Publishers, [ 4 ] Metaxa E, Deviller G, Pagand P, et al. High rate algal pond treatment for water reuse in a marine fish recirculation system: Water purification and fish health [J ]. Aquaculture, 2006, 252(1) : [ 5 ],,,. [J ].,2003, 19(2) : [ 6 ],,. [J ].,2001,17(9) : [ 7 ],,,. [J ].,2003,19(7) : [ 8 ]. [ M]. :, [ 9 ],,,. [J ].,2005,31(8) : 629. [10 ],,,. [J ].,2006,24 (5) : [11 ]. [M]. :, [12 ]. [M]. ( ). :, [13 ]. [ D ]. :, [14 ],,,. [J ].,2005,31(12) : [15 ]. [ D ]. :, [16 ],,,. [J ].,2006,24 (5) : [17 ],,,. [J ].,1994, 30 (4) : [18 ],,,. [J ].,2000,13(2) : [19 ]. [J ].,1995, (5) : [20 ] Hilton J, O Hare M, Bowes M J. How green is my river? A new paradigm of eutrophication in rivers[j ]. Sci Total Environ, 2006,365 (123) : [21 ] Home A J, Goldman C R. Liuuaology[ M]. (Second Edition). New York : McGraw2Hill, Inc.,1994. [22 ],,,. [J ].,2004,17 (S1) : [23 ],,,. [J ]., 2006, 26 (1) :

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