title: Possible utilization of acrylic paint and copper phthalocyanine pigment sludge for vermiculture.
abstract: Sludge generated from water treatment plants in two different paint and pigment manufacturing industries, one manufacturing CPC Green (copper phthalocyanine green) and the other acrylic (pure and styrene) washable distempers, synthetic enamels, fillers and putties, were used for culturing earthworms (Eisenia foetida Savigny). The possibility of getting a quality vermicompost was also explored. The sludges were used pure and mixed with month-old cow dung at 1:1, 1:2, 1:3, 2:1 and 3:1 ratios (sludge:cow dung). In pure sludges and in the 3:1 ratio, earthworms did not survive. Earthworms had very low survival in CPC Green sludge and its mixtures while acrylic paint sludge was very efficient in supporting worm growth and worm castings were generated quickly. Both sludges were alkaline, non-saline, but had appreciable Ca, Al, Pb, Zn, and Mn. CPC Green had high Cu (12,900 mg kg(-1)) and acrylic paint sludge had high total Cr (155 mg kg(-1)). High Ca and Al in both came from water treatment chemicals (lime and alum), while CPC Green itself is a copper-based pigment. The sludges were suitable for land application with regard to their metal contents, except for Cu in CPC Green. CPC Green did not support proper growth of plants (green gram, Vigna radiata (L). R. Wilcz.), while acrylic paint sludge supported growth in pure form and mixtures with soil.
authors.affiliation: National Environmental Engineering Research Institute, Nehru Marg, Nagpur-440020, India. d_majumdar@neeri.res.in
authors.forename: Deepanjan
authors.initials: D
authors.lastname: Majumdar
authors.forename: Vaidehi
authors.initials: V
authors.lastname: Buch
authors.forename: Praisy
authors.initials: P
authors.lastname: Macwan
authors.forename: Jignesh
authors.initials: J
authors.lastname: Patel
mesh_terms: D000818:Animals; D001673:Biodegradation, Environmental; D007211:Indoles / Q000378:metabolism*; D008372:Manure; D009835:Oligochaeta / Q000254:growth & development* / Q000378:metabolism; D009942:Organometallic Compounds / Q000378:metabolism*; D010150:Paint; D011108:Polymers / Q000378:metabolism; D012722:Sewage / Q000737:chemistry; D012987:Soil / Q000032:analysis; D012989:Soil Pollutants / Q000737:chemistry / Q000378:metabolism*; D014866:Waste Products
chemical_list: D007211:Indoles; D008372:Manure; D009942:Organometallic Compounds; D011108:Polymers; D012722:Sewage; D012987:Soil; D012989:Soil Pollutants; D014866:Waste Products; C015445:copper phthalocyanine