
Jianbo GuoTaizhou University
Jianbo Guo
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Publications (171)
Here, polypyrrole (PPY) was first used to the bioreduction of toxic selenite, while the acceleration effect and mechanism were explored. Experiment results suggested that PPY could enhance the selenite bioreduction from 0.42 to 1.04 mg/(L·h). The tests of electrochemical analysis and cytochrome c (cyt-c) content confirmed that PPY promoted the intr...
A novel integrated sulfur fixed-film activated sludge in SBR system (IS0FAS-SBR) was proposed to treat the low C/N ratio municipal wastewater. The effluent total inorganic nitrogen (TIN) and PO43--P decreased from 17 mg/L and 3.5 mg/L to 8.5 mg/L and 0.5 mg/L, and higher nitrogen removal efficiency was contributed by the autotrophic denitrification...
Electroactive biofilms (EABs) play a crucial role in environmental bioremediation due to their excellent extracellular electron transfer (EET) capabilities. However, Cd2+ can have toxic effects on the electrochemical performance of EABs, and the comprehensive inhibition mechanism of EABs in response to Cd2+ shock remains elusive. This study indicat...
The effect of ibuprofen (IBU) on the sulfur autotrophic denitrification (SAD) process and microbial toxic response mechanism were investigated. Nitrate removal performance was inhibited by high IBU concentrations (10 and 50 mg/L), and the effect of low IBU concentrations (1 mg/L) on nitrate removal performance was negligible. The low IBU concentrat...
To remove residual nitrate from anammox process and achieve efficient nitrogen removal, a two-stage system (TAS) with the two individual reactors and a one-stage system (OAS) with the spatial functional areas in one reactor were established via anammox coupling sulfur autotrophic denitrification. The total nitrogen removal efficiency (TNRE) of OAS...
Under high-strength perchlorate concentration ranging from 300 to 1300 mg/L, the dissimilatory perchlorate reducing granular sludge (DPR-GS) was successfully cultivated in an up-flow anaerobic sludge blanket (UASB) reactor to investigate performance and starvation recovery for treating perchlorate wastewater. The mature DPR-GS had excellent perchlo...
The role of Fe(II) on the humic acid (HA) transformation and the effects of humic acid Fe (HA-Fe) on simultaneous partial nitrification, anammox and denitrification (SNAD) system were investigated. After adding Fe(II), the HA content decreased and the HA inhibition on the SNAD system was released. Results showed that Fe(II) and HA formed the lower...
Here, the enhancement effect and mechanism of MoO3 and silicomolybdic acid (SiMo12) on perchlorate bioreduction were investigated. The bioreduction rates of perchlorate at 36 h were enhanced 1.92 and 1.33-fold by SiMo12 and MoO3. According to electrochemical tests, SiMo12 and MoO3 improved the electrochemical activity and reduced the resistance, de...
A coupled system of anammox and sulfur autotrophic (CAS) reactors was established to remove ammonia (NH4⁺-N) and perchlorate (ClO4⁻) simultaneously in wastewater. The anammox performed NH4⁺-N removal and the sulfur autotrophs removed nitrate (NO3⁻-N) produced by anammox and ClO4⁻ in influent. When the concentrations of ClO4⁻, NO3⁻-N and NH4⁺-N in t...
Azo dyes bio-decolorization produces aromatic amines, which are toxic to microorganisms and affect microbial activity. In this paper, the protective effect of β-cyclodextrin (β-CD) on the azo dyes bio-decolorization and the mechanism were investigated. The bio-decolorization rate of direct lake blue in 0.5 mM β-CD supply system was increased by 1.3...
Although silica nanoparticles (SiNPs) are produced in large numbers for industrial manufacturing and engineering applications, the effect of SiNPs on biotransformation in the environment is still not clear. In the current study, the effect of SiNPs in enhancing denitrification was investigated, and its mechanism was explored from the perspectives o...
Anaerobic granular sludge (AnGS) was cultured to treat high-strength perchlorate (reaching to 4800 mg/L) wastewater by an anaerobic baffled reactor (ABR) system with five equal-volume compartments (C1–C5 compartments). Inoculated sludge completely granulated on day 104 with granule size of 0.50–0.75 mm and perchlorate removal efficiency reaching to...
Intrinsically conductive polymers, polyaniline and polyaniline sulfonate (PASAni) were used to explore their effect on denitrification. Denitrification was accelerated 1.90 times by 2 mM PASAni and the possible mechanisms were mainly attributed to the accelerated electron transfer and the enhanced microbial metabolism activity. Intracellular electr...
A laboratory-scale sulfur autotrophic reactor (SAR) was first constructed for treating tellurite [Te(IV)] wastewater. The SAR had excellent Te(IV) bioreduction efficiency (90-96%) at 5-30 mg/L and conformed to the First-order kinetic model. The Te(IV) bioreduction was elaborated deeply from extracellular polymeric substances (EPS) functions, microb...
The aerobic granular sludge simultaneous partial nitrification, denitrification and phosphorus removal (AGS-SPNDPR) process was carried out via tapered aeration in sequencing batch reactor (SBR) for treating low strength and low COD/TN ratio municipal wastewater. The results showed that aerobic granular sludge was successfully cultivated with good...
Understanding how semiconductors interface with bacteria has become increasingly important in environmental remediation. Herein, Shewanella oneidensis MR-1/CdS was constructed, and the interaction between S. oneidensis MR-1 and CdS in decolorization...
The performance and mechanism of denitrification enhanced by three clay minerals, montmorillonite (Mmt), illite and kaolinite, were first studied. Batch experiments indicated that clay minerals significantly enhanced denitrification at certain concentrations (0.1–1 g/L). The denitrification rate with 1 g/L Mmt was increased by 5.0-fold. The mechani...
Here, the toxicity responses mechanism of the simultaneous partial nitritation, anammox and denitrification (SNAD) system to Zn(II) exposure were explored with emphasis on the repressed quorum sensing (QS) regulation on extracellular electron transfer and microbial metabolism. Results showed that Zn(II) accumulated in cells and induced oxidative st...
The contaminant of herbicide clopyralid (CLP) poses a potential threat to the ecological system. However, there is a general lack of research devoted to the perturbation of CLP to the bio-denitrification process, and its biological response mechanism remains unclear. Herein, long-term exposure to CLP was systematically investigated to explore its i...
Simultaneous nitrification, anammox and denitrification (SNAD) system is effective for landfill leachate treatment. However, humic acid (HA) as both an organic pollutant and electron shuttle in landfill leachate, its effects on the SNAD system remain unknown. This study demonstrated that HA initially inhibited NH4⁺-N removal efficiency due to HA in...
The green biogenic PdAu nanoparticles (bio-PdAu NPs) exhibits remarkable catalytic performance in hydrogenation, which is highly desired. However, the catalytic principles and effectiveness of bio-PdxAuy NPs in response to various catalytic systems (electrocatalysis and suspension-catalysis) are unclear. Herein, a facile synthetic strategy for bio-...
Perchlorate (ClO4⁻) industrial wastewater requires efficient removal to prevent adverse environmental impacts, however, high concentration and low biodegradability give rise to poor ClO4⁻ bioreduction performance. S²⁻-autotrophic granular sludge (S²⁻-AuGS) was firstly cultivated for high concentration perchlorate (ClO4⁻) removal in the Upflow Anaero...
In this study, electron transfer capability and mechanisms the porphyrin ring in metalloporphyrins were explored through the performance of tetraphenylporphyrin tetrasulfonic acid (TPPS) in denitrification system. The calculation of frontier orbitals of hemin, chlorophyll c and TPPS indicated the great importance of the porphyrin ring in metallopor...
In order to treat allicin-containing wastewater with antimicrobial characteristic, anaerobic granular sludge (AnGS) under allicin stress was cultivated, which completely granulated on day 143 in the up-flow anaerobic sludge bed (UASB). The mature allicin-tolerant AnGS had a granule size of 0.356-2.000 mm with an excellent settleability, and the che...
In this study, semi-starvation fluctuation driving PD granules cultivation in situ by microorganism exudate metabolites feedbacks was firstly investigated. The PD granules of high nitrite production were cultivated with an excellent mean nitrate-to-nitrite transformation rate (NTR) of 56.39% in just 30 days. The granules size was improved from the...
In a lab-scale anaerobic baffled reactor (ABR) with eight compartments, the heterotrophic and sulfur autotrophic processes were combined to remove perchlorate. And then, the step-feeding distribution ratio of the heterotrophic perchlorate reduction unit (HPR unit) was optimized to achieve efficient removal of high concentration perchlorate. Under t...
To efficiently remove nitrogen and phosphorus from secondary effluent with low values of COD/TN, a novel biological aerated filter (BAF) utilizing calcinated pyrite with a large specific surface area (SSA) and pore diameter (PD) was designed to address this challenge. From the perspective of nutrients removal performance, and the corresponding effl...
In this study, the single-stage partial denitrification-anammox (PD-A) process was started-up in 22 days in a lab-scale up-flow sludge blanket (UASB) reactor to treat wastewater containing NH4⁺-N and NO3⁻-N simultaneously. The TN removal rate reached 97.08% with a low effluent TN of 10 mg/L. High-throughput sequencing results revealed the dominant...
With the discovery of the synergy of photosensitizers and non-photosynthetic bacteria under visible light, a new solar-driven biological wastewater treatment (SDBWT) technology is proposed and reviewed as a promising sustainable wastewater treatment technology. The SDBWT can take advantage of photosensitizers acting as a bridge to capture energy fr...
The effect of various non-quinone redox mediators (NQ-RMs) on the enhancement of perchlorate bioreduction were investigated in this study, with analysis of the structure-activity relationship and mechanism. In the presence of Netural Red (NR), Riboflavin, Meso-tetrakis (4-sulfonatophenyl) porphyrin (TPPS), Meso-Tetraphenylporphyrin (TPP) and 5,10,1...
This study investigates, for the first time, the thermal behaviors, kinetics and thermodynamics of sewage sludge (SS) and low-density polyethylene (LDPE) and their blends during co-pyrolysis. SS and LDPE co-pyrolysis were examined through thermogravimetric analysis (TGA) using different mixtures and multiple heating rates method. A positive interac...
The slow start-up of anammox process has been a big obstacle for its engineering application. In this study, a new strategy was adopted to start up anammox by mixing perchlorate reduction sludge (PRS) and anammox sludge with 50:1 vol ratio, and the mechanism in the start-up process was explored. The results showed that anammox process was started u...
Cyclodextrins (CDs) have been widely used due to the excellent solubilization of hydrophobic organics. However, their effect on the biotransformation process of hydrophilic pollutants is unclear. This study first evaluated the effect and mechanism of CDs on nitrate reduction by S.oneidensis.MR-1. The three CDs (α-CD, β-CD and γ-CD) all accelerated...
The release of highly toxic tellurite into the aquatic environment poses significant environmental risks. The acceleration mechanism and tellurium nanorods (TeNPs) characteristics with bioavailable ferric citrate (Fe(III)) were investigated in the tellurite (Te(IV)) bioreduction. Experiments showed that 5 mM Fe(III) increased the Te(IV) bioreductio...
In this study, the environmental multimedia model (EMM) is extended for assessing the heavy metal in a contaminated site. Using numerical analysis, the EMM is advanced as a numerical EMM system (NEMMS) including three computational modules for the source zone, unsaturated zone, and groundwater zone. The NEMMS incorporates a finite-difference method...
An iron-humic acid (Fe-HA) complex was used as a redox mediator in perchlorate (ClO4-) bioreduction. Bioreduction performance, extracellular polymeric substances (EPS), and microbial community structure were comprehensively explored using different types of anaerobic granular sludge (AnGS) immobilised without the Fe-HA complex (AnGSCON) and with th...
Excessive nitrogen commonly leads to eutrophication and harmful algal blooms, causing a large amount of chlorophyll production. In this study the use of chlorophyll as redox mediator for denitrification was investigated. Results showed that the nitrate and nitrite reduction rates were enhanced 7.26-fold and 7.31-fold with 0.02 mM chlorophyll a (Chl...
Nitrite is normally removed slower than nitrate in sulfur-based autotrophic denitrification (SADN), which may cause nitrite accumulation and decrease the efficiency of nitrogen removal. However, this study showed that nitrite was faster removed by SADN coupled with anaerobic ammonium oxidation (anammox). Both a coupling system and a control system...
The redox-active sulfonated porphyrin meso-tetrakis (4-sulfonatophenyl) porphyrin (TPPS) was novelly proposed to facilitate the mediated electron transfer (MET) of the otherwise time-consuming selenite (Se(IV)) bioreduction. TPPS (0.2 mM) increased the Se(IV) (39.5 ± 1.0 mg∙L⁻¹) bioreduction rate by Shewanella oneidensis·MR-1 by 4- to 5-fold. UV–vi...
Jinxin Dong Z Chen Y Han- [...]
K Wang
This paper presents a two-dimensional numerical multimedia modeling method (2DNEMM) which is developed to evaluate the fate and behavior of pollutant in a contaminated site with complex multimedia conditions. Using alternating direction implicit method, the developed 2DNEMM including source, unsaturated and groundwater modules can estimate spatiall...
The environmental risks of the sulfonamide antibiotics have attracted much attention recently. In this study, the inhibition effects of sulfadiazine (SDZ) on denitrification electron transfer system (ETS) and ameliorative mechanisms of phosphomolybdic acid (PMo12) were first explored. When denitrification was under 2 mg/L SDZ stress, experiments in...
Johannesburg-Sulfur autotrophic denitrification (JHB-SAD) system was investigated for the combined treatment of leachate and municipal wastewater with low strength and low COD/TN ratio. The average removal efficiencies for chemical oxygen demand (COD), total nitrogen (TN) and total phosphorus (TP) were 85.2%, 96.2% and 75.8%, respectively. The muni...
Anaerobic granular sludge (AnGS) has been successfully applied for biological wastewater treatment, but less research has been performed on bioreduction of high-strength perchlorate (ClO4⁻). The tolerance of AnGS to perchlorate loading rate (PLR) was first investigated under different PLR increase strategies (RS, slow-increasing PLR (SI-PLR); RR, r...
A biological aerated filter (BAF) with sulfur and pyrite as fillers were structured to simultaneously remove NH4+-N, NO3--N and PO43--P from secondary effluent. When dissolved oxygen (DO) was 1.2-1.5 mg/L, effluent concentration of NH4+-N, NO3--N and PO43--P were below 0.65, 0.47 and 0.18 mg/L, respectively. Meanwhile, Fe2+ production via decomposi...
In order to achieve efficient nitrogen removal, a separate coupled-system of anaerobic ammonia oxidation (anammox) and sulfur autotrophic denitrification (S0-SADN) was established. In this study, the operational feasibility and stability of the coupled-system under substrate fluctuations were investigated. Results showed that the coupled-system imp...
Polyoxometalates (POMs) used in chemical catalysis field were first explored their effect on the denitrification process. Experiments demonstrated that NO3--N reduction rate with 0.05 mM phosphomolybdic acid (PMo12) was approximately 3.93-fold higher than the PMo12-free system. Simultaneously, PMo12 also had positive effect on NO2--N reduction. Com...
The combined anaerobic baffled reactors (ABRs) of heterotrophic and sulfur-based autotrophic processes were first investigated for the removal of high perchlorate concentration under different feeding strategies. The removal efficiency of the step-feeding ABR (SF-ABR) reached 97.56% at 800 mg/L perchlorate, which was significantly superior to the n...
In this paper, a regional spatial environmental multimedia modeling (RSEMM) approach is developed based on the integration of an environmental multimedia method (EMM) and a numerical water quality model. Emissions, inter-media mass transfer, physical transport and degradation processes are considered in the modeling system. The RSEMM approach is ap...
Physico-chemical and microbial mechanism of sludge during granulation process in upflow sludge bed reactor were investigated in this study. Mature granules achieved high settling velocity of 186– 217 m/h, low VSS/SS of 0.34 and a nitrate loading rate of 2.61 kgNO 3– -N/(m ³ ·d). Scanning electron microscopy photographs showed that granular sludge s...
The heterotrophic-autotrophic reactor including two chambers, that is, the lower part of the heterotrophic zone and the upper part of the autotrophic zone, was used to remove highly concentrated perchlorate (ClO4-) wastewater. The reduction characteristics of ClO4- and the effluent sulfur (SO42-) concentration were investigated using different infl...
To remove high-strength perchlorate, dissimilatory perchlorate reducing granular sludge (DPR-GS) was first cultivated. Three identical UASB reactors were set up under different seed sludge and up-flow velocities (RAS: active sludge (AS) and constant up-flow velocities; RDGS: denitrifying granular sludge (DGS) and constant up-flow velocities; RDGS-f...
K. Li H.-B. Li Y.-F. Li- [...]
Jianbo Guo
A novel heterotrophic combining sulfur-based autotrophic ABR reactor was constructed to treatthe high concentration of perchlorate (ClO 4⁻ ) wastewater. The ClO 4⁻ removal, the sulfate (SO 4²⁻ ) production, the biomass and EPS changes under different ClO 4⁻ concentrationswereexplored. The results showed that the ClO 4⁻ removalefficiency reached to...
It is a novel biological method to reduce high concentration of perchlorate using an upflow anaerobic sludge blanket reactor with perchlorate granular sludge. A high perchlorate loading rate of 9.96 g/(L·d) was achieved in the UASB reactor with the perchlorate reduction rate of 84.7%. The perchlorate granular sludge wet density, mechanical strength...
This study aims to enhance nitrogen removal efficiency of a moving bed biofilm reactor (MBBR) by developing a new MBBR with zeolite powder-based polyurethane sponges as biocarriers (Z-MBBR). Results indicated the total nitrogen (TN) removal efficiency and simultaneous nitrification and denitrification (SND) performance in Z-MBBR were nearly 10% hig...
A novel laboratory-scale aerobic submerged membrane bioreactor integrating sponge-plastic biocarriers (SPSMBR) was conducted to study the removal and degradation mechanisms of sulfonamide antibiotics (SAs). Experimental results indicated that SPSMBR had a better removal of sulfadiazine (91% SDZ) and sulfamethoxazole (88% SMZ) than that of a convent...
This paper investigated a strategy to minimize membrane fouling and increase treatment efficiency through an investigation of a specific approach by adding sponges into a conventional submerged anaerobic membrane bioreactor (CAnSMBR). During the operation, the protein-based soluble microbial products as the main factor affecting the membrane foulin...
Excess sulfate production and low concentration of perchlorate removal are the main problems for sulfur-based perchlorate reduction reactor. In this study, the problems were firstly solved by step-feeding under mixotrophic conditions. The performances of step-feed sulfur-based reactor (SFSBR) and up-flow sulfur-based reactor (UFSBR) are compared. A...
In this research, the nitrate reduction rate increased 2-3 fold in the presence of five different porphyrin compounds (0.25 mM), among which hemin expressed the best accelerating effectiveness. Therefore, hemin was used to explore the catalytic characteristics and mechanisms during denitrification. The relationship between hemin concentrations (Che...
This study investigated the effect of N-acyl-L-homoserine lactones (AHLs) and EPS on anammox activity, and identified the relationship between AHLs and EPS. The effects of AHLs and different EPS fractions (loosely bound (LB) and tightly bound (TB) EPS) from denitrification sludge (DS) and perchlorate reducing sludge (PRS) on anammox activity were c...
The insoluble redox mediators (RMs) were prepared to overcome limitations of soluble RMs that are eluted with water flow in wastewater treatment process. Magnetic nanoparticles possess good performance, due to their high specific surface area, the absence of internal diffusion resistance and easy separation in presence of an external magnetic field...
Three autotrophic packed-bed reactors, each with a different sulfur/quartz sand ratio(R1, 2:1; R2, 1:1; R3, 1:2,)were used to remove high-concentration perchlorate from contaminated water. The perchlorate removal efficiency, kinetics, and biofilm of the reactors were studied using different perchlorate concentrations and hydraulic retention times (...
Most of the pollution occurs in the planetary boundary layer (PBL) of the atmosphere characterized by meteorological factors. This paper aims to estimate these factors through developing a new mining air dispersion model (MADM), considering Pasquill-Turner method (PTM) indices including wind and net radiation index. The PTM method is integrated wit...
Algae is a well-known organism that its characteristic is prominent for biofuel production and wastewater remediation. This critical review aims to present the applicability of algae with in-depth discussion regarding three key aspects: (i) characterization of algae for its applications; (ii) the technical approaches and their strengths and drawbac...
The response surface methodology (RSM), particularly Box-Behnken design model, was used in this study to evaluate the sulfate, alkalinity and free chlorine on iron release of pipe with groundwater supply history and its iron corrosion scale characteristics under water quality changing experiment. The RSM results together with response surface conto...
The presence of antibiotics in water bodies has received increasing attention since they are continuously introduced and detected in the environment and may cause unpredictable environmental hazards and risks. The photocatalytic degradation of sulfamethoxazole (SMX) by ZnO in the presence of fluoride ions (F-ZnO) was evaluated. The effects of opera...
The anaerobic bio-reduction rate of many different contaminants is slow due to the limitations and efficiencies of electron transfer. In this study, the phenazine immobilized in hydrophilic material was tested as a redox mediator (RM) and quasi-homogeneous catalysis to reduce the mass transfer limitation and increase the decolorization efficiency....