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<http://webisa.webdatacommons.org/60189824>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<patents.com> .
<http://webisa.webdatacommons.org/60189824>	<http://www.w3.org/ns/prov#value>	"The biosolids pH is depressed by an acidic material such as mineral or organic acid by mixing a sufficient quantity of acid to depress the pH of the mixture to less than 5." .
<http://webisa.webdatacommons.org/prov/455953783>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/60189824> .