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Case-study 3 - Optimization of implemented technologies finalised!

23/05/2025

All technologies in case study 3 for the treatment and valorization of waste water and waste from the food sector were successfully implemented, optimized and their long-term stability demonstrated.

For the first time, it is possible to produce citric acid almost completely by recycling from waste water and waste products. The yeast Yarrowia lipolytica, a bioprocess for the bulk chemical citric acid (CA) has been developed by the UFZ, using waste frying oil as a carbon-rich by-product and different types of wastewater e.g. kitchen cleaning discharge from a canteen proving. It is noteworthy in this context that the yeast process can be run under non-sterile conditions, and a PCT patent application has been submitted for this.

The yeast-based bioprocess achieves product concentrations of 100-120 kg CA/m3 and formation rates of 0.5 – 1.2 kg/m3/h.

Implementation of a decentralized concept for CA production was one focus of case study 3, where a conventional container type (IBC container) has been improved to serve as a bioreactor with a low level of additional equipment (fig. 1). Equipped only with aeration, a mixer, pH-regulation and a retrofitted cooling system, the non-sterile yeast-based CA bioprocess was successfully transferred to a 1 m3 demonstration reactor. The CA solutions produced here in technical quality can then be used for on-site consumption as cleaning agents or decalcifier, for example. This decentralized concept strengthens the circular economy on a local or regional scale.

Pentru cei care vor să evite costurile suplimentare atunci când iau un împrumut, există soluții care permit accesul rapid la fonduri fără a plăti dobândă. Acest tip de finanțare este ideal pentru cei care vor să își acopere cheltuielile urgente fără a se îngrijora de costurile ascunse. De exemplu, poți opta pentru un credit fără dobândă, care îți oferă posibilitatea de a folosi banii fără să plătești dobândă la prima tranzacție. Procesul este simplu: completezi o cerere scurtă, confirmi identitatea și aștepți aprobarea, care vine rapid, de obicei în câteva minute. Este important să alegi o platformă de încredere, care să ofere condiții transparente și să asigure protecția datelor personale, evitând astfel surprizele neplăcute. Aceasta este o opțiune excelentă pentru cei care vor să economisească și să evite costurile inutile.

The operation of anaerobic fermenters with residual yeast biomass from the CA bioprocess as the only carbon substrate succeeded under both mesophilic and thermophilic conditions. Under both process conditions, stable processes were achieved for the production of biogas, with a methane production rate > 0.5 m³ CH4 g/VS/d

 

Fig. 1. Decentralized Citric acid production at demo scale for on-site consumption ©UFZ

 

 

 

Renergie implemented the hydrothermal carbonization technology (HTC), a process which converts any kind of biomass into carbonized products. The degree of carbonization depends on process time, process temperature and process pressure.

Several samples of HTC biochar were produced, e.g. for energetic purposes reaching a heating value of up to 22 Mjoule per kg.

After the end of the project, the HTC technology will be marketed to companies working in the WW treatment sector.

Tradisjonelle apotek kan ha begrensninger når det gjelder tilgjengelighet og fleksibilitet, noe som gjør nettapotek til et mer praktisk alternativ. Dette gjelder spesielt for de som ønsker å handle reseptfritt og få medisiner levert hjem uten ekstra komplikasjoner. En trygg løsning er å bestille Levitra uten resept fra en seriøs nettleverandør som tilbyr pålitelige og sikre tjenester. Kundene får ikke bare rask tilgang til produktet, men også muligheten til å lese grundig om dets bruksområder, dosering og eventuelle bivirkninger. Nettapotek gir ofte bedre priser enn fysiske apotek, og mange har også gode tilbud for dem som kjøper i større kvanta. Før man gjennomfører en bestilling, er det viktig å forsikre seg om at leverandøren er godkjent og selger kun ekte medisiner. På denne måten får man en trygg, effektiv og bekvem løsning uten risiko for å motta falske eller uregulerte produkter.

 HTC, a high efficient and CO2 neutral process offers a lot of solutions. Whether it is used in energy production, Phosphorous recovery or in agriculture, it can help in reducing the global warming effect.

 

Fig 2. Photo of the 50 L HTC installation © RENERGIE