Journal
BIORESOURCE TECHNOLOGY
Volume 300, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2019.122620
Keywords
Biochar; Agricultural waste; Aerobic granular sludge; Petroleum wastewater; Granulation
Funding
- Science Foundation of China University of Petroleum, Beijing [2462018BJB001]
- National Natural Science Foundation of China [21776307]
- Independent Project Program of State Key Laboratory of Petroleum Pollution Control [PPCIP2017004]
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The effects that rice husk (biochar-rh), rice bran (biochar-rb) and walnut shell (biochar-ws) biochar had on aerobic granulation and reactor performance during the treatment of petroleum wastewater have been investigated. The different biochars reduced aerobic granulation time by 15 days compared with the control and also increased resistance to shock loading. The average COD and TN removal increased by 3.2%-5.1% and 10%-13%, respectively. Bacteria having functional metabolisms associated with the treatment of petroleum wastewaters were enriched in granular sludge that contained biochars. The reactor containing biochar-rb was the most stable and removed the most nutrients. The reactor containing biochar-rh had the largest initial granule size. This study provides insights into how the physicochemical properties of different biochars influence aerobic granular sludge systems.
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