<p>Against the backdrop of addressing global climate change, the low-carbon development of the sewage treatment industry is an inevitable trend. In response to the serious contradiction between land supply and demand for a wastewater engineering, a more intensive layout scheme represents a pragmatic and effective solution. Relying on an 8000 m³/d printing and dyeing wastewater treatment project in Zhejiang, this thesis conducts a comparative study on land-saving, material-saving, energy-saving, and carbon emissions between the modular integrated materialization scheme (MIMS) and the reference scenario (RS) to evaluate the advantages of MIMS in land use efficiency and carbon emission reduction. The results show that the modular integrated scheme achieves a land footprint reduction rate of 33.9%, and the savings rates of concrete (including mortar) and steel bars are 19.4% and 16.6% respectively, with an average energy conservation rate of 14.9% for construction. Compared with the RS, the total of carbon emission reduction in the materialization of the MIMS is 2871.74tCO₂e, with an overall carbon emission reduction rate of 16.0%. Among them, the carbon emission reductions in the three stages of material production, transportation, and construction are 2654.98tCO₂e, 136.18tCO₂e, and 80.58tCO₂e respectively, and the corresponding emission reduction rates are 17.2%, 15.3%, and 14.9%. The results demonstrate the outstanding performance of MIMS in addressing both the severe limitations of available land and reducing carbon emissions during materialization, providing a basis and example for the optimal design and layout of sewage treatment projects.</p>