|
|
char = A;code = 65
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char = t;code = 116
char = h;code = 104
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char = o;code = 111
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char = h;code = 104
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char = r;code = 114
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char = m;code = 109
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char = d;code = 100
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result sql = A pilot study of bacteriological population changes through potable water treatment and distribution.
A pilot study of bacteriological population changes through potable water treatment and distribution.char = T;code = 84
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char = i;code = 105
char = s;code = 115
char = ;code = 32
char = p;code = 112
char = i;code = 105
char = l;code = 108
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char = ;code = 32
char = s;code = 115
char = t;code = 116
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char = d;code = 100
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char = c;code = 99
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char = e;code = 101
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char = ;code = 32
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char = t;code = 116
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result sql = This pilot study compares the compositions of bacterial biofilms in pipe networks supplied with water containing either high levels of biodegradable organic matter (BOM) or low levels of BOM (conventionally or biologically treated, respectively). The Microbial Identification System for fatty acid analysis was utilized in this study to identify a large number of organisms (>1,400) to determine population changes in both conventionally and biologically treated water and biofilms. Data generated during this study indicated that suspended bacteria have little impact on biofilms, and despite treatment (conventional or biological), suspended microbial populations were similar following disinfection. Prechlorination with free chlorine resulted not only in reduced plate count values but also in a dramatic shift in the composition of the bacterial population to predominately gram-positive bacteria. Chlorination of biologically treated water produced the same shifts toward gram-positive bacteria. Removal of assimilable organic carbon by the biologically active filters slowed the rate of biofilm accumulation, but biofilm levels were similar to those found in conventionally treated water within several weeks. Iron pipes stimulated the rate of biofilm development, and bacterial levels on disinfected iron pipes exceeded those for chlorinated polyvinyl chloride pipes. The study showed that the iron pipe surface dramatically influenced the composition, activity, and disinfection resistance of biofilm bacteria.
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result sql = A pilot study of bacteriological population changes through potable water treatment and distribution.
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char = p;code = 112
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char = i;code = 105
char = n;code = 110
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char = t;code = 116
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char = e;code = 101
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char = h;code = 104
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char = e;code = 101
char = l;code = 108
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char = b;code = 98
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char = a;code = 97
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char = l;code = 108
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char = r;code = 114
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char = a;code = 97
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char = i;code = 105
char = c;code = 99
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char = m;code = 109
char = a;code = 97
char = t;code = 116
char = t;code = 116
char = e;code = 101
char = r;code = 114
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char = (;code = 40
char = B;code = 66
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char = M;code = 77
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char = ;code = 32
char = o;code = 111
char = r;code = 114
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char = l;code = 108
char = o;code = 111
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char = ;code = 32
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char = e;code = 101
char = l;code = 108
char = s;code = 115
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char = f;code = 102
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char = B;code = 66
char = O;code = 79
char = M;code = 77
char = ;code = 32
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char = c;code = 99
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char = a;code = 97
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char = l;code = 108
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char = o;code = 111
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char = i;code = 105
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char = a;code = 97
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char = l;code = 108
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char = a;code = 97
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char = s;code = 115
char = p;code = 112
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char = c;code = 99
char = t;code = 116
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char = v;code = 118
char = e;code = 101
char = l;code = 108
char = y;code = 121
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char = .;code = 46
char = ;code = 32
char = T;code = 84
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = M;code = 77
char = i;code = 105
char = c;code = 99
char = r;code = 114
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char = i;code = 105
char = a;code = 97
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char = d;code = 100
char = e;code = 101
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char = i;code = 105
char = f;code = 102
char = i;code = 105
char = c;code = 99
char = a;code = 97
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char = o;code = 111
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char = S;code = 83
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char = s;code = 115
char = t;code = 116
char = e;code = 101
char = m;code = 109
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char = f;code = 102
char = o;code = 111
char = r;code = 114
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char = f;code = 102
char = a;code = 97
char = t;code = 116
char = t;code = 116
char = y;code = 121
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char = a;code = 97
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char = d;code = 100
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char = a;code = 97
char = n;code = 110
char = a;code = 97
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char = y;code = 121
char = s;code = 115
char = i;code = 105
char = s;code = 115
char = ;code = 32
char = w;code = 119
char = a;code = 97
char = s;code = 115
char = ;code = 32
char = u;code = 117
char = t;code = 116
char = i;code = 105
char = l;code = 108
char = i;code = 105
char = z;code = 122
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = i;code = 105
char = s;code = 115
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char = s;code = 115
char = t;code = 116
char = u;code = 117
char = d;code = 100
char = y;code = 121
char = ;code = 32
char = t;code = 116
char = o;code = 111
char = ;code = 32
char = i;code = 105
char = d;code = 100
char = e;code = 101
char = n;code = 110
char = t;code = 116
char = i;code = 105
char = f;code = 102
char = y;code = 121
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char = a;code = 97
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char = l;code = 108
char = a;code = 97
char = r;code = 114
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char = e;code = 101
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char = n;code = 110
char = u;code = 117
char = m;code = 109
char = b;code = 98
char = e;code = 101
char = r;code = 114
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char = o;code = 111
char = f;code = 102
char = ;code = 32
char = o;code = 111
char = r;code = 114
char = g;code = 103
char = a;code = 97
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char = i;code = 105
char = s;code = 115
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char = s;code = 115
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char = 1;code = 49
char = ,;code = 44
char = 4;code = 52
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char = 0;code = 48
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char = t;code = 116
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char = d;code = 100
char = e;code = 101
char = t;code = 116
char = e;code = 101
char = r;code = 114
char = m;code = 109
char = i;code = 105
char = n;code = 110
char = e;code = 101
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char = p;code = 112
char = o;code = 111
char = p;code = 112
char = u;code = 117
char = l;code = 108
char = a;code = 97
char = t;code = 116
char = i;code = 105
char = o;code = 111
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char = ;code = 32
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char = a;code = 97
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char = e;code = 101
char = s;code = 115
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char = i;code = 105
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char = b;code = 98
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char = c;code = 99
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char = e;code = 101
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char = i;code = 105
char = o;code = 111
char = n;code = 110
char = a;code = 97
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char = l;code = 108
char = y;code = 121
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char = a;code = 97
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char = d;code = 100
char = ;code = 32
char = b;code = 98
char = i;code = 105
char = o;code = 111
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char = o;code = 111
char = g;code = 103
char = i;code = 105
char = c;code = 99
char = a;code = 97
char = l;code = 108
char = l;code = 108
char = y;code = 121
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char = t;code = 116
char = r;code = 114
char = e;code = 101
char = a;code = 97
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char = e;code = 101
char = d;code = 100
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char = w;code = 119
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char = e;code = 101
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char = d;code = 100
char = ;code = 32
char = b;code = 98
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char = i;code = 105
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char = a;code = 97
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char = a;code = 97
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char = i;code = 105
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char = s;code = 115
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char = a;code = 97
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char = s;code = 115
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char = a;code = 97
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char = a;code = 97
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char = t;code = 116
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char = a;code = 97
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char = i;code = 105
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char = d;code = 100
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char = p;code = 112
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char = t;code = 116
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char = e;code = 101
char = a;code = 97
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char = a;code = 97
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char = b;code = 98
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char = ,;code = 44
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char = s;code = 115
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char = e;code = 101
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char = c;code = 99
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char = p;code = 112
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char = i;code = 105
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char = e;code = 101
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char = e;code = 101
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char = m;code = 109
char = i;code = 105
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char = a;code = 97
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char = f;code = 102
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char = l;code = 108
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char = n;code = 110
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char = e;code = 101
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char = i;code = 105
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char = P;code = 80
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char = c;code = 99
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char = a;code = 97
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char = r;code = 114
char = e;code = 101
char = e;code = 101
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char = a;code = 97
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char = c;code = 99
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char = e;code = 101
char = a;code = 97
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char = e;code = 101
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char = i;code = 105
char = f;code = 102
char = t;code = 116
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char = a;code = 97
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char = a;code = 97
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char = p;code = 112
char = o;code = 111
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char = i;code = 105
char = t;code = 116
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char = b;code = 98
char = a;code = 97
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char = e;code = 101
char = r;code = 114
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char = a;code = 97
char = .;code = 46
char = ;code = 32
char = R;code = 82
char = e;code = 101
char = m;code = 109
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char = a;code = 97
char = t;code = 116
char = e;code = 101
char = r;code = 114
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char = i;code = 105
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char = s;code = 115
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char = e;code = 101
char = r;code = 114
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char = l;code = 108
char = ;code = 32
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char = e;code = 101
char = e;code = 101
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char = o;code = 111
char = n;code = 110
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char = p;code = 112
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char = s;code = 115
char = ;code = 32
char = s;code = 115
char = t;code = 116
char = i;code = 105
char = m;code = 109
char = u;code = 117
char = l;code = 108
char = a;code = 97
char = t;code = 116
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = r;code = 114
char = a;code = 97
char = t;code = 116
char = e;code = 101
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = b;code = 98
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char = o;code = 111
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char = e;code = 101
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char = m;code = 109
char = e;code = 101
char = n;code = 110
char = t;code = 116
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char = ;code = 32
char = a;code = 97
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char = d;code = 100
char = ;code = 32
char = b;code = 98
char = a;code = 97
char = c;code = 99
char = t;code = 116
char = e;code = 101
char = r;code = 114
char = i;code = 105
char = a;code = 97
char = l;code = 108
char = ;code = 32
char = l;code = 108
char = e;code = 101
char = v;code = 118
char = e;code = 101
char = l;code = 108
char = s;code = 115
char = ;code = 32
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = d;code = 100
char = i;code = 105
char = s;code = 115
char = i;code = 105
char = n;code = 110
char = f;code = 102
char = e;code = 101
char = c;code = 99
char = t;code = 116
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = i;code = 105
char = r;code = 114
char = o;code = 111
char = n;code = 110
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char = e;code = 101
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char = e;code = 101
char = d;code = 100
char = ;code = 32
char = t;code = 116
char = h;code = 104
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char = ;code = 32
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char = l;code = 108
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char = i;code = 105
char = t;code = 116
char = i;code = 105
char = o;code = 111
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char = i;code = 105
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char = ;code = 32
char = d;code = 100
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char = t;code = 116
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char = f;code = 102
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char = m;code = 109
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char = a;code = 97
char = c;code = 99
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char = e;code = 101
char = r;code = 114
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result sql = This pilot study compares the compositions of bacterial biofilms in pipe networks supplied with water containing either high levels of biodegradable organic matter (BOM) or low levels of BOM (conventionally or biologically treated, respectively). The Microbial Identification System for fatty acid analysis was utilized in this study to identify a large number of organisms (>1,400) to determine population changes in both conventionally and biologically treated water and biofilms. Data generated during this study indicated that suspended bacteria have little impact on biofilms, and despite treatment (conventional or biological), suspended microbial populations were similar following disinfection. Prechlorination with free chlorine resulted not only in reduced plate count values but also in a dramatic shift in the composition of the bacterial population to predominately gram-positive bacteria. Chlorination of biologically treated water produced the same shifts toward gram-positive bacteria. Removal of assimilable organic carbon by the biologically active filters slowed the rate of biofilm accumulation, but biofilm levels were similar to those found in conventionally treated water within several weeks. Iron pipes stimulated the rate of biofilm development, and bacterial levels on disinfected iron pipes exceeded those for chlorinated polyvinyl chloride pipes. The study showed that the iron pipe surface dramatically influenced the composition, activity, and disinfection resistance of biofilm bacteria.
Publication: Appl. Environ. Microbiol. 2000 Jan ;66(1)::268-76.
Publication Date: 2000 Jan
Study Author(s): Norton, C D;LeChevallier, M W;
Institution: American Water Works Service Company, Inc., Belleville, Illinois 62220, USA. [email protected]
Shortcut link to this study:
Publication Date: 2000 Jan
Study Author(s): Norton, C D;LeChevallier, M W;
Institution: American Water Works Service Company, Inc., Belleville, Illinois 62220, USA. [email protected]
Shortcut link to this study:
This pilot study compares the compositions of bacterial biofilms in pipe networks supplied with water containing either high levels of biodegradable organic matter (BOM) or low levels of BOM (conventionally or biologically treated, respectively). The Microbial Identification System for fatty acid analysis was utilized in this study to identify a large number of organisms (>1,400) to determine population changes in both conventionally and biologically treated water and biofilms. Data generated during this study indicated that suspended bacteria have little impact on biofilms, and despite treatment (conventional or biological), suspended microbial populations were similar following disinfection. Prechlorination with free chlorine resulted not only in reduced plate count values but also in a dramatic shift in the composition of the bacterial population to predominately gram-positive bacteria. Chlorination of biologically treated water produced the same shifts toward gram-positive bacteria. Removal of assimilable organic carbon by the biologically active filters slowed the rate of biofilm accumulation, but biofilm levels were similar to those found in conventionally treated water within several weeks. Iron pipes stimulated the rate of biofilm development, and bacterial levels on disinfected iron pipes exceeded those for chlorinated polyvinyl chloride pipes. The study showed that the iron pipe surface dramatically influenced the composition, activity, and disinfection resistance of biofilm bacteria.
PMID: 10618235
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