Industry Info

How to correctly regulate the pH value of organic fertilizer equipment during fermentation

2020/09/18
Organic fertilizer production equipment will be affected by many factors when processing and producing fertilizer, including the carbon nitrogen ratio, moisture, particle size and pH value of compost. Unsuitable pH value will affect the reproduction, decomposition and survival of fermentation bacteria. Neutral or alkaline environment is conducive to the reproduction, decomposition and survival of fermentation bacteria. We will explain in detail how to adjust and control pH value correctly when organic fertilizer equipment ferments.

The suitable living environment for bacteria and actinomycetes is neutral or slightly alkaline, while fungi like acid. During the fermentation of organic wastes such as faeces, some organic acids are released when bacteria and fungi decompose and digest organic matters. Organic acids continuously ferment in manure and other organic wastes, which will form the accumulation of organic acids and reduce the pH value of fermentation materials. The pH environment is suitable for the reproduction and decomposition of fungi and the degradation of wood and fiber in fermentation materials. With the further degradation of organic acids by fermentation bacteria, the pH value of fermentation materials slowly began to increase. The appropriate pH environment made actinomycetes and fungi began to multiply, decompose and ferment and mature faster. After fermentation, the raw materials were granulated with organic fertilizer granulator.

1. The PH value is too low, which is mainly affected by too much water or too fine materials. At this time, the fermentation of organic waste such as manure will easily become anaerobic. When it becomes anaerobic, the accumulation of organic acids can make the pH value If it is lowered to less than 4.5, the activity of fermenting bacteria inside the compost is severely affected, and the activity ceases to enter dormancy or die. At this time, it is necessary to use a manure turning machine to supply oxygen to the material. After turning the material, the material is relatively ventilated, and the oxygen content is sufficient. The sufficient oxygen content can restore the PH environment of organic waste such as manure to the normal range.

2. If the PH value is too high, the activity of many fermentation bacteria will be reduced and the decomposition and reproduction of the materials will not be carried out. If it is higher than 11.5, the fermentation bacteria will begin to die in large numbers, which will denature the internal proteins of the fermentation materials and inactivate the enzyme proteins, which will affect the fermentation cycle. Affect the quality of organic fertilizer.
organic fertilizer fermentation

However, the pH value of common fermentation raw materials does not need to be adjusted. The raw materials that do not need to be adjusted include: farm manure, sewage treatment plant sludge, straw, peat, mushroom residue, etc. The pH value of normal composting fermentation environment is 5-9. If the pH value of manure is higher than 9, the pH value needs to be adjusted. Ferric chloride, alum, strong acid or compost can be added to adjust; if the pH value is lower than 4, it is usually It can be adjusted by adding lime, peat ash, etc. For compound fertilizer processing, NPK fertilizer production line adds different nutrients to adjust materials. Properly adjusting the pH value of manure fermentation can affect the fermentation environment, facilitate the growth, reproduction and decomposition of fermentation bacteria, shorten the fermentation cycle, and enhance the quality and quality of the fermentation material into organic fertilizer.
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