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.
n. someone who takes the law into his/her own hands by trying and/or punishing another person without any legal authority. In the 1800s groups of vigilantes dispensed frontier justice by holding trials of accused horse-thieves, rustlers and shooters, and then promptly hanging the accused if convicted.. A mother who shoots the alleged molester of her child is a vigilante.