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What is the reason for nitrogen content increasing while adding crabs hell to the vermicompost manure? 


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The increase in nitrogen content when adding crab shell to vermicompost manure can be attributed to the transformation processes during composting. Studies have shown that the addition of different microbial agents during composting can lead to changes in nitrogen content. Additionally, the inoculation of bacteria genera like Azotobacter in vermicompost can significantly increase nitrogen content over time. Furthermore, vermicomposting with agricultural by-products has been found to enhance total nitrogen levels in the final product. These findings suggest that the introduction of specific additives or microbial agents, such as crab shell or beneficial bacteria, can promote nitrogen enrichment in vermicompost, contributing to its quality and nutrient content.

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What could be the cause of high nitrogen in faecal sludge?5 answersThe high nitrogen content in faecal sludge could be caused by several factors. One possible cause is the volatilization and removal of nitrogen during the sludge drying process. Another factor could be the improper handling of waste, such as the use of excessive mineral nitrogen fertilizers in agriculture, which can contaminate the environment with nitrate or contribute to global warming through nitrous oxide emissions. Additionally, fast pyrolysis of sewage sludge can release nitrogenous gases, such as NH3, due to the high protein content in the sludge. On the other hand, composting and vermicomposting of sewage sludge under optimal conditions can help reduce nitrogen emissions into the environment. Overall, these factors contribute to the high nitrogen content in faecal sludge.
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