用于猪粪污水固体分离的静态重力筛-滚压压榨组合式分离器与聚丙烯酰胺辅助重力带式浓缩机系统的比较。

Comparison of a static gravity screen-roll press combination separator to a PAM-assisted gravity belt thickener system for swine waste slurry solids separation.

作者信息

Walker Paul, Kelley Tim

机构信息

Department of Agriculture, College of Applied Science and Technology, Illinois State University, Normal, IL 61790, USA.

出版信息

Bioresour Technol. 2005 Mar;96(5):571-6. doi: 10.1016/j.biortech.2004.06.011.

DOI:10.1016/j.biortech.2004.06.011

PMID:15501664

Abstract

Liquid effluent resulting from solids separation from raw swine slurry (RS) using a static gravity screen-roll press separator (SE) and a polyacrylamide (PAM) flocculant-assisted gravity belt thickener system (BE1 and 2, with BE2 designating an added belt thickening of SE) were compared. Effluent pH was 7.6-7.7. Dissolved oxygen was less than 0.01 mg/l in RS and SE and 0.50 mg/l in BE1 and 2. Solids dry weight and total phosphorus concentrations were reduced significantly (p0.05) in SE (17-27%) and in BE1 and 2 (92-96%), relative to RS. Phosphorus concentration reductions were higher than those previously found. Settleable and suspended solids, total nitrogen and chemical oxygen demand were significantly reduced in BE1 and 2 (63-99%). No significant differences (p>0.05) were found between BE1 and 2. Results indicated that the gravity belt thickener system was more efficient at solids separation than the screen-roll press system.

摘要

对使用静态重力筛网压滤机分离器（SE）和聚丙烯酰胺（PAM）絮凝剂辅助重力带式浓缩系统（BE1和BE2，其中BE2表示在SE基础上增加的带式浓缩）从生猪原粪浆（RS）中进行固体分离产生的液体流出物进行了比较。流出物pH值为7.6 - 7.7。RS和SE中的溶解氧小于0.01mg/l，BE1和BE2中的溶解氧为0.50mg/l。相对于RS，SE（17 - 27%）以及BE1和BE2（92 - 96%）中的固体干重和总磷浓度显著降低（p<0.05）。磷浓度降低幅度高于先前发现的水平。BE1和BE2中的可沉降和悬浮固体、总氮和化学需氧量显著降低（63 - 99%）。BE1和BE2之间未发现显著差异（p>0.05）。结果表明，重力带式浓缩系统在固体分离方面比筛网压滤机系统更有效。