Device for preparing fertilizer by using excess sludge and agricultural and forestry waste
A technology for preparing agricultural and forestry wastes and fertilizers, which is applied in the field of solid waste resource utilization devices, can solve the problems of slow growth and reproduction of microorganisms, insufficient nutrients, limited humus, etc., and achieve shortened composting cycle, comprehensive nutrients, and low bacteria and virus content Effect
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[0024] Example 1: Using sludge from the remaining workshop of a municipal sewage treatment plant in Hanzhong City and sawdust from a wood processing plant in Hanzhong City as raw materials, the remaining sludge has a moisture content of 85.32%, a pH value of 6.8, and an organic content of 72.52% (anhydrous Sludge mass percentage), TN content is 10.28% (anhydrous sludge mass percentage), TP content is 0.54% (anhydrous sludge); the measured cellulose content of wood chips is 68.18%, of which hemicellulose content is 7.46% . During the experiment, the organic fertilizer was prepared by adding the wood chips to the remaining sludge at a mass ratio of 1:1. The experiment found that under the condition of a blast volume of 1.8L / (Kg·min), the aerobic fermentation time was 10 days and the facultative fermentation time was 8d, the anaerobic fermentation time was 6d, the measured content of humus in the compost product was 63.44% (the mass percentage of the dried product at 105°C), the T...
Example Embodiment
[0025] Example 2: Using the remaining workshop sludge of a municipal sewage treatment plant in Hanzhong City and sawdust from a wood processing plant in Hanzhong City as raw materials, the remaining sludge has a moisture content of 87.55%, a pH value of 6.6, and an organic content of 75.10% (anhydrous Sludge mass percentage), TN content is 11.32% (anhydrous sludge mass percentage), TP content is 0.69% (anhydrous sludge); the measured cellulose content of wood chips is 71.53%, of which hemicellulose content is 8.56% . During the experiment, the organic fertilizer was prepared by adding the wood chips to the remaining sludge at a mass ratio of 1:1. The experiment found that under the condition of a blast volume of 1.8L / (Kg·min), the aerobic fermentation time was 10 days and the facultative fermentation time was 8d, the anaerobic fermentation time was 6d, the measured humus content of the compost product was 62.26% (the mass percentage of the product dried at 105°C), the TN conten...
Example Embodiment
[0026] Example 3: Using sludge from the remaining workshop of a municipal sewage treatment plant in Hanzhong City and sawdust from a wood processing plant in Hanzhong City as raw materials, the remaining sludge has a moisture content of 87.55%, a pH of 6.6, and an organic content of 75.10% (anhydrous Sludge mass percentage), TN content is 11.32% (anhydrous sludge mass percentage), TP content is 0.69% (anhydrous sludge); the measured cellulose content of wood chips is 71.53%, of which hemicellulose content is 8.56% . During the experiment, the organic fertilizer was prepared by adding the wood chips to the remaining sludge at a mass ratio of 1:1. The experiment found that under the condition of a blast volume of 1.8L / (Kg·min), the aerobic fermentation time was 8 days, and the facultative fermentation time was 8d, the anaerobic fermentation time is 8d, the measured humus content of the compost product is 68.25% (the mass percentage of the dried product at 105℃), the TN content is...
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