Abstract
Sludge is rich in nitrogen, phosphorus, and other nutrients, and its resource recycling in agriculture has become a research focus. However, heavy metals in sludge seriously hinder its reuse. Hence, how to handle heavy metals effectively becomes a problem that must be solved in sludge treatment and disposal. Microorganisms have been found to remediate heavy metals by many mechanisms. Owing to its advantages of low cost, low impact on the environment, and high efficiency, microbial remediation has attracted more attention. However, in a solid environment, there is a limitation that microbial agents cannot be extracted from the environment. Therefore a novel microbial remediation method is proposed to solve the limited application in sludge. This is meaningful for sludge recycling in terms of economy, efficiency, and environmental safety.
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