The　treatment　of　epichlorohydrin　(ECH)　wastewater　exists　chances　for　achieving　cleaner　production.　This　study　initially　employed　moderately　halophilic　aerobic　granular　sludge　(HAGS)　to　treat　ECH　wastewater,　and　the　resulting　HAGS　was　utilized　to　recover　polyhydroxyalkanoate　(PHA).　During　the　acclimation　process　of　HAGS,　the　chemical　oxygen　demand　removal　efficiency　stabilized　at　70　%.　Moreover,　due　to　the　high　enrichment　of　Halomonas　sp.　(relative　abundance　of　86　±　0.50　%),　the　maximum　PHA　content　of　wasted　HAGS　was　52.67　wt%　in　the　fermentation　process.　Simultaneously,　the　utilization　of　nuclear　magnetic　resonance　spectroscopy　(1H　and　13C　spectra)　and　fourier　transform　infrared　spectroscopy　for　the　structural　analysis　of　polymers　revealed　that　polyhydroxybutyrate　was　the　predominant　substance　extracted　from　HAGS.　In　this　study,　the　innovative　use　of　highly　enriched　HAGS　for　treating　ECH　wastewater　and　simultaneously　recovering　PHA　not　only　enables　the　efficient　biological　treatment　of　ECH　wastewater　but　also　realizes　resource　recovery　of　ECH　wastewater.　©　2023　Elsevier　Ltd