Nutrients recovery from piggery wastewater and starch wastewater via microalgae-bacteria consortia

Reduction of food rations and shortages is one of the impacts of the increasing human population. Food sector industries then try to cope with the fast growing number of customers. Agribusiness sector gains its popularity in these recent years, including pig farm. The increase trend of animal farming industry is likely to bring increasing pollution problem unless effective treatment methods are used. The main problems related to the pig farm include odor nuisance and pig manure disposal. The existing land application of piggery wastewater is the traditional way to discharge the wastewater. This may yield in land and water contamination, due to the accumulation of unused nutrients by crop plant. A case study of a large commercial pig farm from Australia is proposed to apply in smaller scale in Indonesia. Operational strategies for the small-scale SBR (Sequencing Batch Reactor) treating piggery effluent were developed based on lab-scale experiments. Due to SBR characteristics, which are money-saving and space-saving, it is very suitable to be applied in urban area. An economic evaluation was made of various process options. The cost estimation showed that SBR is a cost effective process, allowing operational batches to be adjusted to reduce unnecessary aeration cost. A reduction in the aeration cost was achieved by shortening the batch time from 24-h to 8-h. A comparison of three different SBR options showed that smaller size reactors could be more flexible and cost effective when compared with the larger ones.

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Experimental study of high rate pond system treating piggery wastewater

Water Science & Technology ◽

10.2166/wst.1996.0271 ◽

1996 ◽

Vol 34 (11) ◽

pp. 125-132 ◽

Cited By ~ 6

Author(s):

Baozhen Wang ◽

Wenyi Dong ◽

Jinlan Zhang ◽

Xiangdong Cao

Keyword(s):

Experimental Study ◽

Energy Consumption ◽

Flow Pattern ◽

Fish Farming ◽

High Rate ◽

Land Area ◽

Piggery Wastewater ◽

Hydraulic Flow ◽

Pond System ◽

Economic Analyses

The results of an experimental study conducted in a full-scale high rate pond system treating piggery wastewater at Jianfengshan Piggery, Panyu City, Guandong Province, are presented. The system consists of two advanced anaerobic ponds (AAP) in parallel, followed by an anaerobic transformation pond (ATP) and a five-cell algae-bacterial pond (ABP). The mechanism of the AAP is described and the hydraulic flow pattern analyzed. Fermentation pits (FP) built on the bottom performed very efficiently, operating like UASB in principle. A new concept of ATP is advanced, based on its ability to transform poorly degradable materials to more easily degradable ones. It was found in the study that the HRP system was more efficient, more reliable and saved 40% land area compared with a conventional pond system. Economic analyses of both the energy consumption and the benefit to the pond system of fish farming are also included in the paper.

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Semi-batch cultivation of Chlorella sorokiniana AK-1 with dual carriers for the effective treatment of full strength piggery wastewater treatment

Bioresource Technology ◽

10.1016/j.biortech.2021.124773 ◽

2021 ◽

Vol 326 ◽

pp. 124773

Author(s):

Chun-Yen Chen ◽

En-Wei Kuo ◽

Dillirani Nagarajan ◽

Cheng-Di Dong ◽

Duu-Jong Lee ◽

...

Keyword(s):

Wastewater Treatment ◽

Effective Treatment ◽

Batch Cultivation ◽

Chlorella Sorokiniana ◽

Piggery Wastewater ◽

Full Strength

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Advances in Circular Bioeconomy Technologies: From Agricultural Wastewater to Value-Added Resources

Environments ◽

10.3390/environments8030020 ◽

2021 ◽

Vol 8 (3) ◽

pp. 20

Author(s):

Nidhi Mehta ◽

Kinjal J Shah ◽

Yu-I Lin ◽

Yongjun Sun ◽

Shu-Yuan Pan

Keyword(s):

Membrane Separation ◽

Value Added ◽

Fulvic Acids ◽

Chemical Precipitation ◽

Environmental Benefits ◽

Nitrogen And Phosphorus ◽

Piggery Wastewater ◽

Agricultural Wastewater ◽

Treatment Processes ◽

Electrokinetic Separation

This review systematically outlines the recent advances in the application of circular bioeconomy technologies for converting agricultural wastewater to value-added resources. The properties and applications of the value-added products from agricultural wastewater are first summarized. Various types of agricultural wastewater, such as piggery wastewater and digestate from anaerobic digestion, are focused on. Next, different types of circular technologies for recovery of humic substances (e.g., humin, humic acids and fulvic acids) and nutrients (e.g., nitrogen and phosphorus) from agricultural wastewater are reviewed and discussed. Advanced technologies, such as chemical precipitation, membrane separation and electrokinetic separation, are evaluated. The environmental benefits of the circular technologies compared to conventional wastewater treatment processes are also addressed. Lastly, the perspectives and prospects of the circular technologies for agricultural wastewater are provided.

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