| 摘要 |
<p>1513651 Fertilizer pellets from sewage sludge THAMES WATER AUTHORITY 11 Feb 1977 [19 Feb 1976] 06667/76 Heading C1B Digested sewage sludge is dried to 5-25% moisture and pelleted. The sludge may be aerated to kill anaerobic bacteria. Plant nutrients may be added before pelleting.</p> |
