公开(公告)号：US20200062629A1

公开(公告)日：2020-02-27

申请号：US16612010

申请日：2018-05-09

Applicant: BL TECHNOLOGIES, INC.

Inventor： Michael David THEODOULOU ,  Dorian HARRISON ,  Marion DEBACKER

IPC: C02F11/18 ,  C02F11/04 ,  C02F3/28

Abstract: Sludge, for example primary sludge or waste activated sludge or both from a wastewater treatment plant, is pre-treated prior to anaerobic digestion. The pre-treatment includes an optuional mechanical treatment to reduce the viscosity of the sludge and a biological hydrolysis treatment. The biological hydrolysis treatment may be performed in a series of reactors some of which are maintained at a temperature in the range of 50 to 70° C. The reactors provide a combined residence time in the range of 0.5 to 6 days. Optionally, measurements of the pH of the sludge during or after biological hydrolysis, or the production of biogas from a downstream anaerobic digester, may be considered in adjusting the temperature of one or more of the biological hydrolysis reactors.