This liquid requires further treatment as it is high in nitrogen and phosphorus, particularly if the sludge has been anaerobically digested. The treatment can take place in the sewage treatment plant itself (by recycling the liquid to the start of the treatment process) or as a separate process.
verb (used with object), abrogated, abrogating. 1. to abolish by formal or official means; annul by an authoritative act; repeal: to abrogate a law. 2. to put aside; put an end to. Origin of abrogate. Latin.
The term surrogate is used less often, because it implies traditional surrogacy in which a woman is inseminated with the sperm of a man who is not her partner to conceive and carry a child for this man and his partner. In this form of surrogacy, the woman is giving up her own genetic child to the other couple.