TECHNOLOGY FOCUS - BIOLOGY - Preferred Components: The Streptomyces species is selected from Streptomyces roseosporus, Streptomyces griseus, Streptomyces albus, Streptomyces peucetius, Streptomyces aureofaciens, Streptomyces lividans, Streptomyces coelicolor, Streptomyces hygroscopicus, Streptomyces avermitilis, and Streptomyces lydicus. The bacterial cells are genetically modified to express an endogenous or exogenous gene encoding diacylglycerol acyltransferase (EC 2.3.1.20) and/or 3-ketoacyl-acyl carrier protein synthase III (FabH) (EC: 2.3.1.41). The bacterial cells are made deficient in producing bioactive metabolites, such as antibiotic agents. The bacterial cells are genetically modified to express at least one gene of the lipid synthesis pathway. The bacterial cells are genetically modified to express at least one of genes selected from sequence containing 1860 base pairs as given in the specification (SEQ ID NO:1) and/or sequence containing 1380 base pairs as given in the specification (SEQ ID NO: 2); the closest homolog of the genes in a Streptomyces species; a nucleotide sequence which hybridizes to at least one of genes or homologs under stringent conditions; a nucleotide sequence causing the same or an equivalent function as gene products ID 101096381 or ID 101101330; a nucleotide sequence encoding an amino acid sequence showing at least 60% identity to sequence containing 446 amino acids as given in the specification (SEQ ID NO: 3) or sequence containing 335 amino acids as given in the specification (SEQ ID NO: 4). The host (H1) is selected from Streptomyces roseosporus and Streptomyces albus.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The organic waste(s) or residue(s) comprise(s) industrial organic waste(s) or residue(s), agricultural organic waste(s) or residue(s), municipal waste(s) or microbial waste(s) and/or residue(s). Preferred Process: In the process (P1), the cultivation medium comprises as an additional carbon source glycerol, a fraction from sugar or starch industry, sugar or starch syrup(s) and/or purified sugar(s). The cultivation medium comprises lipase inhibitors. The amount of triacylglycerols in the spent cultivation medium is at least 1 g/l. The cultivation medium is non-sterile or pasteurized. EXAMPLE - No suitable example given.