The kitchen press filtrate is pretreated using the process of "three-phase separation oil removal + UASB reactor + aerobic treatment". Anaerobic acidification can decompose complex macromolecular organic matter into small molecule organic acids that are acceptable to aerobic bacteria. class of substances;
The aerobic process removes odor-type substances produced in the acidification stage and removes some easily degradable organic matter. The pretreated liquid is pumped into the reactor, and nutrients such as nitrogen, phosphorus, potassium, zinc, boron, and iron are added which carry out physical hydrolysis, neutralization, chelation and other reactions to make organic liquid fertilizer.
