A substantial volume of primary-treated wastewater from a medical rubber glove factory caused public freshwater to become sewage. The ultrashort hydraulic retention time in constructed wetlands was urgently employed for remediation. Pilot-scale, aeration, and nonaeration horizontal surface flow (HSFCWs) with emergent plants were designed, compared, optimized. Activated carbon, coconut shells, o...

Silt (nutrition medium) is the habitat of many microorganisms that adapt well to water and soil. By extended aeration, it partially comes out sewage. The nature organic impurities determines composition such a substrate, so its leading indicators may vary. Such nutrient medium one favorable conditions for growth development Chironomus larvae various microflora. article presents results studies ...

Using models of organic matter degradation and dissolved oxygen consumption, the concentrations these compounds are analyzed in two stretches a river after discharge raw sewage. The has low drafts widths, so velocity is high aeration coefficient kr calculated with Covar method high, this indicates rapid recovery from water consumed by processes, been instrumented to measure flows at various poi...

In Taiwan, constructed wetlands have received tremendous interests for water quality enhancement due to insufficient sewage treatment and groundwater deterioration. The main objectives of this study were to investigate pollutants removal mechanisms and efficiency within the field-scale natural purification hybrid systems. The systems included an oxidation pond, two serial surface flow wetlands ...

A broad attention has been paid to the field ditches as the sewage interception channel for the agricultural nonpoint source pollution, however, rare studies have involved in the phosphorus migration and transformation between the ditch sediments and overlaying water, especially, from the ditch sediments to the water. The present paper aims to explore with XPS binding energy data how pH, dissol...

A laboratory-scale membrane bioreactor (MBR) was fed with synthetic wastewater to investigate the possibility of simultaneous removal of organic, nitrogen and phosphorus by intermittent aeration. The MBR consists of two compartments using a microfiltration membrane with 0.2 μm pore size and a surface area of 0.35 m2. Hydraulic retention time was set at 24 hours and solid retention time 25 days....

Current weather indifferent fields of science and engineering research purposes and different applications are studied. One of the applications of climate studies, the study of the flow over the weir dam and lower exhaust tunnel is aimed at preventing the risk of cavitations. Aeration is known as one of the most economical and practical way to deal with cavitations on rapid spill ways. In the s...