Integrated Biofilm Microbial Remediation Technology for Riverine Water Environment
Due to population growth and economic development,aquatic ecosystems have suffered severe degradation.The influence of rural areas and industrial and mining enterprises on river water bodies is particularly serious.Contaminants like ammonia nitrogen and organic pollutants in water bodies pose threats to both the environment and human health,necessitating environmental management and ecosystem restoration.Therefore,environmental governance and water ecosystem restoration are of urgent need.According to the current state of river water quality,a near-river approach was employed,involving the use of a comprehensive water ecosystem purification technology,including"high-efficient ecological floating island"and"hybrid aerated biofilm remediation."The core of this approach focused on composite biofilm microbial treatment and was complemented by eco-floating islands and aeration biofilms to enhance water quality.The implementation included the construction of weirs and purification ponds along the riverbanks.Within the purification ponds,a novel composite MABR aeration biofilm was employed at the bottom for aeration and reoxygenation,thus increasing dissolved oxygen levels in the river water.In the central portion,biofilms were used to facilitate the microbial degradation of organic pollutants.Finally,the top layer of the water was equipped with eco-floating islands planted with emergent aquatic plants to adsorb metal ions.The results showed that effluent from the purification ponds met class IV surface water quality standards with ammonia nitrogen levels of≤1.1 mg/L and total nitrogen levels of≤1.3 mg/L.The operational cost was 0.12 yuan/m³,significantly lower than the"sediment biogeochemical oxidation"technology,which costs 3～4 times more.This technology are worthy of application and promotion.
NETL
NSTL
万方数据
