Notice of RetractionEffects of Magnesium Salt on the Anaerobic Gas Production of Modified Sludge

Notice of Retraction

After careful and considered review of the content of this paper by a duly constituted expert committee, this paper has been found to be in violation of IEEE´s Publication Principles.

We hereby retract the content of this paper. Reasonable effort should be made to remove all past references to this paper.

The presenting author of this paper has the option to appeal this decision by contacting TPII@ieee.org.

Nowadays, the magnesium salt curing agent has been widely used in the treatment of sludge. In this study, the sludge obtained from the north-central sewage treatment plant in Taiyuan Hexi was modified with different levels of magnesium salt. The effects of the magnesium salt curing agent on the gas production of the modified sludge were investigated. The experimental results showed that, adding magnesium salt curing agent into sludge could inhibit the anaerobic gas production significantly. There is no direct relationship between the adding ratio of magnesium salt and gas production amount. However, the adding ratio of magnesium salt has significant effects on the quality of the sludge. The higher the adding ratio of magnesium salt was, the lower the value of the total carbon, organic matter, and total nitrogen was. The immobilization effect of magnesium salt made the anaerobic bacteria could not get enough energy from the sludge for gas production. The increased pH of the sludge after modification was not suitable for the growth of anaerobic bacteria. The low moisture content of the modified sludge baffled the transferring of nutrients and bacteria to produce gas.