A Discussion of the Prevailing Theories And Practices Relating to Sewage Disposal
A Discussion of the Prevailing Theories And Practices Relating to Sewage Disposal
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In the eight or more cities in this country where the sewage is purified by chemical precipitation, nearly all use lime and either alum or a salt of iron.
The amount of chemicals necessary to be used in practice depends very much upon the chemical jv, ^v^5s *r SEWAGE DISPOSAL.
characteristics of the sewage. There are instances where it is necessary to vary during each day the amount of chemicals that may be necessary for precipitation, because of the varying acidity of the sewage produced by oc...casional discharges of acids from manufactories.
The experiments that have been made at the Experimental Station at Lawrence, Mass. , in precipitating the solids from sewage have given the following results : i. With respect to the amount and cost of chemicals : " The experiments indicate that a certain defi- nite amount of lime gives as good or a better result than either more or less, and that in gen- eral the more copperas, ferric sulphate, or alum used the better the result ; and that ferric sul- phate and alum usually require no lime for com- plete precipitation, while with copperas a definite amount of lime must be used.
What to read after A Discussion of the Prevailing Theories And Practices Relating to Sewage Disposal?
You can find similar books in the "Read Also" column, or choose other free books by Wynkoop Kiersted to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
In the eight or more cities in this country where the sewage is purified by chemical precipitation, nearly all use lime and either alum or a salt of iron.
The amount of chemicals necessary to be used in practice depends very much upon the chemical jv, ^v^5s *r SEWAGE DISPOSAL.
characteristics of the sewage. There are instances where it is necessary to vary during each day the amount of chemicals that may be necessary for precipitation, because of the varying acidity of the sewage produced by oc...casional discharges of acids from manufactories.
The experiments that have been made at the Experimental Station at Lawrence, Mass. , in precipitating the solids from sewage have given the following results : i. With respect to the amount and cost of chemicals : " The experiments indicate that a certain defi- nite amount of lime gives as good or a better result than either more or less, and that in gen- eral the more copperas, ferric sulphate, or alum used the better the result ; and that ferric sul- phate and alum usually require no lime for com- plete precipitation, while with copperas a definite amount of lime must be used.
What to read after A Discussion of the Prevailing Theories And Practices Relating to Sewage Disposal?
You can find similar books in the "Read Also" column, or choose other free books by Wynkoop Kiersted to read onlineMoreLess
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