表
2
可持续工艺与传统污水生物处理工艺主要技术指标比较
技术参数
可持续工艺
传统工艺
O
2
消耗量
/ kgO
2
/ kgN
2
1
6
4
1
65
或
/ kgO
2
/ kgCOD
0
1
29
0
1
6
脱氮
COD
消耗量
/ kgCOD/ kgN
1
1
4
4
~
5
甲烷生产量
/ kgCH
4
/ kgCOD
0
1
28
0
剩余污泥量
/ kgSS/ kgCOD
0
1
29
0
1
4
磷酸盐回收量
/ kgP/ kgP
0
1
49
0
CO
2
释放量减少
/ %
18
0
处理水回用后处理难易程度
简单
复杂
注
:
表中数据表示去除单位质量的污染物
,
所消耗的或产生的物质
的量
,
如
0
1
48 kgP/ kgP
表示去除
1 kgP
可回收磷酸盐
(
以
P
计
) 0
1
48
kg
。
个方面均具可观的可持续性 。
4
14 工艺评估
推荐工艺中虽涉及多个处理单元 ,但象 AB 法 、
BCFS
gµ
工艺 、
污泥消化 、
磷酸盐回收等多已用于工
程实际 ,并取得了良好的运行效果 。在建筑结构方
面 ,新颖的 BCFS
gµ
工艺同心圆平面设计成为真正意
义上的“UN ITAN K”构造 。尽管 CANON 工艺仍在
研发之中 ,但试验 、
现场观察以及对其所做的数学模
拟无疑会加速它在工程中的应用 。因此 ,推荐工艺
并不存在任何技术方面的难题 。
多个处理单元被合并于推荐工艺中无疑会导致
基础建设 (工程建设与材料等) 费用增高 。然而 ,推
荐工艺之可持续性的贡献必将降低运行管理费用
(主要是电力消耗和污泥处置) 。此外 ,磷酸盐回收
与处理水回用还能带来潜在的经济价值 ,对缓解磷
与水资源危机有现实意义 ;显著减少的 CO
2
释放量
对控制温室效应也有着不可低估的积极作用 。
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Vol
1
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No
1
7
2002
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