Plant waste (PW) and excess sludge (ES) are two main organic matters of municipal solid waste. However, there few reports on their anaerobic co-digestion. In this work, the mixed proportion PW ES co-digestion was first optimized at mesophilic temperature, then enhanced with strong oxidant calcium peroxide (CP). The results showed that optimal mixing ratio 1/1 (in terms volatile solids), C/N dig...

AIMS To investigate whether wastewater workers are at increased risk of developing cancer. METHODS Two cohorts of workers employed by the City of Copenhagen, 591 wastewater workers and 1545 water supply workers (controls), were followed from 1965 until 1998. These two cohorts were compared in terms of cause specific mortality and cancer incidence. RESULTS The wastewater workers' mortality e...

Sludge retention time (SRT) is an important factor affecting not only the performance of the nutrient removal and sludge characteristics, but also the production of secondary pollutants such as nitrous oxide (N2O) in biological nutrient removal (BNR) processes. Four laboratory-scale sequencing batch reactors (SBRs), namely, SBR5, SBR10, SBR20 and SBR40 with the SRT of 5 d, 10 d, 20 d and 40 d, ...