About 60% of this energy use is used for the ventilation of wastewater in activated sludge treatment 1. This study evaluates the environmental performance of wastewater based algal biofuels with a welltowheel life cycle assessment lca. This is part 1, which will deal with wastewater lagoon algae control. Algae wastewater treatment plant awwtp please click here to go to the business victoria website to view more about this video the application of algae cultivation, to capture and reuse nutrients found in wastewater, can be applied to the treatment of municipal wastewater, dairy effluent, aquaculture, dairy manufacturing waste and other similar highnutrient waste streams. Biomass production a and productivity b of algae biofilm in synthetic wastewater. This thesis marks the end of my studies at the masters programme in environmental and water engineering at uppsala university, which i initiated in 2008. Algae for wastewater treatment workshop proceedings.
Algalbacterial synergy in treatment of winery wastewater. Us8097168b2 wastewater photo biomassalgae treatment. The core of this book is the unit operations and processes associated with biological wastewater treatment. By combining these two processes, algalbased wastewater treatment with algal biofuel production, additional benefits can be derived, among which could be a. Algal cultivation for treating wastewater in african. The oilgae guide to algaebased wastewater treatment was prepared by oilgae. These organisms may become pests when they interfere with the economic, environmental, or recreational uses of a body of water surface water treatment wastewater treatment wetlands. For the large scale algal biomass production, wastewaterborne bacteria are expected to influence the algal biomass accumulation. Abstract biofilmbased algal cultivation has received increased attention as a potential platform for algal production and other applications such as wastewater treatment. Station depuration number of assessments number of assessments revealing compliance compliance rate wastewater treatment facility compliance % wastewater treatment. An integrated microalgaebased system for urban wastewater treatment. Algaebased wastewater treatment for biofuel production. Ron sims utah state university sustainable waste to bioproducts engineering center algae biotechnology for wastewater treatment.
These organisms require energy for respiration and organic carbon food sources in order to. Cultivation of algae on highly concentrated municipal. Coupling of algal biofuel production with wastewater. Algaebased wastewater treatment is broadening its position as an alternative to traditional treatment practices, including. Algal biofilm grown for 3 days pictures of the four strains using pine sawdust as biocarrier during synthetic wastewater treatment. In this article, well discuss bluegreen algae and the problems it can cause, and how wastewater lagoon effluent high in nutrients, especially phosphorus, contributes to habs in waterways.
Algal biofilm cultivation systems represent an alternative to the suspensionbased systems that have yet to become economically viable. The algal based ponding water treatment initiative is aimed at facilitating the effective and efficient removal of nutrients and pathogens in wastewater treatment works. Wastewater use in algae production for generation of. Temperature and organic carbon concentration had a statistically significant effect on algae based biofilm productivity and treatment of dairy wastewater. Oilgae guide to algaebased the oilgae guide to algaebased wastewater treatment is a detailed report on treating municipal and industrial wastewater using algae. Ppcps are considered as emerging environmental contaminants due to their ubiquitous presence in the environment and high environmental risks. Pine sawdust as algal biofilm biocarrier for wastewater treatment and algae based byproducts production. Wastewater reclamation and biofuel production using algae. Microalgae production in wastewater treatment systems. Why are microalgaebased technologies so attractive.
Algae wheel is a very upcoming and innovative technology that integrates the algal biofilms to the existing biological wastewater. Soni, sharmita gupta and sonal spirulina lab, department of botany, faculty of science, d. Sep 15, 2014 recent research has proposed integrating wastewater treatment with algae cultivation as a way of producing algal biofuels at a commercial scale more sustainably. Algae are plants that can be grown using water resources such as brackish, sea, and wastewater unsuitable for cultivating agricultural crops. Pharmaceuticals and personal care products ppcps consist of a variety of compounds extensively used for the treatment of human and animal diseases and for health or cosmetic reasons. Volume 2 basic principles of wastewater treatment is also introductory, but at a higher level of detailing. Oilgae guide to algae based the oilgae guide to algae based wastewater treatment is a detailed report on treating municipal and industrial wastewater using algae. Wastewater treatment courses technical learning college. Us8097168b2 wastewater photo biomassalgae treatment method. Algae seasonal n removal sludge electrical cost maintanance labor capital charge electricity produced 200 150 100 50 0 50 100 150 200 250 a2o nutrient removal sludge algae removal sludge hauling electricity consumption electricity production net emissions algae wastewater treatment is low cost and energy efficient. Many species of microalgae produce significant quantities of lipids which can be converted to biodiesel through process of transesterification. Utilization of waste resources for lowcost algaebased. Microalgaebased wastewater treatment sciencedirect. Table 1 describes key wastewater pollutants and the typical mechanisms used to remove them during conventional and microalgaebased treatment.
Microalgae as a sustainable alternative for wastewater treatment. By combining these two processes, algal based wastewater treatment with algal biofuel production, additional benefits can be derived, among which could be a costsavings. Author links open overlay panel qi zhang a 1 lin wang b 1 zhigang yu c ting zhou a zhiqiang gu a qiaoyun huang a bo xiao d. However, algae typically yield less methane than wastewater sludge. Potential for biofuel production from algae based wastewater. The dominant strains of algae that are commonly found in wastewater ponds, including euglenia, scenedesmus, selenastrum, chlorella, and actinastrum, are suggested as candidates for largescale culturing based on their ability to strip nutrients and organic matter from wastewater, grow rapidly, and produce a significant level of algal oil. Algae biotechnologyfor wastewater treatment ron sims, utah state university microalgaebasedapproaches algaebased tertiary wastewater treatment suspended ron sims utah state university sustainable waste to bioproducts engineering center algae biotechnology for wastewater treatment. Settling and bioflocculation of two species of algae used in. However, despite the promising application possibilities, certain obstacles hamper algae based wastewater treatment from full scale operation and from becoming a costeffective alternative for conventional methods. Wastewater lagoon algae control in the summerwastewater. Review on challenges and limitations for algaebased wastewater treatment. Pdf algae based wastewater treatment model using the rwqm1. Algae utilise byproducts of the wastewater treatment process such as carbon dioxide, nitrate and ammonia. These organisms may become pests when they interfere with the economic, environmental, or recreational uses of a body of water surface water treatmentwastewater treatmentwetlands.
Neither the use of algae to clean wastewater, nor the use of photosynthetic organisms to generate biodiesel, are new concepts on their own. For the treatment of wastewater large amount of materials are to be supplement ed. May 03, 2012 thus, anaerobic digestion is likely to be the nearterm, appropriate use of algae biomass at wastewater treatment plants. Anaerobic digestion of algae biomass to produce energy during. Pdf in this paper, we propose a model describing the dynamics of an algae based wastewater treatment process in an activated sludge. Biofilmbased algal cultivation systems pdf free download. A treatment method for wastewater employing sulfur dioxide and lime chemical dewatering technology in conjunction with an environmental photo biomass algae biological treatment system growing photo biomass algae to reduce dissolved solids, heavy metals, and ammonia in the wastewater to produce recovered treated wastewater for vegetation consumption, biofuel feedstock, and biofuel and carbon. Algal biofilm cultivation systems represent an alternative to the suspension based systems that have yet to become economically viable. Spirogyra can accumulate radiophosphorus by a factor 850.
Our process uses algae to treat municipal wastewater in an efficient way that leaves only clean water, high value fuels and an effective fertilizer as its final products. This technology is suitable for standalone treatment, capacity expansion, or enhanced nutrient removal. I am looking forward to a future full of fertilizer producing, carbon dioxide capturing and sustainable algae based wastewater treatment plants. Industrial wastewater treatment using phycoremediation. Moreover, compared to physical and chemical treatment processes, algae based treatment can potentially achieve nutrient removal in a. Review on challenges and limitations for algaebased. Apr 02, 2015 the findings, which are based on a fivemonth study at a wastewater treatment facility in houston, are available online in the journal algae. Removal of pollutants from waste water using dunaliella algae. For the large scale algal biomass production, wastewater borne bacteria are expected to influence the algal biomass accumulation. Considering all these abilities of algae to purify the polluted waters of many types, it is worth to. Waste water treatment is gaining much importance in recent years with the intension of reusing it. Also, algae based system for the removal of toxic minerals such as lead, cadmium. Temperature and organic carbon concentration had a statistically significant effect on algaebased biofilm productivity and treatment of dairy wastewater.
This study evaluates the environmental performance of wastewaterbased algal biofuels with a welltowheel life cycle assessment lca. Using revised methane yields, the energy return on investment of a typical wrrf increases from 0. The use of microalgae for coupling wastewater treatment with. Recent research has proposed integrating wastewater treatment with algae cultivation as a way of producing algal biofuels at a commercial scale more sustainably. The algae isolated in algae culture broth was pelleted down by centrifugation and inoculated under sterilized condition in the autoclaved wastewater. Removal of pharmaceuticals and personal care products from. The previous study has shown that chlorella vulgaris grew well on centrate wastewater, which is the best among all municipal wastewater streams for both algae yield and wastewater nutrient removal. We at triplepoint thought it would be helpful to write a 3part blog series discussing the three main side effects of summer heat on wastewater lagoons. Wastewater treatment superintendents face a challenging problem in meeting permit limits when ammonia and other nutrients are above effluent limits or cause algae blooms in nutrient rich treatment ponds, resulting in elevated suspended solids and bod levels. Why algae grows on your wastewater lagoon in the summer.
Production pathways examined include different nutrient sources municipal wastewater influent to. The majority is harmless and can be used in biological sewage treatment, but sewage. Biological wastewater treatment principles general overview natural receiving waters including rivers, streams, and tidal areas sustain a background population of microorganisms including bacteria, fungi, and algae. Thus, anaerobic digestion is likely to be the nearterm, appropriate use of algae biomass at wastewater treatment plants. The objectives of this study are to employ potential algae strains for efficient simultaneous biodiesel production and wastewater nutrients removal, and to develop an operational strategy optimal for biomass and biodiesel production as well as nutrient removal from a highly concentrated municipal wastewater stream, centrate, which is generated.
We have discovered new ways to treat wastewater that are both efficient and highly effective. Pine sawdust as algal biofilm biocarrier for wastewater. A treatment method for wastewater employing sulfur dioxide and lime chemical dewatering technology in conjunction with an environmental photo biomassalgae biological treatment system growing photo biomassalgae to reduce dissolved solids, heavy metals, and ammonia in the wastewater to produce recovered treated wastewater for vegetation consumption, biofuel feedstock, and biofuel and carbon. Industrial wastewater treatment using phycoremediation technologies and coproduction of valueadded products.
Microalgae feedstock production can be integrated with wastewater and industrial sources of carbon dioxide. Pdf immobilized algal technology for wastewater treatment purposes. The settling and bioflocculation of two strains of algae were investigated in the laboratory to provide insights to help improve algae settling in large. Potential of algae in bioremediation of wastewater. Heavy metals characteristics of wastewater stabilization ponds. Biofuels were the hot topic in algaculture five years. If the inline pdf is not rendering correctly, you can download the pdf. Algae are generally divided into three major groups, based on the color. Algae systems provides a complete set of wastewater treatment services including innovative and costeffective solutions for primary treatment, nutrient removal, bod removal, and biosolids treatment. Hence, an algae based wastewater treatment plant may potentially. Algaebased biofilm productivity utilizing dairy wastewater. A microalgaebased biofilm reactor was successfully used to treat turbid dairy wastewater. Pdf algae based waste water treatment researchgate.
Use of algae in wastewater treatment many algae can take up and accumulate many radioactive minerals in their cells even from greater concentrations in the water. Treatment of wastewater with microalgae based system have the. Principles of design and operations of wastewater treatment. Algae are plants that can be grown using water resources such as brackish, sea, and wastewater. Top algal wastewater treatment companies ventureradar. Algae seasonal n removal sludge electrical cost maintanance labor capital charge electricity produced 200 150 100 50 0 50 100 150 200 250 a2o nutrient removal sludge algae removal sludge hauling electricity consumption electricity production net emissions algae wastewater treatment is. Nutrient rich wastewater instead of discharging into environment is supplemented for the.
The flue gas generated from biogas combustion provides a cheap and easily accessible source of co 2 for wastewater treatment systems with algae. Dec 15, 2016 a microalgae based biofilm reactor was successfully used to treat turbid dairy wastewater. The oilgae guide to algae based wastewater treatment was prepared by oilgae. Currently, wastewater treatment in the us consumes about 2% of energy. Although, wastewater treatment and co2 removal by microalgae have been. Well also look at cyanobacteria in the lagoon, and what it indicates about treatment. Review on challenges and limitations for algae based wastewater treatment. Microalgae culture offers an interesting step for wastewater treatments, because they. Curren advanced wastewater treatment plant hfc awtp in tampa, florida and secondary effluent. In wastewater treatment plants using conventional activated sludge. The phases and the included protocols are detailed in the next chapters.
The findings, which are based on a fivemonth study at a wastewater treatment facility in houston, are available online in the journal algae. Compiled by a diverse team of experts, with experience in scientific and industrial fields, the comprehensive report for wastewater treatment using algae is the first report that provides indepth analysis and insights on this important field. In the latter, microalgae photosynthesis takes place parallel to normal biological reactions occurring during conventional aerobic biological treatment, thereby boosting nutrient assimilation while providing oxygen to aerobic heterotrophs. This course will cover some of the commonly found aquatic pests including algae, macrophytes rooted and nonrooted plants, invertebrates, and vertebrates.
Ammonia toxicity and recalcitrant cell walls are commonly cited causes of the lower yields. The case for coupling biological wastewater treatment to the production of algal biodiesel is a compelling one that is explored in this research using a combination of mathematical modelling and laboratory experiments. The production of biofuels from algae can be coupled with flue gas co 2 mitigation, wastewater treatment, and production of highvalue chemicals 21, 22. Life cycle environmental impacts of wastewaterbased algal. Abstract biofilm based algal cultivation has received increased attention as a potential platform for algal production and other applications such as wastewater treatment. During the last 50 years biological wastewater treatment systems with microalgae have gained importance and now it is widely accepted that microalgal based wastewater treatment systems are as. Conventional wastewater treatment is based on sequential aerobicanaerobic processes. Nutrient rich wastewater instead of discharging into environment is supplemented for the growth of algae in the wastewater treatment.738 1369 1220 1591 360 1442 1552 167 190 596 1359 1089 19 122 61 1578 1029 1019 126 1106 505 505 1543 116 1274 336 1635 750 1030 1460 1620 518 904 433 1514 1278 1306 1061 916 217 1112 106 1435 741 1353 969 1148 886 104