What method yields the quickest results when starting a digester unit?

Seeding is the method that yields the quickest results when starting a digester unit because it involves introducing a culture of microorganisms that are already acclimated to the specific conditions of the digesting environment. This introduction provides a strong initial population of microbes that can rapidly start breaking down organic matter, generating biogas, and stabilizing the sludge.

When a digester unit is started, the production of biogas and the efficient breakdown of waste are critical for optimum operation. By seeding with a healthy, active sludge from an existing digester, the new unit can overcome the lag phase typically associated with establishing microbial populations. This leads to quicker stabilization and the desired biogas production.

In comparison, shredding, dosing, and chlorinating serve different purposes in the treatment process. Shredding may help in reducing the particle size of feed material but doesn't directly introduce microorganisms. Dosing usually refers to the introduction of chemicals or additional substrates to optimize conditions but doesn't specifically relate to microbial activation. Chlorinating is a disinfection method that would hinder microbial activity, therefore not applicable to initiating digestion in a functional manner.