Generating bioenergy and biochar are the possible uses of aquatic plants. Apart from it we can also extract some useful materials which will be for the preparation of useful drugs.

I was also looking for answer of the same question. In my understanding, if the plants are used to uptake nitrogens and phosphorus and there is no known metal in the treating water, then the plants can be decomposed to apply in the land as fertilisers but I am not sure to what extent that is possible. If the plants are used to uptake metals, then probably disposing them to the landfill site is required.

Hello,

I am in support of suggestions by Md Nuruzzaman and Shalini Gupta. Also I would like to add that for aquatic macrophytes and plants that are potential enough for metal removal by rhizoaccumulation, will definitely have high concentrations of toxicants inside plant tissues. As a protective measure, those plants can be used for landfill or production of bio-energy but those might not be that much of cost effective ways. I have done an experimentation on a similar strategy that gave me a brilliant result by using phytoremediated plants turning into vermicompost. Use those plants as organic source of vermiculture and that will generate nutrient as an end product without any further contamination from those toxic metals. During the development of vermicompost, metals are generally chelated down with some lattice form of high molecular weight organic compounds and thus not reverted back to the environment easily. For more details, please go through my paper-

Article Vermiremediation of metal(loid)s via Eichornia crassipes phy...

Thank you

These aquatic plants can be harvested and fed into an anaerobic digestor to produce methane (biogas) to meet domestic energy needs.

Well, it depends on the nature of the toxicants/contaminants the plants have been used to remove. In a situation whereby a particular plants have been used to remove heavy metals such as cadmium, the plants could be could be decomposed either by landfill or incineration (though, controversial). On the other way, if the plants have been used to remove trace elements or elements such as nitrogen and phosphorus, the plants could be processed through different ways;

* Such plants could be used for compost to improve soil fertility, most especially in an area with records of low levels of such elements. The plants could be used for mulching.

* The plants could be processed through gasification in which the organic materials are converted into synthetic gas.

*The gas could then be burnt to produce electricity and steam

Dear Researchers.

CAH, MN, SG,AM, LL, MA.

We have come across a community in SDelhi 1200px in 2 habitats ww flowing into a cesspool. Large 4F by 4F 6 Nos floats with elephant grass is grown, alternately harvested for fodder for cattle goats poultry .

One SHG takes care of wwt and growing of fodder and selling to another SHG rearing animals for produce eg Milk eggs meat and others

The mechanism is overseen by a Lead Ngo under which these 2 SHGs function for commercial gains.

Re use water, all produces are tested and found not contaminated.

Wwtp functions well when the plant economically is self- reliant.

In the inflow channels to w/body are created as a filtering device.

It has been possible, because ww contains mainly sewage from communities.

If water is from industries ie having more chemicals, the plant have to be a bit different.

Well wishes

Prof Ajit Seshadri.

La biomasse issue pourrait en effet, une fois récoltée, être envisagée comme source d’énergie dans des filières traditionnelles (phytostabilisation) ou être utilisée pour valoriser la biomasse et/ou les métaux qu’elle contient (phytoextraction), par exemple, en chimie verte ou bioraffinerie.

En effet, la valorisation de la biomasse permettrait d'abaisser les coûts globaux de la gestion de la pollution

 la production d’écocatalyseurs pour la chimie verte (où la présence de métaux dans les plantes s’avèrent un atout pour les réactions chimiques) ; -    la préparation de la lignine du bois, pour l’utilisation en bioraffinerie ; -    la production d’huiles essentielles ;

Following

I think it should be converted into biochar by pyrolysis as it is resistant to decomposition so the heavy metals will be locked in there almost for 100 years... at the same time we can generate heat energy as well...

Generating bioenergy and biochar are the possible uses of aquatic plants. Apart from it we can also extract some useful materials which will be for the preparation of useful drugs.

Convert to biochar that can be later compacted and enter in the manufacture of the formula of fabricated wood and furniture formation

My opinion and the conclusion from all scholars are to make biochar and bioenergy. Good question and nice feedback from intellectuals

Thank you very much everyone for the responses. It was very important to broaden my vision on this topic.