Assessing biomass retention-driven enhancement of bioenergy and nutrient recovery potential in anaerobic membrane bioreactors for sustainable sewage sludge management.

Sustainable management of sewage sludge (SewS) requires efficient strategies for energy recovery and nutrient reutilization. An anaerobic membrane bioreactor (AnMBR) and a continuous stirred tank reactor (CSTR) were operated to evaluate the advantages of membrane-integrated systems in SewS management. The AnMBR achieved a methane yield of 313.

Fouling dynamics varied by filtration cycles in high-solid anaerobic membrane bioreactors for sewage sludge treatment.

Anaerobic membrane bioreactors (AnMBRs) are highly effective in treating sewage sludge (SewS) by promoting the rate-limiting hydrolysis process through biosolids concentration. The treatment of SewS in this study by the high-solid AnMBR achieved an exceptional COD removal efficiency of 99.1 % and a substantial bioenergy yield of 157.

Robust aeration coefficient control based on pH feedback towards stable NO-N/NH-N ratio in large pilot-scale partial nitritation reactor treating food waste digestate.

Two-stage partial nitritation/anammox (PNA) system is a promising technology for treating food waste digestate (FWD). Maintaining a stable NO-N/NH-N ratio in partial nitritation (PN) is essential for the successful implementation of two-stage PNA. Although the aeration coefficient (AC) is a key regulatory parameter, its stability is challenged by fluctuations in chemical oxygen demand (COD).

Stoichiometric analysis and control strategy of partial nitrification for treating dewatering liquid from food-waste methane fermentation.

Methane fermentation is critical for food-waste management; however, effective treatment of its high-ammonium dewatering liquid remains a major challenge. Anammox, a promising candidate for liquid treatment, requires effective pretreatment, such as partial nitrification (PN), to reduce ammonium and generate sufficient nitrite to optimize efficiency. In this study, an airlift reactor was employed to process the dewatering liquid from food-waste methane fermentation.

Increasing the organic loading rate of household food waste anaerobic digestion by landfill leachate addition: Performance and mechanism.

A high amount of easily degradable organics and the absence of trace metals (TMs) in household food waste (HFW) lowered the stability and efficiency of anaerobic digestion (AD) of HFW. Leachate addition to the AD of HFW can provide ammonia nitrogen and TMs to address the accumulation of volatile fatty acids and the lack of TMs. To study the effect of leachate addition on increasing organic loading rate (OLR), both mono-digestion of HFW and AD of HFW with leachate addition were evaluated using two continuously stirred tank reactors.

A review of iron use and recycling in municipal wastewater treatment plants and a novel applicable integrated process.

Chemical methods are expected to play an increasingly important role in carbon-neutral municipal wastewater treatment plants. This paper briefly summarises the enhancement effects of using iron salts in wastewater and sludge treatment processes. The costs and environmental concerns associated with the widespread use of iron salts have also been highlighted.

Rapid proliferation of anaerobic ammonium oxidizing bacteria using anammox-hydroxyapatite technology in a pilot-scale expanded granular sludge bed reactor.

The practical application of anaerobic ammonium oxidation (anammox) technology was seriously limited by lack of anammox seeding sludge. In this work, a pilot-scale expanded granular sludge bed (EGSB) reactor was used for rapid proliferation of anaerobic ammonium oxidizing bacteria (AnAOB) using anammox-hydroxyapatite (anammox-HAP) technology. The excellent settleability of anammox-HAP granular sludge (with an excellent settling velocity of 395 m/h) supported the up-flow velocity of 9.