An eco-friendly strategy for dairy wastewater remediation with high lipid microalgae-bacterial biomass production

Biswas, Tethi; Bhushan, Shashi; Prajapati, Sanjeev Kumar; Chaudhuri, Shaon Ray

doi:10.1016/j.jenvman.2021.112196

Cited by 80 publications

(14 citation statements)

References 46 publications

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“…Park et al found that the negative effects of ammonium nitrogen can be reduced by moderate-degree aeration of the cultivation media, which removes some of the ammonium by stripping to ammonia gas [ 29 ]. An even-better nitrogen removal efficiency from liquid waste has been found using a microalgae–bacteria consortium [ 31 ]. The microalgae–bacteria consortium for dairy wastewater remediation was reported to remove almost 100% of the nitrate and about 80% of the ammonium within 48 h, with initial nitrate concentrations ranging from 5.5 to 139 mg/L, and ammonium concentrations ranging from 16 to 23.6 mg/L.…”

Section: Discussionmentioning

confidence: 99%

Application of Liquid Waste from Biogas Production for Microalgae Chlorella sp. Cultivation

Sendžikienė

Makarevičienė

2022

Cells

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Microalgae biomass is a viable feedstock for a wide range of industries. Recently, there has also been interest in the ability of microalgae biomass applications for biofuel production. In the meantime, the cultivation of microalgae biomass requires high energy costs, and the application of microalgae for technical purposes is still problematic. A significant part of the cost of biomass arises from the nutrients used for cultivation. Chemical compounds included in the microalgae cultivation media can be replaced by suitable wastes containing nitrogen, phosphorus, and other elements. This could reduce the microalgae biomass cultivation price and allow cheaper biomass to be used for biofuel production. The aim of this work was to comprehensively investigate and optimize the growth process of microalgae using liquid waste (liquid waste after biogas production from sewage sludge and distillers’ grain) as a source of nitrogen and phosphorus, and technical glycerol as a carbon source. It was found that higher levels of waste in the cultivation media were found to inhibit the accumulation of microalgal biomass, with the optimum level corresponding to a nitrogen concentration of 0.08 g/L. The influence of technical glycerol from biodiesel production on the yield of microalgal biomass was investigated, and it was found that the addition of 6% glycerol allows an increase in the concentration of microalgal biomass in the cultivation media, from 18.1 to 20.6%.

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Section: Discussionmentioning

confidence: 99%

Application of Liquid Waste from Biogas Production for Microalgae Chlorella sp. Cultivation

Sendžikienė

Makarevičienė

2022

Cells

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“…The study showed an 85-93% and 96-100% removal rate for phosphate and nitrogen in the form of ammonium nitrogen from municipal wastewater (Bahman et al, 2020). In another study, Biswas et al (2021) used a consortium of photoautotrophic microorganisms mainly Microcystis aeruginosa, Synechocystis sp. and Thermosynechococcus elongatus BP-1 to treat wastewater from the dairy industry.…”

Section: Photoautotrophs In Urban Space-new Perspectives 41 Water And...mentioning

confidence: 99%

New trends in biotechnological applications of photosynthetic microorganisms

Dawiec‐Liśniewska

Podstawczyk

Bastrzyk

et al. 2022

Biotechnology Advances

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“…In order to get the water to a nutrient free condition, it could be used for cultivation of yet another welldefined mixed consortium of bacteria and microalgae enriched from wastewater fed fish pond. This consortium with minimal aeration using bubbling and light could completely remove nitrate and phosphate with 93% removal of chemical oxygen demand and 87% removal of ammonia while growing in treated dairy wastewater for 48 h [26]. The consortium shows 67% enhancement in biomass with 42% enhancement of lipid and 55% enhancement of carbohydrate content when compared to biomass grown on wastewater fed aquaculture fish pond water (from where the biomass was originally enriched) as control [26].…”

Section: Rural Dairy Wastewater Managementmentioning

confidence: 99%

“…Appropriately designed consortium using well characterized microbes from activated sludge of dairy effluent treatment plant and other environmental origin can be combined in definite proportion to give a sludge free biofilm based dairy wastewater treatment system which within 20 h of incubation under ambient condition in a single unit operation can reduce the nitrate and phosphate substantially [20]. The treated water after further treatment with bacteria microalgae mixed consortium for 48 h was free of nutrients and suitable for discharge or reuse [26].…”

Section: Urban Dairy Wastewater Treatmentmentioning

confidence: 99%

Green Gold from Dairy Industry: A Self-Sustained Eco-Friendly Effluent Treatment Plant

Chaudhuri¹

2022

New Advances in the Dairy Industry

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The major bottleneck of dairy effluent treatment plant operation is the generation of 10 m3 of nutrient rich wastewater per m3 of milk processed resulting in an annual production of 7.93 tons of carbon dioxide equivalent (CO2 e) gas during treatment in a 7–8 step process. It is an expensive, non-ecofriendly, laborious process which is often not adoptable by the small segment installations. A carefully selected tailor-made bacterial consortium in biofilm reactor within 4 h of incubation in a single step operation under ambient condition could transform the total volume of wastewater into ammonia rich liquid biofertilizer generating 0.79 tons/year CO2 e gas. This biofertilizer replaces the use of fresh water and chemical fertilizer for agriculture, producing economic crops at par with chemical fertilizer. In certain cases, the production of crops is increased substantially over chemical fertilizer based growth. It reduced carbohydrate content of tuber crops. The generated liquid biofertilizer can overcome the shortage in fodder production without using chemical fertilizer and fresh water, hence solving one of the major concerns for sustaining the expansion of dairy industry, hence making dairy effluent treatment plant (ETP) operation an eco-friendly, self-sustainable operation.

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An eco-friendly strategy for dairy wastewater remediation with high lipid microalgae-bacterial biomass production

Cited by 80 publications

References 46 publications

Application of Liquid Waste from Biogas Production for Microalgae Chlorella sp. Cultivation

Application of Liquid Waste from Biogas Production for Microalgae Chlorella sp. Cultivation

New trends in biotechnological applications of photosynthetic microorganisms

Green Gold from Dairy Industry: A Self-Sustained Eco-Friendly Effluent Treatment Plant

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