Characterizing the growing microorganisms at species level in 46 anaerobic digesters at Danish wastewater treatment plants: A six-year survey on microbial community structure and key drivers
نویسندگان
چکیده
Anaerobic digestion (AD) is a key technology at many wastewater treatment plants (WWTPs) for converting primary and surplus activated sludge to methane-rich biogas. However, the limited number of surveys lack comprehensive datasets have hindered deeper understanding characteristics associations between variables microbial community composition. Here, we present six-year survey 46 anaerobic digesters, located 22 WWTPs in Denmark, which first largest known study ecology AD regional scale. For three types (mesophilic, mesophilic with thermal hydrolysis pretreatment, thermophilic), typical value range 12 parameters including operational performance parameters. High-resolution bacterial archaeal analyses were carried out species level using amplicon sequencing >1,000 samples new ecosystem-specific MiDAS 3 reference database. We detected 42 phyla, 1,600 genera, 3,584 community, where 70% genera 93% represented environmental taxa that only classified based on de novo placeholder taxonomy. More than 40% found not grow thermophilic digesters due immigration feed sludge. Ammonium concentration was main driver shaping while temperature pH drivers archaea ADs. Sub-setting growing microbes improved significantly correlation revealed presence specific species. Within composition other (organic loading rate, biogas yield, ammonium concentration) correlated This provides insight into structure level, providing foundation future studies ecological significance/characteristics function novel or poorly described taxa.
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ژورنال
عنوان ژورنال: Water Research
سال: 2021
ISSN: ['0043-1354', '1879-2448']
DOI: https://doi.org/10.1016/j.watres.2021.116871