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The condensates arising from the pyrolytic gas valorization is owing to high concentrations of small molecular phenols, cyanides, nitrogen-heterocyclics, aromatics and ammonium, posing an environmental and health hazard. In this paper, the watery phase of the biomass gasification condensate from spent mushroom compost (SMC), with a chemical oxygen demand (COD) of 16.4 g\/L and total nitrogen of 2.3 g\/L, was pretreated by Fenton oxidation. The experiments were conducted at room temperature with an initial pH value of 3, 5 and 8.9, hydrogen peroxide (H2O2) dosages between 15 and 100% of the normalized stoichiometric ratio (NSR), and Fe2+ dosages corresponding to molar ratio of H2O2:Fe2+ between 10 and 30. Through respiration inhibition assays, the best operational condition for detoxification was determined at an initial pH 5 with 30% NSR H2O2 dosage and molar ratio of H2O2:Fe2+ at 15:1. The specific operational cost of the Fenton oxidation was calculated at 2.17 \u20ac\/kg CODelimination. In respiration inhibition assay, the oxygen consumption of wastewater after Fenton oxidation was increased by 316% in 3 days. In a 20 days\u2019 biogas production test, the biogas production was increased by 81%.<\/jats:p>","DOI":"10.2166\/wst.2022.071","type":"journal-article","created":{"date-parts":[[2022,2,25]],"date-time":"2022-02-25T17:27:24Z","timestamp":1645810044000},"page":"2225-2239","update-policy":"https:\/\/doi.org\/10.2166\/iwapcrossmarkpolicypage","source":"Crossref","is-referenced-by-count":5,"title":["Fenton oxidation as pretreatment for biomass gasification condensate: cost and biomass inhibition evaluation"],"prefix":"10.2166","volume":"85","author":[{"given":"Qiqi","family":"Zhang","sequence":"first","affiliation":[{"name":"Environmental Process Engineering, Technical University of Berlin, Berlin 10623, Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jonas","family":"Pluschke","sequence":"additional","affiliation":[{"name":"Environmental Process Engineering, Technical University of Berlin, Berlin 10623, Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Sven-Uwe","family":"Gei\u00dfen","sequence":"additional","affiliation":[{"name":"Environmental Process Engineering, Technical University of Berlin, Berlin 10623, Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"945","published-online":{"date-parts":[[2022,2,25]]},"reference":[{"key":"key-10.2166\/wst.2022.071-1","doi-asserted-by":"publisher","DOI":"10.1016\/j.scitotenv.2019.133961"},{"key":"key-10.2166\/wst.2022.071-2","unstructured":"Barker C. 2018 Chemical Profile: Europe Caustic Soda. 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