Preparation method of controlled-release carbon source composite particles for use in biological nitrogen removal by denitrification
A composite particle and denitrification technology, applied in the field of water treatment, can solve the problems of easy collapse and poor controlled release, and achieve the effects of simple steps, increased adhesion area and excellent mechanical properties
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[0017] Example 1
[0018] Prepare the controlled-release carbon source composite particles for biological denitrification and denitrification according to the following method:
[0019] (1) Mix the components with the following mass ratios: 400g polylactic acid, 1000g walnut shell, 592g high-density polyethylene, 4g maleic anhydride, 1g sodium carbonate, 1g erythorbic acid, and 2g trace element mixture in a mechanical mixer. Evenly.
[0020] (2) The mixture in step (1) is injected into the twin-screw extruder from the feed port for melt blending, the extrusion temperature is 160° C., and the mixture is cut into pellets by a pelletizer.
[0021] (3) The granules prepared in step (2) are steamed in boiling water for 10 minutes, and set aside.
[0022] The denitrification performance of the controlled-release carbon source composite particles prepared by the above steps is tested below through experiments.
[0023] Put the controlled-release carbon source composite particles and activated ...
Example Embodiment
[0024] Example 2
[0025] Prepare the controlled-release carbon source composite particles for biological denitrification and denitrification according to the following method:
[0026] (1) The following mass ratios of the components: 1400g polybutylene succinate, 200g hemp fiber, 391g polystyrene, 2g maleic anhydride, 1g sodium carbonate, 1g erythorbic acid, 5g trace element mixture Mix well in a mechanical stirrer.
[0027] (2) The mixture in step (1) is injected into the twin-screw extruder from the feed port for melt blending, the extrusion temperature is 180° C., and the mixture is cut into pellets by a pelletizer.
[0028] (3) The granules prepared in step (2) are steamed in boiling water for 10 minutes, and set aside.
[0029] The denitrification performance of the controlled-release carbon source composite particles prepared by the above steps is tested below through experiments.
[0030] Put the controlled-release carbon source composite particles and activated sludge into a fl...
Example Embodiment
[0031] Example 3
[0032] Prepare the controlled-release carbon source composite particles for biological denitrification and denitrification according to the following method:
[0033] (1) The components in the following mass ratios: 800g polybutylene succinate, 400g walnut shell, 790g polystyrene, 2g maleic anhydride, 2g sodium bicarbonate, 1g erythorbic acid, 5g trace element mixture Mix well in a mechanical stirrer.
[0034] (2) The mixture in step (1) is injected into the twin-screw extruder from the feed port for melt blending, the extrusion temperature is 180° C., and the mixture is cut into pellets by a pelletizer.
[0035] (3) The granules prepared in step (2) are steamed in boiling water for 10 minutes, and set aside.
[0036] The denitrification performance of the controlled release carbon source composite particles prepared by the above steps is tested by experiments below, see figure 1 , figure 2 .
[0037] Put the controlled-release carbon source composite particles and ...
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