190 Organic waste recycling: technology and management
Remedy a) Open the valve. b) Clean the tap. c) Remove the condensate. a) First gas should not be burned as air may be mixed with it and could explode. Also, frequently the first gas produced in winter has a high percentage of CO. 2
b) Air should be allowed to escape until there is a definite smell of gas.Cause a) Main valve is closed. b) Gas tap is blocked. c) Burner or pipe is completely blocked by condensate. a) Wrong kind of gas. b) Air in the gas pipe. a) Presence of undigested vegetable matter (e.g. straw, water hyacinth or coarse dung such as elephant dung), animal bedding (e.g. straw, sawdust),animal clothing (e.g. pig hair, chicken feathers) and not properly broken dung. b) Slurry not properly mixed. c) Mixing the slurry to disperse the floating material.Table 4.19 Problems with the operation of the biogas plant (adapted from Tata Energy Research Institute 1982) (continued) Problem 5. No gas at the burner. 6. First gas produced will not burn. 7. Formation of scum.