Advanced sludge reduction and phosphorous removal process

Abstract

An advanced sludge reduction process, i.e. sludge reduction and phosphorous removal process, was developed. The results show that excellent sludge reduction and biological phosphorous removal can be achieved perfectly in this system. When chemical oxygen demand /)(COD) is 332 -420 mg/L, concentration of ammonia p(NH3-N) is 30 -40 mg/L and concentration of total phosphorous p(TP) is 6.0 -9.0 mg/L in influent, the system still ensures p(COD)~23 mg/L, p(NH:N)~3.2 mg/L and p(TP)~0.72 mg/L in effluent. Besides, when the concentration of dissolved oxygen p(DO) is around 1.0 mg/L, sludge production is less than 0. 140 g with the consumption of 1 g COD, and the phosphorous removal exceeds 91%. Also, 48.4% of total nitrogen is removed by simultaneous nitrification and denitrification.

The Basic Process of Lighting as Key Factor in the Transition towards More Sustainable Urban Environments

“…From a technical point of view, some contributions have been related to the internet of things and telecommunications [45], specifically oriented to SDGs [46], or have been civil engineering focused [47], centered around power savings [48], or specifically oriented towards better maintenance protocols [49]. Transversal approaches have been studied in the past [50], although they are outdated and specifically addressed the tourism economy.…”