Zur ökonomischen Bedeutung der biologischen Selbstreinigung

✍ Scribed by Tümpling, W. V.

• Publisher: John Wiley and Sons
• Year: 1985
• Tongue: English
• Weight: 377 KB
• Volume: 13
• Category: Article
• ISSN: 0323-4320
• DOI: 10.1002/aheh.19850130415

✦ Synopsis

KAEDING zum 65. Geburtsta.g gewidmet .Smz/nuiy: In t.welve flowing water (Q 1.04 ... 30.4 m"s, cnL 0.5 ... 1.7 iw's) t,he self-purificat,ion efficiency in 110 river sections ( L 1.3 .._ 26.4 km) is determined as the load difference in kg . d-1 C'OD->In as well as in g . 111-3 referred to the daily passage. In t h e wonomical comparison, the self-purification efficiency is valued as substitution for wastewater treatment plants of the same capcity. I t , a mean specific capacit,y of 8.6 g . ni-3, the self-purification efficiency of the investigated waters is equivalent t,o economical values of 124. 1OJ ... 534 . 102 31 h i -1 investment costs, 11 . 103 ... 80 . 103 M . a-'lin-l operating costs and 5 ... 81 MWh . a-J kin-1 expenditure of energy. The specific capacky in g . ni-3 COD-Ah shows an esponentia.1 regression t o the degree of saprobity (L=O.O15 esp (1.7358 . S)). Froin this empirical model the limits of the self-purification capacity of aerobic waters by osygen input can be detected: in respect,ive examples more than 50 ". 'o of the required oxygen input are due to weirs.