analysis of a pilot-scale anaerobic baffled reactor treating domestic ...

Table 2.3 Effluent characteristics from septic tanks (before being discharged e.g. to soak-away)
pH Flow
ℓ/d
E. Coli
log (cfu/100
mℓ)
Oil and
grease
mg/ℓ
TP
mgP/ℓ
TKN
mgN/ℓ
TSS
mg/ℓ
COD
mg/ℓ
BOD
mg/ℓ
No. of
samples
Type Location No. of tanks/
homes
Study
Ref
1 cluster Texas, USA 9 266 29.5 8.2 5.0 7.4
7 150 138 327 49 45 13 3.6
2 domestic Wisconsin,
USA
3 cluster Wisconsin,
90 168 338 85 63.4 8.1 6.3 6.8-7.4 140
USA
4 domestic Wisconsin, USA 33 140-215 132 445 87 82 21.8 5.5
5 domestic Oregon, USA 8 56 217 146 57.1 5.4
6a cluster Oregon, USA 11 157 276 36 41 65 6.4-7.2 150-230
6b cluster Oregon, USA Small
118 228 52 50 16 6.4-7.2 180
community
6c cluster California, USA 330 189 284 75 22 6.5-7.8 150-220
7 domestic Florida 8 36 141 161 39 11 36 4.1-7.2
8 domestic Florida 1 3 179 59 66 17 37 6.0
14.2 6.6 6.8
9 domestic SW Cape, RSA 26
(DOC)
10 1 domestic Australia 330 660 250 36 6
10. Charles, 2004
7. Ayres Associates, 1993
8. Ayres Associates, 1996
4. Harkin et al., 1979
5. Ronayne et al., 1982
1. Brown et al., 1977
2. University of Wisconsin 1978
9. Wright, 1999
6. Bowne, 1982
3. Otis, 1978
1 80 th percentile values are reported, i.e. 80% of systems sampled had measured values equal to or less than reported value.
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