Air-side ammonia stripping coupled to anaerobic digestion indirectly impacts anaerobic microbiome.

Air-side stripping without a prior solid-liquid phase separation step is a feasible and promising process to control ammonia concentration in thermophilic digesters. During the process, part of the anaerobic biomass is exposed to high temperature, high pH and aerobic conditions. However, there are no studies assessing the effects of those harsh conditions on the microbial communities of thermophilic digesters.

Resource recovery from pig manure via an integrated approach: A technical and economic assessment for full-scale applications.

Intensive livestock farming cannot be uncoupled from the massive production of manure, requiring adequate management to avoid environmental damage. The high carbon, nitrogen and phosphorus content of pig manure enables targeted resource recovery. Here, fifteen integrated scenarios for recovery of water, nutrients and energy are compared in terms of technical feasibility and economic viability.

A combination of ammonia stripping and low temperature thermal pre-treatment improves anaerobic post-digestion of the supernatant from organic fraction of municipal solid waste treatment.

Municipal Solid Waste is mostly composed of organic material which is often treated in anaerobic reactors in waste treatment plants. In most cases, the obtained digestate undergoes a solid/liquid separation step, producing a liquid fraction (known as anaerobic supernatant) rich in ammonium nitrogen that has to be further treated in order to meet discharge standards. The objective of the present work was to evaluate the feasibility of anaerobic post-digestion (37 °C) of a supernatant rich in carbon and nitrogen from a municipal waste treatment plant.

Enhancing thermophilic co-digestion of nitrogen-rich substrates by air side-stream stripping.

High ammonia concentrations can inhibit thermophilic anaerobic digestion, thus limiting the advantageous treatment of wastes rich both in carbon and nitrogen. In the present paper, an air side-stream stripping column was coupled to two thermophilic digesters to control ammonia content. The effects of exposing an increasing biomass fraction to the harsh conditions inside the column (pH above 9, O at saturation and high T) on digester performance were tested by treating and recirculating 21% of reactor volume 3 or 5 times per week.

The ManureEcoMine pilot installation: advanced integration of technologies for the management of organics and nutrients in livestock waste.

Manure represents an exquisite mining opportunity for nutrient recovery (nitrogen and phosphorus), and for their reuse as renewable fertilisers. The ManureEcoMine proposes an integrated approach of technologies, operated in a pilot-scale installation treating swine manure (83.7%) and Ecofrit (16.