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<br /> . � fa*f�"�f 5 S • 3 �> s4�P�� LyF%�
<br /> . '.� P..A Y ��.:,:xFy�k .�$��t " .
<br /> �n2y 0.tS �o22utanLs x!�ich need Lb ba t�lloi►�d. � Na�LeMttl�tr� tNl�t�il�'a"� ', �,���`�k �`
<br /> :lfficult 5ectlu�! .L 1� neee�aary to mtinGtin i V!t`y !'!3/jh, ritlll�"�11��;���,tt���"
<br /> ro+hile �+�ali�g with large volumea of w�te�. . " ' � �,� '�
<br /> �H��G� ��
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<br /> The 0.tY in �raate�rat�!r thaL mu�t be �tnov►ed t!r p�ified�ltOq333lt� = x',� , �
<br /> _ o^qanic n�terial, bacteris� at�d nutri�r���. ?he ot•gsnid:"-�i�t"ia2�����idli���; �
<br /> �ometi�es called Lhe "5ioche�aical oxygd�n daaWfit�t" (BOD)�;ctom�� !��"''� � �" ';
<br /> saurces in e dorneat te wra�te►n�t�� sy�tam. Fot�d p�t'�par'ati�i�t� d�.#h`'i1�'�l�O �
<br /> .;
<br /> �shing, and �raatss from the re2atively- znef`!"�!liet�E huui�er diatsE3���q1t��` �
<br /> Ciacttargc into the dome�tie ae++age �ratiet. Tablt'8.1� �?t�ts 't.�e O�r19lt.ri��be1 `;�
<br /> of 90D, �u�pended solids� ar�! other !r.�Y.e�lala �.Yt r�ew sswags`�nd in �lptia •�1l�;�
<br /> e."t2��ent. BOD an3 suspend�f �olid� urs �rasur�sa at th�'ptt"Ost�Eaa���''�"�i�r'rt '
<br /> msterial ''ound in xastewater. ' .
<br /> PaLyogen� are microorgani�ms wbich oau�e diaeaa� �nd arrt usually prfseqL Lt
<br /> danestic sewage. Fecal coliform� are indicator� of' the pre�ence of pathogen�
<br /> ar.� Table 9. 1 . s`�ows *hat in 100 ml (about t/2 cup) of septic t±►nk effluent�
<br /> th�r� are betweea � ,�O�J a�d t milli�n. '"here �re 3bout the same numAer of
<br /> viruses in this ;'.a:,Li�y of efflupnt.
<br /> `+utrients �re par� ,f t!�e !TYIt,Pria2s in sPatic tank effluent an� a^e of co�cern
<br /> hPcausP o!' po4s:'��e Aut�ephic3tion e° q^ound or surface water� and po�sible
<br /> ^o�itaTi�a�:on or" �a:�r sup^1ti� w�lls. 'ViLrogen and phosphorus are Lhe nuLrienta
<br /> �.* rria,jor c�ncern :r. ��;�-��o tank efflue.^.t. Quantfties of these nutrients am
<br /> ::.sLed :� vario�.�s :��3tions in the soii �reaLrtrent spstem in '"ablP A. 1.
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<br /> Cne F�ot Ttirae FeeL
<br /> �,'•, Se^�:.^ Ta�k A-1ow Trenc!: R�l�w ?�enc!�
<br /> pAr'a��. ,.. _ ,,��� r`I�iL'^r1L__ __BOLtOrtI BAtLOr�
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<br /> ;�!PN/100 nl� t^� Tf 1.Iion 1 :nillian C
<br /> '�i^uaes ;Unknown� 100 thousand to 0 - 1000 0
<br /> (?�J/�1? t0 million ;
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