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Sludge fermentation liquid addition attained advanced nitrogen removal in low C/N ratio municipal wastewater

Shengjie Qiu, Jinjin Liu, Liang Zhang, Qiong Zhang, Yongzhen Peng

《环境科学与工程前沿（英文）》 2021年 第15卷 第2期 doi: 10.1007/s11783-020-1318-x

摘要： Abstract • Sludge fermentation liquid addition resulted in a high NAR of 97.4%. • Extra NH4+-N from SFL was removed by anammox in anoxic phase. • Nitrogen removal efficiency of 92.51% was achieved in municipal wastewater. • The novel system could efficiently treat low COD/N municipal wastewater. Biological nitrogen removal of wastewater with low COD/N ratio could be enhanced by the addition of wasted sludge fermentation liquid (SFL), but the performance is usually limited by the introducing ammonium. In this study, the process of using SFL was successfully improved by involving anammox process. Real municipal wastewater with a low C/N ratio of 2.8–3.4 was treated in a sequencing batch reactor (SBR). The SBR was operated under anaerobic-aerobic-anoxic (AOA) mode and excess SFL was added into the anoxic phase. Stable short-cut nitrification was achieved after 46d and then anammox sludge was inoculated. In the stable period, effluent total inorganic nitrogen (TIN) was less than 4.3 mg/L with removal efficiency of 92.3%. Further analysis suggests that anammox bacteria, mainly affiliated with Candidatus_Kuenenia, successfully reduced the external ammonia from the SFL and contributed approximately 28%–43% to TIN removal. Overall, this study suggests anammox could be combined with SFL addition, resulting in a stable enhanced nitrogen biological removal.

关键词： Sludge fermentation liquid     Municipal wastewater     Advanced nitrogen removal     Short-cut nitrification     Partial anammox    

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Evaluating the impact of sulfamethoxazole on hydrogen production during dark anaerobic sludge fermentation

《环境科学与工程前沿（英文）》 2023年 第17卷 第1期 doi: 10.1007/s11783-023-1607-2

摘要：

● SMX promotes hydrogen production from dark anaerobic sludge fermentation.

关键词： Sulfamethoxazole     Hydrogen production     Dark anaerobic fermentation     Waste activated sludge    

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New insights into different surfactants’ impacts on sludge fermentation: Focusing on the particular metabolic

《环境科学与工程前沿（英文）》 2022年 第16卷 第8期 doi: 10.1007/s11783-022-1527-6

摘要：

• The promoting effects for VFA generation follow the order of APG>SDBS>HTAB.

关键词： Waste activated sludge (WAS)     Volatile fatty acids (VFA)     Surfactant types     Functional microorganisms     Metabolic activity upregulation    

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Co-fermentation of waste activated sludge with food waste for short-chain fatty acids production: effect

Leiyu FENG, Yuanyuan YAN, Yinguang CHEN

《环境科学与工程前沿（英文）》 2011年 第5卷 第4期   页码 623-632 doi: 10.1007/s11783-011-0334-2

摘要： Effect of pH ranging from 4.0 to 11.0 on co-fermentation of waste activated sludge (WAS) with food waste for short-chain fatty acids (SCFAs) production at ambient temperature was investigated in this study. Experimental results showed that the addition of food waste significantly improved the performance of WAS fermentation system, which resulted in the increases of SCFAs production and substrate reduction. The SCFAs production at pH 6.0, 7.0, 8.0, and 9.0 and fermentation time of 4 d was respectively 5022.7, 6540.5, 8236.6, and 7911.7 mg COD·L , whereas in the blank tests (no pH adjustment, pH 8.0 (blank test 1), no food waste addition, pH 8.0 (blank test 2), and no WAS addition (blank test 3)) it was only 1006.9, 971.1, and 1468.5 mg COD·L , respectively. The composition of SCFAs at pH from 6.0 to 9.0 was also different from other conditions and propionic acid was the most prevalent SCFA, which was followed by acetic and n-butyric acids, while acetic acid was the top product under other conditions. At pH 8.0 a higher volatile suspended solids (VSS) reduction of 16.6% for the mixture of WAS and food waste than the sole WAS indicated a synergistic effect existing in fermentation system with WAS and food waste. The influence of pH on the variations of nutrient content was also studied during anaerobic fermentation of the mixture of WAS and food waste at different pH conditions. The release of increased with fermentation time at all pH values investigated except 4.0, 5.0 and in blank test one. The concentrations of soluble phosphorus at acidic pHs and in the blank test one were higher than those obtained at alkaline pHs. Ammonia and phosphorus need to be removed before the SCFAs-enriched fermentation liquid from WAS and food waste was used as the carbon source.

关键词： waste activated sludge (WAS)     food waste     co-fermentation     short-chain fatty acids (SCFAs)     pH     synergistic effect    

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Acidogenic sludge fermentation to recover soluble organics as the carbon source for denitrification inwastewater treatment: Comparison of sludge types

Lin Lin, Ying-yu Li, Xiao-yan Li

《环境科学与工程前沿（英文）》 2018年 第12卷 第4期 doi: 10.1007/s11783-018-1043-x

摘要：

CEPS sludge was compared with conventional primary and secondary sludge for the VFAs yield.

Fe-based CEPS sludge exhibited the highest efficiency of organic recovery.

Fermented CEPS sludge liquor provided a sufficient carbon source for denitrification.

99% of nitrate removal was achieved based on the Fe-CEPS and sludge fermentation.

关键词： Sewage sludge     Chemically enhanced primary sedimentation (CEPS)     Acidogenic fermentation     Organic carbon recovery     Nitrogen removal    

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High-solid anaerobic digestion of sewage sludge: achievements and perspectives

《环境科学与工程前沿（英文）》 2021年 第15卷 第4期 doi: 10.1007/s11783-020-1364-4

摘要：

• High-solid anaerobic digestion (HS-AD) of sewage sludge (SS) is overviewed.

关键词： High-solid effect     Anaerobic fermentation     Methane production     Biodegradability     Sludge treatment    

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Upgrading VFAs bioproduction from waste activated sludge via co-fermentation with soy sauce residue

Yanqing Duan, Aijuan Zhou, Kaili Wen, Zhihong Liu, Wenzong Liu, Aijie Wang, Xiuping Yue

《环境科学与工程前沿（英文）》 2019年 第13卷 第1期 doi: 10.1007/s11783-019-1086-7

摘要：

SSR addition upgraded VFAs production from WAS.

Structure modification by pretreatments led to performance distinctions.

Distinctions in microbial community was observed by pretreatments selection.

Up to 0.49‒0.65 billion €/year of market value potential was preliminary estimated.

关键词： Waste activated sludge (WAS)     Soy sauce residue (SSR)     Sludge conditioning     Volatile fatty acids (VFAs)     Microbial diversity    

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Aerobic granular sludge formation based on substrate availability: Effects of flow pattern and fermentation

Quan Yuan, Hui Gong, Hao Xi, Kaijun Wang

《环境科学与工程前沿（英文）》 2020年 第14卷 第3期 doi: 10.1007/s11783-020-1226-0

摘要： Penetration depth and substrate characters affect AGS formation and performance. The relationship between substrate gradient and particle size affects AGS stability. The fermentation process is proposed as a pretreatment to improve AGS stability. The influences of flow patterns (mixed-flow and plug-flow) and fermentation pretreatment on aerobic granular sludge (AGS) formation with various substrate availability levels were investigated by running four identical laboratory-scale sequencing batch reactors (R1–R4), comparing two anaerobic feeding strategies and three kinds of substrates. R1 achieved faster granulation with a fast influent fill step followed by a modified anaerobic mixed-flow phase, but the AGS showed poorer stability with a cracked structure and a high suspended solids concentration in the effluent. The anaerobic plug-flow feeding mode (with influent fed slowly from the bottom) in R2 provided deeper penetration depth for the substance to reach the core of AGS and accordingly strengthen AGS stability. An acidogenic up-flow sludge bed reactor was introduced as a pretreatment to improve the AGS performance by enhancing glucose pre-fermentation (R4). AGS fed with mixed volatile fatty acids (VFA) after glucose fermentation showed similar performance compared with the reactor fed with acetate in the aspects of stability, structure, size distribution and nitrogen removal efficiency, and 74% similarity in the microbial community. For actual wastewater with low VFA concentrations, fermentation treatment was suggested as a promising pretreatment for stable AGS granulation and operation.

关键词： Anaerobic plug-flow feeding mode     Anaerobic mixed-flow mode     Fermentation pretreatment     Substrate gradient     Penetration depth    

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Machine learning enabled prediction and process optimization of VFA production from riboflavin-mediated sludgefermentation

《环境科学与工程前沿（英文）》 2023年 第17卷 第11期 doi: 10.1007/s11783-023-1735-8

摘要：

● Data-driven approach was used to simulate VFA production from WAS fermentation.

关键词： Machine learning     Volatile fatty acids     Riboflavin     Waste activated sludge     eXtreme Gradient Boosting    

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Effect of the addition of organic carbon sources on nitrous oxide emission in anaerobic-aerobic (low dissolved oxygen) sequencing batch reactors

Hongjing LI, Xiurong CHEN, Yinguang CHEN

《环境科学与工程前沿（英文）》 2010年 第4卷 第4期   页码 490-499 doi: 10.1007/s11783-010-0248-4

摘要： The effect of additional organic carbon sources on the production of nitrous oxide (N O) in anaerobic-aerobic (low dissolved oxygen) real wastewater treatment system was investigated. In this paper, three laboratory-scale sequencing batch reactors (SBRs) (SBR-1, SBR-2 and SBR-3) were operating under an anaerobic-aerobic (low dissolved oxygen, 0.15–0.45 mg·L ) configuration. The SBRs were ‘long-term cultured’ respectively with a single municipal wastewater sample, sodium acetate, and a waste-activated sludge alkaline fermentation liquid as the additional carbon sources of real wastewater. Off-gas analysis showed that N O was emitted into the atmosphere during the aerobic (low dissolved oxygen) period in the three SBRs, and the order of N O emission rate was SBR-2>SBR-1>SBR-3. It was observed that the higher poly-β-hydroxyvalerate fraction of polyhydroxyalkanoates, the lower glycogen transformation and less nitrite accumulation was in SBR-3, while the opposite behavior was observed in SBR-2. Further research indicated that the interaction of the factors above potentially affected the N O emission in the anaerobic-aerobic (low dissolved oxygen) system.

关键词： anaerobic-aerobic (low dissolved oxygen)     nitrous oxide (N2O) emitting rate     municipal wastewater     waste activated sludge     alkaline fermentation liquid    

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市政污泥热水解—真菌发酵产菌丝纤维回收有机质资源的研究 Article

梁嘉晋, 李炳, 温磊, 李若泓, 李晓岩

《工程（英文）》 2021年 第7卷 第2期   页码 203-211 doi: 10.1016/j.eng.2020.09.002

摘要：

市政污泥的处理已成为许多大城市的环境治理难题。本研究提出了基于热水解—真菌发酵—厌氧消化的三阶段精炼策略，旨在实现市政污泥的减量化和资源化。在市政污泥热水解处理中，当热水解温度由140 ℃升至180 ℃时，可以显著地提升市政污泥的减量效果和有机物的释放效率（p < 0.05）。市政污泥经过140 ℃、160 ℃和180 ℃两级热水解处理后，总挥发性固体（TVS）的去除率分别为36.6%、47.7%和58.5%，总有机碳（TOC）的溶解释放效率分别达到28.0%、38.0%和45.1%。在160 ℃下，污泥热水解上清液中的多糖和蛋白质的含量最为丰富，而在180 ℃时，由于在热水解过程中发生了美拉德反应，污泥热水解上清液的腐殖酸类物质的含量显著增加（p < 0.05）。采用黑曲霉（Aspergillus niger）进行真菌发酵，可以将市政污泥热水解上清液中的有机物转化为高附加值的菌丝纤维。在140 ℃和160 ℃下，污泥热水解上清液经过真菌发酵后，菌丝纤维的生物量分别达到1.30 g·L–1和1.27 g·L–1，对应的有机物转化率为24.6%和24.0%。从污泥热水解上清液真菌中回收的菌丝纤维可以用于生产纸基材料等高附加值产品。菌丝纤维纸结构致密，具有较好的力学性能，抗张强度可以达到10.75 N·m·g–1。在160 ℃下，污泥热水解上清液经真菌发酵耦合厌氧消化两级生物处理，能将热水解上清液超过75%的有机物进行综合利用以回收菌丝纤维和沼气。

关键词： 市政污泥     热水解     真菌发酵     菌丝纤维     厌氧消化     污泥处理    

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Continuous biohydrogen production from diluted molasses in an anaerobic contact reactor

Sheng CHANG, Jianzheng LI, Feng LIU

《环境科学与工程前沿（英文）》 2011年 第5卷 第1期   页码 140-148 doi: 10.1007/s11783-010-0258-2

摘要： An anaerobic contact reactor (ACR) system comprising a continuous flow stirred tank reactor (CSTR) with settler to decouple the hydraulic retention time (HRT) from solids retention time (SRT) was developed for fermentative hydrogen production from diluted molasses by mixed microbial cultures. The ACR was operated at various volumetric loading rates (VLRs) of 20–44 kgCOD·m ·d with constant HRT of 6 h under mesophilic conditions of 35°C. The SRT was maintained at about 46–50 h in the system. At the initial VLR of 20 kgCOD·m ·d , the hydrogen production rate dropped from 22.6 to 1.58 L·d as the hydrogen was consumed by the hydrogentrophic methanogen. After increasing the VLR to 28 kgCOD·m ·d and discharging the sludge for 6 consecutive times, the hydrogentrophic methanogens were eliminated, and the hydrogen content reached 36.4%. As the VLR was increased to 44 kgCOD·m ·d , the hydrogen production rate and hydrogen yield increased to 42.1 L·d and 1.40 mol H ·molglucose-consumed , respectively. The results showed that a stable ethanol-type fermentation that favored hydrogen production in the reactor was thus established with the sludge loading rate (SLR) of 2.0–2.5 kgCOD·kgMLVSS ·d . It was found that the ethanol increased more than other liquid fermentation products, and the ethanol/acetic acid (mol/mol) ratio increased from 1.27 to 2.45 when the VLR increased from 28 to 44 kgCOD·m ·d , whereas the hydrogen composition decreased from 40.4% to 36.4%. The results suggested that the anaerobic contact reactor was a promising bioprocess for fermentative hydrogen production.

关键词： fermentative hydrogen production     anaerobic contact reactor (ACR)     sludge loading rate (SLR)     butyric acid-type fermentation     ethanol-type fermentation    

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Effects of temperature on pyrolysis products of oil sludge

LIU Jianguo, SONG Wei, NIE Yongfeng

《环境科学与工程前沿（英文）》 2008年 第2卷 第1期   页码 8-14 doi: 10.1007/s11783-008-0030-z

摘要： Temperature is the determining factor of pyrolysis, which is one of the alternative technologies for oil sludge treatment. The effects of final operating temperature ranging from 350 to 550°C on pyrolysis products of oil sludge were studied in an externally-heating fixed bed reactor. With an increase of temperature, the mass fraction of solid residues, liquids, and gases in the final product is 67.00%–56.00%, 25.60%–32.35%, and 7.40%–11.65%, and their corresponding heat values are 34.4–13.8 MJ/kg, 44.41–46.6 MJ/kg, and 23.94–48.23 MJ/Nm, respectively. The mass and energy tend to shift from solid to liquid and gas phase (especially to liquid phase) during the process, and the optimum temperature for oil sludge pyrolysis is 500°C. The liquid phase is mainly composed of alkane and alkene (C–C), and the gas phase is dominantly HC and H.

关键词： sludge treatment     corresponding     Temperature     liquid     process    

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Effect of illumination on the hydrogen-production capability of anaerobic activated sludge

Guochen ZHENG, Jianzheng LI, Feng ZHAO, Liguo ZHANG, Li WEI, Qiaoying BAN, Yongsheng ZHAO

《环境科学与工程前沿（英文）》 2012年 第6卷 第1期   页码 125-130 doi: 10.1007/s11783-011-0384-5

摘要： To investigate the influence of illumination on the fermentative hydrogen production system, the hydrogen production efficiencies of two kinds of anaerobic activated sludge (floc and granule) from an anaerobic baffled reactor were detected under visible light, dark and light-dark, respectively. The 10 mL floc sludge or granular sludge was respectively inoculated to 100 mL diluted molasses (chemical oxygen demand of 8000 mg·L ) in a 250 mL serum bottle, and cultured for 24 h at 37°C under different illumination conditions. The results showed that the floc was more sensitive to illumination than the granule. A hydrogen yield of 19.8 mL was obtained in the dark with a specific hydrogen production rate of 3.52 mol·kg MLVSS·d (floc), which was the highest among the three illumination conditions. Under dark condition, the hydrogen yield of floc sludge reached the highest with the specific hydrogen production rate of 3.52 mol·kg MLVSS·d , and under light-dark, light, the specific hydrogen production rate was 3.11 and 2.21 mol·kg MLVSS·d , respectively. The results demonstrated that the illumination may affect the dehydrogenase activity of sludge as well as the activity of hydrogen-producing acetogens and then impact hydrogen production capacity.

关键词： biohydrogen production     dark fermentation     anaerobic activated sludge     light     dehydrogenase    

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Simultaneous saccharification and fermentation of wheat bran flour into ethanol using coculture of amylotic

K. Manikandan, T. Viruthagiri

《化学科学与工程前沿（英文）》 2009年 第3卷 第3期   页码 240-249 doi: 10.1007/s11705-009-0205-6

摘要： Studies on simultaneous saccharification and fermentation (SSF) of wheat bran flour, a grain milling residue as the substrate using coculture method were carried out with strains of starch digesting and nonstarch digesting and sugar fermenting in batch fermentation. Experiments based on central composite design (CCD) were conducted to maximize the glucose yield and to study the effects of substrate concentration, pH, temperature, and enzyme concentration on percentage conversion of wheat bran flour starch to glucose by treatment with fungal α-amylase and the above parameters were optimized using response surface methodology (RSM). The optimum values of substrate concentration, pH, temperature, and enzyme concentration were found to be 200 g/L, 5.5, 65°C and 7.5 IU, respectively, in the starch saccharification step. The effects of pH, temperature and substrate concentration on ethanol concentration, biomass and reducing sugar concentration were also investigated. The optimum temperature and pH were found to be 30°C and 5.5, respectively. The wheat bran flour solution equivalent to 6% ( / ) initial starch concentration gave the highest ethanol concentration of 23.1 g/L after 48 h of fermentation at optimum conditions of pH and temperature. The growth kinetics was modeled using Monod model and Logistic model and product formation kinetics using Leudeking-Piret model. Simultaneous saccharificiation and fermentation of liquefied wheat bran starch to bioethanol was studied using coculture of amylolytic fungus and nonamylolytic sugar fermenting .

关键词： simultaneous saccharification and fermentation (SSF)     starch     coculture fermentation     statistical experimental design     bioethanol     Monod model    

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标题 作者 时间 类型 操作

Sludge fermentation liquid addition attained advanced nitrogen removal in low C/N ratio municipal wastewater

Shengjie Qiu, Jinjin Liu, Liang Zhang, Qiong Zhang, Yongzhen Peng

期刊论文

Evaluating the impact of sulfamethoxazole on hydrogen production during dark anaerobic sludge fermentation

期刊论文

New insights into different surfactants’ impacts on sludge fermentation: Focusing on the particular metabolic

期刊论文

Co-fermentation of waste activated sludge with food waste for short-chain fatty acids production: effect

Leiyu FENG, Yuanyuan YAN, Yinguang CHEN

期刊论文

Acidogenic sludge fermentation to recover soluble organics as the carbon source for denitrification inwastewater treatment: Comparison of sludge types

Lin Lin, Ying-yu Li, Xiao-yan Li

期刊论文

High-solid anaerobic digestion of sewage sludge: achievements and perspectives

期刊论文

Upgrading VFAs bioproduction from waste activated sludge via co-fermentation with soy sauce residue

Yanqing Duan, Aijuan Zhou, Kaili Wen, Zhihong Liu, Wenzong Liu, Aijie Wang, Xiuping Yue

期刊论文

Aerobic granular sludge formation based on substrate availability: Effects of flow pattern and fermentation

Quan Yuan, Hui Gong, Hao Xi, Kaijun Wang

期刊论文

Machine learning enabled prediction and process optimization of VFA production from riboflavin-mediated sludgefermentation

期刊论文

Effect of the addition of organic carbon sources on nitrous oxide emission in anaerobic-aerobic (low dissolved oxygen) sequencing batch reactors

Hongjing LI, Xiurong CHEN, Yinguang CHEN

期刊论文

市政污泥热水解—真菌发酵产菌丝纤维回收有机质资源的研究

梁嘉晋, 李炳, 温磊, 李若泓, 李晓岩

期刊论文

Continuous biohydrogen production from diluted molasses in an anaerobic contact reactor

Sheng CHANG, Jianzheng LI, Feng LIU

期刊论文

Effects of temperature on pyrolysis products of oil sludge

LIU Jianguo, SONG Wei, NIE Yongfeng

期刊论文

Effect of illumination on the hydrogen-production capability of anaerobic activated sludge

Guochen ZHENG, Jianzheng LI, Feng ZHAO, Liguo ZHANG, Li WEI, Qiaoying BAN, Yongsheng ZHAO

期刊论文

Simultaneous saccharification and fermentation of wheat bran flour into ethanol using coculture of amylotic

K. Manikandan, T. Viruthagiri

期刊论文