Research Status and Development Trend of Wastewater Treatment Technology and Its Low Carbonization

Abstract

With the rapid development of the social economy, the demand for water resources is gradually increasing, and the corresponding impact of water pollution is also becoming more severe. Therefore, the technology of sewage treatment is developing rapidly, but corresponding problems also arise. The requirements of energy conservation and emissions reduction under the goal of carbon neutrality and dual carbon pose a challenge to the traditional concept of sewage treatment, and there is an urgent need for low-carbon sewage treatment technology aiming at energy conservation, consumption reduction and resource reuse. This review briefly introduces conventional sewage treatment technology and low-carbon sewage treatment technology, and analyzes the research status and development trend of low-carbon sewage treatment technology in detail. The analysis and comparison of conventional and low-carbon sewage treatment technologies is expected to provide a theoretical basis for the practical engineering application of low-carbon sewage treatment technologyto achieve the goal of carbon neutrality. It is of great significance to promote the sustainable development of society and the economy.

Energy Recovery from Municipal Sewage Sludge: An Environmentally Friendly Source for the Production of Biochemicals

“…Different types of sludge are produced in a municipal WWTP, depending on the treatment stage. Primary sludge, which contains 2-9% by weight (%wt) of solids [29,30], is produced during primary treatment (precipitation and sedimentation) to remove heavy solids and fats from raw wastewater [31][32][33]. It has a higher content of total and volatile solids than secondary biological sludge and is theoretically suitable for energy and materials recovery [34].…”

Low-Carbon Water Treatment and Energy Recovery

“…The present technology for water and wastewater treatment offers significant room for improvement. By exploring low-carbon sewage treatment technologies, a theoretical basis for practical engineering applications is expected to be established, contribute toward the goal of carbon neutrality, which is of great significance for promoting sustainable socio-economic development [1]. This rationale underpins the Special Issue focusing on low-carbon water treatment and energy recovery.…”

Research on Novel Heavy Metal Wastewater Treatment Methods

“…[5] Ion exchange and standard electrochemical techniques are among the conventional treatment procedures that have good removal efficiency and the ability to recover heavy metals, but both are expensive and create little sludge. [5][6] A number of researchers have carried out innovations and studies on new heavy metal removal technologies and combined processes, taking into account the influencing factors of the new technologies (e.g. temperature, pH, etc.…”