发明名称 |
Homogeneous enriched biosolids product and process of bio-nutrient granulation for making same |
摘要 |
A nutrient enriched biosolids fertilizer product including dried granules or pellets of a homogeneous mixture of biosolids and nutrients selected from the group consisting of nitrogen, phosphorus and potassium compounds resulting in a NPK assay of 4 to 15 N-1 to 10 P-4 to 15 K, and a process for producing a fertilizer including the following steps: 1) mixing wet sewage sludge cake with nutrients selected from nitrogen, phosphorus and potassium compounds, in a mixer together with recycled dried granules or pellets of biosolids fertilizer product to form a dryer homogeneous mixture; 2) granulating or pelletizing the dryer homogeneous mixture to result in granules or pellets; 3) drying the granules or pellets of homogeneous mixture to result in dried granules or pellets of the biosolids fertilizer product; and 4) recycling a portion of dried granules or pellets of homogeneous mixture to the mixer. |
申请公布号 |
US9061948(B2) |
申请公布日期 |
2015.06.23 |
申请号 |
US201313942525 |
申请日期 |
2013.07.15 |
申请人 |
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发明人 |
Wiseman Terry L.;Lambalot, Jr. Robert E.;Harris Clyde J.;Cochran Keith D.;Holt Timothy G.;Peeden Gregory S. |
分类号 |
C05F7/00;C05B7/00;C05B17/00;C05C3/00;C05C9/00;C05D9/02;C05F11/00 |
主分类号 |
C05F7/00 |
代理机构 |
Manelli Selter PLLC |
代理人 |
White, Jr. Paul E.;Manelli Selter PLLC |
主权项 |
1. A process for producing a nutrient enriched biosolids fertilizer comprising the following steps:
A) premixing wet sewage sludge cake with liquid or solid plant nutrients selected from the group consisting of nitrogen compounds, phosphorus compounds and potassium compounds, in a first mixer to form a homogeneous mixture; B) mixing the homogeneous mixture from the first mixer in a second mixer together with recycled dried granules or pellets of biosolids fertilizer product of step E to form a dryer homogeneous mixture; C) granulating or pelletizing the dryer homogeneous mixture to result in granules or pellets; D) drying the granules or pellets of homogeneous mixture to result in dried granules or pellets of the biosolids fertilizer product; and E) recycling a portion of dried granules or pellets of homogeneous mixture to the second mixer. |
地址 |
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