In the process we measured some of the factors like pH, temperature, electrical conductivity, concentration of iron and TOC and we found out that there is still heavy metal that is Iron ( Fe) in the treated water. The existing treatmnet procedures require a lot of expenditure to upgrade and modify. I was reading that some of the microbes could do this job very easily. Can anyone guide me if we want to treat waste water containing iron, can microbes be used for this purpose?
What are the different microbes to be used? I hear that F. thioxidans will remove Fe from waste water. Has anyone used this? Your experience much appreciated and will guide us.
Sir, microbes are the good option for removal of heavy metal from the waste water. Bacteria, fungi and algae can be used for this purpose. Up to 100% removal were observed in some cases with microbes. You can optimize the various parameters such as nutrient conditions, pH, temperature etc to further increase the removal uptake. Number of literature are available on Fe removal by microbes. Thank You
Thanks Dear Deepak,
i hope all going well with you.
Can you send some literature if you are having related this issue.
it would be helpful foe me.
Regards
Anand
Sir, what is the nature of the waste water in terms of fluid content, and other materials as well as what is the source of the waste water. The reason for the question is if the waste water contains sufficient other materials that can sustain a biological reaction, the iron and other heavy metals would be become bound in the microbial protein and could be harvested.
The use of microbes for bio-remediation is cost effective technique. In your case, you should use Fe resistant or mobilizing bacteria, because only the bacterial strain which demonstrate Fe accumulation in vivo will be more effective in removing Fe from wastewater
Dear Dr
you can find your answer through Biosorption technology for iron removal.
best wishes
Dear osman mam,
Do you have litrature for this technology please send me.
Thanking you
I hope this paper can help you. I'll send more papers about your topic soon.
best wishes
dear anand,
If water is having DO, then all you need is BIRM filtration, it will precipitate Fe as insoluble ferric oxide you need to back wash only for continuous operation with good Fe removal efficiency.
thanks & regards
dinkar
I had some experience of water treatment involving microalgae, aquatic weeds and dry biomass of seaweeds. Cost effective and rapid methods.
microalgae and then filtration of particulate can be a cost effective method in my opinion also
I am not sure microorganism are the best answer but here are links to two papers:
Yang et al., 2014 - http://www.sciencedirect.com/science/article/pii/S0960852414000923
Tekerlekopoulou et al., 2013 http://onlinelibrary.wiley.com/doi/10.1002/jctb.4031/full
Yoram
Dear Gupta, Microalgae and bacteria can offer some help in this . See the following publication on a microalga:
Alavandi, S.V.,P.Kaladharan &V.K.Pillai, 1990. Volatilization of inorganic mercury by Isochrysis galbana Parke from aquatic systems. Indian Journal of Fisheries, 37(2): 163-165. Best wishes
Dear Anand Dev Gupta
Bacteria known to feed on iron include Thiobacillus ferrooxidans and Leptospirillum ferrooxidans. Also Pseudomonas and coliform can oxide fe++ to fe+++ . you should use a settling and filtration unit after oxidizing fe++.
Also you can free download and use the paper titled "The iron-oxidizing proteobacteria" form this link:
http://mic.microbiologyresearch.org/content/journal/micro/10.1099/mic.0.045344-0?crawler=true&mimetype=application/pdf
best regard
From the little bit of experiments we have done, it looks like at their normal operating state, microbes are only good in metabolizing metals that they are already familiar with (i.e. copper and zinc). Removal via biosorption (physicochemical) is dependent on the functional groups of the EPS and biofilm.
Hi Anand, I had done same sort of work. I used Pseudomonas species to reduce toxicity of textile effluent caused due to heavy metals. In a general case, textile effluent is flooded with not just one but several dyes and heavy metals. We used Atomic Absorption Spectroscopy (AAS) to detect heavy metal concentration before and after microbial treatment. Eventually we found that different heavy metals concentrations were reduced to different extents.
Mr. Saxena,
Please see the image from our paper, "Application of response surface methodology for the optimization of textile effluent biodecolorization and its toxicity perspectives using plant toxicity, plasmid nicking assays".
Thanks,
Amit
I will advise you to use macrophytes such as Pistia stratiotes, Eicchornia crassipes or Lemna minor when you want large scale remediation within a certain period.
Because bacteria act relatively slowly, and maintenance of the culture is cumbersome.
You can read the attached work fyi.
The issue of using microbes in removal of heavy metals in waste water is interesting and very new to me. I work with waste waters and drinking waters but I have always concentrated on removal of indicator bacteria as well as phycicochemical parameters but its actually good to think about the aspect of heavy metals. With regards to removal of iron, there are bacteria that can metabolize iron compounds to get their energy requirements and could be used for such applications. The iron bacteria for example Gallionella
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