As mentioned above, the varying ratios of swill, domestic garbage, and sludge with coal and grass could achieve an expected combustion condition with a stable temperature. NOx, as one of typical emission during solid waste combustions, was investigated, the results are presented in Table 3, it should be noted that the NOx emissions in Table 3 refer to a basis of 11% Oxygen or in flue gas. According to the pollution control standard for hazardous wastes incineration (GB 18484-2001) in China, the emission limit for NOx is 500 mg/m at 11% Oxygen in flue gas. Obviously, Nox emissions from Fuel-A and Fuel-B combustions are over the emission limits, while that of the other solid waste mixtures combustion satisfy the limits. This could be explained by considering a relative high furnace temperatures for Fuel-A and Fuel-B combustion when compared to other fuel mixture combustions, as shown in Figure 2, which means that the NOx emissions could be controlled and reduced by modifying solid waste mixture ratios.