Enhanced simultaneous nitrification and denitrification in treating low carbon-to-nitrogen ratio wastewater: Treatment performance and nitrogen removal pathway.

Advanced nutrient removal from ammonia and domestic wastewaters by a novel process based on simultaneous partial nitrification-anammox and modified denitrifying phosphorus removal

Evolution of real municipal wastewater treatment in photobioreactors and microalgae-bacteria consortia using real-time parameters

A novel SNPR process for advanced nitrogen and phosphorus removal from mainstream wastewater based on anammox, endogenous partial-denitrification and denitrifying dephosphatation.

Post-endogenous denitrification and phosphorus removal in an alternating anaerobic/oxic/anoxic (AOA) system treating low carbon/nitrogen (C/N) domestic wastewater

Advanced nitrogen and phosphorus removal in the pre-denitrification anaerobic/anoxic/aerobic nitrification sequence batch reactor (pre-A2NSBR) treating low carbon/nitrogen (C/N) wastewater

Nutrient removal and microbial community structure variation in the two-sludge system treating low carbon/nitrogen domestic wastewater

The invention discloses a device and a method for a low-C/N ratio municipal wastewater short-cut denitrification/short-cut nitrification anaerobic ammonia oxidation biofilm process, belonging to the field of biological sewage treatment. The method comprises the following steps: allowing municipal wastewater and one part of supernatant subjected to short-cut nitrification anaerobic ammonia oxidation in the previous cycle to simultaneously enter a short-cut denitrification bio-membrane reactor, performing anaerobic stirring, performing short-cut denitrification by fully utilizing a carbon source in raw water, and reducing NO3 into NO2 , so that the influence of organic matters in the raw water on microbes in the subsequent short-cut nitrification anaerobic ammonia oxidation bio-membrane reactor; and pumping the supernatant containing NH4 and NO2 into the short-cut nitrification anaerobic ammonia oxidation bio-membrane reactor through a peristaltic pump for carrying out an anaerobic ammonia oxidation reaction, performing short-cut nitrification and anaerobic ammonia oxidation on the residual NH4 in an intermittent aeration and intermittent stirring manner, and finally draining. According to the method disclosed by the invention, the carbon source does not need to be added, advanced nitrogen removal of the low-C/N ratio municipal wastewater is realized, and the method has the advantages of energy consumption, small treatment amount of residual sludge, and the like.

Device and method for low-C/N ratio municipal wastewater short-cut denitrification/short-cut nitrification anaerobic ammonia oxidation biofilm process

The invention provides a device and a method for improving an A2NSBR two-sludge denitrification denitriding and phosphorus removal process on the basis of a DEAMOX technology, and belongs to the fieldof municipal wastewater biological treatment. The device mainly consists of a raw water tank, an A/A/O-SBR reactor, a first middle water tank, an N-SBR reactor and a second middle water tank. The method comprises the following steps that partial urban domestic sewage firstly enters the A/A/O-SBR reactor; denitrification phosphorus-accumulating bacteria release phosphorus under the anaerobic conditions; meanwhile, an outer carbon source in the sewage is absorbed and is converted into an inner carbon source PHA; after static precipitation, liquid supernatant enters the N-SBR reactor for nitration reaction; after the nitration reaction is completed, still standing precipitation is performed; the liquid supernatant flows back to an anoxic stage of the A/A/O-SBR reactor; denitrification phosphorus removal reaction, short-process denitrification reaction and anaerobic ammoxidation reaction are performed; then, micro aeration is performed to complete the rest phosphorus absorption and nitrogen gas blowing removal; then, still standing water discharge is performed. The double-sludge theory and the denitrification phosphorus removal and DEAMOX technology are used; the problem of too high ammonia and nitrogen content in outlet water of a conventional A2N process is solved; the deep denitriding is realized.

Weihua Zhao

Papers

Post-endogenous denitrification and phosphorus removal in an alternating anaerobic/oxic/anoxic (AOA) system treating low carbon/nitrogen (C/N) domestic wastewater

Advanced nitrogen and phosphorus removal in the pre-denitrification anaerobic/anoxic/aerobic nitrification sequence batch reactor (pre-A2NSBR) treating low carbon/nitrogen (C/N) wastewater

Nutrient removal and microbial community structure variation in the two-sludge system treating low carbon/nitrogen domestic wastewater

Device and method for low-C/N ratio municipal wastewater short-cut denitrification/short-cut nitrification anaerobic ammonia oxidation biofilm process

Device and method for improving A2NSBR two-sludge denitrification denitriding and phosphorus removal process on basis of DEAMOX technology