A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
The enrichment of swine manures through cement kiln dust incorporation
AbstractLand disposal of surplus swine manures is poorly accepted because of associated high disposal costs resulting from the low nutrient content and associated odour problems. Kiln dust contains considerable potassium and calcium, and could complement the nutrient value as well as reduce the odour level of swine manures. Cement kiln dusts and swine slurries were mixed in an attempt to improve the fertilizer value. Two total solid (TS) levels (5 and 23%) of swine slurries were mixed with kiln dusts at ratios varying from 1:2 to 4:1. Mixtures were evaluated for odour level, sieved for particle-size distribution and analyzed for fertilizer value (NH4-N, total N, and extractable Ca, P and K). Odour levels were slightly attenuated, particularly for the 5% TS slurry mixtures at manure-to-dust ratios of 1:1 and 2:1. No particle cohesion was observed from the particle-size analysis. The cement kiln dusts enriched the 5% TS swine manures by increasing the levels of extractable calcium and potassium. This enrichment was achieved at the expense of a 50–85% reduction in extractable phosphorus and 35–50% loss of total nitrogen. Nevertheless, the total fertilizer value of the 5% TS swine slurry was increased by a factor of 1·1–4·5.
The enrichment of swine manures through cement kiln dust incorporation
AbstractLand disposal of surplus swine manures is poorly accepted because of associated high disposal costs resulting from the low nutrient content and associated odour problems. Kiln dust contains considerable potassium and calcium, and could complement the nutrient value as well as reduce the odour level of swine manures. Cement kiln dusts and swine slurries were mixed in an attempt to improve the fertilizer value. Two total solid (TS) levels (5 and 23%) of swine slurries were mixed with kiln dusts at ratios varying from 1:2 to 4:1. Mixtures were evaluated for odour level, sieved for particle-size distribution and analyzed for fertilizer value (NH4-N, total N, and extractable Ca, P and K). Odour levels were slightly attenuated, particularly for the 5% TS slurry mixtures at manure-to-dust ratios of 1:1 and 2:1. No particle cohesion was observed from the particle-size analysis. The cement kiln dusts enriched the 5% TS swine manures by increasing the levels of extractable calcium and potassium. This enrichment was achieved at the expense of a 50–85% reduction in extractable phosphorus and 35–50% loss of total nitrogen. Nevertheless, the total fertilizer value of the 5% TS swine slurry was increased by a factor of 1·1–4·5.
The enrichment of swine manures through cement kiln dust incorporation
Barrington, S.F. (author) / MacKenzie, A.F. (author)
Biological Wastes ; 29 ; 1-10
1988-11-08
10 pages
Article (Journal)
Electronic Resource
English
British Library Online Contents | 1995
Online Contents | 1995
| British Library Online Contents | 1995
| British Library Online Contents | 1993