Soil treatment

Details Soil treatment Soil treatment

1991-01-22

1994-09-13

Lander, Ferris

Chemistry: fertilizers

Processes and products

Organic material-containing

71 25, 71 63, 71903, C05F 1700

Patent

active

053465270

ABSTRACT:
Two heretofore bothersome waste products, namely sewage sludge ash and water treatment lime, are mixed together to provide an agricultural soil treatment enhancing the nutrient value and raising the pH of the soil for improved plant growth while simultaneously minimizing the risk of wind blown ash dust. The ash is readily dryable and dusty but this feature is obscured by the water treatment lime which has a tendency to retain water. Mixing of tonnage quantities is conducted at a site near the facility generating the ash; and the mixture is transported to the agricultural soil to be treated and applied at a quantity between 2 and 70 tons of the water-containing mixture per acre of the soil. The application quantity is sufficient to raise the level of the soil-water pH of acid soil to a value of at least 6.5 but not above about 7.5 and insufficient to add to the soil more than the governmental limits for several heavy metals. Many nutrients needed for plant growth are contained in the mixture.

REFERENCES:
patent: 4028130 (1977-06-01), Webster et al.
patent: 4067716 (1978-01-01), Sterrett
patent: 4180459 (1979-12-01), Zievers
patent: 4203376 (1980-05-01), Hood
patent: 4306978 (1981-12-01), Wurtz
patent: 4354876 (1982-10-01), Webster
patent: 4902431 (1990-02-01), Nicholson et al.

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