Effect of Moisture Content on Bond Flows of Black Soldier Fly Larvae Biotransformation Pig Manure Organic Fertilizer

doi:10.13304/j.nykjdb.2022.0389

Abstract

Abstract:

The moisture content of black soldier fly biotransformation pig manure organic fertilizer can reach 40%~60% under natural condition， but the flow parameters are difficult to obtain by conventional means. In order to explore the effect of moisture content on the bonding flow of organic fertilizer， the effects of different water content （41.21% ~ 60.52%） on the flow and bonding ability of organic fertilizer particles were quantitatively analyzed by the method of accumulation angle measurement and discrete element simulation. The results showed that the organic fertilizer-steel collided restitution coefficient，organic fertilizer-steel static friction coefficient and organic fertilizer Johnson-Kendall-Roberts（JKR）surface energy significantly affected the accumulation angle of organic fertilizer. With the rising of moisture content from 41.21% to 60.52%， the organic fertilizer-steel static friction coefficient firstly decreased and then increased，especially， which reached the maximum value 0.39 when the moisture content was 56.56%， the surface energy changed from 0.22 to 0.47 J·m^-2. The direct shear test of organic fertilizer showed that when the moisture content was greater than 40%， the internal friction angle between the organic fertilizer particles gradually decreased， the cohesion between particles increases with the increase of JKR surface energy， organic fertilizer particles were easy to agglomerate， which would restrict the flow movement of organic fertilizer to some extent， and the repose angle increased. The study was expected to provide numerical parameter reference for the black soldier fly biotransformation pig manure organic fertilizer application and development of mechanization.

Key words: black soldier fly, organic fertilizer, moisture content, bond flow, discrete element

摘要：

黑水虻生物转化猪粪后获得的有机肥含水率介于40%~60%之间，其黏结流动参数难以通过常规手段获取。为探究含水率对有机肥黏结流动的影响，通过堆积角测定与离散元仿真相结合的方法，从数值上量化分析不同含水率（41.21%~60.52%）对有机肥颗粒流动与黏结能力的影响。结果表明，有机肥-不锈钢碰撞恢复系数、有机肥-不锈钢静摩擦系数、有机肥JKR（Johnson-Kendall-Roberts）表面能显著影响有机肥堆积角；有机肥含水率在41.21%~60.52%范围内，随着含水率的增加，有机肥-不锈钢静摩擦系数先增大后减小，在含水率56.56%时达到最大值，为0.39，而JKR表面能由0.22 J·m^-2逐渐升高到0.47 J·m^-2；有机肥直剪试验表明，当含水率大于40%时，有机肥颗粒间的内摩擦角逐渐减小，但颗粒间的内聚力随JKR表面能增大而增大，有机肥颗粒间易发生团聚现象，一定程度上阻碍颗粒流动，堆积角增大。研究结果可为转移、输送有机肥的机械设备研究提供基础数据支撑。

关键词: 黑水虻, 有机肥, 含水率, 黏结流动, 离散元

CLC Number:

S216

Ting ZHOU, Songlin SUN, Haiying ZHU, Caiwang PENG. Effect of Moisture Content on Bond Flows of Black Soldier Fly Larvae Biotransformation Pig Manure Organic Fertilizer[J]. Journal of Agricultural Science and Technology, 2023, 25(10): 126-136.

周婷, 孙松林, 朱海英, 彭才望. 含水率对黑水虻生物转化猪粪有机肥黏结流动的影响[J]. 中国农业科技导报, 2023, 25(10): 126-136.

Figures/Tables 12

Fig. 1 Repose angle of organic fertilizerNote：1—Universal testing machine； 2—Steel cylinder；3—Fertilizer heap；4—Video camera；5—Computer.

Fig.2 Discrete element simulation model

Table 1 Parameters required for discrete element simulation

参数符号 Parameter notation	参数 Parameter	参数水平 Parameter level
参数符号 Parameter notation	参数 Parameter	-1	0	1
T₁	泊松比Poisson ratio	0.10	0.30	0.50
T₂	剪切模量Shear modulus/MPa	1.00	5.50	10.00
T₃	密度Particle density/（kg·m^-3）	1 600	2 000	2 400
T₄	有机肥-有机肥碰撞恢复系数 Organic fertilizer-organic fertilizer collided restitution coefficient	0.40	0.60	0.80
T₅	有机肥-有机肥静摩擦系数 Organic fertilizer-organic fertilizer static friction coefficient	0.10	0.55	1.00
T₆	有机肥-有机肥滚动摩擦系数 Organic fertilizer-organic fertilizer rolling friction coefficient	0.05	0.25	0.45
T₇	有机肥-不锈钢碰撞恢复系数 Organic fertilizer-steel collided restitution coefficient	0.15	0.40	0.65
T₈	有机肥-不锈钢静摩擦系数 Organic fertilizer-steel static friction coefficient	0.10	0.50	0.90
T₉	有机肥-不锈钢滚动摩擦系数 Organic fertilizer-steelr rolling friction coefficient	0.10	0.40	0.70
T₁₀	JKR表面能JKR surface energy/（J·m^-2）	0.05	0.40	0.75

Table 2 Pile angle result of Plackett-Burman design

序号 No.	参数水平 Parameter level										堆积角 Repose angle/（°）
序号 No.	T₁	T₂	T₃	T₄	T₅	T₆	T₇	T₈	T₉	T₁₀	堆积角 Repose angle/（°）
1	1	-1	-1	-1	-1	1	-1	1	-1	-1	25.77
2	1	1	-1	-1	-1	-1	1	-1	1	-1	14.07
3	1	1	1	-1	-1	-1	-1	1	-1	1	54.29
4	1	1	1	1	-1	-1	-1	-1	1	-1	11.30
5	1	1	1	1	1	-1	-1	-1	-1	1	21.69
6	-1	1	1	1	1	1	-1	-1	-1	-1	22.29
7	1	-1	1	1	1	1	1	-1	-1	-1	14.06
8	-1	1	-1	1	1	1	1	1	-1	-1	52.31
9	1	-1	1	-1	1	1	1	1	1	-1	35.82
10	1	1	-1	1	-1	1	1	1	1	1	67.48
11	-1	1	1	-1	1	-1	1	1	1	1	50.51
12	-1	-1	1	1	-1	1	-1	1	1	1	50.94
13	1	-1	-1	1	1	-1	1	-1	1	1	74.62
14	1	1	-1	-1	1	1	-1	1	-1	1	50.06
15	-1	1	1	-1	-1	1	1	-1	1	-1	23.89
16	-1	-1	1	1	-1	-1	1	1	-1	1	57.07
17	1	-1	-1	1	1	-1	-1	1	1	-1	27.64
18	-1	1	-1	-1	1	1	-1	-1	1	1	59.01
19	1	-1	1	-1	-1	1	1	-1	-1	1	56.59
20	-1	1	-1	1	-1	-1	1	1	-1	-1	31.52
21	-1	-1	1	-1	1	-1	-1	1	1	-1	31.98
22	-1	-1	-1	1	-1	1	-1	-1	1	1	32.03
23	-1	-1	-1	-1	1	-1	1	-1	-1	1	51.46
24	-1	-1	-1	-1	-1	-1	-1	-1	-1	-1	11.94
25	0	0	0	0	0	0	0	0	0	0	41.89

Table 3 Analysis of variance of Plackett-Burman design

来源 Resources	自由度 Df	效应 Effect	离均差平方和 Adi SS	均方 Adi MS	F值 F value	P值 P value
模型Model	11		6 406.13	582.38	4.46	0.006^**
线性Liner	10		6 396.24	639.62	4.89	0.005^**
T₁	1	-1.80	19.37	19.37	0.15	0.707
T₂	1	-0.96	5.51	5.51	0.04	0.841
T₃	1	-5.62	189.73	189.73	1.45	0.250
T₄	1	-0.20	0.25	0.25	0.00	0.966
T₅	1	4.55	124.03	124.03	0.95	0.348
T₆	1	4.35	113.36	113.36	0.87	0.369
T₇	1	10.87	709.16	709.16	5.43	0.037^*
T₈	1	11.87	845.38	845.38	6.47	0.025^*
T₉	1	2.52	38.10	38.10	0.29	0.598
T₁₀	1	26.93	4 351.35	4 351.35	33.29	0.000^**
弯曲Bend	1		9.89	9.89	0.08	0.788
误差Error	13		1 699.32	130.72
合计Sum	24		8 105.45

Table 4 Results of steep climbing test

序号 No.	有机肥-不锈钢碰撞恢复系数 Organic fertilizer-steel collided restitution coefficient	有机肥-不锈钢静摩擦系数Organic fertilizer-steel static friction coefficient		JKR表面能 JKR surface energy/ （J·m^-2）	仿真结果 Simulation result/（°）	含水率41.21%有机肥堆积角Repose angle of 41.21% moisture organic fertilizer		含水率60.52%有机肥堆积角Repose angle of 60.52% moisture organic fertilizer
序号 No.				JKR表面能 JKR surface energy/ （J·m^-2）	仿真结果 Simulation result/（°）	试验值 Test value/（°）	相对误差 Relative error /%	试验值 Test value/（°）	相对误差 Relative error /%
1	0.15	0.10	0.05		12.81	37.25	65.61	45.53	71.86
2	0.25	0.25	0.20		26.22		29.61		42.41
3	0.35	0.40	0.35		44.36		16.03		2.57
4	0.45	0.55	0.50		67.23		44.59		32.28
5	0.55	0.70	0.65		71.44		47.86		36.27

Table 5 Scheme and results of Box-Behnken design

序号 NO.	T₇：有机肥-不锈钢碰撞恢复系数Organic fertilizer-steel collided restitution coefficient	T₈：有机肥-不锈钢静摩擦系数Organic fertilizer-steel static friction coefficient	T₁₀：JKR 表面能 JKR surface energy/（J·m^-2）	Y：堆积角 Repose angle/（°）
1	0.25	0.25	0.35	32.89
2	0.45	0.25	0.35	37.94
3	0.25	0.55	0.35	42.28
4	0.45	0.55	0.35	45.99
5	0.25	0.40	0.20	43.51
6	0.45	0.40	0.20	42.59
7	0.25	0.40	0.50	38.97
8	0.45	0.40	0.50	41.47
9	0.35	0.25	0.20	29.68
10	0.35	0.55	0.20	40.71
11	0.35	0.25	0.50	33.35
12	0.35	0.55	0.50	43.64
13	0.35	0.40	0.35	39.92
14	0.35	0.40	0.35	38.61
15	0.35	0.40	0.35	42.51

Table 6 ANOVA of Box-Behnken Design quadratic model

来源 Resources	自由度 Df	均方 SS_Adj	离均差平方和 MS_Adj	F值 F value	P值 P value
模型Model	9	275.110	30.568	23.50	0.001^**
T₇	1	0.684	0.684	0.53	0.501
T₈	1	135.795	135.795	104.41	0.000^**
T₁₀	1	79.002	79.002	60.75	0.001^**
T $72$	1	0.644	0.644	0.49	0.513
T $82$	1	40.759	40.759	31.34	0.003^**
T $102$	1	7.897	7.897	6.07	0.057
T₇T₈	1	0.109	0.109	0.08	0.784
T₇T₁₀	1	0.504	0.504	0.39	0.561
T₈T₁₀	1	10.693	10.693	8.22	0.035^*
误差Error	5	6.503	1.301
失拟项Lack of fit	3	4.211	1.404	1.23	0.479
纯误差Pure error	2	2.291	1.146
合计Sum	14	281.613

Table 6 ANOVA of Box-Behnken Design quadratic model

来源 Resources	自由度 Df	均方 SS_Adj	离均差平方和 MS_Adj	F值 F value	P值 P value
模型Model	9	275.110	30.568	23.50	0.001^**
T₇	1	0.684	0.684	0.53	0.501
T₈	1	135.795	135.795	104.41	0.000^**
T₁₀	1	79.002	79.002	60.75	0.001^**
T $72$	1	0.644	0.644	0.49	0.513
T $82$	1	40.759	40.759	31.34	0.003^**
T $102$	1	7.897	7.897	6.07	0.057
T₇T₈	1	0.109	0.109	0.08	0.784
T₇T₁₀	1	0.504	0.504	0.39	0.561
T₈T₁₀	1	10.693	10.693	8.22	0.035^*
误差Error	5	6.503	1.301
失拟项Lack of fit	3	4.211	1.404	1.23	0.479
纯误差Pure error	2	2.291	1.146
合计Sum	14	281.613

Table 7 Model verification test results

组别 Group	含水率 Moisture content/%	堆积角试验值 Repose angle test value/（°）	堆积角仿真值 Repose angle simulation value/（°）	相对误差 Relative error/%	有机肥-不锈钢碰撞恢复系数 Organic fertilizer-steel collided restitution coefficient	有机肥-不锈钢静摩擦系数Organic fertilizer-steel static friction coefficient	JKR表面能 JKR surface energy/（J·m^-2）
A₁	41.21	37.25	37.84	1.56	0.43	0.34	0.22
A₂	44.46	38.67	39.53	2.18	0.29	0.35	0.24
A₃	51.37	41.62	42.73	2.60	0.35	0.36	0.32
A₄	56.56	42.83	41.52	3.06	0.26	0.39	0.32
A₅	60.52	45.53	46.81	2.73	0.43	0.38	0.47

Fig. 3 Relationship between water content and physical accumulation angle of organic fertilizer

Fig. 4 Relationship between normal stress and shear strength of organic fertilizers with different moisture content

Fig. 5 Variation curve of cohesion and internal friction angle of organic fertilizer with different moisture content

References 23

1	陈秋红,张宽.新中国70年畜禽养殖废弃物资源化利用演进[J].中国人口·资源与环境,2020,30(6):166-176.
	CHEN Q H, ZHANG K. The evolution of resource utilization of livestock and poultry breeding waste in the past 70 years since the founding of P.R. China [J]. China Population,Resour. Environ., 2020, 30(6):166-176.
2	BESKINA K V, HOLCOMBA C D, CAMMACKA J A, et al.. Larval digestion of different manure types by the black soldier fly(Diptera:Stratiomyidae) impacts associated volatile emissions [J]. Waste Manage., 2018, 74: 213-220.
3	杨晓杰,游秀峰,李为争,等.虫粪的生态学功能[J].华中昆虫研究, 2019(15): 64-74.
	YANG X J, YOU X F, LI W Z, et al.. Ecological significance of insect frass [J]. Insects Res. Central China, 2019(15): 64-74.
4	徐齐云,龙镜池,叶明强,等.黑水虻幼虫的发育速率及食物转化率研究[J].环境昆虫学报,2014,36(4):561-564.
	XU Q Y, LONG J C, YE M Q, et al.. Development rate and food conversion efficiency of black soldier fly,Hermetia illucens [J]. J. Environ. Entomol., 2014,36 (4): 561-564.
5	袁橙,魏冬霞,解慧梅,等.黑水虻幼虫处理规模化猪场粪污的试验研究[J].畜牧与兽医,2019,51 (11): 49-53.
	YUAN C, WEI D X, XIE H M, et al.. Research on treatment of fecal pollution on large scale pig farms with black soldier fly larva [J]. Anim. Husbandry Vet-erinary Med., 2019,51(11): 49-53.
6	王小波,蔡瑞婕,耿维娜,等.黑水虻生物转化猪粪过程中重金属的迁移变化[J].农业工程学报,2020,36(20):263-268.
	WANG X B, CAI R J, GENG W N, et al.. Migration and changes of heavy metals during biotransformation of pig manure by black soldier fly [J]. Trans. Chin. Soc. Agric. Eng., 2020, 36(20):263-268.
7	张金金,王瑞华,张邦,等.黑水虻幼虫粉对蛋鸡产蛋后期生产性能、蛋品质及血液生理生化指标的影响[J].动物营养学报,2020,32(4):1658-1665.
	ZHANG J J, WANG R H, ZHANG B, et al.. Effects of black soldier fly larvae meal on performance, egg quality and blood physiological and biochemical parameters of hens during late laying period [J]. Chin. J. Anim. Nutr., 2020, 32(4):1658-1665.
8	彭才望,许道军,贺喜,等.黑水虻处理的猪粪有机肥离散元仿真模型参数标定[J].农业工程学报,2020,36(17):212-218.
	PENG C W, XU D J, HE X, et al.. Parameter calibration of discrete element simulation model for pig manure organic fertilizer treated with Hermetia illucen [J]. Trans. Chin. Soc. Agric. Eng., 2020, 36(17): 212-218.
9	彭才望,贺喜,孙松林,等.斗式黑水虻处理猪粪有机肥取料机设计与试验[J].农业机械学报,2021,52(2):145-156.
	PENG C W, HE X, SUN S L, et al.. Design and experiment on shoveling device of pig manure organic fertilizer by Hermetia illucen transforming based on bucket-wheel mechanism [J]. Trans. Chin. Soc. Agric. Mach., 2021,52(2):145-156.
10	彭才望,孙松林,贺喜,等.双向螺旋黑水虻虫沙收集装置设计与试验[J].浙江大学学报(农业与生命科学版),2020,46(5):637-646.
	PENG C W, SUN S L, HE X, et al.. Design and experiment of bidirectional spiral collecting device for Hermetia illucens insect sand [J]. J. Zhejiang Univ. (Agric. Life Sci.), 2020,46(5):637-646.
11	谢洪勇,刘志军.粉体力学与工程[M].北京:化学工业出版社,2007:31-32.
12	李俊伟,佟金,胡斌,等.不同含水率黏重黑土与触土部件互作的离散元仿真参数标定[J]. 农业工程学报,2019,35(6):130-140.
	LI J W, TONG J, HU B, et al.. Calibration of parameters of interaction between clayey black soil with different moisture content and soil-engaging component in northeast China [J]. Trans. Chin. Soc. Agric. Eng., 2019, 35(6): 130-140.
13	林嘉聪,罗帅,袁巧霞,等.不同含水率蚯蚓粪颗粒物料流动性研究[J]. 农业工程学报,2019,35(9):221-227.
	LIN J C, LUO S, YUAN Q X, et al.. Flow properties of vermicompost particle with different moisture contents [J]. Trans. Chin. Soc. Agric. Eng., 2019, 35(9):221-227.
14	罗帅,袁巧霞, GOUDA Shaban,等.基于JKR粘结模型的蚯蚓粪基质离散元法参数标定[J].农业机械学报,2018,49(4):343-350.
	LUO S, YUAN Q X, SHABAN G, et al.. Parameters calibration of vermicomposting nursery substrate with discrete element method based on JKR contact model [J]. Trans. Chin. Soc. Agric. Mach., 2018,49(4):343-350.
15	王黎明,范盛远,程红胜,等.基于 EDEM 的猪粪接触参数标定[J].农业工程学报,2020,36(15):95-102.
	WANG L M, FAN S Y, CHENG H S, et al.. Calibration of contact parameters for pig manure based on EDEM [J]. Trans. Chin. Soc. Agric. Eng., 2020, 36(15): 95-102.
16	袁全春,徐丽明,邢洁洁,等. 机施有机肥散体颗粒离散元模型参数标定[J].农业工程学报,2018,34(18):21-27.
	YUAN Q C, XU L M, XING J J, et al.. Parameter calibration of discrete element model of organic fertilizer particles for mechanical fertilization [J]. Trans. Chin. Soc. Agric. Eng., 2018,34(18):21-27.
17	王宪良,胡红,王庆杰,等. 基于离散元的土壤模型参数标定方法[J].农业机械学报,2017,48(12):78-85.
	WANG X L, HU H, WANG Q J, et al.. Calibration method of soil contact characteristic parameters based on DEM theory [J]. Trans. Chin. Soc. Agric. Mach., 2017, 48(12):78-85.
18	石林榕,赵武云,孙伟. 基于离散元的西北旱区农田土壤颗粒接触模型和参数标定[J]. 农业工程学报,2017,33(21):181-187.
	SHI L R, ZHAO W Y, SUN W. Parameter calibration of soil particles contact model of farmland soil in northwest arid region based on discrete element method [J]. Trans. Chin. Soc. Agric. Eng., 2017, 33(21): 181-187.
19	田晓红,李光涛,张淑丽. 谷物自然休止角测量方法的探究[J]. 粮食加工,2010,35(1):68-71.
	TIAN X H, LI G T, ZHANG S L. Determination of angle of repose [J]. Grain Process., 2010, 35(1): 68-71.
20	UCGUL M, FIELKE J M, SAUNDERS C. Three-dimensional discrete element modelling (DEM) of tillage: accounting for soil cohesion and adhesion [J]. Biosyst. Eng., 2015, 129(1): 298-306.
21	PEELE K A, RUPANIDHI S, REDDY E R, et al.. Plackett-Burman design for screening of process components and their effects on production of lactase by newly isolated Bacillus sp. VUVD101 strain from dairy effluent [J].Beni-Suef Univ. J. Basic Appl. Sci., 2018, 7(4): 543-546.
22	JOHNSON K L, KENDALL K, ROBERTS A D. Surface energy and the contact of elastic solids [J]. Proc. R. Soc. Lond. A, 1971,324(1558): 301-313.
23	KALKAN F, KARA M. Handling, frictional and technological properties of wheat as affected by moisture content and cultivar [J]. Powder Technol., 2011, 213(1/3): 116-122.

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