NDLI: Enhanced deodorization and sludge reduction in situ by a humus soil cooperated anaerobic/anoxic/oxic (A2O) wastewater treatment system

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Enhanced deodorization and sludge reduction in situ by a humus soil cooperated anaerobic/anoxic/oxic (A2O) wastewater treatment system

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Feng, Xin Pang, Bo Yan, Xing Li, Biqing Lei, Fang
Description	Country affiliation: China Author Affiliation: Yan X ( Guangzhou Sewage Purification Co., LTD., Guangzhou, 510163, Guangdong, China. yanxing2016@163.com.); Li B ( Guangzhou Sewage Purification Co., LTD., Guangzhou, 510163, Guangdong, China.); Lei F ( Guangzhou Sewage Purification Co., LTD., Guangzhou, 510163, Guangdong, China.); Feng X ( Guangzhou Sewage Purification Co., LTD., Guangzhou, 510163, Guangdong, China.); Pang B ( Guangzhou Sewage Purification Co., LTD., Guangzhou, 510163, Guangdong, China.)
Abstract	Simultaneous sludge reduction and malodor abatement in humus soil cooperated an anaerobic/anoxic/oxic (A2O) wastewater treatment were investigated in this study. The HSR-A2O was composed of a humus soil reactor (HSR) and a conventional A2O (designated as C-A2O).The results showed that adding HSR did not deteriorate the chemical oxygen demand (COD) removal, while total phosphorus (TP) removal efficiency in HSR-A2O was improved by 18 % in comparison with that in the C-A2O. Both processes had good performance on total nitrogen (TN) removal, and there was no significant difference between them (76.8 and 77.1 %, respectively). However, $NH_{4}^{+}–N$ and $NO_{3}^{−}–N$ were reduced to 0.3 and 6.7 mg/L in HSR-A2O compared to 1.5 and 4.5 mg/L. Moreover, adding HSR induced the sludge reduction, and the sludge production rate was lower than that in the C-A2O. The observed sludge yield was estimated to be 0.32 kg MLSS/day in HSR-A2O, which represent a 33.5 % reduction compared to a C-A2O process. Activated sludge underwent humification and produced more humic acid in HSR-A2O, which is beneficial to sludge reduction. Odor abatement was achieved in HSR-A2O, ammonium $(NH_{3}),$ and sulfuretted hydrogen $(H_{2}S)$ emission decreased from 1.34 and 1.33 to $0.06 mg/m^{3},$ $0.025 mg/m^{3}$ in anaerobic area, with the corresponding reduction efficiency of 95.5 and 98.1 %. Microbial community analysis revealed that the relevant microorganism enrichment explained the reduction effect of humus soil on $NH_{3}$ and $H_{2}S$ emission. The whole study demonstrated that humus soil enhanced odor abatement and sludge reduction in situ.
ISSN	09441344
Issue Number	16
Journal	Environmental Science and Pollution Research
Volume Number	23
e-ISSN	16147499
Language	English
Publisher	Springer
Publisher Date	2016-08-01
Publisher Place	Germany
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Discipline Environmental Science Discipline Environmental Chemistry
Content Type	Text
Resource Type	Article
Subject	Environmental Chemistry Health, Toxicology and Mutagenesis Pollution Medicine

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