Waste activated sludge fermentation liquid as carbon source for biological treatment of sulfide and nitrate in microaerobic conditions

Wang, Xiaowei; Zhang, Yu; Zhang, Tingting; Zhou, Jiti; Chen, Mingxiang

doi:10.1016/j.cej.2015.07.062

Cited by 58 publications

(11 citation statements)

References 45 publications

(80 reference statements)

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“…PAC is able to facilitate the removal of hydrophobic substance as well as acidic metabolic products due to its strong adsorption complement for both hydrophobic and acidic substances accumulated during the microbial metabolism [35]. The rate of sulphide and nitrate removal from wastewater increased upon addition of wastewater activated sludge fermentation liquid as carbon source instead of glucose in culture medium of microbial system [36]. According to Zhang et al [37], bacteria that suggested involving in wastewater activated sludge fermentation liquid are Sulfurospirillum sp., Thauera sp., Azoarcus sp., Arcobacter ap.…”

Section: Biological Treatment With Activated Sludgementioning

confidence: 99%

Microbial Aspects in Wastewater Treatment – A Technical Review

Dadrasnia¹,

Maikudi²,

Tzin³

et al. 2017

EPP

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Generation of wastewater is just unavoidable but its discharge into the environment is of great concern. Wastewater mainly comprised of any unwanted waste that could pollute our water system including sewage sludge, wastewater from domestic, industrial, dairy, fish canning and oil and gas industry. Since the early 1990s, microbial treatment processes have gained increasing attention due to its facility and high efficiency compared to conventional techniques. This paper focuses on the essential mechanisms involved in different microbial treatment techniques and special attention on the most recent challenges and developments will be highlighted in this review.

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Section: Biological Treatment With Activated Sludgementioning

confidence: 99%

Microbial Aspects in Wastewater Treatment – A Technical Review

Dadrasnia¹,

Maikudi²,

Tzin³

et al. 2017

EPP

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show abstract

“…However, many researchers have paid more attention to produce volatile fatty acids (VFAs) from WAS because of their long digestion times and complexities of their purifyication for methane production. As a class of high added-value chemical materials, VFAs are promising substrates for many bioprocesses, e.g., biopolymer production 5 , bioenergy generation 6 7 and biological nutrient removal (BNR) 8 . Moreover, their composition has also been demonstrated to be closely related with many bioprocesses.…”

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confidence: 99%

Characterization of biocarbon-source recovery and microbial community shifts from waste activated sludge by conditioning with cornstover: Assessment of cellulosic compositions

Wen

Zhou

Zhang

et al. 2017

Sci Rep

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Most studies on the production of volatile fatty acids (VFAs) from waste activated sludge (WAS) digestion have focused on operating conditions, pretreatments and characteristic adjustments. Conditioning by extra carbon sources (ECS), normally added in a solid form, has been reported to be an efficient approach. However, this has caused considerable waste of monomeric sugars in the hydrolysate. In this study, the effects of two added forms (pretreated straw (S) and hydrolyzed liquid (L)) of cornstover (CS) on WAS acidification were investigated. To obtain different cellulosic compositions of CS, low-thermal or autoclaved assisted alkaline (TA or AA) pretreatments were conducted. The results showed that AA-L test achieved the highest VFAs value (653 mg COD/g VSS), followed by AA-S (613 mg COD/g VSS). These values were 12% and 28% higher, respectively, than that obtained in the TA-L and TA-S tests. Meanwhile, higher percentages of acetic acid were observed after AA pretreatment (~62% versus ~53% in TA). The added forms of CS played an important role in structuring the innate microbial community in the WAS, as shown by high-throughput sequencing and canonical correspondence analysis. The findings obtained in this work may provide a scientific basis for the potential implementation of co-digesting WAS with ECS simultaneously obtaining energy and high value-added products.

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“…However, the available biodegradable chemical oxygen demand (COD) contained in influent, cannot meet the carbon source (CS) demand for both denitrifying bacteria and phosphorous accumulating organisms [1,2]. It is unambiguous that the chemically synthesized CS (e.g., acetate, propionate and glucose) serving as the external CS is neither cost-effective nor sustainable in full scale wastewater treatment plant (WWTP) [3,4]. Recently, some literatures have reported the feasibility of fermentation liquid (enriched in shortchain fatty acids (SCFAs)) from waste activated sludge (WAS) as the external CS for nutrients removal, and satisfactory results were achieved [3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Feasibility of short-term fermentation for short-chain fatty acids production from waste activated sludge at initial pH10: Role and significance of rhamnolipid

Yang

Wang

et al. 2016

Chemical Engineering Journal

100

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Short-term fermentation for SCFAs production from WAS had been proposed. RL pretreatment enhanced WAS hydrolysis/acidification under alkaline conditions. Role and significance of EPSs had been investigated. The cumulative SCFAs were better fitted with pseudo-first-order kinetic model. RL + initial pH 10 caused positive synergies on anaerobic fermentation process. a r t i c l e i n f o b s t r a c tShort-chain fatty acids (SCFAs), preferred carbon source for enhanced biological nutrients removal system, can be produced from anaerobic fermentation of waste activated sludge (WAS). Hydrolysis is known as the rate-limiting step for SCFAs production. This study presents a novel technology using rhamnolipid (RL) pretreatment connected alkaline anaerobic fermentation to enhance SCFAs production. Experiment results showed that the integration treatments performed significant enhancement of SCFAs production, and the fermentation time was remarkably shortened. The maximum SCFAs production, 378 mg COD/g VSS (volatile suspended solid), reached at 72-h fermentation time under 0.2 g RL/g TSS (total suspended solid) and initial pH 10 treatment, which was 4.31, 1.32 and 1.24 times higher than that of control, initial pH 10 and 0.2 g RL/g TSS treatment, respectively. The mechanism study showed that integration treatments could enhance the release of constituents from the cells and/or extracellular polymeric substances to suspension, and hydrolysis rate constant was improved greatly in integration treatment, 8.68, 2.14 and 1.55 times higher than that of control, sole RL and initial pH 10 treatments, respectively. The results suggested that positive synergy led to improvement of WAS solubilization and SCFAs production under integration conditions. The pseudo-first-order model was successfully built to present the SCFAs accumulation. Therefore, the integration method in this work was a promising technology for SCFAs production enhancement from WAS.

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Waste activated sludge fermentation liquid as carbon source for biological treatment of sulfide and nitrate in microaerobic conditions

Cited by 58 publications

References 45 publications

Microbial Aspects in Wastewater Treatment – A Technical Review

Microbial Aspects in Wastewater Treatment – A Technical Review

Characterization of biocarbon-source recovery and microbial community shifts from waste activated sludge by conditioning with cornstover: Assessment of cellulosic compositions

Feasibility of short-term fermentation for short-chain fatty acids production from waste activated sludge at initial pH10: Role and significance of rhamnolipid

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