Bioresource technology. 2020 Sep:311:123467. doi: 10.1016/j.biortech.2020.123467 Q19.72024

Pilot-scale aerobic granular sludge in the treatment of municipal wastewater: Optimizations in the start-up, methodology of sludge discharge, and evaluation of resource recovery

活性污泥法处理城市污水的示范规模试验：启动、污泥排放方法和资源回收评价的优化翻译改进

Silvio Luiz de Sousa Rollemberg¹, Lorayne Queiroz de Oliveira¹, Amanda Nascimento de Barros¹, Paulo Igor Milen Firmino¹, André Bezerra Dos Santos²

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作者单位

¹ Department of Hydraulic and Environmental Engineering, Federal University of Ceará, Fortaleza, Ceará, Brazil.

² Department of Hydraulic and Environmental Engineering, Federal University of Ceará, Fortaleza, Ceará, Brazil. Electronic address: andre23@ufc.br.

DOI: 10.1016/j.biortech.2020.123467 PMID: 32388453

摘要 Ai翻译

This work evaluated the formation, maintenance, performance, and microbiology of a pilot-scale aerobic granular sludge reactor treating low-strength municipal wastewater under tropical climate conditions. Additionally, different resource recovery possibilities (phosphorous, tryptophan, and alginate-like exopolysaccharides) were investigated from the produced sludge. Granulation occurred after 35 days without external carbon source supplementation (COD_inf ≈ 461 mg/L; COD/DBO₅ ≈ 3.2). Some protocols were implemented: (i) fat separation to decrease granule flotation; (ii) high exchange rates (60%) during rainy periods to increase the organic load; (iii) selective sludge discharge methodology. After granules formation, optimizations were done to improve reactor performance (COD, BOD, NH₄⁺, and PO₄^3- removals close to 90%), and energy demand reduced from 0.43 (start-up) to 0.25 kWh/m³ (after optimizations). The produced sludge had a high concentration of phosphorus (0.020 g P/g VSS), tryptophan (0.048 g tryptophan/g VSS), and alginate-like exopolysaccharides (0.219 g ALE/g VSS), indicating a good resource recovery possibility.

Keywords: AGS reactor optimization; Aerobic granular sludge; Resource recovery; SNDPR; Wastewater treatment.

Keywords：aerobic granular sludge; municipal wastewater; resource recovery

关键词：好氧颗粒污泥; 城市污水; 资源回收