| 摘要 |
<p>1359342 Treating waste liquid ENVIRONMENT ONE CORP 19 April 1971 [11 March 1970] 57073/73 Divided out of 1359341 Heading C1C The subject matter is substantially the same as that disclosed in Specification 1,359,341 but the claims are directed to a method of treating waste liquid in which the waste liquid is aerated, treated with a flocculant and settled in a single tank, the resultant supernatant liquid is discharged into a storage tank, and any sludge which has settled out above a predetermined level in the single tank is discharged to another tank in which the sludge is further settled to produce a supernatant liquid which is recycled to the single tank.</p> |
