A method of reducing sludge production in a wastewater treatment process by at least about 10% whilst reducing the solids and BOD in a final effluent stream; wherein the method comprises treating a wastewater stream in a wastewater treatment facility by addition of a treatment batch from a biofermentor; wherein the treatment batch is added to an anaerobic digester, to an equalization basin or to a primary clarifier of the wastewater treatment facility; wherein the wastewater treatment process comprises: directing the wastewater stream to the treatment facility, the stream having a flow of at least 75708 litres (20,000 gallons) per day, and the incoming wastewater stream having at least 50 mg/L solids and 100 mg/L BOD; removing solids and BOD from the wastewater stream in the treatment facility to provide the final effluent stream; the final effluent stream having less than 10% of the solids of the wastewater stream and less than 10% of the BOD of the wastewater stream; wherein the biofermentor is placed on-site at a wastewater treatment facility location; wherein nutrient, water and an inoculum comprising microbes is deposited into the on-site biofermentor and the inoculum is grown in the biofermentor placed on-site to provide the treatment batch comprising microbes; wherein the inoculum is grown to a concentration of approximately 10 8 -10 9 colony forming units per milliliter (cfu/ml) to achieve a preferred minimum inoculation of approximately 10 3 -10 4 cfu/ml at the point of application of the treatment batch; wherein the biofermentor includes a main tank, an input for water, an output for treatment batch, a mixing apparatus and a temperature control apparatus; wherein at least a portion of the treatment batch comprising microbes is directly applied to the contaminated wastewater, such that the microbes are not isolated, concentrated or freeze dried between the steps of growing and applying to the wastewater treatment process. directing the wastewater stream to the treatment facility, the stream having a flow of at least 75708 litres (20,000 gallons) per day, and the incoming wastewater stream having at least 50 mg/L solids and 100 mg/L BOD; removing solids and BOD from the wastewater stream in the treatment facility to provide the final effluent stream; the final effluent stream having less than 10% of the solids of the wastewater stream and less than 10% of the BOD of the wastewater stream; wherein the biofermentor is placed on-site at a wastewater treatment facility location; wherein nutrient, water and an inoculum comprising microbes is deposited into the on-site biofermentor and the inoculum is grown in the biofermentor placed on-site to provide the treatment batch comprising microbes; wherein the inoculum is grown to a concentration of approximately 10 8 -10 9 colony forming units per milliliter (cfu/ml) to achieve a preferred minimum inoculation of approximately 10 3 -10 4 cfu/ml at the point of application of the treatment batch; wherein the biofermentor includes a main tank, an input for water, an output for treatment batch, a mixing apparatus and a temperature control apparatus; wherein at least a portion of the treatment batch comprising microbes is directly applied to the contaminated wastewater, such that the microbes are not isolated, concentrated or freeze dried between the steps of growing and applying to the wastewater treatment process.