The development of anaerobic ammonia oxidation (anammox) process

makes it possible to achieve domestic wastewater treatment with low energy consumptions.And the recovery of energy and resources from domestic wastewater can be realized through biological adsorption.The enhanced biological phosphorus removal (EBPR) system was successfully started under sludge retention time (SRT) of 2 d.The SVI of activity sludge was only 50 and the effluent of EBPR system was stable under fluctuant influent.While

the carbon content in EBPR system sludge was only 37%.Stable operation of organic matter removal SBR was achieved by decreasing the aerobic hydraulic residence time (HRT) to 40 min.The carbon content of sludge was then increased to 48%.93.8% of the removed COD was achieved during the anaerobic phase which meant the organic matter was mainly removed by the biological adsorption.Due to the consumption of organic matter by heterotrophic bacteria and the adsorption of phosphorus by PAO occurred simultaneously

when the C/P of domestic wastewater was relatively low

it was difficult to recover both organic matter and phosphorus at the same time.To enhance the recovery of organic matter

HRT of aerobic phase should be decreased and the chemical removal method should be applied to remove part of the phosphorus.The anaerobic mixing time

aeration time and sludge age should be optimized in order to achieve a higher efficient recovery of C and P.