Cyanide treatment of mining tailings using suspended biomass and moving bed biomass reactors

Alvillo-Rivera, Angélica Julieta; Garrido-Hoyos, Sofía Esperanza; Buitrón, Germán

doi:10.1007/s11356-021-18166-y

Cited by 4 publications

(5 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Kaldnes K1 micro presented 88.0% COD removal rate on day 7, which was the highest removal rate compared to the rest of the carriers, due to its narrow inner compartments. In comparison, a previous study obtained only 69% reduction in total cyanide‐containing mining tailings after 141 days of operation in an MBBR 28 …”

Section: Resultscontrasting

confidence: 60%

“…In comparison, a previous study obtained only 69% reduction in total cyanide-containing mining tailings after 141 days of operation in an MBBR. 28 If the process is continued for more than 7 days, the small carrier will certainly produce an unstable performance and lower COD removal rates, which can be termed the 'carrier efficiency limit'. This limit refers to the carrier's ability to entrap suspended biomass and to immobilize free microorganisms, where the better ability, the higher the COD removal rates.…”

Section: Synthetic Biofilm Carriersmentioning

confidence: 99%

See 1 more Smart Citation

Experimental investigation of biofilm carriers of varying shapes, sizes, and materials for wastewater treatment in fixed bed biofilm reactor: a qualitative study of biocarrier performance

Al‐Amshawee

Yunus

Alalwan

et al. 2022

J of Chemical Tech & Biotech

View full text Add to dashboard Cite

BACKGROUND Biofilm carriers were introduced in the early 1990s mainly to abate chemical oxygen demand (COD). However, studies have continued investigating few biocarriers repeatedly, without studying a large number of carriers in a single study under similar conditions. RESULTS The current study investigated the performance of nine synthetic and eight natural biofilm carriers for 7 days of palm oil mill effluent (POME) treatment in terms of COD removal. A fixed bed biofilm reactor (FBBR) was 100% packed with biocarriers and operated at 35 °C. Performance based on the 7th day COD removal could be ranked in the following order: green ammonia absorption stone (91%), K1 micro (88%), coral sand (87.8%), volcanic stone (86.6%), Micro Media (85.5%), 1.6 cm BioBall (85%), pebble (82.4%), porous ceramic ring (82.3), K1 (82.1%), non‐porous ceramic ring (80.9%), brown ammonia absorption stone (78.6%), biological filter (77.7%), Ultra Media (76.8%), blue media (69.3%), 3.0 cm BioBall (68.8%), 2.5 cm BioBall (66.5%), and loofah sponge (63%). CONCLUSION The smallest carrier, K1 micro, yielded the highest COD removal (88%) on day 7 among the other synthetic carriers, while green ammonia absorption stones provided the highest quality effluent from day 1 (3565 mg COD L−1) to day 7 (780 mg COD L−1) and delivered the shortest start‐up compared with all natural and synthetic carriers. The discussion revealed that all carrier functionalities (i.e., scale, shape, surface pores, roughness, material, surface area, porosity, and durability) play a key role in deciding carrier quality. The current study also introduced ‘carrier efficiency limit’, which refers to the carrier's capacity to entrap biomass and immobilize microorganisms. © 2022 Society of Chemical Industry (SCI).

show abstract

Section: Resultscontrasting

confidence: 60%

Section: Synthetic Biofilm Carriersmentioning

confidence: 99%

Experimental investigation of biofilm carriers of varying shapes, sizes, and materials for wastewater treatment in fixed bed biofilm reactor: a qualitative study of biocarrier performance

Al‐Amshawee

Yunus

Alalwan

et al. 2022

J of Chemical Tech & Biotech

View full text Add to dashboard Cite

show abstract

“…However, the adsorption technique is expensive, and sometimes it is not sustainable due to the use of chemical substances. Another approach is biological treatment [51]. This method is more environmentally friendly than other methods and less costly, but it is mostly used for cyanide-contaminated wastewater and not for drinking water treatment.…”

Section: Experimental and Mathematical Modellingmentioning

confidence: 99%

A Sustainable Decision Support System for Drinking Water Systems: Resiliency Improvement against Cyanide Contamination

et al. 2022

View full text Add to dashboard Cite

Maintaining drinking water quality is considered important in building sustainable cities and societies. On the other hand, water insecurity is an obstacle to achieving sustainable development goals based on the issues of threatening human health and well-being and global peace. One of the dangers threatening water sources is cyanide contamination due to industrial wastewater leakage or sabotage. The present study investigates and provides potential strategies to remove cyanide contamination by chlorination. In this regard, the main novelty is to propose a sustainable decision support system for the dirking water system in a case study in Iran. First, three scenarios have been defined with low ([CN−] = 2.5 mg L−1), medium ([CN−] = 5 mg L−1), and high ([CN−] = 7.5 mg L−1) levels of contamination. Then, the optimal chlorine dosage has been suggested as 2.9 mg L−1, 4.7 mg L−1, and 6.1 mg L−1, respectively, for these three scenarios. In the next step, the residual cyanide was modelled with mathematical approaches, which revealed that the Gaussian distribution has the best performance accordingly. The main methodology was developing a hybrid approach based on the Gaussian model and the genetic algorithm. The outcomes of statistical evaluations illustrated that both injected chlorine and initial cyanide load have the greatest effects on residual cyanide ions. Finally, the proposed hybrid algorithm is characterized by the multilayer perceptron algorithm, which can forecast residual cyanide anion with a regression coefficient greater than 0.99 as a soft sensor. The output can demonstrate a strong positive relationship between residual cyanide- (RCN−) and injected chlorine. The main finding is that the proposed sustainable decision support system with our hybrid algorithm improves the resiliency levels of the considered drinking water system against cyanide treatments.

show abstract

“…As for chemical oxidation, this involves removing mainly free cyanide and its weak bonds [12]. The decision about which is best will depend on factors such as the cost of the treatment, the available space to be used, the initial concentrations of the contaminant and the amount of waste to be treated, among others [13].…”

Section: Introductionmentioning

confidence: 99%

Optimization of Factors for the Biological Treatment of Free and Complexed Cyanide

2023

View full text Add to dashboard Cite

Mexico is characterized as a mining country since it is the world’s main silver producer. During its extraction, wastewater (mining tailings) is generated which contains cyanide and heavy metals. The purpose of this research was to determine whether a bacterial consortium isolated from a tailings dam can use cyanide as a source of nitrogen and carbon to carry out its biodegradation. The study determined the effects of three physicochemical factors (pH, temperature and inoculum concentration) and three metals (copper, iron and nickel) on cyanide biodegradation. The results showed that the highest cyanide removals were obtained when working with a pH of 9.5, a temperature of 25 °C and 15% v/v of inoculum (88%), while the optimum values for copper, iron and nickel were 0, 7.7 and 0.46 mg·L−1, respectively, showing that copper causes an inhibitory effect (cyanide biodegradation of 68%) on the bacteria and consequently on the biological degradation of cyanide and that iron can promote the biodegradation of the pollutant by 91%.

show abstract

Cyanide treatment of mining tailings using suspended biomass and moving bed biomass reactors

Cited by 4 publications

References 43 publications

Experimental investigation of biofilm carriers of varying shapes, sizes, and materials for wastewater treatment in fixed bed biofilm reactor: a qualitative study of biocarrier performance

Experimental investigation of biofilm carriers of varying shapes, sizes, and materials for wastewater treatment in fixed bed biofilm reactor: a qualitative study of biocarrier performance

A Sustainable Decision Support System for Drinking Water Systems: Resiliency Improvement against Cyanide Contamination

Optimization of Factors for the Biological Treatment of Free and Complexed Cyanide

Contact Info

Product

Resources

About