By J. E. Hall
Advances within the creation of sewage sludge were such a success of overdue that the excess has flooded the industry, and threatens our basements and rivers. What to do, now that there's no position to throw it away? dozen papers from a world convention on the U. of York (England) in Sept
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Extra resources for Alternative Uses for Sewage Sludge. Proceedings of a Conference Organised by WRc Medmenham and Held at the University of York, UK on 5–7 September 1989
I. D. Pulford and H J. Duncan (1987). Studies on the oxidation of pyrite in colliery spoil. II. Inhibition of the oxidation by amendment treatments. Reclamation and Revegetation Research, 6, 1-11. (6) Topper, K. F. and B. R. Sabey (1986). Sewage sludge as a coal mine spoil amendment for revegetation in Colorado. J. Environmental Quality, 75, 44-49. (7) Sopper, W. E. and E. M. Seaker (1984). Use of municipal sewage sludge to reclaim mined land. CRC Critical Reviews in Environmental Control, 73, 227-271.
They compare favourably with estimates of 1 to 34 x 106/g reported for undisturbed soils (11, 12,13, 14, 15). 33 W. E. Sopper Table 12. Concentrations and amounts of trace metals (dry weight) applied to the site compared to the PDER interim guidelines for maximum trace element loading for land reclamation. 05 to 9 x 105/g (13, 14,15,16, 17). Fungal numbers were 3 to 4 times higher on Site 1 than on the older sites, and were greatly increased on all sludge-amended sites compared to the fertiliser-amended site.
9 in about four months (1977). 9 in 1978,1979 and 1981, respectively and the higher pH was maintained. 5. 5. Spoil samples were also analysed for trace metals. A comparison of trace metal concentrations before and after sludge was applied is given in Table 6. Even at the highest sludge application rate (184 t/ha), the trace metal concentrations in the surface spoil (0 to 15 cm) were only slightly increased. In general, the trace metal concentrations in the spoil were all extremely low in comparison to published normal ranges for soils.
Alternative Uses for Sewage Sludge. Proceedings of a Conference Organised by WRc Medmenham and Held at the University of York, UK on 5–7 September 1989 by J. E. Hall