TREATMENT EFFECT OF MBF BIO-NEST REACTOR ON HIGH-SALINITY INDUSTRIAL LANDFILL LEACHATE WITH DIFFERENT DILUTION RATIOS

XU Baojian; WANG Mingjie; WANG Shuangchun; WANG Wenhui; ZHANG Yajing; WEI Jing; WANG Xiaochun; LIU Zhigang; LI Shanwei; LIANG Zhishui; XU Wanzhen; WU Zhiren; ZHOU Xiangtong

doi:10.13205/j.hjgc.202306013

Volume 41 Issue 6

Jun. 2023

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2023 > 41(6): 92-100

XU Baojian, WANG Mingjie, WANG Shuangchun, WANG Wenhui, ZHANG Yajing, WEI Jing, WANG Xiaochun, LIU Zhigang, LI Shanwei, LIANG Zhishui, XU Wanzhen, WU Zhiren, ZHOU Xiangtong. TREATMENT EFFECT OF MBF BIO-NEST REACTOR ON HIGH-SALINITY INDUSTRIAL LANDFILL LEACHATE WITH DIFFERENT DILUTION RATIOS[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(6): 92-100. doi: 10.13205/j.hjgc.202306013

Citation:

XU Baojian, WANG Mingjie, WANG Shuangchun, WANG Wenhui, ZHANG Yajing, WEI Jing, WANG Xiaochun, LIU Zhigang, LI Shanwei, LIANG Zhishui, XU Wanzhen, WU Zhiren, ZHOU Xiangtong. TREATMENT EFFECT OF MBF BIO-NEST REACTOR ON HIGH-SALINITY INDUSTRIAL LANDFILL LEACHATE WITH DIFFERENT DILUTION RATIOS[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(6): 92-100. doi: 10.13205/j.hjgc.202306013

Citation:

XU Baojian, WANG Mingjie, WANG Shuangchun, WANG Wenhui, ZHANG Yajing, WEI Jing, WANG Xiaochun, LIU Zhigang, LI Shanwei, LIANG Zhishui, XU Wanzhen, WU Zhiren, ZHOU Xiangtong. TREATMENT EFFECT OF MBF BIO-NEST REACTOR ON HIGH-SALINITY INDUSTRIAL LANDFILL LEACHATE WITH DIFFERENT DILUTION RATIOS[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(6): 92-100. doi: 10.13205/j.hjgc.202306013

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TREATMENT EFFECT OF MBF BIO-NEST REACTOR ON HIGH-SALINITY INDUSTRIAL LANDFILL LEACHATE WITH DIFFERENT DILUTION RATIOS

doi: 10.13205/j.hjgc.202306013

1. College of Environmental and Safety Engineering, Jiangsu University, Zhenjiang 212013, China;
2. Zhucheng Ecological Environment Monitoring Center, Weifang 262299, China;
3. Zhenjiang Xinqu Solid Waste Disposal Co., Ltd., Zhenjiang 212000;
4. College of Civil Engineering, Southeast University, Nanjing 211189, China

Received Date: 2022-09-20
Available Online: 2023-09-02

Abstract

Abstract

Because of the high salinity and complex composition, high-salt landfill leachate has a strong inhibitory effect on microorganisms, which is difficult to treat directly by traditional biotechnologies. This study used modified basalt fiber (MBF) as the carrier media to construct a new biological contact oxidation reactor, and comprehensively evaluated the treatment effect of the formed biological nest on high-salt wastewater. The results showed that the average removal efficiencies of COD, NH₄⁺-N, TN and TP were (26.3±12.4)%, (29.4±8.8)%, (27.6±7.6)% and (16.5±10.4)%, respectively, for raw wastewater. After gradient dilution, the removal efficiency was increased to (43.7±11.6)%, (59.5±21.4)%, (57.1±12.2)% and (26±8.2)% under a dilution ratio of 1:16; and after treatment, the B/C ratio of wastewater increased from 0.08 to 0.36. In addition, the high-salinity wastewater also promoted the microorganisms to secrete more extracellular polymeric substances (EPS), whose content increased from 231.6 mg/g VSS to 417.5 mg/g VSS under the raw water condition and a dilution ratio of 1:16. The analysis of microbial population structure showed that Halomonas, as an aerobic nitrifying hetero-denitrifying bacteria, has a higher relative abundance with a low dilution ratio, and it decreased with the decrease of salinity. Through the annotation of functional genes, it was found that salinity mainly inhibited the growth of ammonia-oxidizing bacteria (AOB), and the expression of amoABC and hao was not detected in R-1, R-2 and R-3 reactors. Furthermore, the expression of denitrification functional enzymes was also repressed compared with the seed sludge. This study showed that MBF bio-nests were resistant to high-salinity stress, which provides a basis for its application in the biological treatment of high-salinity industrial landfill leachate.
- modified basalt fiber,
- biological nest,
- high-salinity industrial landfill leachate,
- gradient dilution,
- nitrogen and carbon removals

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References(36)

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