发明名称 |
Method for activated sludge wastewater treatment with high dissolved oxygen levels |
摘要 |
An activated sludge wastewater treatment method is provided. The disclosed method includes: receiving a stream of wastewater into a mixed liquor in an uncovered activated sludge basin; introducing high purity oxygen to the mixed liquor in the activated sludge basin to produce euoxic conditions (i.e. a dissolved oxygen level in the range of between about 5 mg to 15 mg) in the activated sludge basin; passing a portion of the mixed liquor in the activated sludge basin through a clarifier to separate activated sludge and produce an effluent stream and an activated sludge stream; and recycling a portion of the activated sludge stream to the activated sludge basin to produce a mixed liquor having a solids loading of between about 3000 mg and about 10000 mg of suspended solids per liter of mixed liquor and a solids retention time of between about 7 days and 40 days.
|
申请公布号 |
US7699986(B2) |
申请公布日期 |
2010.04.20 |
申请号 |
US20080117791 |
申请日期 |
2008.05.09 |
申请人 |
PRAXAIR TECHNOLOGY, INC. |
发明人 |
NOVAK RICHARD A.;FABIYI MALCOLM;GUPTA AMITABH |
分类号 |
C02F3/00 |
主分类号 |
C02F3/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|